Cold-Nuclear-Matter Effects on Heavy-Quark Production in d+Au Collisions at sNN=200 GeV

Adare, A.; Awes, Terry C.; Cianciolo, Vince; Efremenko, Yuri V.; Enokizono, Akitomo; Read Jr, Kenneth F.; Silvermyr, David O.; Sorensen, Soren P.; Stankus, Paul W.; Young, Glenn R.; Collaboration, Phenix

doi:10.1103/PhysRevLett.109.242301

Title: Cold-Nuclear-Matter Effects on Heavy-Quark Production in d+Au Collisions at $\sqrt{s_{NN}}$ =200 GeV

Journal Article · Sat Dec 01 00:00:00 EST 2012 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.109.242301· OSTI ID:1090523

Adare, A. ^[1]; Awes, Terry C. ^[2];

^[2]; Efremenko, Yuri V. ^[2]; Enokizono, Akitomo ^[2];

^[2]; Silvermyr, David O. ^[2];

^[2];

^[2]; Young, Glenn R. ^[2]; Collaboration, Phenix ^[3]

University of Colorado, Boulder
ORNL
PHENIX Collaboration

The PHENIX experiment has measured electrons and positrons at midrapidity from the decays of hadrons containing charm and bottom quarks produced in d+Au and p+p collisions at $\sqrt{s_{NN}}$ =200 GeV in the transverse-momentum range 0.85≤p^e_T≤8.5 GeV/c. In central d+Au collisions, the nuclear modification factor R_dA at 1.5_T<5 GeV/c displays evidence of enhancement of these electrons, relative to those produced in p+p collisions, and shows that the mass-dependent Cronin enhancement observed at the Relativistic Heavy Ion Collider extends to the heavy D meson family. A comparison with the neutral-pion data suggests that the difference in cold-nuclear-matter effects on light- and heavy-flavor mesons could contribute to the observed differences between the π⁰ and heavy-flavor-electron nuclear modification factors R_AA.

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Research Organization:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE

DOE Contract Number:: AC05-00OR22725

OSTI ID:: 1090523

Journal Information:: Physical Review Letters, Vol. 109, Issue 24; ISSN 0031-9007

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: English

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