학술논문
Correlated pion-proton pair emission off hot and dense QCD matter
Document Type
article
Author
J. Adamczewski-Musch; O. Arnold; C. Behnke; A. Belounnas; A. Belyaev; J.C. Berger-Chen; A. Blanco; C. Blume; M. Böhmer; P. Bordalo; S. Chernenko; L. Chlad; I. Ciepał; C. Deveaux; J. Dreyer; E. Epple; L. Fabbietti; O. Fateev; P. Filip; P. Fonte; C. Franco; J. Friese; I. Fröhlich; T. Galatyuk; J.A. Garzón; R. Gernhäuser; M. Golubeva; R. Greifenhagen; F. Guber; M. Gumberidze; S. Harabasz; T. Heinz; T. Hennino; S. Hlavac; C. Höhne; R. Holzmann; A. Ierusalimov; A. Ivashkin; B. Kämpfer; T. Karavicheva; B. Kardan; I. Koenig; W. Koenig; M. Kohls; B.W. Kolb; G. Korcyl; G. Kornakov; F. Kornas; R. Kotte; A. Kugler; T. Kunz; A. Kurepin; A. Kurilkin; P. Kurilkin; V. Ladygin; R. Lalik; K. Lapidus; A. Lebedev; L. Lopes; M. Lorenz; T. Mahmoud; L. Maier; A. Malige; A. Mangiarotti; J. Markert; T. Matulewicz; S. Maurus; V. Metag; J. Michel; D.M. Mihaylov; S. Morozov; C. Müntz; R. Münzer; L. Naumann; K. Nowakowski; Y. Parpottas; V. Pechenov; O. Pechenova; O. Petukhov; K. Piasecki; J. Pietraszko; W. Przygoda; K. Pysz; S. Ramos; B. Ramstein; N. Rathod; A. Reshetin; P. Rodriguez-Ramos; P. Rosier; A. Rost; A. Sadovsky; P. Salabura; T. Scheib; H. Schuldes; E. Schwab; F. Scozzi; F. Seck; P. Sellheim; I. Selyuzhenkov; J. Siebenson; L. Silva; U. Singh; J. Smyrski; Yu.G. Sobolev; S. Spataro; S. Spies; H. Ströbele; J. Stroth; C. Sturm; O. Svoboda; M. Szala; P. Tlusty; M. Traxler; H. Tsertos; E. Usenko; V. Wagner; C. Wendisch; M.G. Wiebusch; J. Wirth; D. Wójcik; Y. Zanevsky; P. Zumbruch
Source
Physics Letters B, Vol 819, Iss , Pp 136421- (2021)
Subject
Language
English
ISSN
0370-2693
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