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Abou Yassine, Rayane ; Adamczewski-Musch, Jörn ; Becker, Marten ; Bergmann, Philip ; Blanco, Alberto ; Blume, Christoph ; Chlad, Lukas ; Chudoba, Petr ; Ciepał, Izabela ; Cordts, Malte ; Dreyer, Jörn ; Esmail, Waleed Ahmed ; Firlej, Miroslaw ; Fiutowski, Tomasz ; Floersheimer, Henrik ; Fonte, Paulo ; Friese, Jürgen ; Fröhlich, Ingo ; Förtsch, Jörg ; Galatyuk, Tetyana ; Gniazdowski, Tomasz ; Greifenhagen, Robert ; Grunwald, Mateusz ; Grzonka, Dieter ; Gumberidze, Malgorzata ; Harabasz, Szymon ; Heinz, Thorsten ; Höhne, Claudia ; Hojeij, Fatima ; Holzmann, Romain ; Huck, Holger ; Idzik, Marek ; Kämpfer, Burkhard ; Kampert, Karl-Heinz ; Kardan, Behruz ; Kedych, Vadym ; Koenig, Ilse ; Koenig, Wolfgang ; Kohls, Marvin ; Kołaś, Jędrzej ; Korcyl, Grzegorz ; Kornakov, Georgy ; Kornas, Frédéric Julian ; Kotte, Roland ; Krueger, Wilhelm ; Kugler, Andrej ; Kulessa, Pawel ; Lalik, Rafał Tomasz ; Lebedev, Semen ; Linev, Sergey ; Lopes, Luis Alberto Vieira ; Lorenz, Manuel ; Malige, Akshay ; Markert, Jochen ; Matulewicz, Tomasz ; Messchendorp, Johannes Gerhardus ; Metag, Volker ; Michel, Jan ; Molenda, Aleksandra ; Moron, Jakub ; Müntz, Christian ; Nabroth, Marvin ; Naumann, Lothar ; Orliński, Jan ; Otto, Jan-Hendrik ; Parpottas, Yannis ; Parschau, Mirco ; Pauly, Christian ; Pechenov, Vladimir ; Pechenova, Olga ; Perez Andrade, Gabriela ; Pfeifer, Dennis ; Piasecki, Krzysztof ; Pietraszko, Jerzy ; Povar, Tetiana ; Prozorov, Alexandr ; Przygoda, Witold ; Pysz, Krzysztof ; Ramstein, Béatrice ; Rathod, Narendra ; Ritman, James Lambrecht ; Rost, Adrian ; Rustamov, Anar ; Salabura, Piotr ; Saraiva, Joao ; Schadmand, Susan ; Schild, Niklas ; Schwab, Erwin ; Seck, Florian ; Selyuzhenkov, Ilya ; Singh, Udai ; Skorpil, Leon ; Smyrski, Jerzy ; Sobiella, Manfred ; Spataro, Stefano ; Spies, Simon ; Stefaniak, Maria ; Ströbele, Herbert ; Stroth, Joachim ; Sumara, Konrad ; Svoboda, Ondřej ; Swientek, Krzysztof ; Szala, Melanie ; Tlusty, Pavel ; Traxler, Michael ; Tsertos, Haralabos ; Wagner, Vladimir ; Wasiluk, Mateusz ; Weber, Adrian Amatus ; Wendisch, Christian ; Wintz, Peter ; Zbroszczyk, Hanna ; Zherebtsova, Elizaveta S. ; Zielinski, Marcin ; Zumbruch, Peter W.
In March 2019 the HADES experiment recorded 14 billion Ag+Ag collisions at √sNN = 2.55 GeV as a part of the FAIR phase-0 physics program. In this contribution, we present and investigate our capabilities to reconstruct and analyze weakly decaying strange hadrons and hypernuclei emerging from these collisions. The focus is put on measuring the mean lifetimes of these particles.
Adamczewski-Musch, Jörn ; Arnold, Oliver ; Behnke, Claudia ; Belounnas, Amel ; Belyaev, Alexander ; Berger-Chen, Jia-Chii ; Blanco, Alberto ; Blume, Christoph ; Böhmer, Michael ; Bordalo, Paula ; Chernenko, Sergey ; Chlad, Lukáš ; Ciepał, Izabela ; Deveaux, Christina Anna ; Dreyer, Jörn ; Epple, Eliane ; Fabbietti, Laura ; Fateev, Oleg ; Filip, Peter ; Fonte, Paulo ; Franco, Celso ; Friese, Jürgen ; Fröhlich, Ingo ; Galatyuk, Tetyana ; Garzón, Juan A. ; Gernhäuser, Roman ; Golubeva, Marina ; Greifenhagen, Robert ; Guber, Fedor ; Gumberidze, Malgorzata ; Harabasz, Szymon ; Heinz, Torsten ; Hennino, Thierry ; Hlaváč, Stanislav ; Höhne, Claudia ; Holzmann, Romain ; Ierusalimov, Alexander P. ; Ivashkin, Alexander ; Kämpfer, Burkhard ; Karavicheva, Tatiana L. ; Kardan, Behruz ; Koenig, Ilse ; Koenig, Wolfgang ; Kohls, Marvin ; Kolb, Burkhard W. ; Korcyl, Grzegorz ; Kornakov, Georgy ; Kornas, Frédéric Julian ; Kotte, Roland ; Kugler, Andrej ; Kunz, Tobias ; Kurepin, Alexei ; Kurilkin, Aleksey K. ; Kurilkin, Pavel ; Ladygin, Vladimir P. ; Lalik, Rafał Tomasz ; Lapidus, Kirill ; Lebedev, Alexander ; Lopes, Luis Alberto Vieira ; Lorenz, Manuel ; Mahmoud, Tariq ; Maier, Ludwig W. ; Malige, Akshay ; Mangiarotti, Alessio ; Markert, Jochen ; Matulewicz, Tomasz ; Maurus, Steffen ; Metag, Volker ; Michel, Jan ; Mihaylov, Dimitar ; Morozov, Sergey ; Müntz, Christian ; Münzer, Robert Helmut ; Naumann, Lothar ; Nowakowski, Krzysztof ; Parpottas, Yannis ; Pechenov, Vladimir ; Pechenova, Olga ; Petukhov, Oleg ; Piasecki, Krzysztof ; Pietraszko, Jerzy ; Przygoda, Witold ; Pysz, Krzysztof ; Ramos, Sérgio ; Ramstein, Béatrice ; Rathod, Narendra ; Reshetin, Andrey ; Rodríguez Ramos, Pablo ; Rosier, Philippe ; Rost, Adrian ; Sadovsky, Alexander ; Salabura, Piotr ; Scheib, Timo ; Schuldes, Heidi ; Schwab, Erwin ; Scozzi, Federico ; Seck, Florian ; Sellheim, Patrick ; Selyuzhenkov, Ilya ; Siebenson, Johannes Stephan ; Silva, Luis ; Singh, U. ; Smyrski, Jerzy ; Sobolev, Yuri G. ; Spataro, Stefano ; Spies, Simon ; Ströbele, Herbert ; Stroth, Joachim ; Sturm, Christian ; Svoboda, Ondřej ; Szala, Melanie ; Tlustý, Pavel ; Traxler, Michael ; Tsertos, Haralabos ; Usenko, Evgeny A. ; Wagner, Vladimir ; Wendisch, Christian ; Wiebusch, Michael ; Wirth, Joana ; Wójcik, Daniel Krzysztof ; Zanevsky, Yuri V. ; Zumbruch, Peter W.
In this letter we report the first multi-differential measurement of correlated pion-proton pairs from 2 billion Au+Au collisions at sNN=2.42 GeV collected with HADES. In this energy regime the population of Δ(1232) resonances plays an important role in the way energy is distributed between intrinsic excitation energy and kinetic energy of the hadrons in the fireball. The triple differential d3N/dMπ±pdpTdy distributions of correlated π±p pairs have been determined by subtracting the πp combinatorial background using an iterative method. The invariant-mass distributions in the Δ(1232) mass region show strong deviations from a Breit-Wigner function with vacuum width and mass. The yield of correlated pion-proton pairs exhibits a complex isospin, rapidity and transverse-momentum dependence. In the invariant mass range 1.1<Minv(GeV/c2)<1.4, the yield is found to be similar for π+p and π−p pairs, and to follow a power law 〈Apart〉α, where 〈Apart〉 is the mean number of participating nucleons. The exponent α depends strongly on the pair transverse momentum (pT) while its pT-integrated and charge-averaged value is α=1.5±0.08st±0.2sy.
Salabura, Piotr ; Adamczewski-Musch, Jörn ; Arnoldi-Meadows, Benedict ; Belounnas, Amel ; Belyaev, Alexei V. ; Blanco, Alberto ; Blume, Christoph ; Böhmer, Michael ; Borisenko, S. ; Chlad, Lukáš ; Chudoba, Petr ; Ciepał, Izabela ; Dittert, Dominique ; Dreyer, Jörn ; Esmail, Waleed Ahmed Mohammed ; Dürr, Michael ; Fabbietti, Laura ; Fateev, Oleg ; Fonte, Paulo ; Friese, Jürgen ; Fröhlich, Ingo ; Förtsch, Jörg ; Galatyuk, Tetyana ; Gernhäuser, Roman ; Golosov, Oleg ; Golubeva, Marina ; Greifenhagen, Robert ; Guber, Fedor ; Gumberidze, Malgorzata ; Harabasz, Szymon ; Hensch, Roman ; Höhne, Claudia ; Holzmann, Romain ; Huck, Holger ; Ierusalimov, Alexander P. ; Ivashkin, Alexander ; Kämpfer, Burkhard ; Kampert, Karl-Heinz ; Kardan, Behruz ; Koenig, Ilse ; Koenig, Wolfgang ; Kornakov, Georgy ; Kornas, Frédéric Julian ; Kotte, Roland ; Kozela, Adam ; Kres, Ievgenii ; Kuboś, Joanna ; Kugler, Andrej ; Kulessa, Pawel ; Ladygin, Vladimir P. ; Lalik, Rafał Tomasz ; Lebedev, Alexei ; Lebedev, Semen ; Linev, Serguei ; Lopes, Luis Alberto Vieira ; Lorenz, Manuel ; Lykasov, Gennady ; Mahmoud, Tariq ; Malige, Akshay ; Markert, Jochen ; Matulewicz, Tomasz ; Maurus, Steffen ; Metag, Volker ; Michel, Jan ; Morozov, Sergey ; Müntz, Christian ; Naumann, Lothar ; Nowakowski, Krzysztof ; Otto, Jan-Hendrik ; Patel, Vivek ; Pauly, Christian ; Pechenov, Vladimir ; Pechenova, Olga ; Petukhov, Oleg ; Pfeifer, Dennis ; Piasecki, Krzysztof ; Pietraszko, Jerzy ; Prozorov, Alexandr ; Przygoda, Witold ; Pysz, Krzysztof ; Ramstein, Béatrice ; Rathod, Narendra ; Reshetin, Andrey ; Ritman, James Lambrecht ; Rodríguez Ramos, Pablo ; Rost, Adrian ; Salabura, Piotr ; Scozzi, Federico ; Seck, Florian ; Selyuzhenkov, Ilya ; Shabanov, I. ; Singh, Udai ; Smyrski, Jerzy ; Spies, Simon ; Ströbele, Herbert ; Stroth, Joachim ; Stumm, Julia ; Svoboda, Ondřej ; Szala, Melanie ; Tlustý, Pavel ; Traxler, Michael ; Ungethüm, Carina ; Vázquez Doce, Oton ; Wagner, Vladimir ; Weber, Adrian Amatus ; Wendisch, Christian ; Wiebusch, Michael ; Wintz, Peter ; Wirth, Joana ; Zhilin, Alexander ; Zumbruch, Peter W.
Radiative transition of an excited baryon to a nucleon with emission of a virtual massive photon converting to dielectron pair (Dalitz decays) provides important information about baryon-photon coupling at low q2 in timelike region. A prominent enhancement in the respective electromagnetic transition Form Factors (etFF) at q2 near vector mesons ρ/ω poles has been predicted by various calculations reflecting strong baryon-vector meson couplings. The understanding of these couplings is also of primary importance for the interpretation of the emissivity of QCD matter studied in heavy ion collisions via dilepton emission. Dedicated measurements of baryon Dalitz decays in proton-proton and pion-proton scattering with HADES detector at GSI/FAIR are presented and discussed. The relevance of these studies for the interpretation of results obtained from heavy ion reactions is elucidated on the example of the HADES results.
Adamczewski-Musch, Jörn ; Arnold, Oliver Werner ; Behnke, Claudia ; Belounnas, Amel ; Belyaev, Alexei V. ; Berger-Chen, Jia-Chii ; Biernat, Jacek ; Blanco, Alberto ; Blume, Christoph ; Böhmer, Michael ; Bordalo, Paula ; Chernenko, Sergey P. ; Chlad, Lukáš ; Deveaux, Christina Anna ; Dreyer, Jörg ; Dybczak, Adrian ; Epple, Eliane ; Fabbietti, Laura ; Fateev, Oleg ; Filip, Peter ; Fonte, Paulo ; Franco, Celso ; Friese, Jürgen ; Fröhlich, Ingo ; Galatyuk, Tetyana ; Garzón, Juan A. ; Gernhäuser, Roman ; Golubeva, Marina ; Greifenhagen, Robert ; Guber, Fedor ; Gumberidze, Malgorzata ; Harabasz, Szymon ; Heinz, Tobias ; Hennino, Thierry ; Hlaváč, Stanislav ; Höhne, Claudia ; Holzmann, Romain ; Ierusalimov, Alexander P. ; Ivashkin, Alexander ; Kämpfer, Burkhard ; Karavicheva, Tatiana L. ; Kardan, Behruz ; Koenig, Ilse ; Koenig, Wolfgang ; Kolb, Burkhard W. ; Korcyl, Grzegorz ; Kornakov, Georgy ; Kotte, Roland ; Kugler, Andrej ; Kunz, Tobias ; Kurepin, Alexander ; Kurilkin, Aleksey K. ; Kurilkin, Pavel ; Ladygin, Vladimir P. ; Lalik, Rafał Tomasz ; Lapidus, Kirill ; Lebedev, Alexei ; Lopes, Luis Alberto Vieira ; Lorenz, Manuel ; Mahmoud, Tariq ; Maier, Ludwig W. ; Mangiarotti, Alessio ; Markert, Jochen ; Maurus, Steffen ; Metag, Volker ; Michel, Jan ; Mihaylov, Dimitar ; Morozov, Sergey ; Müntz, Christian ; Münzer, Robert Helmut ; Naumann, Lothar ; Nowakowski, Krzysztof ; Palka, Marek ; Parpottas, Yannis ; Pechenov, Vladimir ; Pechenova, Olga ; Petukhov, Oleg ; Pietraszko, Jerzy ; Przygoda, Witold ; Ramos, Sérgio ; Ramstein, Béatrice ; Reshetin, Andrey ; Rodriguez Ramos, Pablo ; Rosier, Philippe ; Rost, Adrian ; Sadovsky, Alexander ; Salabura, Piotr ; Scheib, Timo ; Schuldes, Heidi ; Schwab, Erwin ; Scozzi, Federico ; Seck, Florian ; Sellheim, Patrick ; Selyuzhenkov, Ilya ; Siebenson, Johannes Stephan ; Silva, Luis ; Sobolev, Yuri G. ; Spataro, Stefano ; Spies, Simon ; Ströbele, Herbert ; Stroth, Joachim ; Strzempek, Paweł ; Sturm, Christian Thomas ; Svoboda, Ondřej ; Szala, Melanie ; Tlustý, Pavel ; Traxler, Michael ; Tsertos, Haralabos ; Usenko, Evgeny A. ; Wagner, Vladimir ; Wendisch, Christian ; Wiebusch, Michael ; Wirth, Joana ; Zanevsky, Yuri V. ; Zumbruch, Peter W. ; Leifels, Yvonne
We present first data on sub-threshold production of Ks0 mesons and Λ hyperons in Au+Au collisions at sNN=2.4 GeV. We observe an universal 〈Apart〉 scaling of hadrons containing strangeness, independent of their corresponding production thresholds. Comparing the yields, their 〈Apart〉 scaling, and the shapes of the rapidity and the pt spectra to state-of-the-art transport model (UrQMD, HSD, IQMD) predictions, we find that none of them can simultaneously describe these observables with reasonable χ2 values.
Adamczewski-Musch, Jörn ; Arnold, Oliver Werner ; Behnke, Claudia ; Belounnas, Amel ; Belyaev, Alexei V. ; Berger-Chen, Jia-Chii ; Biernat, Jacek ; Blanco, Alberto ; Blume, Christoph ; Böhmer, Michael ; Bordalo, Paula ; Chernenko, Sergey P. ; Chlad, Lukáš ; Deveaux, Christina Anna ; Dreyer, Jörn ; Dybczak, Adrian ; Epple, Eliane ; Fabbietti, Laura ; Fateev, Oleg ; Filip, Peter ; Fonte, Paulo ; Franco, Celso ; Friese, Jürgen ; Fröhlich, Ingo ; Galatyuk, Tetyana ; Garzón, Juan A. ; Gernhäuser, Roman ; Golubeva, Marina ; Greifenhagen, Robert ; Guber, Fedor ; Gumberidze, Malgorzata ; Harabasz, Szymon ; Heinz, Tobias ; Hennino, Thierry ; Hlaváč, Stanislav ; Höhne, Claudia ; Holzmann, Romain ; Ierusalimov, Alexander P. ; Ivashkin, Alexander ; Kämpfer, Burkhard ; Karavicheva, Tatiana L. ; Kardan, Behruz ; Koenig, Ilse ; Koenig, Wolfgang ; Kolb, Burkhard W. ; Korcyl, Grzegorz ; Kornakov, Georgy ; Kotte, Roland ; Kugler, Andrej ; Kunz, Tobias ; Kurepin, Alexander ; Kurilkin, Aleksey K. ; Kurilkin, Pavel ; Ladygin, Vladimir P. ; Lalik, Rafał Tomasz ; Lapidus, Kirill ; Lebedev, Alexei ; Lopes, Luis Alberto Vieira ; Lorenz, Manuel ; Mahmoud, Tariq ; Maier, Ludwig W. ; Mangiarotti, Alessio ; Markert, Jochen ; Matulewicz, Tomasz ; Maurus, Steffen ; Metag, Volker ; Michel, Jan ; Mihaylov, Dimitar ; Morozov, Sergey ; Müntz, Christian ; Münzer, Robert Helmut ; Naumann, Lothar ; Nowakowski, K. ; Palka, Marek ; Parpottas, Yannis ; Pechenov, Vladimir ; Pechenova, Olga ; Petukhov, Oleg ; Piasecki, Krzysztof ; Pietraszko, Jerzy ; Przygoda, Witold ; Ramos, Sérgio ; Ramstein, Béatrice ; Reshetin, Andrey ; Rodriguez Ramos, Pablo ; Rosier, Philippe ; Rost, Adrian ; Sadovsky, Alexander ; Salabura, Piotr ; Scheib, Timo ; Schuldes, Heidi ; Schwab, Erwin ; Scozzi, Federico ; Seck, Florian ; Sellheim, Patrick ; Selyuzhenkov, Ilya ; Siebenson, Johannes Stephan ; Silva, Luis ; Sobolev, Yuri G. ; Spataro, Stefano ; Spies, Simon ; Ströbele, Herbert ; Stroth, Joachim ; Strzempek, Paweł ; Sturm, Christian Thomas ; Svoboda, Ondřej ; Szala, Melanie ; Tlustý, Pavel ; Traxler, Michael ; Tsertos, Haralabos ; Usenko, Evgeny A. ; Wagner, Vladimir ; Wendisch, Christian ; Wiebusch, Michael ; Wirth, Joana ; Wójcik, Daniel Krzysztof ; Zanevsky, Yuri V. ; Zumbruch, Peter W.
We investigate identical pion HBT intensity interferometry in central Au+Au collisions at 1.23A GeV. High-statistics π−π− and π+π+ data are measured with HADES at SIS18/GSI. The radius parameters, derived from the correlation function depending on relative momenta in the longitudinally comoving system and parametrized as three-dimensional Gaussian distribution, are studied as function of transverse momentum. A substantial charge-sign difference of the source radii is found, particularly pronounced at low transverse momentum. The extracted source parameters agree well with a smooth extrapolation of the center-of-mass energy dependence established at higher energies, extending the corresponding excitation functions down towards a very low energy.
Adamczewski-Musch, Jörn ; Agakishiev, Geydar ; Arnold, Oliver Werner ; Atomssa, Ermias T. ; Behnke, Claudia ; Berger-Chen, Jia-Chii ; Biernat, Jacek ; Blanco, Alberto ; Blume, Christoph ; Böhmer, Michael ; Bordalo, Paula ; Chernenko, Sergey P. ; Deveaux, Christina Anna ; Dybczak, Adrian ; Epple, Eliane ; Fabbietti, Laura ; Fateev, Oleg ; Fonte, Paulo ; Franco, Celso ; Friese, Jürgen ; Fröhlich, Ingo ; Galatyuk, Tetyana ; Garzón, Juan A. ; Gernhäuser, Roman ; Gill, Katharina ; Golubeva, Marina ; Guber, Fedor ; Gumberidze, Malgorzata ; Harabasz, Szymon ; Hennino, Thierry ; Hlaváč, Stanislav ; Höhne, Claudia ; Holzmann, Romain ; Ierusalimov, Alexander P. ; Ivashkin, Alexander ; Jurkovič, Martin ; Kämpfer, Burkhard ; Karavicheva, Tatiana L. ; Kardan, Behruz ; Koenig, Ilse ; Koenig, W. ; Kolb, Burkhard W. ; Korcyl, Grzegorz ; Kornakov, Georgy ; Kotte, Roland ; Krása, Antonin ; Krebs, Erik ; Kuc, Hubert ; Kugler, Andrej ; Kunz, Tobias ; Kurepin, Alexander ; Kurilkin, Aleksey K. ; Kurilkin, Pavel ; Ladygin, Vladimir P. ; Lalik, Rafał Tomasz ; Lapidus, Kirill ; Lebedev, Alexei ; Lopes, Luis Alberto Vieira ; Lorenz, Manuel ; Mahmoud, Tariq ; Maier, Ludwig W. ; Maurus, Steffen ; Mangiarotti, Alessio ; Markert, Jochen ; Metag, Volker ; Michel, Jan ; Müntz, Christian ; Münzer, Robert Helmut ; Naumann, Lothar ; Palka, Marek ; Parpottas, Yannis ; Pechenov, Vladimir ; Pechenova, Olga ; Petousis, Vlasios ; Pietraszko, Jerzy ; Przygoda, Witold ; Ramos, S. ; Ramstein, Béatrice ; Rehnisch, Laura ; Reshetin, Andrey ; Rost, Adrian ; Rustamov, Anar ; Sadovsky, Alexander ; Salabura, Piotr ; Scheib, Timo ; Schmidt-Sommerfeld, Korbinian ; Schuldes, Heidi ; Sellheim, Patrick ; Siebenson, Johannes Stephan ; Silva, L. ; Sobolev, Yuri G. ; Spataro, Stefano ; Ströbele, Herbert ; Stroth, Joachim ; Strzempek, Paweł ; Sturm, C. ; Svoboda, Ondřej ; Tarantola Peloni, Attilio ; Teilab, Khaled ; Tlustý, Pavel ; Traxler, Michael ; Tsertos, Haralabos ; Vasiliev, Taras A. ; Wagner, Vladimir ; Wendisch, Christian ; Wirth, Joana ; Wüstenfeld, Jörn ; Zanevsky, Yuri V. ; Zumbruch, Peter W.
The production of Σ0 baryons in the nuclear reaction p (3.5 GeV) + Nb (corresponding to sNN=3.18 GeV) is studied with the detector set-up HADES at GSI, Darmstadt. Σ0s were identified via the decay Σ0→Λγ with subsequent decays Λ→pπ− in coincidence with a e+e− pair from either external (γ→e+e−) or internal (Dalitz decay γ⁎→e+e−) gamma conversions. The differential Σ0 cross section integrated over the detector acceptance, i.e. the rapidity interval 0.5<y<1.1, has been extracted as ΔσΣ0=2.3±(0.2)stat±(−0.6+0.6)sys±(0.2)norm mb, yielding the inclusive production cross section in full phase space σΣ0total=5.8±(0.5)stat±(−1.4+1.4)sys±(0.6)norm±(1.7)extrapol mb by averaging over different extrapolation methods. The Λall/Σ0 ratio within the HADES acceptance is equal to 2.3±(0.2)stat±(−0.6+0.6)sys. The obtained rapidity and momentum distributions are compared to transport model calculations. The Σ0 yield agrees with the statistical model of particle production in nuclear reactions. Keywords: Hyperons, Strangeness, Proton, Nucleus.
Adamczewski-Musch, Jörn ; Arnold, Oliver Werner ; Behnke, Claudia ; Belounnas, Amel ; Belyaev, A. ; Berger-Chen, Jia-Chii ; Biernat, Jacek ; Blanco, Alberto ; Blume, Christoph ; Böhmer, Michael ; Bordalo, Paula ; Chernenko, Sergey P. ; Chlad, Lukáš ; Deveaux, Christina Anna ; Dreyer, J. ; Dybczak, Adrian ; Epple, Eliane ; Fabbietti, Laura ; Fateev, Oleg ; Filip, Peter ; Fonte, Paulo ; Franco, Celso ; Friese, Jürgen ; Fröhlich, Ingo ; Galatyuk, Tetyana ; Garzón, Juan A. ; Gernhäuser, Roman ; Golubeva, Marina ; Greifenhagen, Robert ; Guber, Fedor ; Gumberidze, Malgorzata ; Harabasz, Szymon ; Heinz, Tobias ; Hennino, Thierry ; Hlaváč, Stanislav ; Höhne, Claudia ; Holzmann, Romain ; Ierusalimov, Alexander P. ; Ivashkin, Alexander ; Kämpfer, Burkhard ; Karavicheva, Tatiana L. ; Kardan, Behruz ; Koenig, Ilse ; Koenig, W. ; Kolb, Burkhard W. ; Korcyl, Grzegorz ; Kornakov, Georgy ; Kotte, Roland ; Kühn, Wolfgang ; Kugler, Andrej ; Kunz, Tobias ; Kurepin, Alexander ; Kurilkin, Aleksey K. ; Kurilkin, Pavel ; Ladygin, Vladimir P. ; Lalik, Rafał Tomasz ; Lapidus, Kirill ; Lebedev, Alexei ; Lopes, Lourenco Vaz Gil ; Lorenz, Manuel ; Mahmoud, Tariq ; Maier, Ludwig W. ; Mangiarotti, Alessio ; Markert, Jochen ; Maurus, Steffen ; Metag, Volker ; Michel, Jan ; Mihaylov, Dimitar ; Morozov, Sergey ; Müntz, Christian ; Münzer, Robert Helmut ; Naumann, Lothar ; Nowakowski, K.N. ; Palka, Marek ; Parpottas, Yannis ; Pechenov, Vladimir ; Pechenova, Olga ; Petukhov, Oleg ; Pietraszko, Jerzy ; Przygoda, Witold ; Ramos, S. ; Ramstein, Béatrice ; Reshetin, Andrey ; Rodriguez Ramos, Pablo ; Rosier, Philippe ; Rost, Adrian ; Sadovsky, Alexander ; Salabura, Piotr ; Scheib, Timo ; Schuldes, Heidi ; Schwab, Erwin ; Scozzi, Federico ; Seck, Florian ; Sellheim, Patrick ; Siebenson, Johannes Stephan ; Silva, L. ; Sobolev, Yuri G. ; Spataro, Stefano ; Ströbele, Herbert ; Stroth, Joachim ; Strzempek, Paweł ; Sturm, Christian Thomas ; Svoboda, Ondřej ; Szala, Melanie ; Tlustý, Pavel ; Traxler, Michael ; Tsertos, Haralabos ; Usenko, Evgeny A. ; Wagner, Vladimir ; Wendisch, Christian ; Wiebusch, Michael ; Wirth, Joana ; Zanevsky, Yuri V. ; Zumbruch, Peter W.
We present data on charged kaons (K±) and ϕ mesons in Au(1.23A GeV)+Au collisions. It is the first simultaneous measurement of K− and ϕ mesons in central heavy-ion collisions below a kinetic beam energy of 10A GeV. The ϕ/K− multiplicity ratio is found to be surprisingly high with a value of 0.52±0.16 and shows no dependence on the centrality of the collision. Consequently, the different slopes of the K+ and K− transverse-mass spectra can be explained solely by feed-down, which substantially softens the spectra of K− mesons. Hence, in contrast to the commonly adapted argumentation in literature, the different slopes do not necessarily imply diverging freeze-out temperatures of K+ and K− mesons caused by different couplings to baryons.
Partial wave analysis of the reaction p(3.5 GeV) + p → pK +Λ to search for the "ppK−" bound state
(2015)
Agakishiev, Geydar ; Arnold, Oliver Werner ; Belver, Daniel ; Belyaev, A. ; Berger-Chen, Jia-Chii ; Blanco, Alberto ; Böhmer, Michael ; Boyard, Jean-Louis ; Cabanelas Eiras, Pablo ; Chernenko, Sergey P. ; Dybczak, Adrian ; Epple, Eliane ; Fabbietti, Laura ; Fateev, Oleg ; Finocchiaro, Paolo ; Fonte, Paulo ; Friese, Jürgen ; Fröhlich, Ingo ; Galatyuk, Tetyana ; Garzón, Juan A. ; Gernhäuser, Roman ; Göbel, Kathrin ; Golubeva, Marina ; González-Díaz, Diégo ; Guber, Fedor ; Gumberidze, Malgorzata ; Heinz, T. ; Hennino, Thierry ; Holzmann, Romain ; Ierusalimov, Alexander P. ; Iori, Ileana ; Ivashkin, Alexander ; Jurkovič, Martin ; Kämpfer, Burkhard ; Karavicheva, Tatiana L. ; Koenig, Ilse ; Koenig, W. ; Kolb, Burkhard W. ; Kornakov, Georgy ; Kotte, Roland ; Krása, Antonin ; Krizek, Filip ; Krücken, Reiner ; Kuc, Hubert ; Kühn, Wolfgang ; Kugler, Andrej ; Kunz, Tobias ; Kurepin, Alexander ; Ladygin, Vladimir P. ; Lalik, Rafał Tomasz ; Lapidus, Kirill ; Lebedev, Alexei ; Lopes, Luis Alberto Vieira ; Lorenz, Manuel ; Maier, Ludwig W. ; Mangiarotti, Alessio ; Markert, Jochen ; Metag, Volker ; Michel, Jan ; Müntz, Christian ; Münzer, Robert Helmut ; Naumann, Lothar ; Pachmayer, Yvonne C. ; Palka, Marek ; Parpottas, Yannis ; Pechenov, Vladimir ; Pechenova, Olga ; Pietraszko, Jerzy ; Przygoda, Witold ; Ramstein, Béatrice ; Reshetin, Andrey ; Rustamov, Anar ; Sadovsky, Alexander ; Salabura, Piotr ; Schmah, Alexander ; Schwab, Erwin ; Siebenson, Johannes Stephan ; Sobolev, Yuri G. ; Spataro, Stefano ; Spruck, Björn ; Ströbele, Herbert ; Stroth, Joachim ; Sturm, C. ; Tarantola Peloni, Attilio ; Teilab, Khaled ; Tlustý, Pavel ; Traxler, Michael ; Tsertos, Haralabos ; Vasiliev, Taras A. ; Wagner, Vladimir ; Weber, Michael ; Wendisch, Christian ; Wüstenfeld, Jörn ; Yurevich, Sergey ; Zanevsky, Yuri V. ; Sarantsev, Andrei V.
Employing the Bonn–Gatchina partial wave analysis framework (PWA), we have analyzed HADES data of the reaction p(3.5 GeV) + p → pK +Λ. This reaction might contain information about the kaonic cluster “ppK −” (with quantum numbers J P = 0− and total isospin I = 1/2) via its decay into pΛ. Due to interference effects in our coherent description of the data, a hypothetical KNN (or, specifically “ppK −”) cluster signal need not necessarily show up as a pronounced feature (e.g. a peak) in an invariant mass spectrum like pΛ. Our PWA analysis includes a variety of resonant and non-resonant intermediate states and delivers a good description of our data (various angular distributions and two-hadron invariant mass spectra) without a contribution of a KNN cluster. At a confidence level of CLs = 95% such a cluster cannot contribute more than 2–12% to the total cross section with a pK +Λ final state, which translates into a production cross-section between 0.7 μb and 4.2 μb, respectively. The range of the upper limit depends on the assumed cluster mass, width and production process.
Abelev, Betty ; Adam, Jaroslav ; Adamová, Dagmar ; Aggarwal, Madan Mohan ; Aglieri Rinella, Gianluca ; Agnello, Michelangelo ; Agostinelli, Andrea ; Agrawal, Neelima ; Ahammed, Zubayer ; Ahmad, Nazeer ; Ahmed, Ijaz ; Ahn, Sang Un ; Ahn, Sul-Ah ; Aimo, Ilaria ; Aiola, Salvatore ; Ajaz, Muhammad ; Akindinov, Alexander ; Alam, Sk Noor ; Aleksandrov, Dmitry ; Alessandro, Bruno ; Alexandre, Didier ; Alici, Andrea ; Alkin, Anton ; Alme, Johan ; Alt, Torsten ; Altinpinar, Sedat ; Altsybeev, Igor ; Prado, Caio Alves Garcia ; Andrei, Cristian ; Andronic, Anton ; Anguelov, Venelin ; Anielski, Jonas ; Antičić, Tome ; Antinori, Federico ; Antonioli, Pietro ; Aphecetche, Laurent Bernard ; Appelshäuser, Harald ; Arcelli, Silvia ; Armesto Perez, Nestor ; Arnaldi, Roberta ; Aronsson, Tomas ; Arsene, Ionut Cristian ; Arslandok, Mesut ; Augustinus, Andre ; Averbeck, Ralf Peter ; Awes, Terry ; Azmi, Mohd Danish ; Bach, Matthias ; Badalà, Angela ; Baek, Yong Wook ; Bagnasco, Stefano ; Bailhache, Raphaëlle ; Bala, Renu ; Baldisseri, Alberto ; Baltasar Dos Santos Pedrosa, Fernando ; Baral, Rama Chandra ; Barbera, Roberto ; Barile, Francesco ; Barnaföldi, Gergely Gábor ; Barnby, Lee Stuart ; Ramillien Barret, Valerie ; Bartke, Jerzy ; Basile, Maurizio ; Bastid, Nicole ; Basu, Sumit ; Bathen, Bastian ; Batigne, Guillaume ; Batista Camejo, Arianna ; Batyunya, Boris ; Bätzing, Paul Christoph ; Baumann, Christoph Heinrich ; Bearden, Ian Gardner ; Beck, Hans ; Bedda, Cristina ; Behera, Nirbhay Kumar ; Belikov, Iouri ; Bellini, Francesca ; Bellwied, Rene ; Belmont Moreno, Ernesto ; Belmont Iii, Ronald John ; Belyaev, Vladimir ; Bencédi, Gyula ; Beolè, Stefania ; Berceanu, Ionela ; Bercuci, Alexandru ; Berdnikov, Yaroslav ; Berényi, Dániel ; Berger, Martin Emanuel ; Bertens, Redmer Alexander ; Berzano, Dario ; Betev, Latchezar ; Bhasin, Anju ; Bhat, Inayat Rasool ; Bhati, Ashok Kumar ; Bhattacharjee, Buddhadeb ; Bhom, Jihyun ; Bianchi, Livio ; Bianchi, Nicola ; Bianchin, Chiara ; Bielčík, Jaroslav ; Bielčíková, Jana ; Bilandzic, Ante ; Bjelogrlic, Sandro ; Blanco, Fernando ; Blau, Dmitry S. ; Blume, Christoph ; Bock, Friederike ; Bogdanov, Alexey A. ; Bøggild, Hans ; Bogolyubskiy, Mikhail ; Boehmer, Felix Valentin ; Boldizsar, Laszlo ; Bombara, Marek ; Book, Julian ; Borel, Herve ; Borissov, Alexander ; Bossú, Francesco ; Botje, Michiel ; Botta, Elena ; Boettger, Stefan ; Braun-Munzinger, Peter ; Bregant, Marco ; Breitner, Timo ; Broker, Theo Alexander ; Browning, Tyler Allen ; Broz, Michal ; Bruna, Elena ; Bruno, Giuseppe Eugenio ; Budnikov, Dmitry ; Büsching, Henner ; Bufalino, Stefania ; Bunčić, Predrag ; Busch, Oliver ; Buthelezi, Edith Zinhle ; Caffarri, Davide ; Cai, Xu ; Caines, Helen Louise ; Calero Diaz, Liliet ; Caliva, Alberto ; Calvo Villar, Ernesto ; Camerini, Paolo ; Carena, Francesco ; Carena, Wisla ; Castillo Castellanos, Javier Ernesto ; Casula, Ester Anna Rita ; Catanescu, Vasile Ioan ; Cavicchioli, Costanza ; Ceballos Sanchez, Cesar ; Čepila, Jan ; Cerello, Piergiorgio ; Chang, Beomsu ; Chapeland, Sylvain ; Charvet, Jean-Luc Fernand ; Chattopadhyay, Subhasis ; Chattopadhyay, Sukalyan ; Chelnokov, Volodymyr ; Cherney, Michael Gerard ; Cheshkov, Cvetan Valeriev ; Cheynis, Brigitte ; Chibante Barroso, Vasco Miguel ; Chinellato, David Dobrigkeit ; Chochula, Peter ; Chojnacki, Marek ; Choudhury, Subikash ; Christakoglou, Panagiotis ; Christensen, Christian Holm ; Christiansen, Peter L. ; Chujo, Tatsuya ; Chung, Suh-Urk ; Cicalò, Corrado ; Cifarelli, Luisa ; Cindolo, Federico ; Cleymans, Jean Willy Andre ; Colamaria, Fabio Filippo ; Colella, Domenico ; Collu, Alberto ; Colocci, Manuel ; Conesa Balbastre, Gustavo ; Conesa Del Valle, Zaida ; Connors, Megan Elizabeth ; Contreras Nuno, Jesus Guillermo ; Cormier, Thomas Michael ; Corrales Morales, Yasser ; Cortese, Pietro ; Cortes Maldonado, Ismael ; Cosentino, Mauro Rogerio ; Costa, Filippo ; Crochet, Philippe ; Cruz Albino, Rigoberto ; Cuautle Flores, Eleazar ; Cunqueiro Mendez, Leticia ; Dainese, Andrea ; Dang, Ruina ; Danu, Andrea ; Das, Debasish ; Das, Indranil ; Das, Kushal ; Das, Supriya ; Dash, Ajay Kumar ; Dash, Sadhana ; De, Sudipan ; Delagrange, Hugues ; Deloff, Andrzej ; Denes, Ervin Sandor ; D’Erasmo, Ginevra ; De Caro, Annalisa ; De Cataldo, Giacinto ; Cuveland, Jan de ; De Falco, Alessandro ; De Gruttola, Daniele ; De Marco, Nora ; De Pasquale, Salvatore ; De Rooij, Raoul Stefan ; Diaz Corchero, Miguel Angel ; Dietel, Thomas ; Dillenseger, Pascal ; Divià, Roberto ; Di Bari, Domenico ; Di Liberto, Sergio ; Di Mauro, Antonio ; Di Nezza, Pasquale ; Djuvsland, Øystein ; Dobrin, Alexandru Florin ; Dobrowolski, Tadeusz Antoni ; Domenicis Gimenez, Diogenes ; Donigus, Benjamin ; Dordic, Olja ; Dorheim, Sverre ; Dubey, Anand Kumar ; Dubla, Andrea ; Ducroux, Laurent ; Dupieux, Pascal ; Dutt Mazumder, Abhee Kanti ; Hilden, Timo Eero ; Ehlers Iii, Raymond James ; Elia, Domenico ; Engel, Heiko ; Erazmus, Barbara Ewa ; Erdal, Hege Austrheim ; Eschweiler, Dominic ; Espagnon, Bruno ; Esposito, Marco ; Estienne, Magali Danielle ; Esumi, ShinIchi ; Evans, David ; Evdokimov, Sergey ; Fabris, Daniela ; Faivre, Julien ; Falchieri, Davide ; Fantoni, Alessandra ; Fasel, Markus ; Fehlker, Dominik ; Feldkamp, Linus ; Felea, Daniel ; Feliciello, Alessandro ; Feofilov, Grigory ; Ferencei, Jozef ; Fernández Téllez, Arturo ; Gonzalez Ferreiro, Elena ; Ferretti, Alessandro ; Festanti, Andrea ; Figiel, Jan ; Figueredo, Marcel Araujo Silva ; Filchagin, Sergey ; Finogeev, Dmitry ; Fionda, Fiorella Maria Celeste ; Fiore, Enrichetta Maria ; Floratos, Emmanouil ; Floris, Michele ; Foertsch, Siegfried Valentin ; Foka, Panagiota ; Fokin, Sergey ; Fragiacomo, Enrico ; Francescon, Andrea ; Frankenfeld, Ulrich ; Fuchs, Ulrich ; Furget, Christophe ; Fusco Girard, Mario ; Gaardhoeje, Jens Joergen ; Gagliardi, Martino ; Gago Medina, Alberto Martín ; Gallio, Mauro ; Gangadharan, Dhevan Raja ; Ganoti, Paraskevi ; Gao, Chaosong ; Garabatos Cuadrado, Jose ; Garcia-Solis, Edmundo Javier ; Gargiulo, Corrado ; Garishvili, Irakli ; Gerhard, Jochen ; Germain, Marie ; Gheata, Andrei George ; Gheata, Mihaela ; Ghidini, Bruno ; Ghosh, Premomoy ; Ghosh, Sanjay Kumar ; Gianotti, Paola ; Giubellino, Paolo ; Gładysz-Dziaduś, Ewa ; Glässel, Peter ; Gómez Ramírez, Andrés ; González Zamora, Pedro ; Gorbunov, Sergey ; Görlich, Lidia Maria ; Gotovac, Sven ; Graczykowski, Łukasz Kamil ; Grelli, Alessandro ; Grigoras, Alina Gabriela ; Grigoraș, Costin ; Grigoryev, Vladislav ; Grigoryan, Ara ; Grigoryan, Smbat ; Grynyov, Borys ; Grion, Nevio ; Große-Oetringhaus, Jan Fiete ; Grossiord, Jean-Yves ; Grosso, Raffaele ; Guber, Fedor ; Guernane, Rachid ; Guerzoni, Barbara ; Guilbaud, Maxime Rene Joseph ; Gulbrandsen, Kristjan Herlache ; Gulkanyan, Hrant ; Gumbo, Mervyn ; Gunji, Taku ; Gupta, Anik ; Gupta, Ramni ; Khan, Kamal ; Haake, Rüdiger ; Haaland, Øystein Senneset ; Hadjidakis, Cynthia Marie ; Haiduc, Maria ; Hamagaki, Hideki ; Hamar, Gergö ; Hanratty, Luke David ; Hansen, Alexander ; Harris, John William ; Hartmann, Helvi ; Harton, Austin Vincent ; Hatzifotiadou, Despina ; Hayashi, Shinichi ; Heckel, Stefan Thomas ; Heide, Markus ; Helstrup, Håvard ; Herghelegiu, Andrei Ionut ; Herrera Corral, Gerardo Antonio ; Hess, Benjamin Andreas ; Hetland, Kristin Fanebust ; Hippolyte, Boris ; Hladkỳ, Jan ; Hristov, Peter ; Huang, Meidana ; Humanic, Thomas J. ; Hussain, Nur ; Hutter, Dirk ; Hwang, Dae Sung ; Ilkaev, Radiy ; Ilkiv, Iryna ; Inaba, Motoi ; Innocenti, Gian Michele ; Ionita, Costin ; Ippolitov, Mikhail ; Irfan, Muhammad ; Ivanov, Marian ; Ivanov, Vladimir ; Jacholkowski, Adam Wlodzimierz ; Jacobs, Peter Martin ; Jahnke, Cristiane ; Jang, Haeng Jin ; Janik, Malgorzata Anna ; Pahula Hewage, Sandun ; Jena, Chitrasen ; Jena, Satyajit ; Jiménez Bustamante, Raúl Tonatiuh ; Jones, Peter Graham ; Jung, Hyungtaik ; Jusko, Anton ; Kadyshevskiy, Vladimir ; Kalcher, Sebastian ; Kalinak, Peter ; Kalweit, Alexander Philipp ; Kamin, Jason Adrian ; Kang, Ju Hwan ; Kaplin, Vladimir ; Kar, Somnath ; Karasu Uysal, Ayben ; Karavichev, Oleg V. ; Karavicheva, Tatiana L. ; Karpechev, Evgeny ; Kebschull, Udo ; Keidel, Ralf ; Keijdener, Darius Laurens D. ; Khan, Mohammed Mohisin ; Khan, Palash ; Khan, Shuaib Ahmad ; Khanzadeev, Alexei ; Kharlov, Yury ; Kileng, Bjarte ; Kim, Beomkyu ; Kim, Do Won ; Kim, Dong Jo ; Kim, Jinsook ; Kim, Mimae ; Kim, Minwoo ; Kim, Se Yong ; Kim, Taesoo ; Kirsch, Stefan ; Kisel, Ivan ; Kiselev, Sergej N. ; Kisiel, Adam Ryszard ; Kiss, Gabor ; Klay, Jennifer Lynn ; Klein, Jochen ; Klein-Bösing, Christian ; Kluge, Alexander ; Knichel, Michael Linus ; Knospe, Anders Garritt ; Kobdaj, Chinorat ; Varga-Kofarago, Monika ; Köhler, Markus Konrad ; Kollegger, Thorsten ; Kolozhvari, Anatoly ; Kondratev, Valerii ; Kondratyeva, Natalia ; Konevskikh, Artem ; Kovalenko, Vladimir ; Kowalski, Marek ; Kox, Serge ; Koyithatta Meethaleveedu, Greeshma ; Kral, Jiří ; Králik, Ivan ; Kravčáková, Adela ; Křelina, Michal ; Kretz, Matthias ; Krivda, Marian ; Krizek, Filip ; Kryshen, Evgeny ; Krzewicki, Mikolaj ; Kucera, Vit ; Kucheryaev, Yury ; Kugathasan, Thanushan ; Kuhn, Christian Claude ; Kuijer, Paulus Gerardus ; Kulakov, Igor ; Kumar, Jitendra ; Kurashvili, Podist ; Kurepin, Alexander ; Kurepin, Alexey B. ; Kuryakin, Alexey ; Kushpil, Svetlana ; Kweon, Min Jung ; Kwon, Youngil ; Ladron de Guevara, Pedro ; Lagana Fernandes, Caio ; Lakomov, Igor ; Langoy, Rune ; Lara Martinez, Camilo Ernesto ; Lardeux, Antoine Xavier ; Lattuca, Alessandra ; La Pointe, Sarah Louise ; La Rocca, Paola ; Lea, Ramona ; Leardini, Lucia ; Lee, Graham Richard ; Legrand, Iosif ; Lehnert, Joerg Walter ; Lemmon, Roy Crawford ; Lenti, Vito ; Leogrande, Emilia ; Leoncino, Marco ; Leon Monzon, Ildefonso ; Lévai, Peter ; Li, Shuang ; Lien, Jørgen André ; Lietava, Roman ; Lindal, Svein ; Lindenstruth, Volker ; Lippmann, Christian ; Lisa, Michael A. ; Ljunggren, Hans Martin ; Lodato, Davide Francesco ; Lønne, Per-Ivar ; Loggins, Vera Renee ; Loginov, Vitaly ; Lohner, Daniel ; Loizides, Constantinos ; Lopez, Xavier Bernard ; López Torres, Ernesto ; Lu, Xianguo ; Lüttig, Philipp ; Lunardon, Marcello ; Luparello, Grazia ; Ma, Rongrong ; Maevskaya, Alla ; Mager, Magnus ; Mahapatra, Durga Prasad ; Mahmood, Sohail Musa ; Maire, Antonin ; Majka, Richard Daniel ; Malaev, Mikhail ; Maldonado Cervantes, Ivonne Alicia ; Malinina, Liudmila ; Mal’Kevich, Dmitry ; Malzacher, Peter ; Mamonov, Alexander ; Manceau, Loic Henri Antoine ; Manko, Vladislav ; Manso, Franck ; Manzari, Vito ; Marchisone, Massimiliano ; Mareš, Jiří ; Margagliotti, Giacomo Vito ; Margotti, Anselmo ; Marin, Ana Maria ; Markert, Christina ; Marquard, Marco ; Martashvili, Irakli ; Martin, Nicole Alice ; Martinengo, Paolo ; Martínez Hernández, Mario Iván ; García Martínez, Ginés ; Martin Blanco, Javier ; Martynov, Yevgen ; Mas, Alexis Jean-Michel ; Masciocchi, Silvia ; Masera, Massimo ; Masoni, Alberto ; Massacrier, Laure Marie ; Mastroserio, Annalisa ; Matyja, Adam Tomasz ; Mayer, Christoph ; Mazer, Joel Anthony ; Mazzoni, Alessandra Maria ; Meddi, Franco ; Menchaca-Rocha, Arturo Alejandro ; Mercado Pérez, Jorge ; Meres, Michal ; Miake, Yasuo ; Mikhaylov, Konstantin ; Milano, Leonardo ; Milošević, Jovan ; Mischke, André ; Mishra, Aditya Nath ; Miśkowiec, Dariusz Czesław ; Mitra, Jubin ; Mitu, Ciprian Mihai ; Mlynarz, Jocelyn ; Mohammadi, Naghmeh ; Mohanty, Bedangadas ; Molnar, Levente ; Montaño Zetina, Luis Manuel ; Montes Prado, Esther ; Morando, Maurizio ; Godoy, Denise Aparecida Moreira de ; Moretto, Sandra ; Morreale, Astrid ; Morsch, Andreas ; Muccifora, Valeria ; Mudnic, Eugen ; Muhlheim, Daniel ; Muhuri, Sanjib ; Mukherjee, Maitreyee ; Muller, Hans ; Gameiro Munhoz, Marcelo ; Murray, Sean ; Musa, Luciano ; Musinsky, Jan ; Nandi, Basanta Kumar ; Nania, Rosario ; Nappi, Eugenio ; Nattrass, Christine ; Nayak, Kishora ; Nayak, Tapan Kumar ; Nazarenko, Sergey ; Nedosekin, Alexander ; Nicassio, Maria ; Niculescu, Mihai ; Nielsen, Borge Svane ; Nikolaev, Sergey ; Nikulin, Sergey ; Nikulin, Vladimir ; Nilsen, Bjorn Steven ; Noferini, Francesco ; Nomokonov, Petr V. ; Nooren, Gerardus ; Norman, Jaime ; Nyanin, Alexander ; Nystrand, Joakim Ingemar ; Oeschler, Helmut ; Oh, Saehanseul ; Oh, Sun Kun ; Okatan, Ali ; Oláh, László ; Oleniacz, Janusz ; Silva, Antonio Carlos Oliveira da ; Onderwaater, Jacobus ; Oppedisano, Chiara ; Ortiz Velasquez, Antonio ; Oskarsson, Anders Nils Erik ; Otwinowski, Jacek Tomasz ; Oyama, Ken ; Özdemir, Mahmut ; Sahoo, Pragati ; Pachmayer, Yvonne C. ; Pachr, Milos ; Pagano, Paola ; Paic, Guy ; Painke, Florian ; Pajares Vales, Carlos ; Pal, Susanta Kumar ; Palmeri, Armando ; Pant, Divyash ; Papikyan, Vardanush ; Pappalardo, Giuseppe Salvatore ; Pareek, Pooja ; Park, WooJin ; Parmar, Sonia ; Passfeld, Annika ; Patalakha, Dmitry ; Paticchio, Vincenzo ; Paul, Biswarup ; Pawlak, Tomasz Jan ; Peitzmann, Thomas ; Pereira da Costa, Hugo Denis Antonio ; Pereira De Oliveira Filho, Elienos ; Peresunko, Dmitry Yurevich ; Pérez Lara, Carlos Eugenio ; Pesci, Alessandro ; Peskov, Vladimir ; Pestov, Yury N. ; Petráček, Vojtech ; Petran, Michal ; Petris, Mariana ; Petrovici, Mihai A. ; 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Schwarz, Kilian Eberhard ; Schweda, Kai ; Scioli, Gilda ; Scomparin, Enrico ; Scott, Rebecca Michelle ; Segato, Gianfranco ; Seger, Janet Elizabeth ; Sekiguchi, Yuko ; Selyuzhenkov, Ilya ; Seo, Jeewon ; Serradilla Rodriguez, Eulogio ; Sevcenco, Adrian ; Shabetai, Alexandre ; Shabratova, Galina ; Shahoyan, Ruben ; Shangaraev, Artem ; Sharma, Natasha ; Sharma, Satish ; Shigaki, Kenta ; Shtejer Diaz, Katherin ; Sibiryak, Yury ; Siddhanta, Sabyasachi ; Siemiarczuk, Teodor ; Silvermyr, David Olle Rickard ; Silvestre, Catherine Micaela ; Simatovic, Goran ; Singaraju, Rama Narayana ; Singh, Ranbir ; Singha, Subhash ; Singhal, Vikas ; Sinha, Bikash ; Sarkar - Sinha, Tinku ; Sitar, Branislav ; Sitta, Mario ; Skaali, Toralf Bernhard ; Skjerdal, Kyrre ; Slupecki, Maciej ; Smirnov, Nikolai ; Snellings, Raimond ; Soegaard, Carsten ; Soltz, Ron ; Song, Jihye ; Song, Myunggeun ; Soramel, Francesca ; Sorensen, Soren Pontoppidan ; Spacek, Michal ; Spiriti, Eleuterio ; Sputowska, Iwona Anna ; Spyropoulou-Stassinaki, Martha ; 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Wang, Yifei ; Watanabe, Daisuke ; Weber, Michael ; Wessels, Johannes P. ; Westerhoff, Uwe ; Wiechula, Jens ; Wikne, Jon ; Wilde, Martin ; Wilk, Grzegorz Andrzej ; Wilkinson, Jeremy John ; Williams, M. Crispin S. ; Windelband, Bernd ; Winn, Michael ; Yaldo, Chris G ; Yamaguchi, Yorito ; Yang, Hongyan ; Yang, Ping ; Yang, Shiming ; Yano, Satoshi ; Yasnopolskiy, Stanislav ; Yi, Jungyu ; Yin, Zhongbao ; Yoo, In-Kwon ; Yushmanov, Igor ; Zaccolo, Valentina ; Zach, Cenek ; Zaman, Ali ; Zampolli, Chiara ; Zaporozhets, Sergey ; Zarochentsev, Andrey ; Závada, Petr ; Zavyalov, Nikolay ; Zbroszczyk, Hanna Paulina ; Zgura, Sorin Ion ; Zhalov, Mikhail ; Zhang, Haitao ; Zhang, Xiaoming ; Zhang, Yonghong ; Zhao, Chengxin ; Zhigareva, Natalia ; Zhou, Daicui ; Zhou, Fengchu ; Zhou, You ; Zhou, Zhuo ; Zhu, Hongsheng ; Zhu, Jianhui ; Zhu, Xiangrong ; Zichichi, Antonino ; Zimmermann, Alice ; Zimmermann, Markus ; Zinovjev, Gennady M. ; Zoccarato, Yannick Denis ; Zyzak, Maksym
The ALICE collaboration at the LHC reports measurement of the inclusive production cross section of electrons from semi-leptonic decays of beauty hadrons with rapidity |y|<0.8 and transverse momentum 1<pT<10 GeV/c, in pp collisions at s√= 2.76 TeV. Electrons not originating from semi-electronic decay of beauty hadrons are suppressed using the impact parameter of the corresponding tracks. The production cross section of beauty decay electrons is compared to the result obtained with an alternative method which uses the distribution of the azimuthal angle between heavy-flavour decay electrons and charged hadrons. Perturbative QCD calculations agree with the measured cross section within the experimental and theoretical uncertainties. The integrated visible cross section, σb→e=3.47±0.40(stat)+1.12−1.33(sys)±0.07(norm)μb, was extrapolated to full phase space using Fixed Order plus Next-to-Leading Log (FONLL) predictions to obtain the total bb¯ production cross section, σbb¯=130±15.1(stat)+42.1−49.8(sys)+3.4−3.1(extr)±2.5(norm)±4.4(BR)μb.
Przygoda, Witold ; Adamczewski-Musch, Jörn ; Arnold, Oliver Werner ; Atomssa, Ermias T. ; Behnke, Claudia ; Berger-Chen, Jia-Chii ; Biernat, Jacek ; Blanco, Alberto ; Blume, Christoph ; Böhmer, Michael ; Bordalo, Paula ; Chernenko, Sergey P. ; Deveaux, Christina Anna ; Dybczak, Adrian ; Epple, Eliane ; Fabbietti, Laura ; Fateev, Oleg ; Fonte, Paulo ; Franco, Celso ; Friese, Jürgen ; Fröhlich, Ingo ; Galatyuk, Tetyana ; Garzón, Juan A. ; Gill, Katharina ; Golubeva, Marina ; Guber, Fedor ; Gumberidze, Malgorzata ; Harabasz, Szymon ; Hennino, Thierry ; Hlaváč, Stanislav ; Höhne, Claudia ; Holzmann, Romain ; Ierusalimov, Alexander P. ; Ivashkin, Alexander ; Jurkovič, Martin ; Kämpfer, Burkhard ; Karavicheva, Tatiana L. ; Kardan, Behruz ; Koenig, Ilse ; Koenig, Wolfgang ; Kolb, Burkhard W. ; Korcyl, Grzegorz ; Kornakov, Georgy ; Kotte, Roland ; Krása, Antonin ; Krebs, Erik ; Kuc, Hubert ; Kugler, Andrej ; Kunz, Tobias ; Kurepin, Alexander ; Kurilkin, Aleksey K. ; Kurilkin, Pavel ; Ladygin, Vladimir P. ; Lalik, Rafał Tomasz ; Lapidus, Kirill ; Lebedev, Alexei ; Lopes, Luis Alberto Vieira ; Lorenz, Manuel ; Mahmoud, Tariq ; Maier, Ludwig W. ; Mangiarotti, Alessio ; Markert, Jochen ; Metag, Volker ; Michel, Jan ; Müntz, Christian ; Münzer, Robert Helmut ; Naumann, Lothar ; Palka, Marek ; Parpottas, Yannis ; Pechenov, Vladimir ; Pechenova, Olga ; Petousis, Vlasios ; Pietraszko, Jerzy ; Ramstein, Béatrice ; Rehnisch, Laura ; Reshetin, Andrey ; Rost, Adrian ; Rustamov, Anar ; Sadovsky, Alexander ; Salabura, Piotr ; Scheib, Timo ; Schmidt-Sommerfeld, Korbinian ; Schuldes, Heidi ; Sellheim, Patrick ; Siebenson, Johannes Stephan ; Silva, Luis ; Sobolev, Yuri G. ; Spataro, Stefano ; Ströbele, Herbert ; Stroth, Joachim ; Strzempek, Paweł ; Sturm, Christian Thomas ; Svoboda, Ondřej ; Tarantola Peloni, Attilio ; Teilab, Khaled ; Tlustý, Pavel ; Traxler, Michael ; Tsertos, Haralabos ; Vasiliev, Taras A. ; Wagner, Vladimir ; Wendisch, Christian ; Wirth, Joana ; Wüstenfeld, Jörn ; Zanevsky, Yuri V. ; Zumbruch, Peter W.
n this paper we report on the investigation of baryonic resonance production in proton-proton collisions at the kinetic energies of 1.25 GeV and 3.5 GeV, based on data measured with HADES. Exclusive channels npπ+ and ppπ0 as well as ppe+e− were studied simultaneously in the framework of a one-boson exchange model. The resonance cross sections were determined from the one-pion channels for Δ(1232) and N(1440) (1.25 GeV) as well as further Δ and N* resonances up to 2 GeV/c2 for the 3.5 GeV data. The data at 1.25 GeV energy were also analysed within the framework of the partial wave analysis together with the set of several other measurements at lower energies. The obtained solutions provided the evolution of resonance production with the beam energy, showing a sizeable non-resonant contribution but with still dominating contribution of Δ(1232)P33. In the case of 3.5 GeV data, the study of the ppe+e− channel gave the insight on the Dalitz decays of the baryon resonances and, in particular, on the electromagnetic transition form-factors in the time-like region. We show that the assumption of a constant electromagnetic transition form-factors leads to underestimation of the yield in the dielectron invariant mass spectrum below the vector mesons pole. On the other hand, a comparison with various transport models shows the important role of intermediate ρ production, though with a large model dependency. The exclusive channels analysis done by the HADES collaboration provides new stringent restrictions on the parameterizations used in the models.