학술논문
Deep sub-threshold ϕ production in Au+Au collisions
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; W. Kühn; 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; S. Maurus; V. Metag; J. Michel; D.M. Mihaylov; S. Morozov; C. Müntz; R. Münzer; L. Naumann; K.N. Nowakowski; M. Palka; Y. Parpottas; V. Pechenov; O. Pechenova; O. Petukhov; 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; J. Siebenson; L. Silva; Yu.G. Sobolev; S. Spataro; 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; Y. Zanevsky; P. Zumbruch
Source
Physics Letters B, Vol 778, Iss C, Pp 403-407 (2018)
Subject
Language
English
ISSN
0370-2693
1873-2445
1873-2445
Abstract
We present data on charged kaons (K±) and ϕ mesons in Au(1.23A GeV)+Au collisions. It is the first simultaneous measurement of K− and ϕ mesons in central heavy-ion collisions below a kinetic beam energy of 10A GeV. The ϕ/K− multiplicity ratio is found to be surprisingly high with a value of 0.52±0.16 and shows no dependence on the centrality of the collision. Consequently, the different slopes of the K+ and K− transverse-mass spectra can be explained solely by feed-down, which substantially softens the spectra of K− mesons. Hence, in contrast to the commonly adapted argumentation in literature, the different slopes do not necessarily imply diverging freeze-out temperatures of K+ and K− mesons caused by different couplings to baryons.