Measurement of prompt D0, D+, D*+, and D+s production in p-Pb collisions at sqrt(s_NN) = 5.02 TeV

The measurement of the production of prompt D0, D+, D*+, and D+s mesons in proton{lead (p-Pb) collisions at the centre-of-mass energy per nucleon pair of sqrt(s_NN) = 5:02TeV, with an integrated luminosity of 292 11 b1, are reported. Dierential production cross sections are measured at mid-rapidity (0:96 < ycms < 0:04) as a function of transverse momentum (pT) in the intervals 0 < pT < 36 GeV=c for D0, 1 < pT < 36 GeV=c for D+ and D+, and 2 < pT < 24 GeV=c for D+s mesons. For each species, the nuclear modi cation factor RpPb is calculated as a function of pT using a proton-proton (pp) reference measured at the same collision energy. The results are compatible with unity in the whole pT range. The average of the non-strange D mesons RpPb is compared with theoretical model predictions that include initial-state eects and parton transport model predictions. The pT dependence of the D0, D+, and D+ nuclear modi cation factors is also reported in the interval 1 < pT < 36 GeV=c as a function of the collision centrality, and the central-to-peripheral ratios are computed from the D-meson yields measured in dierent centrality classes. The results are further compared with charged-particle measurements and a similar trend is observed in all the centrality classes. The ratios of the pT-dierential cross sections of D0, D+, D+, and D+s mesons are also reported. The D+s and D+ yields are compared as a function of the charged-particle multiplicity for several pT intervals. No modi cation in the relative abundances of the four species is observed with respect to pp collisions within the statistical and systematic uncertainties.