2 research outputs found
Measurement of D-meson production versus multiplicity in p-Pb collisions at root s(NN)=5.02 TeV
The measurement of prompt D-meson production as a function of
multiplicity in p-Pb collisions at TeV with the ALICE detector at root
s(NN) the LHC is reported. D-0, D+ and Dau+ mesons are reconstructed via
their hadronic decay channels in the centre-of-mass rapidity range -0.96
< y(cms) < 0.04 and transverse momentum interval 1 < p(T) < 24 GeV/c.
The multiplicity dependence of D-meson production is examined by either
comparing yields in p-Pb collisions in different event classes, selected
based on the multiplicity of produced particles or zero-degree energy,
with those in pp collisions, scaled by the number of binary
nucleon-nucleon collisions (nuclear modification factor); as well as by
evaluating the per-event yields in p-Pb collisions in different
multiplicity intervals normalised to the multiplicity-integrated ones
(relative yields). The nuclear modification factors for D-0, D+ and
D*(+) are consistent with one another. The D-meson nuclear
modification factors as a function of the zero-degree energy are
consistent with unity within uncertainties in the measured p(T) regions
and event classes. The relative D-meson yields, calculated in various
p(T) intervals, increase as a function of the charged-particle
multiplicity. The results are compared with the equivalent pp
measurements at root s = 7 TeV as well as with EPOS 3 calculations