K*(892)(0) and phi(1020) production in Pb-Pb collisions at root s(NN)=2.76 TeV

0443889 - ÚJF 2016 RIV US eng J - Journal Article
Abelev, B. - Adam, J. - Adamová, Dagmar - Bielčík, J. - Bielčíková, Jana - Čepila, J. - Ferencei, Jozef - Hladký, Jan - Křelina, M. - Křížek, Filip - Krus, M. - Kučera, Vít - Kushpil, Svetlana - Mareš, Jiří A. - Pachr, M. - Petráň, M. - Pospíšil, V. - Schulc, M. - Šmakal, R. - Špaček, M. - Šumbera, Michal - Vajzer, Michal - Wagner, V. - Zach, Č. - Závada, Petr … Total 928 authors
K*(892)(0) and phi(1020) production in Pb-Pb collisions at root s(NN)=2.76 TeV.
Physical Review. C. Roč. 91, č. 2 (2015), 024609. ISSN 0556-2813
R&D Projects: GA MŠMT(CZ) LG13031
Institutional support: RVO:68378271 ; RVO:61389005
Keywords : ALICE collaboration * heavy ion collision
Subject RIV: BG - Nuclear, Atomic and Molecular Physics, Colliders; BF - Elementary Particles and High Energy Physics (FZU-D)
Impact factor: 3.146, year: 2015

The measurements are performed in multiple centrality intervals at mid-rapidity (vertical bar y vertical bar < 0.5) in the transverse-momentum ranges 0.3 < p(T) < 5 GeV/c for the K*(892)(0) and 0.5 < p(T) < 5 GeV/c for the phi(1020). The yields of K*(892)(0) are suppressed in central Pb-Pb collisions with respect to pp and peripheral Pb-Pb collisions (perhaps due to rescattering of its decay products in the hadronic medium), while the longer-lived phi(1020) meson is not suppressed. These particles are also used as probes to study the mechanisms of particle production. The shape of the pT distribution of the phi(1020) meson, but not its yield, is reproduced fairly well by hydrodynamic models for central Pb-Pb collisions. In central Pb-Pb collisions at low and intermediate p(T), the p/phi(1020) ratio is flat in p(T), while the p/pi and phi(1020)/pi ratios show a pronounced increase and have similar shapes to each other. These results indicate that the shapes of the p(T) distributions of these particles in central Pb-Pb collisions are determined predominantly by the particle masses and radial flow. phi(1020) production in Pb-Pb collisions is enhanced, with respect to the yield in pp collisions and the yield of charged pions, by an amount similar to the Lambda and Xi.
Permanent Link: http://hdl.handle.net/11104/0246546