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Odyniec, Grazyna Janina ; Afanasiev, Sergey V. ; Alber, Thomas ; Appelshäuser, Harald ; Bächler, Joachim ; Bailey, Stephen John ; Barnby, Lee Stuart ; Bartke, Jerzy ; Białkowska, Helena ; Blyth, Charles O. ; Bock, Rudolf ; Bormann, Christian ; Brady, Franklin Paul ; Brockmann, Robert ; Buncic, Nenad ; Bunčić, Predrag ; Caines, Helen Louise ; Cebra, Daniel A. ; Chan, P. ; Cooper, Glenn E. ; Cramer, John G. ; Cramer, Pauline B. ; Csató, Péter ; Dietz, Oliver ; Dunn, Jason ; Eckardt, Volker ; Eckhardt, Frank ; Ferguson, M. I. ; Fischer, Hans Gerhard ; Flierl, Dominik Bernhard ; Fodor, Zoltán ; Foka, Panagiota ; Freund, Peter ; Friese, Volker ; Fuchs, M. ; Gabler, Frank ; Gál, József ; Gaździcki, Marek ; Gładysz-Dziaduś, Ewa ; Grebieszkow, Jaroslaw ; Günther, Jörg ; Harris, John W. ; Hegyi, Sándor ; Henkel, Torsten ; Hill, L. A. ; Huang, Isaac ; Howe, Mark A. ; Hümmler, Holm Gero ; Igo, George J. ; Irmscher, Detlef ; Jacobs, Peter Martin ; Jones, Peter Graham ; Kadija, Krešo ; Kolesnikov, Vadim I. ; Konashenok, Anton ; Kowalski, Marek ; Lasiuk, Brian ; Lévai, Péter ; Malakhov, Aleksandr I. ; Margetis, Spyridon ; Markert, Christina ; Melkumov, Georgy L. ; Mock, Andreas ; Molnár, József ; Nelson, John M. ; Pálla, Gabriella ; Panagiotou, Apostolos D. ; Petridis, Athanasios ; Piper, Andreas ; Porter, R. Jefferson ; Poskanzer, Arthur M. ; Poziombka, Stefan ; Prindle, Duncan J. ; Pühlhofer, Falk ; Rauch, Wolfgang Hans ; Reid, Jeffrey G. ; Renfordt, Rainer Arno Ernst ; Retyk, Waldemar ; Ritter, Hans Georg ; Röhrich, Dieter ; Roland, Christof ; Roland, Gunther ; Rudolph, Heinrich ; Rybicki, Andrzej ; Sakrejda, Iwona ; Sandoval, Andres ; Sann, Hans ; Semenov, Alexei Yu. ; Schäfer, Erich ; Schmischke, Dirk ; Schmitz, Norbert ; Schönfelder, Stefan ; Seyboth, Peter ; Seyerlein, Jürgen ; Siklér, Ferenc ; Skrzypczak, Ewa ; Squier, Gordon Thomas Anderson ; Stock, Reinhard ; Ströbele, Herbert ; Szentpétery, Imre ; Sziklai, János ; Toy, Milton Y. ; Trainor, Thomas A. ; Trentalange, Stephen ; Ullrich, Thomas ; Vassiliou, Maria ; Vesztergombi, György ; Vranić, Danilo ; Wang, Feipeng ; Weerasundara, Dhammika D. ; Wenig, Siegfried ; Whitten, Charles A. ; Wienold, Thomas ; Wood, Lindsay ; Yates, Tim A. ; Zimányi, József ; Zhu, Xue-Zhou ; Zybert, Ryszard
Using the NA49 main TPC, the central production of hyperons has been measured in CERN SPS Pb - Pb collisions at 158 GeV c-1. The preliminary ratio, studied at 2.0 < y < 2.6 and 1 < pT < 3 GeV c-1, equals ~ (13 ± 4)% (systematic error only). It is compatible, within errors, with the previously obtained ratios for central S + S [1], S + W [2], and S + Au [3] collisions. The fit to the transverse momentum distribution resulted in an inverse slope parameter T of 297 MeV. At this level of statistics we do not see any noticeable enhancement of hyperon production with the increased volume (and, possibly, degree of equilibration) of the system from S + S to Pb + Pb. This result is unexpected and counterintuitive, and should be further investigated. If confirmed, it will have a significant impact on our understanding of mechanisms leading to the enhanced strangeness production in heavy-ion collisions.
Magdy Abdelwahab Abdelrahman, Niseem ; Adamczyk, Leszek ; Adkins, J. Kevin ; Agakishiev, Geydar ; Aggarwal, Madan Mohan ; Ahammed, Zubayer ; Alekseev, Igor G. ; Alford, J. ; Anson, Christopher Daniel ; Aparin, Alexey ; Arkhipkin, Dmitry A. ; Aschenauer, Elke Caroline ; Averichev, Georgy S. ; Banerjee, A. ; Beavis, Dana Richard ; Bellwied, Rene ; Bhasin, Anju ; Bhati, Ashok Kumar ; Bhattarai, P. ; Bielčík, Jaroslav ; Bielčíková, Jana ; Bland, Leslie C. ; Bordyuzhin, Igor G. ; Borowski, W. ; Bouchet, Jonathan ; Brandin, Andrei V. ; Brovko, Samantha G. ; Bültmann, Stephen L. ; Bunzarov, Ivan ; Burton, T.P. ; Butterworth, Joseph ; Caines, Helen Louise ; Calderón de la Barca Sánchez, Manuel ; Campbell, J.M. ; Cebra, Daniel A. ; Cendejas, R. ; Cervantes, M.C. ; Chaloupka, Petr ; Chang, Z. ; Chattopadhyay, S. ; Chen, H.F. ; Chen, J.H. ; Chen, L. ; Cheng, J. ; Cherney, Michael Gerard ; Chikanian, Alexei ; Christie, William ; Codrington, M.J.M. ; Contin, Giacomo ; Cramer, John G. ; Crawford, Henry J. ; Cui, X. ; Das, Supriya ; Davila Leyva, A. ; De Silva, L.C. ; Debbe, R.R. ; Dedovič, Tatiana G. ; Deng, J. ; Derevschikov, Anatoly A. ; Souza, Rafael Derradi de ; di Ruzza, Benedetto ; Didenko, Lidia ; Dilks, Christopher ; Ding, F. ; Djawotho, P. ; Dong, X. ; Drachenberg, James Lucus ; Draper, James E. ; Du, C.M. ; Dunkelberger, Lloyd Edward ; Dunlop, James C. ; Efimov, Leonid G. ; Engelage, Jon M. ; Engle, K.S. ; Eppley, Geary Wareham ; Eun, L. ; Evdokimov, Olga Y. ; Eyser, Kjeld Oleg ; Fatemi, Renee H. ; Fazio, Salvatore ; Fedorišin, Jan ; Filip, Peter ; Fisyak, Yuri V. ; Flores, C.E. ; Gagliardi, Carl A. ; Gangadharan, Dhevan Raja ; Garand, David ; Geurts, Frank ; Gibson, Adam ; Girard, M. ; Gliske, S. ; Greiner, Leo Clifford ; Grosnick, David P. ; Gunarathne, D.S. ; Guo, Y. ; Gupta, Anik ; Gupta, S. ; Guryn, Włodzimierz ; Haag, B. ; Hamed, Ahmed M. ; Han, L-X. ; Haque, R. ; Harris, John W. ; Heppelmann, Steven Francis ; Hirsch, Andrew S. ; Hoffmann, Gerald W. ; Hofman, D.J. ; Horvat, S. ; Huang, B. ; Huang, H.Z. ; Huang, X. ; Huck, Patrick ; Humanic, Thomas J. ; Igo, George J. ; Jacobs, William W. ; Jang, H. ; Judd, Eleanor G. ; Kabana, Sonia ; Kalinkin, Dmitry ; Kang, K. ; Kauder, Kolja ; Ke, Hongwei ; Keane, Declan ; Kechechyan, Armen ; Kesich, A. ; Khan, Z.H. ; Kikola, D.P. ; Kisel, Ivan ; Kisiel, Adam Ryszard ; Koetke, Donald D. ; Kollegger, Thorsten ; Konzer, J. ; Koralt, I. ; Kosarzewski, Leszek Krzysztof ; Kotchenda, L. ; Kraishan, A.F. ; Kravtsov, Peter ; Krueger, Keith William ; Kulakov, Igor ; Kumar, Lokesh ; Kycia, R.A. ; Lamont, Matthew A. C. ; Landgraf, Jeffery M. ; Landry, K.D. ; Lauret, Jerome ; Lebedev, Alexei ; Lednicky, Richard ; Lee, J.H. ; Li, C. ; Li, W. ; Li, Xiaomei ; Li, Xiaomei ; Li, Y. ; Li, Z.M. ; Lisa, Michael A. ; Liu, F. ; Ljubicic, Tonko A. ; Llope, William Joseph ; Lomnitz, Michael ; Longacre, Ronald S. ; Luo, X. ; Ma, G.L. ; Ma, Yu-Gang ; Mahapatra, D.P. ; Majka, Richard Daniel ; Margetis, Spyridon ; Markert, Christina ; Masui, H. ; Matis, Howard S. ; McDonald, Daniel ; McShane, Tom S. ; Minaev, Nikolai G. ; Mioduszewski, Saskia ; Mohanty, Bedangadas ; Mondal, Mriganka Mouli ; Morozov, Dmitry A. ; Mustafa, M.K. ; Nandi, Basanta Kumar ; Nasim, Md. ; Nayak, Tapan Kumar ; Nelson, John M. ; Nigmatkulov, Grigory A. ; Nogach, Larisa V. ; Noh, S.Y. ; Novak, J. ; Nurušev, Sandibek B. ; Odyniec, Grazyna Janina ; Ogawa, Akio ; Oh, Kunsu ; Ohlson, Alice ; Okorokov, Vitaly A. ; Oldag, E.W. ; Olvitt, D.L. ; Page, Brian S. ; Pan, Y.X. ; Pandit, Y. ; Panebratsev, Yuri ; Pawlak, Tomasz Jan ; Pawlik, Bogdan ; Pei, Hua ; Perkins, Chris ; Pile, P. ; Planinic, Mirko ; Pluta, Jan Marian ; Poljak, Nikola ; Poniatowska, K. ; Porter, Jeffrey Brent ; Poskanzer, Arthur M. ; Pruthi, Navneet Kumar ; Przybycien, Mariusz ; Putschke, Jörn H. ; Qiu, H. ; Quintero, Amilkar ; Ramachandran, Suvarna ; Raniwala, Rashmi ; Raniwala, Sudhir ; Ray, Robert L. ; Riley, C.K. ; Ritter, Hans Georg ; Roberts, Jabus B. ; Rogačevskij, Oleg V. ; Romero, Juan L. ; Ross, J.F. ; Roy, Ankhi ; Ruan, Lijuan ; Rusnak, Jan ; Rusnakova, Olga ; Sahoo, Nihar Ranjan ; Sahu, Pradip Kumar ; Sakrejda, Iwona ; Salur, Sevil ; Sandacz, Andrzej ; Sandweiss, Jack H. ; Sangaline, Evan ; Sarkar, Amal ; Schambach, Joachim ; Scharenberg, Rolf Paul ; Schmah, Alexander ; Schmidke, William B. ; Schmitz, Norbert ; Seger, Janet Elizabeth ; Seyboth, Peter ; Shah, N. ; Shahaliev, Ehtiram ; Shanmuganathan, Prashanth V. ; Shao, M. ; Sharma, B. ; Shen, W.Q. ; Shi, S.S. ; Shou, Q.Y. ; Sichtermann, Ernst P. ; Šimko, Miroslav ; Skoby, M.J. ; Smirnov, Dmitri V. ; Smirnov, Nikolai ; Solanki, D. ; Sorensen, Paul Richard ; Spinka, Harold. M. ; Srivastava, Brijesh Kumar ; Stanislaus, T. D. Shirvel ; Stevens, J.R. ; Stock, Reinhard ; Strichanov, Michail Nikolaevič ; Stringfellow, Blair ; Šumbera, Michal ; Sun, X. ; Sun, X.M. ; Sun, Y. ; Sun, Z. ; Surrow, Bernd ; Svirida, Dmitry N. ; Symons, Timothy James MacNeil ; Szelezniak, M.A. ; Takahashi, Jun ; Tang, Aihong ; Tang, Zebo ; Tarnowsky, Terence J. ; Thomas, James H. ; Timmins, Anthony Robert ; Tlusty, David ; Tokarev, Mikhail V. ; Trentalange, Stephen ; Tribble, Robert E. ; Tribedy, Prithwish ; Trzeciak, Barbara Antonina ; Tsai, Oleg D. ; Turnau, J. ; Ullrich, Thomas ; Underwood, David G. ; Van Buren, Gene ; Nieuwenhuizen, Gerrit J. van ; Vandenbroucke, Maxence ; Vanfossen, Joseph A. ; Varma, Raghava ; Vasconcelos, Geraldo M. S. ; Vasiliev, Alexander Nikolaevich ; Vértesi, Róbert ; Videbæk, Flemming ; Viyogi, Yogendra P. ; Vokal, Stanislav ; Vossen, A. ; Wada, M. ; Wang, F. ; Wang, G. ; Wang, H. ; Wang, J.S. ; Wang, X.L. ; Wang, Y. ; Wang, Y. ; Webb, Grant ; Webb, Jason C. ; Westfall, Gary D. ; Wieman, Howard ; Wissink, Scott W. ; Wu, Y.F. ; Xiao, Z. ; Xie, W. ; Xin, K. ; Xu, H. ; Xu, J. ; Xu, N. ; Xu, Q.H. ; Xu, Y. ; Xu, Z. ; Yan, W. ; Yang, C. ; Yang, Y. ; Yang, Y. ; Ye, Z. ; Yepes, Pablo P. ; Yi, L. ; Yip, K. ; Yoo, In-Kwon ; Yu, N. ; Zbroszczyk, Hanna Paulina ; Zha, W. ; Zhang, J.B. ; Zhang, J.L. ; Zhang, S. ; Zhang, X.P. ; Zhang, Y. ; Zhang, Z.P. ; Zhao, F. ; Zhao, J. ; Zhong, C. ; Zhu, X. ; Zhu, Y.H. ; Zoulkarneeva, Youlia ; Zyzak, Maksym
A data-driven method was applied to Au+Au collisions at √sNN = 200 GeV made with the STAR detector at RHIC to isolate pseudorapidity distance η-dependent and η-independent correlations by using two- and four-particle azimuthal cumulant measurements. We identified a η-independent component of the correlation, which is dominated by anisotropic flow and flow fluctuations. It was also found to be independent of η within the measured range of pseudorapidity |η| < 1. In 20–30% central Au+Au collisions, the relative flow fluctuation was found to be 34%±2%(stat.)±3%(sys.) for particles with transverse momentum pT less than 2 GeV/c. The η-dependent part, attributed to nonflow correlations, is found to be 5% ± 2%(sys.) relative to the flow of the measured second harmonic cumulant at |η| > 0.7.
Bächler, Joachim ; Bartke, Jerzy ; Białkowska, Helena ; Bock, Rudolf ; Brockmann, Robert ; Bunčić, Predrag ; Chase, S. I. ; Derado, Ivan ; Eckardt, Volker ; Eschke, Jürgen ; Ferenc, Daniel ; Fleischmann, B. ; Foka, Panagiota ; Fuchs, Michael ; Gaździcki, Marek ; Gładysz-Dziaduś, Ewa ; Harris, John W. ; Heck, Wilfried ; Hoffmann, Matthias ; Jacobs, Peter Martin ; Kabana, Sonia ; Kadija, Krešo ; Keidel, Ralf ; Kosiec, Jacek ; Kowalski, Marek ; Kühmichel, Andreas ; Lahanas, Michael ; Lee, Jae-Yun ; Ljubičić, Ante ; Margetis, Spyridon ; Morse, Richard J. ; Nappi, Eugenio ; Odyniec, Grazyna Janina ; Paic, Guy ; Panagiotou, Apostolos D. ; Petridis, Athanasios ; Piper, Andreas ; Posa, Francesco ; Poskanzer, Arthur M. ; Pugh, Howel G. ; Pühlhofer, Falk ; Rai, Gulshan ; Rauch, Wolfgang Hans ; Renfordt, Rainer Arno Ernst ; Röhrich, Dieter ; Roland, Gunther ; Rothard, Hermann ; Runge, Kay ; Sandoval, Andres ; Schambach, Joachim ; Schmitz, Norbert ; Schmoetten, Emile ; Schneider, Ingo ; Seyboth, Peter ; Seyerlein, Jürgen ; Skrzypczak, Ewa ; Stefański, Piotr ; Stock, Reinhard ; Ströbele, Herbert ; Teitelbaum, Lawrence Paul ; Tincknell, Mark L. ; Tonse, Shaheen ; Vasileiadis, Georgios ; Vesztergombi, György ; Vranić, Danilo ; Wenig, Siegfried
The transverse momentum and rapidity distributions of negative hadrons and participant protons have been measured for central 32S+ 32S collisions at plab=200 GeV/c per nucleon. The proton mean rapidity shift < Delta y>~1.6 and mean transverse momentum <pT>~0.6 GeV/c are much higher than in pp or peripheral AA collisions and indicate an increase in the nuclear stopping power. All pT spectra exhibit similar source temperatures. Including previous results for K0s Lambda , and Lambda -bar, we account for all important contributions to particle production.
Antičić, Tome ; Baatar, B. ; Barna, Daniel ; Bartke, Jerzy ; Behler, Matthias ; Betev, Latchezar ; Białkowska, Helena ; Billimeier, Anja ; Blume, Christoph ; Boimska, Bożena ; Botje, Michiel ; Bracinik, Juraj ; Bramm, Roland ; Brun, René ; Bunčić, Predrag ; Černý, Vladimír ; Christakoglou, Panagiotis ; Chvala, Ondrej ; Cooper, Glenn E. ; Cramer, John G. ; Csató, Péter ; Dinkelaker, Peter ; Eckardt, Volker ; Filip, Peter ; Fischer, Hans Gerhard ; Fodor, Zoltán ; Foka, Panagiota ; Freund, Peter ; Friese, Volker ; Gál, József ; Gaździcki, Marek ; Georgopoulos, George ; Gładysz-Dziaduś, Ewa ; Hegyi, Sándor ; Höhne, Claudia ; Jacobs, Peter Martin ; Kadija, Krešo ; Karev, Alexandre ; Kolesnikov, Vadim I. ; Kollegger, Thorsten ; Korus, Robert ; Kowalski, Marek ; Kraus, Ingrid ; Kreps, Michal ; Leeuwen, Marco van ; Lévai, Péter ; Malakhov, Aleksandr I. ; Markert, Christina ; Mayes, Bill W. ; Melkumov, Georgy L. ; Meurer, Christine ; Mischke, André ; Mitrovski, Michael Kosta ; Molnár, József ; Mrówczyński, Stanislaw ; Pálla, Gabriella ; Panagiotou, Apostolos D. ; Perl, Katarzyna ; Petridis, Athanasios ; Pikna, Miroslav ; Pinsky, Lawrence ; Pühlhofer, Falk ; Reid, Jeffrey G. ; Renfordt, Rainer Arno Ernst ; Retyk, Waldemar ; Roland, Christof ; Roland, Gunther ; Rybczyński, Maciej ; Rybicki, Andrzej ; Sandoval, Andres ; Sann, Hans ; Schmitz, Norbert ; Seyboth, Peter ; Siklér, Ferenc ; Sitar, Branislav ; Skrzypczak, Ewa ; Stefanek, Grzegorz ; Stock, Reinhard ; Ströbele, Herbert ; Šuša, Tatjana ; Szentpétery, Imre ; Sziklai, János ; Trainor, Thomas A. ; Varga, Dezsö ; Vassiliou, Maria ; Veres, Gábor I. ; Vesztergombi, György ; Vranić, Danilo ; Wenig, Siegfried ; Wetzler, Alexander Albert ; Włodarczyk, Zbigniew ; Xu, Nu ; Yoo, In-Kwon ; Zaranek, Jacek ; Zimanyi, József
The transverse mass mt distributions for deuterons and protons are measured in Pb+Pb reactions near midrapidity and in the range 0<mt–m<1.0 (1.5) GeV/c2 for minimum bias collisions at 158A GeV and for central collisions at 40 and 80 A GeV beam energies. The rapidity density dn/dy, inverse slope parameter T and mean transverse mass <mt> derived from mt distributions as well as the coalescence parameter B2 are studied as a function of the incident energy and the collision centrality. The deuteron mt spectra are significantly harder than those of protons, especially in central collisions. The coalescence factor B2 shows three systematic trends. First, it decreases strongly with increasing centrality reflecting an enlargement of the deuteron coalescence volume in central Pb+Pb collisions. Second, it increases with mt. Finally, B2 shows an increase with decreasing incident beam energy even within the SPS energy range. The results are discussed and compared to the predictions of models that include the collective expansion of the source created in Pb+Pb collisions.
Alber, Thomas ; Bächler, Joachim ; Bartke, Jerzy ; Białkowska, Helena ; Bloomer, Matthew A. ; Bock, Rudolf ; Braithwaite, Wilfred J. ; Brinkmann, Dittmar ; Brockmann, Robert ; Bunčić, Predrag ; Chan, Phaikying ; Cramer, Pauline B. ; Cramer, John G. ; Derado, Ivan ; Eckardt, Volker ; Eschke, Jürgen ; Favuzzi, Cecilia ; Ferenc, Daniel ; Fleischmann, B. ; Foka, Panagiota ; Freund, Peter ; Fuchs, Michael ; Gaździcki, Marek ; Gładysz-Dziaduś, Ewa ; Harris, John W. ; Hoffman, Matthias ; Jacobs, Peter Martin ; Kabana, Sonia ; Kadija, Krešo ; Kosiec, Jacek ; Kowalski, Marek ; Kühmichel, Andreas ; Lahanas, Michael ; Lee, Jae-Yun ; Ljubičić, Ante ; Margetis, Spyridon ; Mitchell, Jeffery Thomas ; Morse, Richard J. ; Nappi, Eugenio ; Odyniec, Grazyna Janina ; Paić, Guy ; Panagiotou, Apostolos D. ; Petridis, Athanasios ; Piper, Andreas ; Posa, Francesco ; Poskanzer, Arthur M. ; Pühlhofer, Falk ; Rauch, Wolfgang Hans ; Renfordt, Rainer Arno Ernst ; Retyk, Waldemar ; Röhrich, Dieter ; Roland, Gunther ; Rothard, Hermann ; Runge, Kay ; Sandoval, Andres ; Schambach, Joachim ; Schmitz, Norbert ; Schmoetten, Emile ; Schneider, Ingo ; Seyboth, Peter ; Seyerlein, Jürgen ; Skrzypczak, Ewa ; Spinelli, Paolo ; Stefansky, Piotr ; Stock, Reinhard ; Ströbele, Herbert ; Trainor, Thomas A. ; Vasileiadis, Georgios ; Vassiliou, Maria ; Vranić, Danilo ; Wenig, Siegfried ; Wosiek, Barbara
The NA35 experiment has collected a high statistics set of momentum analyzed negative hadrons near and forward of midrapidity for central collisions of 200A GeV/c 32S+S, Cu, Ag, and Au. Using momentum space correlations to study the size of the source of particle production, the transverse source radii are found to decrease by ~40% at midrapidity and ~20% at forward rapidity while the longitudinal radius RL is found to decrease by ~50% as pT increases over the interval 50<pT<600 MeV/c. Calculations using a microscopic phase space approach (relativistic quantum molecular dynamics) reproduce the observed trends of the data. PACS: 25.75.+r
Alber, Thomas ; Bartke, Jerzy ; Białkowska, Helena ; Bloomer, Matthew A. ; Bock, Rudolf ; Braithwaite, Wilfred J. ; Brinkmann, Dittmar ; Brockmann, Robert ; Bunčić, Predrag ; Chan, Phaikying ; Chase, S. I. ; Cramer, Pauline B. ; Cramer, John G. ; Derado, Ivan ; Eberlein, Björn ; Eckardt, Volker ; Eschke, Jürgen ; Ferenc, Daniel ; Fleischmann, B. ; Foka, Panagiota ; Freund, Peter ; Fuchs, Michael ; Gładysz-Dziaduś, Ewa ; Harris, John W. ; Hoffmann, Matthias ; Jacobs, Peter Martin ; Kabana, Sonia ; Kadija, Krešo ; Kosiec, Jacek ; Kowalski, Marek ; Lahanas, Michael ; Lee, Jae-Yun ; Ljubicic, Ante Jr. ; Margetis, Spyridon ; Mitchell, Jeffery Thomas ; Morse, Richard J. ; Nappi, Eugenio ; Odyniec, Grazyna Janina ; Paic, Guy ; Panagiotou, Apostolos D. ; Petridis, Athanasios ; Piper, Andreas ; Posa, Francesco ; Poskanzer, Arthur M. ; Pugh, Howel G. ; Rai, Gulshan ; Rauch, Wolfgang Hans ; Renfordt, Rainer Arno Ernst ; Retyk, Waldemar ; Roland, Gunther ; Rothard, Hermann ; Runge, Kay ; Sandoval, Andres ; Schambach, Joachim ; Schmitz, Norbert ; Schmoetten, Emile ; Schneider, Ingo ; Sendelbach, Ralf ; Seyboth, Peter ; Seyerlein, Jürgen ; Skrzypczak, Ewa ; Stefansky, Piotr ; Teitelbaum, Lawrence Paul ; Tonse, Shaheen ; Trainor, Thomas A. ; Vasileiadis, Georgios ; Vassiliou, Maria ; Wenig, Siegfried ; Wensveen, Martinus ; Wosiek, Barbara
We present the measured correlation functions for pi+ pi-, pi- pi- and pi+ pi+ pairs in central S+Ag collisions at 200 GeV per nucleon. The Gamov function, which has been traditionally used to correct the correlation functions of charged pions for the Coulomb interaction, is found to be inconsistent with all measured correlation functions. Certain problems which have been dominating the systematic uncertainty of the correlation analysis are related to this inconsistency. It is demonstrated that a new Coulomb correction method, based exclusively on the measured correlation function for pi+ pi- pairs, may solve the problem.
Aduszkiewicz, Antoni ; Andronov, Evgeny V. ; Antičić, Tome ; Babkin, Vadim A. ; Baszczyk, Mateusz ; Bhosale, S. ; Blondel, A. ; Bogomilov, Mariyan ; Brandin, Andrei V. ; Bravar, Alessandro ; Bryliński, Wojciech ; Brzychczyk, Janusz ; Buryakov, M. ; Busygina, O. ; Bzdak, A. ; Cherif, H. ; Ćirković, M. ; Csanád, Máté ; Cybowska, J. ; Czopowicz, T. ; Damyanova, A. ; Davis, N. ; Deliyergiyev, M. ; Deveaux, Michael ; Dmitriev, A. ; Dominik, W. ; Dorosz, Piotr ; Dumarchez, J. ; Engel, Ralph ; Feofilov, Grigori A. ; Fields, L. ; Fodor, Zoltán ; Garibov, A. ; Gaździcki, Marek ; Golosov, Oleg ; Golovatyuk, V. ; Golubeva, Marina ; Grebieszkow, Katarzyna ; Guber, Fedor ; Haesler, A. ; Igolkin, Sergey N. ; Ilieva, Stoyanka ; Ivashkin, Alexander ; Johnson, S. R. ; Kadija, Krešo ; Kargin, N. ; Kashirin, E. ; Kiełbowicz, Mirosław ; Kireyeu, Viktar A. ; Klochkov, Viktor ; Kolesnikov, Vadim I. ; Kolev, D. ; Korzenev, A. ; Kovalenko, V. N. ; Kowalski, S. ; Koziel, Michal ; Krasnoperov, A. ; Kucewicz, Wojciech ; Kuich, M. ; Kurepin, Alexander ; Larsen, Dag Toppe ; László, A. ; Lazareva, Tatiana V. ; Lewicki, M. ; Łojek, K. ; Lyubushkin, V. V. ; Maćkowiak-Pawłowska, Maja ; Majka, Zbigniew ; Maksiak, Bartosz ; Malakhov, Aleksandr I. ; Marcinek, A. ; Marino, A. D. ; Marton, K. ; Mathes, H.-J. ; Matulewicz, Tomasz ; Matveev, V. ; Melkumov, Georgy L. ; Merzlaya, Anastasia O. ; Messerly, B. ; Mik, Łukasz ; Morozov, Sergey ; Mrówczyński, Stanislaw ; Nagai, Y. ; Naskręt, Michał ; Ozvenchuk, Vitalii ; Paolone, V. ; Petukhov, Oleg ; Płaneta, Roman ; Podlaski, P. ; Popov, B. A. ; Porfy, B. ; Posiadała-Zezula, M. ; Prokhorova, D. S. ; Pszczel, Damian ; Puławski, Szymon ; Puzović, Jovan ; Ravonel, M. ; Renfordt, Rainer Arno Ernst ; Röhrich, Dieter ; Rondio, E. ; Roth, M. ; Rumberger, Brant T. ; Rumyantsev, M. ; Rustamov, Anar ; Rybczyński, Maciej ; Rybicki, Andrzej ; Sadovsky, Alexander ; Schmidt, K. ; Selyuzhenkov, Ilya ; Seryakov, A. Yu. ; Seyboth, Peter ; Słodkowski, M. ; Staszel, P. ; Stefanek, Grzegorz ; Stepaniak, J. ; Strichanov, Michail Nikolaevič ; Ströbele, Herbert ; Šuša, Tatjana ; Taranenko, Arkadiy ; Tefelska, A. ; Tefelski, Dariusz ; Tereshchenko, V. ; Toia, Alberica ; Tsenov, R. ; Turko, L. ; Ulrich, R. ; Unger, M. ; Uzhva, Denis ; Valiev, F. F. ; Veberič, Darko ; Vechernin, V. V. ; Wickremasinghe, A. ; Włodarczyk, Zbigniew ; Wojcik, K. ; Wyszyński, Oskar ; Zimmerman, E. D. ; Zwaska, Robert
The production of Ξ(1321)− and Ξ¯¯¯¯(1321)+ hyperons in inelastic p+p interactions is studied in a fixed target experiment at a beam momentum of 158 GeV/c. Double differential distributions in rapidity y and transverse momentum pT are obtained from a sample of 33M inelastic events. They allow to extrapolate the spectra to full phase space and to determine the mean multiplicity of both Ξ− and Ξ¯¯¯¯+. The rapidity and transverse momentum spectra are compared to transport model predictions. The Ξ− mean multiplicity in inelastic p+p interactions at 158 GeV/c is used to quantify the strangeness enhancement in A+A collisions at the same centre-of-mass energy per nucleon pair.
Aduszkiewicz, Antoni ; Andronov, Evgeny V. ; Antičić, Tome ; Babkin, Vadim A. ; Baszczyk, Mateusz ; Bhosale, S. ; Blondel, A. ; Bogomilov, Mariyan ; Brandin, Andrei V. ; Bravar, Alessandro ; Bryliński, Wojciech ; Brzychczyk, Janusz ; Buryakov, M. ; Busygina, O. ; Bzdak, A. ; Cherif, H. ; Ćirković, M. ; Csanád, Máté ; Cybowska, J. ; Czopowicz, T. ; Damyanova, A. ; Davis, N. ; Deliyergiyev, M. ; Deveaux, Michael ; Dmitriev, A. ; Dominik, W. ; Dorosz, Piotr ; Dumarchez, J. ; Engel, Ralph ; Feofilov, Grigori A. ; Fields, L. ; Fodor, Zoltán ; Garibov, A. ; Gaździcki, Marek ; Golosov, Oleg ; Golovatyuk, V. ; Golubeva, Marina ; Grebieszkow, Katarzyna ; Guber, Fedor ; Haesler, A. ; Igolkin, Sergey N. ; Ilieva, Stoyanka ; Ivashkin, Alexander ; Johnson, S. R. ; Kadija, Krešo ; Kargin, N. ; Kashirin, E. ; Kiełbowicz, Mirosław ; Kireyeu, Viktar A. ; Klochkov, Viktor ; Kolesnikov, Vadim I. ; Kolev, D. ; Korzenev, A. ; Kovalenko, V. N. ; Kowalski, S. ; Koziel, Michal ; Krasnoperov, A. ; Kucewicz, Wojciech ; Kuich, M. ; Kurepin, Alexander ; Larsen, Dag Toppe ; László, A. ; Lazareva, Tatiana V. ; Lewicki, M. ; Łojek, K. ; Lyubushkin, V. V. ; Maćkowiak-Pawłowska, Maja ; Majka, Zbigniew ; Maksiak, Bartosz ; Malakhov, Aleksandr I. ; Marcinek, A. ; Marino, A. D. ; Marton, K. ; Mathes, H.-J. ; Matulewicz, Tomasz ; Matveev, V. ; Melkumov, Georgy L. ; Merzlaya, Anastasia O. ; Messerly, B. ; Mik, Łukasz ; Morozov, Sergey ; Mrówczyński, Stanislaw ; Nagai, Y. ; Naskręt, Michał ; Ozvenchuk, Vitalii ; Paolone, V. ; Petukhov, Oleg ; Płaneta, Roman ; Podlaski, P. ; Popov, B. A. ; Porfy, B. ; Posiadała-Zezula, M. ; Prokhorova, D. S. ; Pszczel, Damian ; Puławski, Szymon ; Puzović, Jovan ; Ravonel, M. ; Renfordt, Rainer Arno Ernst ; Röhrich, Dieter ; Rondio, E. ; Roth, M. ; Rumberger, Brant T. ; Rumyantsev, M. ; Rustamov, Anar ; Rybczyński, Maciej ; Rybicki, Andrzej ; Sadovsky, Alexander ; Schmidt, K. ; Selyuzhenkov, Ilya ; Seryakov, A. Yu. ; Seyboth, Peter ; Słodkowski, M. ; Staszel, P. ; Stefanek, Grzegorz ; Stepaniak, J. ; Strichanov, Michail Nikolaevič ; Ströbele, Herbert ; Šuša, Tatjana ; Taranenko, Arkadiy ; Tefelska, A. ; Tefelski, Dariusz ; Tereshchenko, V. ; Toia, Alberica ; Tsenov, R. ; Turko, L. ; Ulrich, R. ; Unger, M. ; Uzhva, Denis ; Valiev, F. F. ; Veberič, Darko ; Vechernin, V. V. ; Wickremasinghe, A. ; Włodarczyk, Zbigniew ; Wojcik, K. ; Wyszyński, Oskar ; Zimmerman, E. D. ; Zwaska, Robert
A measurement of charged hadron pair correlations in two-dimensional ηφ space is presented. The analysis is based on total 30 million central Be + Be collisions observed in the NA61/SHINE detector at the CERN SPS for incident beam momenta of 19A, 30A, 40A, 75A, and 150A GeV/c. Measurements were carried out for unlike-sign and like-sign charge hadron pairs independently. The C(η, φ) correlation functions were compared with results from a similar analysis on p + p interactions at similar beam momenta per nucleon. General trends of the backto-back correlations are similar in central Be + Be collisions and p + p interactions, but are suppressed in magnitude due to the increased combinatorial background. Predictions from the Epos and UrQMD models are compared to the measurements. Evolution of an enhancement around (η, φ) = (0, 0) with incident energy is observed in central Be + Be collisions. It is not predicted by both models and almost non-existing in proton–proton collisions at the same momentum per nucleon.
Aduszkiewicz, Antoni ; Andronov, Evgeny V. ; Antičić, Tome ; Babkin, Vadim A. ; Baszczyk, Mateusz ; Bhosale, S. ; Blondel, A. ; Bogomilov, Mariyan ; Brandin, Andrei V. ; Bravar, Alessandro ; Bryliński, Wojciech ; Brzychczyk, Janusz ; Buryakov, M. ; Busygina, O. ; Bzdak, A. ; Cherif, H. ; Ćirković, M. ; Csanád, Máté ; Cybowska, J. ; Czopowicz, T. ; Damyanova, A. ; Davis, N. ; Deliyergiyev, M. ; Deveaux, Michael ; Dmitriev, A. ; Dominik, W. ; Dorosz, Piotr ; Dumarchez, J. ; Engel, Ralph ; Feofilov, Grigori A. ; Fields, L. ; Fodor, Zoltán ; Garibov, A. ; Gaździcki, Marek ; Golosov, Oleg ; Golovatyuk, V. ; Golubeva, Marina ; Grebieszkow, Katarzyna ; Guber, Fedor ; Haesler, A. ; Igolkin, Sergey N. ; Ilieva, Stoyanka ; Ivashkin, Alexander ; Johnson, S. R. ; Kadija, Krešo ; Kargin, N. ; Kashirin, E. ; Kiełbowicz, Mirosław ; Kireyeu, Viktar A. ; Klochkov, Viktor ; Kolesnikov, Vadim I. ; Kolev, D. ; Korzenev, A. ; Kovalenko, V. N. ; Kowalski, S. ; Koziel, Michal ; Krasnoperov, A. ; Kucewicz, Wojciech ; Kuich, M. ; Kurepin, Alexander ; Larsen, Dag Toppe ; László, A. ; Lazareva, Tatiana V. ; Lewicki, M. ; Łojek, K. ; Lyubushkin, V. V. ; Maćkowiak-Pawłowska, Maja ; Majka, Zbigniew ; Maksiak, B. ; Malakhov, Aleksandr I. ; Marcinek, A. ; Marino, A. D. ; Marton, K. ; Mathes, H.-J. ; Matulewicz, Tomasz ; Matveev, V. ; Melkumov, Georgy L. ; Merzlaya, Anastasia O. ; Messerly, B. ; Mik, Łukasz ; Morozov, Sergey ; Mrówczyński, Stanislaw ; Nagai, Y. ; Naskręt, Michał ; Ozvenchuk, Vitalii ; Paolone, V. ; Petukhov, Oleg ; Płaneta, Roman ; Podlaski, P. ; Popov, B. A. ; Porfy, B. ; Posiadała-Zezula, M. ; Prokhorova, D. S. ; Pszczel, Damian ; Puławski, S. ; Puzović, Jovan ; Ravonel, M. ; Renfordt, Rainer Arno Ernst ; Röhrich, Dieter ; Rondio, E. ; Roth, M. ; Rumberger, Brant T. ; Rumyantsev, M. ; Rustamov, Anar ; Rybczyński, Maciej ; Rybicki, Andrzej ; Sadovsky, Alexander ; Schmidt, K. ; Selyuzhenkov, Ilya ; Seryakov, A. Yu. ; Seyboth, Peter ; Słodkowski, M. ; Staszel, P. ; Stefanek, Grzegorz ; Stepaniak, J. ; Strichanov, Michail Nikolaevič ; Ströbele, Herbert ; Šuša, Tatjana ; Taranenko, Arkadiy ; Tefelska, A. ; Tefelski, Dariusz ; Tereshchenko, V. ; Toia, Alberica ; Tsenov, R. ; Turko, L. ; Ulrich, R. ; Unger, M. ; Uzhva, Denis ; Valiev, F. F. ; Veberič, Darko ; Vechernin, V. V. ; Wickremasinghe, A. ; Włodarczyk, Zbigniew ; Wojcik, K. ; Wyszyński, Oskar ; Zimmerman, E. D. ; Zwaska, Robert
his Erratum replaces incorrect plots shown in Fig. 7 with the corrected ones. In the publication, the NA57 [1] ratios of Ξ− and Ξ¯¯¯¯+ to the number of wounded nucleons at ⟨NW⟩=349 by mistake were plotted at the wrong values. The ratios were calculated and plotted by mistake using ⟨NW⟩=249.
The correct normalization does not change the conclusions of the paper. The correctly normalized results are presented in Fig. 7.
Aduszkiewicz, Antoni ; Ali, Yasir ; Andronov, Evgeny V. ; Antičić, Tome ; Baatar, B. ; Baszczyk, Mateusz ; Bhosale, S. ; Blondel, A. ; Bogomilov, Mariyan ; Brandin, Andrei V. ; Bravar, Alessandro ; Brzychczyk, Janusz ; Bunyatov, S. A. ; Busygina, O. ; Cherif, H. ; Ćirković, M. ; Czopowicz, T. ; Damyanova, A. ; Davis, N. ; Dembinski, H. ; Deveaux, Michael ; Dominik, W. ; Dorosz, Piotr ; Dumarchez, J. ; Engel, Ralph ; Ereditato, A. ; Faas, S. ; Feofilov, Grigori A. ; Fodor, Zoltán ; Francois, C. ; Garrido, X. ; Garibov, A. ; Gaździcki, Marek ; Golubeva, Marina ; Grebieszkow, Katarzyna ; Guber, Fedor ; Haesler, A. ; Hervé, A. E. ; Hylen, J. ; Igolkin, Sergey N. ; Ivashkin, Alexander ; Johnson, S. R. ; Kadija, Krešo ; Kaptur, E. ; Kiełbowicz, Mirosław ; Kireyeu, Viktar A. ; Klochkov, Viktor ; Kolesnikov, Vadim I. ; Kolev, D. ; Korzenev, A. ; Kovalenko, V. N. ; Kowalik, K. ; Kowalski, S. ; Koziel, Michal ; Krasnoperov, A. ; Kucewicz, Wojciech ; Kuich, M. ; Kurepin, Alexander ; Larsen, Dag Toppe ; László, A. ; Lazareva, Tatiana V. ; Lewicki, M. ; Lundberg, B. ; Łysakowski, B. ; Lyubushkin, V. V. ; Mariş, I. C. ; Maćkowiak-Pawłowska, Maja ; Maksiak, B. ; Malakhov, Aleksandr I. ; Manić, D. ; Marchionni, A. ; Marcinek, A. ; Marino, A. D. ; Marton, K. ; Mathes, H. -J. ; Matulewicz, Tomasz ; Matveev, V. ; Melkumov, Georgy L. ; Merzlaya, Anastasia O. ; Messerly, B. ; Mik, Łukasz ; Mills, G. B. ; Morozov, Sergey ; Mrówczyński, Stanislaw ; Nagai, Y. ; Naskręt, Michał ; Ozvenchuk, Vitalii ; Paolone, V. ; Pavin, M. ; Petukhov, Oleg ; Pistillo, C. ; Płaneta, Roman ; Podlaski, P. ; Popov, B. A. ; Posiadała, M. ; Puławski, S. ; Puzović, Jovan ; Rameika, R. ; Rauch, Wolfgang Hans ; Ravonel, M. ; Renfordt, Rainer Arno Ernst ; Richter-Wąs, E. ; Röhrich, Dieter ; Rondio, E. ; Roth, M. ; Rumberger, Brant T. ; Ruprecht, M. ; Rustamov, Anar ; Rybczyński, Maciej ; Rybicki, Andrzej ; Sadovsky, Alexander ; Schmidt, K. ; Selyuzhenkov, Ilya ; Seryakov, A. Yu. ; Seyboth, Peter ; Słodkowski, M. ; Snoch, Aleksandra ; Staszel, P. ; Stefanek, Grzegorz ; Stepaniak, J. ; Strichanov, Michail Nikolaevič ; Ströbele, Herbert ; Šuša, Tatjana ; Szuba, M. ; Taranenko, Arkadiy ; Tefelska, A. ; Tefelski, Dariusz ; Tereshchenko, V. ; Toia, Alberica ; Tsenov, R. ; Turko, L. ; Ulrich, R. ; Unger, M. ; Valiev, F. F. ; Veberič, Darko ; Vechernin, V. V. ; Walewski, M. ; Wickremasinghe, A. ; Wilkinson, C. ; Włodarczyk, Zbigniew ; Wojtaszek-Szwarc, Agnieszka ; Wyszyński, Oskar ; Zambelli, L. ; Zimmerman, E. D. ; Zwaska, Robert
We present measurements of ρ0, ω and K∗0 spectra in π−+ C production interactions at 158 GeV / c and ρ0 spectra at 350 GeV / c using the NA61/SHINE spectrometer at the CERN SPS. Spectra are presented as a function of the Feynman’s variable xF in the range 0<xF<1 and 0<xF<0.5 for 158 and 350 GeV / c respectively. Furthermore, we show comparisons with previous measurements and predictions of several hadronic interaction models. These measurements are essential for a better understanding of hadronic shower development and for improving the modeling of cosmic ray air showers.