$K^{*0}$ production in Cu+Cu and Au+Au collisions at $\sqrt{s_NN} = 62.4$ GeV and 200 GeV - INSPIRE

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$K^{*0}$ production in Cu+Cu and Au+Au collisions at $\sqrt{s_NN} = 62.4$ GeV and 200 GeV

STAR

Collaboration

Jun, 2010

20 pages

Published in:

Phys.Rev.C 84 (2011) 034909

e-Print:

1006.1961 [nucl-ex]

DOI:

10.1103/PhysRevC.84.034909

Experiments:

BNL-RHIC-STAR

View in:

reference search101 citations

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Abstract: (arXiv)

We report on K*0 production at mid-rapidity in Au+Au and Cu+Cu collisions at \sqrt{s_{NN}} = 62.4 and 200 GeV collected by the Solenoid Tracker at RHIC (STAR) detector. The K*0 is reconstructed via the hadronic decays K*0 \to K+ pi- and \bar{K*0} \to K-pi+. Transverse momentum, pT, spectra are measured over a range of pT extending from 0.2 GeV/c to 5 GeV/c. The center of mass energy and system size dependence of the rapidity density, dN/dy, and the average transverse momentum, , are presented. The measured N(K*0)/N(K) and N(\phi)/N(K*0) ratios favor the dominance of re-scattering 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.

Note:

14 pages and 13 figures

13.75.Cs
25.75.Dw
heavy ion: scattering
copper
gold
K*(892): hadroproduction
K*(892): hadronic decay
K*(892): yield
K-: yield
Phi(1020): yield

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