Show simple item record

dc.contributor.authorAdare, Andrew Marshall
dc.contributor.authorAfanasiev, Sergey V.
dc.contributor.authorAidala, Christine A.
dc.contributor.authorAjitanand, N. N.
dc.contributor.authorAkiba, Yasuyuki
dc.contributor.authorBaksay, Gyöngyi
dc.contributor.authorBaksay, László A.
dc.contributor.authorDehmelt, Klaus
dc.contributor.authorHohlmann, Marcus
dc.contributor.authorRembeczki, S.
dc.date.accessioned2017-03-15T20:32:32Z
dc.date.available2017-03-15T20:32:32Z
dc.date.issued2012-08-20
dc.identifier.citationAdare, A., Afanasiev, S., Aidala, C., Ajitanand, N. N., Akiba, Y., Al-Bataineh, H., . . . Zolin, L. (2012). Nuclear-modification factor for open-heavy-flavor production at forward rapidity in Cu+Cu collisions at √s NN=200 GeV. Physical Review C - Nuclear Physics, 86(2) doi:10.1103/PhysRevC.86.024909en_US
dc.identifier.urihttp://hdl.handle.net/11141/1262
dc.description.abstractBackground: Heavy-flavor production in p + p collisions is a good test of perturbative-quantum-chromodynamics (pQCD) calculations. Modification of heavy-flavor production in heavy-ion collisions relative to binary-collision scaling from p + p results, quantified with the nuclear-modification factor (R AA), provides information on both cold- and hot-nuclear-matter effects. Midrapidity heavy-flavor R AA measurements at the Relativistic Heavy Ion Collider have challenged parton-energy-loss models and resulted in upper limits on the viscosity-entropy ratio that are near the quantum lower bound. Such measurements have not been made in the forward-rapidity region. Purpose: Determine transverse-momentum (p T) spectra and the corresponding R AA for muons from heavy-flavor meson decay in p + p and Cu + Cu collisions at √s NN=200 GeV and y=1.65. Method: Results are obtained using the semileptonic decay of heavy-flavor mesons into negative muons. The PHENIX muon-arm spectrometers measure the p T spectra of inclusive muon candidates. Backgrounds, primarily due to light hadrons, are determined with a Monte Carlo calculation using a set of input hadron distributions tuned to match measured-hadron distributions in the same detector and statistically subtracted. Results: The charm-production cross section in p + p collisions at √s=200 GeV, integrated over p T and in the rapidity range 1.4<y<1.9, is found to be dσ cc̄/dy=0.139±0.029(stat)-0.058+0. 051(syst) mb. This result is consistent with a perturbative fixed-order-plus- next-to-leading-log calculation within scale uncertainties and is also consistent with expectations based on the corresponding midrapidity charm-production cross section measured by PHENIX. The R AA for heavy-flavor muons in Cu + Cu collisions is measured in three centrality bins for 1<p T<4 GeV/c. Suppression relative to binary-collision scaling (R AA<1) increases with centrality. Conclusions: Within experimental and theoretical uncertainties, the measured charm yield in p + p collisions is consistent with state-of-the-art pQCD calculations. Suppression in central Cu + Cu collisions suggests the presence of significant cold-nuclear-matter effects and final-state energy loss.en_US
dc.language.isoen_USen_US
dc.rightsThis published article is made available in accordance with publishers policy. It may be subject to U.S. copyright law.en_US
dc.rights.urihttps://journals.aps.org/info/terms.htmlen_US
dc.titleNuclear-modification factor for open-heavy-flavor production at forward rapidity in Cu+Cu collisions at √sNN=200 GeVen_US
dc.typeArticleen_US
dc.identifier.doi10.1103/PhysRevC.86.024909


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record