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Energy and centrality dependence of anti-p and p production and the anti-Lambda/anti-p ratio in Pb+Pb collisions between 20A GeV and 158A GeV (CROSBI ID 125248)

Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija

Alt, C. ; Antičić, Tome ; Baatar, B. ; Barna, D. ; Bartke, J. ; Betev, L. ; Bialkowska, H. ; Blume, C. ; Boimska, B. ; Botje, M. et al. Energy and centrality dependence of anti-p and p production and the anti-Lambda/anti-p ratio in Pb+Pb collisions between 20A GeV and 158A GeV // Physical review. C, Nuclear physics, 73 (2006), 044910-1-044910-10

Podaci o odgovornosti

Alt, C. ; Antičić, Tome ; Baatar, B. ; Barna, D. ; Bartke, J. ; Betev, L. ; Bialkowska, H. ; Blume, C. ; Boimska, B. ; Botje, M. ; Bracinik, J. ; Bramm, R. ; Bunčić, Predrag ; Cerny, V. ; Christakoglou, P. ; Chvala, O. ; Cramer, J.G. ; Csato, P. ; Dinkelaker, P. ; Eckardt, V. ; Flierl, D. ; Fodor, Z. ; Foka, P. ; Friese, V. ; Gal, J. ; Gazdzicki, M. ; Genchev, V. ; Georgopoulos, G. ; Gladysz, E. ; Grebieszkow, K. ; Hegyi, S. ; Höhne, C. ; Kadija, Krešo ; Karev, A. ; Kliemant, M. ; Kniege, S. ; Kolesnikov, V. I. ; Kornas, E. ; Korus, R. ; Kowalski, M. ; Kraus, Ivica ; Kreps, M. ; Laszlo, A. ; van Leeuwen, M. ; Levai, P. ; Litov, L. ; Lungwitz, B. ; Makariev, M. ; Malakhov, A. I. ; Mateev, M. ; Melkumov, G. L. ; Mischke, A. ; Mitrovski, M. ; Molnar, J. ; Mrowczynski, S. ; Nikolić, Vedran ; Palla, G. ; Panagiotou, A. D. ; Panayotov, D. ; Petridis, A. ; Pikna, M. ; Prindle, D. ; Pühlhofer, F. ; Renfordt, R. ; Roland, C. ; Roland, G. ; Rybczynski, M. ; Rybicki, A. ; Sandoval, A. ; Schmitz, N. ; Schuster, T. ; Seyboth, P. ; Sikler, F. ; Sitar, B. ; Skrzypczak, E. ; Stefanek, G. ; Stock, R. ; Strabel, C. ; Ströbele, H. ; Šuša, Tatjana ; Szentpetery, I. ; Sziklai, J. ; Szymanski, P. ; Trubnikov, V. ; Varga, Dražen ; Vassiliou, M. ; Veres, G.I. ; Vesztergombi, G. ; Vranić, Danilo ; Wetzler, A. ; Wlodarczyk, Z. ; Yoo, I.K. ; Zimanyi, J.

engleski

Energy and centrality dependence of anti-p and p production and the anti-Lambda/anti-p ratio in Pb+Pb collisions between 20A GeV and 158A GeV

The transverse mass mt distributions for antiprotons are measured at midrapidity for minimum bias Pb+Pb collisions at 158A GeV and for central Pb+Pb collisions at 20A, 30A, 40A, and 80A GeV beam energies in the fixed target experiment NA49 at the CERN SPS. The rapidity density dn/dy, inverse slope parameter T, and mean transverse mass <mt> derived from the mt distributions are studied as a function of the incident energy and the collision centrality and compared to the relevant data on proton production. The shapes of the mt distributions of anti-p and p are very similar. The ratios of the particle yields, anti-p/p and anti-Lambda/anti-p, are also analyzed. The anti-p/p ratio exhibits an increase with decreasing centrality and a steep rise with increasing beam energy. The anti-Lambda/anti-p ratio increases beyond unity with decreasing beam energy.

CERN; NA49; transverse mass; proton; anti-proton; anti-Lambda; centrality dependence; energy dependence

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Podaci o izdanju

73

2006.

044910-1-044910-10

objavljeno

0556-2813

Povezanost rada

Fizika

Poveznice
Indeksiranost