Data di Pubblicazione:
2021
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/dMπjavax.xml.bind.JAXBElement@3b2318adpdpTdy 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
Tipologia CRIS:
03A-Articolo su Rivista
Keywords:
Baryonic resonances; Freezeout; Heavy-ion reactions
Elenco autori:
Adamczewski-Musch J.; Arnold O.; Behnke C.; Belounnas A.; Belyaev A.; Berger-Chen J.C.; Blanco A.; Blume C.; Bohmer M.; Bordalo P.; Chernenko S.; Chlad L.; Ciepal I.; Deveaux C.; Dreyer J.; Epple E.; Fabbietti L.; Fateev O.; Filip P.; Fonte P.; Franco C.; Friese J.; Frohlich I.; Galatyuk T.; Garzon J.A.; Gernhauser R.; Golubeva M.; Greifenhagen R.; Guber F.; Gumberidze M.; Harabasz S.; Heinz T.; Hennino T.; Hlavac S.; Hohne C.; Holzmann R.; Ierusalimov A.; Ivashkin A.; Kampfer B.; Karavicheva T.; Kardan B.; Koenig I.; Koenig W.; Kohls M.; Kolb B.W.; 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.; Matulewicz T.; Maurus S.; Metag V.; Michel J.; Mihaylov D.M.; Morozov S.; Muntz C.; Munzer R.; Naumann L.; Nowakowski K.; Parpottas Y.; Pechenov V.; Pechenova O.; Petukhov O.; Piasecki K.; Pietraszko J.; 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.; Scozzi F.; Seck F.; Sellheim P.; Selyuzhenkov I.; Siebenson J.; Silva L.; Singh U.; Smyrski J.; Sobolev Y.G.; Spataro S.; Spies S.; Strobele H.; Stroth J.; Sturm C.; Svoboda O.; Szala M.; Tlusty P.; Traxler M.; Tsertos H.; Usenko E.; Wagner V.; Wendisch C.; Wiebusch M.G.; Wirth J.; Wojcik D.; Zanevsky Y.; Zumbruch P.
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