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Heavy quark results from STAR

Journal Article · · European Physical Journal. C, Particles and Fields
 [1]
  1. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
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I report the most recent measurements on open heavy flavor production at RHIC on behalf of the STAR collaboration. The total charm production cross section in midrapidity at RHIC energy is found to approximately scale by number of binary collisions in d + Au, Cu + Cu and Au + Au collisions. The nuclear modification factor of non-photonic electrons is strongly suppressed in central Au + Au collisions, suggesting substantial heavy quark energy loss at RHIC. The bottom decay contribution to non-photonic electrons was studied via the e-h and e-D° azimuthal angular correlations. The bottom contribution is found to be important at p T >5 GeV/c, and is consistent with the FONLL calculation within uncertainties. Charm production through gluon jet splitting was measured by studying the D *± contents in the fully reconstructed jets in p+p collisions. This rate is consistent with pQCD evaluation of gluon splitting into a pair of charm quarks and subsequent hadronization.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
1511311
Journal Information:
European Physical Journal. C, Particles and Fields, Journal Name: European Physical Journal. C, Particles and Fields Journal Issue: 4 Vol. 61; ISSN 1434-6044
Publisher:
SpringerCopyright Statement
Country of Publication:
United States
Language:
English

References (10)

Heavy particle content in QCD jets journal July 1985
A study of the D∗ content of jets at the CERN p collider journal July 1990
Extracting the charm cross-section from its semileptonic decay at RHIC journal August 2006
The first measurement of B meson semi-leptonic decay contribution to non-photonic electrons at RHIC journal July 2007
Longitudinal Double-Spin Asymmetry for Inclusive Jet Production in p → + p → Collisions at s = 200     GeV journal June 2008
Measurement of D / e m p h > production in jets from p¯p collisions at √s =1.8 TeV journal January 1990
Open Charm Yields in d + A u Collisions at s N N = 200     G e V journal February 2005
QCD Predictions for Charm and Bottom Quark Production at RHIC journal September 2005
Longitudinal Double-Spin Asymmetry and Cross Section for Inclusive Jet Production in Polarized Proton Collisions at s = 200     GeV journal December 2006
Transverse Momentum and Centrality Dependence of High- p T Nonphotonic Electron Suppression in Au + Au Collisions at s NN = 200     GeV journal May 2007

Figures / Tables (7)

Fig. 2.1(p. 3)figure Fig. 2.1
Table 2.1(p. 3)table Table 2.1
Fig. 2.2(p. 4)figure Fig. 2.2
Fig. 2.3(p. 4)figure Fig. 2.3
Fig. 2.4(p. 5)figure Fig. 2.4
Fig. 2.5(p. 6)figure Fig. 2.5
Fig. 2.6(p. 6)figure Fig. 2.6

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Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS