Measurement of D* Mesons in Jets from p+p Collisions at sqrt{s} = 200 GeV

Details Measurement of D* Mesons in Jets from p+p Collisions at sqrt{s} = 200 GeV Measurement of D* Mesons in Jets from p+p Collisions at sqrt{s} = 200 GeV

2009-01-07

arxiv.org/abs/0901.0740v4

Phys. Rev. D 79 (2009) 112006

Physics

High Energy Physics

High Energy Physics - Experiment

7 pages, 4 figures

Scientific paper

We report the measurement of charged $D^*$ mesons in inclusive jets produced in proton-proton collisions at a center of mass energy $\sqrt{s}$ = 200 GeV with the STAR experiment at RHIC. For $D^{*}$ mesons with fractional momenta $0.2 < z < 0.5$ in inclusive jets with 11.5 GeV mean transverse energy, the production rate is found to be $N(D^{*+}+D^{*-})/N(\mathrm{jet}) = 0.015 \pm 0.008 (\mathrm{stat}) \pm 0.007 (\mathrm{sys})$. This rate is consistent with perturbative QCD evaluation of gluon splitting into a pair of charm quarks and subsequent hadronization.

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