학술논문
Identical pion intensity interferometry in central Au+Au collisions at 1.23A GeV
Document Type
article
Author
J. Adamczewski-Musch; O. Arnold; C. Behnke; A. Belounnas; A. Belyaev; J.C. Berger-Chen; J. Biernat; A. Blanco; C. Blume; M. Böhmer; P. Bordalo; S. Chernenko; L. Chlad; C. Deveaux; J. Dreyer; A. Dybczak; 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; B.W. Kolb; G. Korcyl; G. Kornakov; 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. Mangiarotti; J. Markert; T. Matulewicz; S. Maurus; V. Metag; J. Michel; D.M. Mihaylov; S. Morozov; C. Müntz; R. Münzer; L. Naumann; K. Nowakowski; M. Palka; Y. Parpottas; V. Pechenov; O. Pechenova; O. Petukhov; K. Piasecki; J. Pietraszko; W. Przygoda; S. Ramos; B. Ramstein; 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; Yu.G. Sobolev; S. Spataro; S. Spies; H. Ströbele; J. Stroth; P. Strzempek; 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 795, Iss , Pp 446-451 (2019)
Subject
Language
English
ISSN
0370-2693
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.