Heavy quark results from STAR

Dong, Xin

doi:10.1140/epjc/s10052-009-0931-4

Title: Heavy quark results from STAR

Journal Article · Sat Feb 21 00:00:00 EST 2009 · European Physical Journal. C, Particles and Fields

DOI:https://doi.org/10.1140/epjc/s10052-009-0931-4· OSTI ID:1511311

Dong, Xin ^[1]

Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)

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.

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Research Organization:: Lawrence Berkeley National Lab. (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, Vol. 61, Issue 4; ISSN 1434-6044

Publisher:: SpringerCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 1 work

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