Naslov
K*0 production in Cu + Cu and Au + Au collisions at √sNN=62.4 GeV and 200 GeV

Autori
M. M. Aggarwal ; ... M. Planinic ; N. Poljak ; ...

Izvornik
Physical Review C (0556-2813) 84 (2011); 034909-1

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
STAR; 200GeV; K

Sažetak
We report on K*0 production at midrapidity in Au + Au and Cu + Cu collisions at √sNN=62.4 and 200 GeV collected by the Solenoid Tracker at the Relativistic Heavy Ion Collider detector. The K*0 is reconstructed via the hadronic decays K*0→K+π− and K*0̅ →K−π+. Transverse momentum, pT, spectra are measured over a range of pT extending from 0.2 GeV/c up to 5 GeV/c. The center-of-mass energy and system size dependence of the rapidity density, dN/dy, and the average transverse momentum, 〈pT〉, are presented. The measured N(K*0)/N(K) and N(φ)/N(K*0) ratios favor the dominance of rescattering of decay daughters of K*0 over the hadronic regeneration for the K*0 production. In the intermediate pT region (2.0<pT<4.0 GeV/c), the elliptic flow parameter, v2, and the nuclear modification factor, RCP, agree with the expectations from the quark coalescence model of particle production.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA