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

J. Adams et al. (STAR Collaboration)
Phys. Rev. C 71, 064902 – Published 6 June 2005

Abstract

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 sNN=200GeV Au+Au and p+p collisions reconstructed via its hadronic decay channels K(892)*0Kπ and K(892)*±KS0π± 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 pT in minimum bias p+p and central Au+Au collisions. The K*pT 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. A significant nonzero K*0 elliptic flow (v2) is observed in Au+Au collisions and is compared to the KS0 and Λ v2. The nuclear modification factor of K* at intermediate pT is similar to that of KS0 but different from Λ. This establishes a baryon-meson effect over a mass effect in the particle production at intermediate pT (2<pT4GeV/c).

  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
9 More
  • Received 9 December 2004

DOI:https://doi.org/10.1103/PhysRevC.71.064902

©2005 American Physical Society

Authors & Affiliations

Click to Expand

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 71, Iss. 6 — June 2005

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review C

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×