The pT-differential production cross sections of the prompt charmed mesons D0, D+, D*+, and D+s and their charge conjugate in the rapidity interval −0.96<ycms<0.04 were measured in p−Pb collisions at a center-of-mass energy sNN−−−−√=5.02 TeV with the ALICE detector at the LHC. The nuclear modification factor RpPb, 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 RpPb 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.
Abelev, B., J. Adam, D. Adamova, M. M. Aggarwal, G. Aglieri Rinella, M. Agnello, A. Agostinelli, N. Agrawal, and Daniel Tapia Takaki. Measurement of Prompt D-Meson Production in p−Pb Collisions at sNN−−−−√=5.02 TeV Physical Review Letters. 113.23 (2014). http://dx.doi.org/10.1103/PhysRevLett.113.232301
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