K(892)(*) resonance production in Au+Au and p+p collisions at root s(NN)=200 GeV

0308770 - ÚJF 2008 RIV US eng J - Journal Article
Adams, J. - Bysterský, Michal - Chaloupka, Petr - Lednický, Richard - Šumbera, Michal
K(892)(*) resonance production in Au+Au and p+p collisions at root s(NN)=200 GeV.
[Produkce resonance K(892)(*) ve srážkách Au+Au a p+p při root s(NN)=200 GeV.]
Physical Review. C. Roč. 71, č. 6 (2005), 064902-1. ISSN 0556-2813
R&D Projects: GA ČR GA202/04/0793
Institutional research plan: CEZ:AV0Z10480505; CEZ:AV0Z10100502
Keywords : K(892) * Au+Au collision * p+p collision
Subject RIV: BG - Nuclear, Atomic and Molecular Physics, Colliders
Impact factor: 3.610, year: 2005

The short-lived K(892)* resonance provides an efficient tool to probe properties of the hot and dense medium produced in relativistic heavy-ion collisions. We report measurements of K* in root s(NN)=200 GeV Au+Au and p+p collisions reconstructed via its hadronic decay channels K(892)*(0)-> K pi and K(892)*(+/-)-> K(S)(0)pi(+/-) using the STAR detector at the Relativistic Heavy Ion Collider at Brookhaven National Laboratory. The K*(0) mass has been studied as a function of p(T) in minimum bias p+p and central Au+Au collisions. The K-* p(T) spectra for minimum bias p+p interactions and for Au+Au collisions in different centralities are presented. The K*/K yield ratios for all centralities in Au+Au collisions are found to be significantly lower than the ratio in minimum bias p+p collisions, indicating the importance of hadronic interactions between chemical and kinetic freeze-outs.

Produkce resonance K(892)(*) ve srážkách Au+Au a p+p při root s(NN)=200 GeV.
Permanent Link: http://hdl.handle.net/11104/0161143