Heavy-flavor electron-muon correlations in $p$$+$$p$ and $d$+Au collisions at $\sqrt{s_{{}_{NN}}}$ = 200 GeV

Abstract

We report $e^{\pm }-{\mu }^{\mp }$ pair yield from charm decay measured between midrapidity electrons ($|\eta |<0.35$ and $p_T>0.5$ GeV/$c$) and forward rapidity muons ($1.4<\eta <2.1$ and $p_T>1.0$ GeV/$c$) as a function of $\Delta \varphi$ in both $p$$+$$p$ and in $d$+Au collisions at $\sqrt{s_{{}_{NN}}}=200$ GeV. Comparing the $p$$+$$p$ results with several different models, we find the results are consistent with a total charm cross section ${\sigma }_{c\bar{c}}=$ 538 $\pm$ 46 (stat) $\pm$ 197 (data syst) $\pm$ 174 (model syst) $\mu$b. These generators also indicate that the back-to-back peak at $\Delta \varphi =\pi$ is dominantly from the leading order contributions (gluon fusion), while higher order processes (flavor excitation and gluon splitting) contribute to the yield at all $\Delta \varphi$. We observe a suppression in the pair yield per collision in $d$+Au. We find the pair yield suppression factor for $2.7<\Delta \varphi <3.2$ rad is $J_{dA}$ = 0.433 $\pm$ 0.087 (stat) $\pm$ 0.135 (syst), indicating cold nuclear matter modification of $c\bar{c}$ pairs.

449 authors, 14 pages, 11 figures, 2 tables. Submitted to Phys. Rev. C. Plain text data tables for the points plotted in figures for this and previous PHENIX publications are (or will be) publicly available at http://www.phenix.bnl.gov/papers.html

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• Measurement of the Bottom contribution to non-photonic electron production in $p+p$ collisions at $\sqrt{s}$=200 GeV
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Cited by in corpus (10)

• Review of Jet Measurements in Heavy Ion Collisions
• Open Heavy Flavor in QCD Matter and in Nuclear Collisions
• Measurements of $\mu \mu$ pairs from open heavy flavor and Drell-Yan in $p+p$ collisions at $\sqrt{s}=200$ GeV
• Measurement of electrons from heavy-flavour hadron decays in p-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV
• Heavy-flavour production in high-energy d-Au and p-Pb collisions
• Measurement of azimuthal correlations of D mesons and charged particles in pp collisions at $\sqrt{s}=7$ TeV and p-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV
• New State of Nuclear Matter: Nearly Perfect Fluid of Quarks and Gluons in Heavy Ion Collisions at RHIC Energies
• Cross section for $b\bar{b}$ production via dielectrons in d$+$Au collisions at $\sqrt{s_{{}_{NN}}}=200$ GeV
• Production of muons from heavy-flavour hadron decays in p-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV
• Measurements of $e^{+}{e}^{-}$ pairs from open heavy flavor in $p$+$p$ and $d$+$A$ collisions at $\sqrt{s_{NN}}=200$ GeV