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Title: Heavy quark results from STAR

Abstract

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.

Authors:
 [1]
  1. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1511311
Grant/Contract Number:  
AC02-05CH11231
Resource Type:
Accepted Manuscript
Journal Name:
European Physical Journal. C, Particles and Fields
Additional Journal Information:
Journal Volume: 61; Journal Issue: 4; Journal ID: ISSN 1434-6044
Publisher:
Springer
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Dong, Xin. Heavy quark results from STAR. United States: N. p., 2009. Web. https://doi.org/10.1140/epjc/s10052-009-0931-4.
Dong, Xin. Heavy quark results from STAR. United States. https://doi.org/10.1140/epjc/s10052-009-0931-4
Dong, Xin. Sat . "Heavy quark results from STAR". United States. https://doi.org/10.1140/epjc/s10052-009-0931-4. https://www.osti.gov/servlets/purl/1511311.
@article{osti_1511311,
title = {Heavy quark results from STAR},
author = {Dong, Xin},
abstractNote = {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.},
doi = {10.1140/epjc/s10052-009-0931-4},
journal = {European Physical Journal. C, Particles and Fields},
number = 4,
volume = 61,
place = {United States},
year = {2009},
month = {2}
}

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Figures / Tables:

Fig. 2.1 Fig. 2.1: Invariant mass distributions formore » $D$0 + $\overline{D^0}$ candidates from $K$$π$ decay channel at low $ρ$$T$ in $d$ + Au (upper left), Au + Au (upper right) and Cu + Cu (lower) minimum bias collisions in$\sqrt{s_{NN}}$ = 200GeV« less

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Works referenced in this record:

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    Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.