Measurement of prompt D-0, D+, D{*}(+), and D-s(+) production in p-Pb collisions at root s(NN)=5:02 TeV
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and Zinovjev, G. and Zurlo, N. and ALICE Collaboration... Show more Show less
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Abstract
The measurement of the production of prompt D-0, D+, D{*}+, and D-S(+) =
5.02 TeV, with an integrated luminosity of 292 +/- 11 mu b(-1), are
reported. Differential production cross sections are measured at
mid-rapidity (-0.96 < y(cms)< 0.04) as a function of transverse momentum
(p(T)) in the intervals 0 < p(T)< 36 GeV/c for D-0, 1 < p(T)< 36 GeV/c
for D+ and D{*}+, and 2 < p(T)< 24 GeV/c for D+ mesons. For each
species, the nuclear modification factor R-pPb is calculated as a
function of p(T) ussing a proton-proton (pp) ref- erence measured at the
same collision energy. The results are compatible with unity in the
whole p(T) range. The average of the non-strange D mesons R-pPb is
compared with theoretical model predictions that include initial-state
effects and parton transport model predictions. The p(T) dependence of
the D-0, D+, and D{*}+ nuclear modification factors is also reported in
the interval 1 < p(T)< 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 different 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
p(T)-differential cross sections of D-0, 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 p(T) intervals. No
modification in the relative abundances of the four species is observed
with respect to pp collisions within the statistical and systematic
uncertainties.... Show more Show less