System-size dependence of open-heavy-flavor production in nucleus-nucleus collisions at $\sqrt{s_{_{NN}}}$=200 GeV - IN2P3 - Institut national de physique nucléaire et de physique des particules Access content directly
Journal Articles Physical Review C Year : 2014

System-size dependence of open-heavy-flavor production in nucleus-nucleus collisions at $\sqrt{s_{_{NN}}}$=200 GeV

Abstract

The PHENIX Collaboration at the Relativistic Heavy Ion Collider has measured open heavy flavor production in Cu$+$Cu collisions at $\sqrt{s_{_{NN}}}$=200 GeV through the measurement of electrons at midrapidity that originate from semileptonic decays of charm and bottom hadrons. In peripheral Cu$+$Cu collisions an enhanced production of electrons is observed relative to $p$$+$$p$ collisions scaled by the number of binary collisions. In the transverse momentum range from 1 to 5 GeV/$c$ the nuclear modification factor is $R_{AA}$$\sim$1.4. As the system size increases to more central Cu$+$Cu collisions, the enhancement gradually disappears and turns into a suppression. For $p_T>3$ GeV/$c$, the suppression reaches $R_{AA}$$\sim$0.8 in the most central collisions. The $p_T$ and centrality dependence of $R_{AA}$ in Cu$+$Cu collisions agree quantitatively with $R_{AA}$ in $d+$Au and Au$+$Au collisions, if compared at similar number of participating nucleons $\langle N_{\rm part} \rangle$.

Dates and versions

in2p3-00879551 , version 1 (04-11-2013)

Identifiers

Cite

A. Adare, Laurent Aphecetche, E. T. Atomssa, H. Delagrange, O. Drapier, et al.. System-size dependence of open-heavy-flavor production in nucleus-nucleus collisions at $\sqrt{s_{_{NN}}}$=200 GeV. Physical Review C, 2014, 90, pp.034903. ⟨10.1103/PhysRevC.90.034903⟩. ⟨in2p3-00879551⟩
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