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Measurement of prompt D-meson production in p-Pb collisions at sqrt(sNN) = 5.02 TeV

Abstract : The pt-differential production cross sections of the prompt charmed mesons D0, D+, D*+ and Ds+ and their charge conjugate in the rapidity interval -0.96 < y_cms < 0.04 were measured in p-Pb collisions at a centre-of-mass energy sqrt(sNN) = 5.02 TeV with the ALICE detector at the LHC. The nuclear modification factor R_pPb, quantifying the D-meson yield in p--Pb collisions relative to the yield in pp collisions scaled by the number of binary nucleon-nucleon collisions, is compatible within the 15-20% uncertainties with unity in the transverse momentum interval 1 < pt < 24 GeV/c. No significant difference among the R_pPb of the four D-meson species is observed. The results are described within uncertainties by theoretical calculations that include initial-state effects. The measurement adds experimental evidence that the modification of the momentum spectrum of D mesons observed in Pb-Pb collisions with respect to pp collisions is due to strong final-state effects induced by hot partonic matter.
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Contributor : Emmanuelle Vernay <>
Submitted on : Thursday, May 15, 2014 - 8:12:21 AM
Last modification on : Wednesday, September 16, 2020 - 4:08:48 PM

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B. Abelev, A. Baldisseri, H. Borel, J. Castillo Castellanos, G. Conesa Balbastre, et al.. Measurement of prompt D-meson production in p-Pb collisions at sqrt(sNN) = 5.02 TeV. Physical Review Letters, American Physical Society, 2014, 113, pp.232301. ⟨10.1103/PhysRevLett.113.232301⟩. ⟨in2p3-00991255⟩



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