Correlated pion-proton pair emission off hot and dense QCD matter

Jörn Adamczewski-Musch, Oliver Arnold, Claudia Behnke, Amel Belounnas, Alexander Belyaev, Jia-Chii Berger-Chen, Alberto Blanco, Christoph Blume, Michael Böhmer, Paula Bordalo, Sergey Chernenko, Lukáš Chlad, Izabela Ciepał, Christina Anna Deveaux, Jens Dreyer, Eliane Epple, Laura Fabbietti, Oleg Fateev, Peter Filip, Paulo Fonte, Celso Franco, Jürgen Friese, Ingo Fröhlich, Tetyana Galatyuk, Juan A. Garzón, Roman Gernhäuser, Marina Golubeva, Robert Greifenhagen, Fedor Guber, Malgorzata Gumberidze, Szymon Harabasz, Torsten Heinz, Thierry Hennino, Stanislav Hlaváč, Claudia Höhne, Romain Holzmann, Alexander P. Ierusalimov, Ivashkin Ivashkin, Burkhard Kämpfer, Tatiana Karavicheva, Behruz Kardan, Ilse Koenig, Wolfgang Koenig, Marvin Kohls, Burkhard W. Kolb, Grzegorz Korcyl, Georgy Kornakov, Frédéric Julian Kornas, Roland Kotte, Andrej Kugler, Tobias Kunz, Alexei Kurepin, A. Kurilkin, Pavel Kurilkin, Vladimir P. Ladygin, Rafał Tomasz Lalik, Kirill Lapidus, Alexander Lebedev, Luis Lopes, M. Lorenz, Tariq Mahmoud, Ludwig Maier, A. Malige, Alessio Mangiarotti, Jochen Markert, T. Matulewicz, Steffen Maurus, Volker Metag, Jan Michel, Dimitar M. Mihaylov, S. Morozov, Christian Müntz, Robert Helmut Münzer, L. Naumann, K. Nowakowski, Y. Parpottas, Vladimir Pechenov, Olga Pechenova, Oleg Petukhov, Krzysztof Piasecki, Jerzy Pietraszko, Witold Przygoda, Krzysztof Pysz, S. Ramos, Béatrice Ramstein, N. Rathod, Andrey Reshetin, Pablo Rodríguez Ramos, Philippe Rosier, Adrian Rost, Alexander Sadovsky, Piotr Salabura, Timo Scheib, Heidi Schuldes, Erwin Schwab, Federico Scozzi, Florian Seck, Patrick Sellheim, Ilya Selyuzhenkov, Johannes Stephan Siebenson, Luis Silva, U. Singh, Jerzy Smyrski, Yuri G. Sobolev, Stefano Spataro, Simon Spies, Herbert Ströbele, Joachim Stroth, Christian Sturm, Ondřej Svoboda, M. Szala, Pavel Tlustý, Michael Traxler, Haralabos Tsertos, Evgeny A. Usenko, Vladimir Wagner, Christian Wendisch, Michael Wiebusch, Joana Wirth, D. Wójcik, Yuri Zanevsky, Peter W. Zumbruch

  • 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.

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Author:Jörn Adamczewski-MuschORCiD, Oliver Arnold, Claudia BehnkeORCiDGND, Amel Belounnas, Alexander Belyaev, Jia-Chii Berger-Chen, Alberto BlancoORCiD, Christoph BlumeORCiDGND, Michael BöhmerORCiDGND, Paula BordaloORCiD, Sergey Chernenko, Lukáš ChladORCiD, Izabela Ciepał, Christina Anna DeveauxORCiDGND, Jens Dreyer, Eliane EppleORCiD, Laura FabbiettiORCiDGND, Oleg Fateev, Peter FilipORCiD, Paulo FonteORCiDGND, Celso Franco, Jürgen Friese, Ingo Fröhlich, Tetyana GalatyukORCiDGND, Juan A. Garzón, Roman GernhäuserORCiDGND, Marina Golubeva, Robert GreifenhagenORCiDGND, Fedor GuberORCiD, Malgorzata Gumberidze, Szymon HarabaszORCiD, Torsten Heinz, Thierry Hennino, Stanislav HlaváčORCiD, Claudia HöhneGND, Romain Holzmann, Alexander P. Ierusalimov, Ivashkin IvashkinORCiD, Burkhard Kämpfer, Tatiana Karavicheva, Behruz KardanORCiD, Ilse Koenig, Wolfgang Koenig, Marvin Kohls, Burkhard W. Kolb, Grzegorz KorcylORCiD, Georgy Kornakov, Frédéric Julian Kornas, Roland Kotte, Andrej KuglerORCiD, Tobias Kunz, Alexei Kurepin, A. Kurilkin, Pavel Kurilkin, Vladimir P. Ladygin, Rafał Tomasz Lalik, Kirill LapidusORCiD, Alexander Lebedev, Luis Lopes, M. Lorenz, Tariq MahmoudGND, Ludwig Maier, A. Malige, Alessio MangiarottiORCiD, Jochen MarkertGND, T. Matulewicz, Steffen Maurus, Volker MetagORCiDGND, Jan Michel, Dimitar M. Mihaylov, S. Morozov, Christian Müntz, Robert Helmut MünzerORCiDGND, L. Naumann, K. Nowakowski, Y. Parpottas, Vladimir Pechenov, Olga Pechenova, Oleg Petukhov, Krzysztof Piasecki, Jerzy Pietraszko, Witold PrzygodaORCiD, Krzysztof PyszORCiD, S. Ramos, Béatrice RamsteinORCiD, N. Rathod, Andrey ReshetinORCiD, Pablo Rodríguez RamosORCiD, Philippe RosierORCiD, Adrian RostGND, Alexander Sadovsky, Piotr SalaburaORCiD, Timo Scheib, Heidi SchuldesGND, Erwin Schwab, Federico Scozzi, Florian SeckORCiDGND, Patrick SellheimGND, Ilya SelyuzhenkovORCiD, Johannes Stephan SiebensonGND, Luis Silva, U. Singh, Jerzy SmyrskiORCiD, Yuri G. SobolevORCiDGND, Stefano SpataroORCiD, Simon SpiesORCiDGND, Herbert Ströbele, Joachim StrothORCiD, Christian Sturm, Ondřej Svoboda, M. Szala, Pavel Tlustý, Michael TraxlerORCiD, Haralabos TsertosORCiD, Evgeny A. Usenko, Vladimir Wagner, Christian WendischGND, Michael WiebuschORCiDGND, Joana WirthORCiD, D. Wójcik, Yuri Zanevsky, Peter W. ZumbruchGND
URN:urn:nbn:de:hebis:30:3-630775
DOI:https://doi.org/10.1016/j.physletb.2021.136421
ISSN:1873-2445
Parent Title (English):Physics letters B
Publisher:North-Holland Publ.
Place of publication:Amsterdam
Document Type:Article
Language:English
Date of Publication (online):2021/08/10
Date of first Publication:2021/08/10
Publishing Institution:Universitätsbibliothek Johann Christian Senckenberg
Release Date:2022/06/01
Tag:Baryonic resonances; Freezeout; Heavy-ion reactions
Volume:819
Issue:art. 136421
Page Number:8
First Page:1
Last Page:8
Note:
We gratefully acknowledge support by the following grants: SIP JUC Cracow, Cracow (Poland): National Science Center, 2016/23/P/ST2/040 POLONEZ, 2017/25/N/ST2/00580, 2017/26/M/ST2/00600; Warsaw University of Technology, Warsaw (Poland): OPUS grant from National Science Center of Poland 2017/27/B/ST2/01947; TU Darmstadt, Darmstadt (Germany): VH-NG-823, DFG GRK 2128, DFG CRC-TR 211, BMBF:05P18RDFC1; Goethe-University, Frankfurt (Germany): BMBF:06FY9100I, BMBF:05P19RFFCA, GSI F& E, HIC for FAIR (LOEWE); Goethe-University, Frankfurt (Germany) and TU Darmstadt, Darmstadt (Germany), ExtreMe Matter Institute EMMI at GSI Darmstadt; TU München, Garching (Germany): MLL München, DFG EClust 153, GSI TMLRG1316F, BmBF 05P15WOFCA, SFB 1258, DFG FAB898/2-2; the Russian Foundation for Basic Research (RFBR) funding within the research project no. 18-02-40086, the National Research Nuclear University MEPhI in the framework of the Russian Academic Excellence Project (contract No.﹨02.a03.21.0005, 27.08.2013), the Ministry of Science and Higher Education of the Russian Federation, Project “Fundamental properties of elementary particles and cosmology” No 0723-2020-0041, JLU Giessen, Giessen (Germany): BMBF:05P12RGGHM; IPN Orsay, Orsay Cedex (France): CNRS/IN2P3; NPI CAS, Rez, Rez (Czech Republic): MSMT LM2018112, OP VVV CZ.02.1.01/0.0/0.0/18_046/0016066, LTT17003.
HeBIS-PPN:496406892
Institutes:Physik
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik
Sammlungen:Universitätspublikationen
Licence (German):License LogoCreative Commons - Namensnennung 4.0