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    Cold-nuclear-matter effects on heavy-quark production at forward and backward rapidity in d+Au collisions at sNN =200GeV

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    PRL20141A.pdf (668.0Kb)
    Date
    2014-06-25
    Author
    Rembeczki, S.
    Hohlmann, Marcus
    Baksay, László A
    Baksay, Gyöngyi
    Adare, Andrew Marshall
    Aidala, C.
    Ajitanand, N. N.
    Akiba, Yasuyuki
    Akimoto, R.
    Al-Bataineh, H.
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    Abstract
    The PHENIX experiment has measured open heavy-flavor production via semileptonic decay over the transverse momentum range 1<pT<6GeV/c at forward and backward rapidity (1.4<|y|<2.0) in d+Au and p+p collisions at sNN=200GeV. In central d+Au collisions, relative to the yield in p+p collisions scaled by the number of binary nucleon-nucleon collisions, a suppression is observed at forward rapidity (in the d-going direction) and an enhancement at backward rapidity (in the Au-going direction). Predictions using nuclear-modified-parton-distribution functions, even with additional nuclear-pT broadening, cannot simultaneously reproduce the data at both rapidity ranges, which implies that these models are incomplete and suggests the possible importance of final-state interactions in the asymmetric d+Au collision system. These results can be used to probe cold-nuclear-matter effects, which may significantly affect heavy-quark production, in addition to helping constrain the magnitude of charmonia-breakup effects in nuclear matter.
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    http://hdl.handle.net/11141/302
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