Data di Pubblicazione:
2019
Abstract:
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.
Tipologia CRIS:
03A-Articolo su Rivista
Elenco autori:
Adamczewski-Musch J.; Arnold O.; Behnke C.; Belounnas A.; Belyaev A.; Berger-Chen J.C.; Biernat J.; Blanco A.; Blume C.; Bohmer M.; Bordalo P.; Chernenko S.; Chlad L.; Deveaux C.; Dreyer J.; Dybczak A.; 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.; Kolb B.W.; Korcyl G.; Kornakov G.; 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.; 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.; Palka M.; Parpottas Y.; Pechenov V.; Pechenova O.; Petukhov O.; Piasecki K.; Pietraszko J.; Przygoda W.; Ramos S.; Ramstein B.; 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.; Sobolev Y.G.; Spataro S.; Spies S.; Strobele H.; Stroth J.; Strzempek P.; 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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