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

Adamczewski-Musch, J.; Lebedev, A.; Naumann, L.; Fateev, O.; Chlad, L.; Rost, A.; Rosier, P.; Guber, F.; Höhne, C.; Kardan, B.; Kurilkin, P.; Tsertos, H.; Szala, M.; Deveaux, C.; Sadovsky, A.; Fabbietti, L.; Blanco, A.; Fröhlich, I.; Sellheim, P.; Traxler, M.; Malige, A.; Pechenov, V.; Zanevsky, Y.; Arnold, O.; Stroth, J.; Pechenova, O.; Silva, L.; Parpottas, Y.; Greifenhagen, R.; Münzer, R.; Petukhov, O.; Franco, C.; Schuldes, H.; Ramstein, B.; Gumberidze, M.; Reshetin, A.; Ramos, S.; Belounnas, A.; Metag, V.; Behnke, C.; Smyrski, J.; Spies, S.; Koenig, Wolfgang; Wagner, V.; Müntz, C.; Ierusalimov, A.; Pietraszko, J.; Przygoda, W.; Wiebusch, M. G.; Korcyl, G.; Galatyuk, T.; Usenko, E.; Gernhäuser, R.; Ciepał, I.; Sturm, C.; Chernenko, S.; Salabura, P.; Morozov, S.; Markert, J.; Kornakov, G.; Maier, L.; Kolb, B. W.; Kurepin, A.; Scozzi, F.; Mihaylov, D. M.; Lapidus, K.; Siebenson, J.; Pysz, K.; Schwab, E.; Rodriguez-Ramos, P.; Holzmann, R.; Friese, J.; Matulewicz, T.; Spataro, S.; Kornas, F.; Piasecki, K.; Tlusty, P.; Fonte, P.; Hlavac, S.; Harabasz, S.; Böhmer, M.; Koenig, Ilse; Garzón, J. A.; Dreyer, J.; Wendisch, C.; Lalik, R.; Berger-Chen, J. C.; Hennino, T.; Blume, C.; Mahmoud, T.; Filip, P.; Lopes, L.; Ivashkin, A.; Wirth, J.; Kämpfer, B.; Heinz, T.; Scheib, T.; Maurus, S.; Kunz, T.; Seck, F.; Nowakowski, K.; Ladygin, V.; Epple, E.; Michel, J.; Mangiarotti, A.; Kurilkin, A.; Kotte, R.; Singh, U.; Svoboda, O.; Kohls, M.; Ströbele, H.; Selyuzhenkov, I.; Lorenz, M.; Sobolev, Yu. G.; Rathod, N.; Belyaev, A.; Kugler, A.; Karavicheva, T.; Bordalo, P.; Zumbruch, P.; Golubeva, M.; Wójcik, D.

doi:10.1016/j.physletb.2021.136421

Journal Article

GSI-2022-00244

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

Adamczewski-Musch, J. ; Arnold, O. ; Behnke, C. ; Belounnas, A. ; Belyaev, A. ; Berger-Chen, J. C. ; Blanco, A. ; Blume, C. ; Böhmer, M. ; Bordalo, P. ; Chernenko, S. ; Chlad, L. ; Ciepał, I. ; Deveaux, C. ; Dreyer, J. ; Epple, E. ; Fabbietti, L. ; Fateev, O. ; Filip, P. ; Fonte, P. ; Franco, C. ; Friese, J. ; Fröhlich, I. ; Galatyuk, T.GSI* ; Garzón, J. A. ; Gernhäuser, R. ; Golubeva, M. ; Greifenhagen, R. ; Guber, F. ; Gumberidze, M.GSI* ; Harabasz, S. ; Heinz, T.GSI* ; Hennino, T. ; Hlavac, S. ; Höhne, C.GSI* ; Holzmann, R. (Corresponding author)GSI* ; Ierusalimov, A. ; Ivashkin, A. ; Kämpfer, B. ; Karavicheva, T. ; Kardan, B. ; Koenig, I.GSI* ; Koenig, W.GSI* ; Kohls, M. ; Kolb, B. W.GSI* ; Korcyl, G. ; Kornakov, G. ; Kornas, F. ; Kotte, R. ; Kugler, A. ; Kunz, T. ; Kurepin, A. ; Kurilkin, A. ; Kurilkin, P. ; Ladygin, V. ; Lalik, R. ; Lapidus, K. ; Lebedev, A. ; Lopes, L. ; Lorenz, M. ; Mahmoud, T. ; Maier, L. ; Malige, A. ; Mangiarotti, A. ; Markert, J.GSI* ; Matulewicz, T. ; Maurus, S. ; Metag, V. ; Michel, J. ; Mihaylov, D. M. ; Morozov, S. ; Müntz, C. ; Münzer, R. ; Naumann, L. ; Nowakowski, K. ; Parpottas, Y. ; Pechenov, V.GSI* ; Pechenova, O.GSI* ; Petukhov, O. ; Piasecki, K. ; Pietraszko, J.GSI* ; Przygoda, W. ; Pysz, K. ; Ramos, S. ; Ramstein, B. ; Rathod, N. ; Reshetin, A. ; Rodriguez-Ramos, P. ; Rosier, P. ; Rost, A. ; Sadovsky, A. ; Salabura, P. ; Scheib, T. ; Schuldes, H. ; Schwab, E.GSI* ; Scozzi, F. ; Seck, F. ; Sellheim, P. ; Selyuzhenkov, I.GSI* ; Siebenson, J. ; Silva, L. ; Singh, U. ; Smyrski, J. ; Sobolev, Y. G. ; Spataro, S. ; Spies, S. ; Ströbele, H. ; Stroth, J.GSI* ; Sturm, C.GSI* ; Svoboda, O. ; Szala, M. ; Tlusty, P. ; Traxler, M.GSI* ; Tsertos, H. ; Usenko, E. ; Wagner, V. ; Wendisch, C.GSI* ; Wiebusch, M. G.GSI* ; Wirth, J. ; Wójcik, D. ; Zanevsky, Y. ; Zumbruch, P.GSI*

2021
North-Holland Publ. Amsterdam

Physics letters / B 819, 136421 (2021) [10.1016/j.physletb.2021.136421]

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Please use a persistent id in citations: doi:10.1016/j.physletb.2021.136421 doi:10.15120/GSI-2022-00244

Report No.: arXiv:2012.01351

Abstract: 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.

Keyword(s): excited state: energy ; Delta(1232): mass ; energy: kinetic ; hadron: energy ; quantum chromodynamics: matter ; pi p: correlation ; transverse momentum dependence ; transverse momentum ; Breit-Wigner ; background ; fireball ; rapidity ; isospin ; HADES ; 2.42 GeV-cms/nucleon ; Baryonic resonances ; Heavy-ion reactions ; Freezeout

Classification:

ddc:530

Note: This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). Funded bySCOAP3

Contributing Institute(s):

HADES (HAD)

Research Program(s):

612 - Cosmic Matter in the Laboratory (POF4-612) (POF4-612)

Experiment(s):

S407: Investigation of baryon rich dense nuclear matter by means of rare probes with HADES (POF3-612; HAD)

Appears in the scientific report 2021

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Record created 2022-01-26, last modified 2023-11-03

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