Speaker
Andrea Festanti
(Universita e INFN (IT))
Description
The study of D mesons in proton-nucleus collisions provides insight into the role of cold nuclear matter effects in charm production, such as the modification of parton densities in nuclei and initial-state multiple partonic scattering. The observed modification of the D-meson transverse momentum distributions in central Pb-Pb with respect to pp collisions has been confirmed as due to hot nuclear matter effects, accessing the effects of cold nuclear matter via p-Pb collisions.
ALICE collected data at $\sqrt{s_{\rm NN}}=5.02~\mathrm{TeV}$ during the 2013 LHC p-Pb run. ${\rm D}^0 \to {\rm K}^- \pi^+$ decays and their charge conjugates were reconstructed in the central rapidity region $|y_{{\rm lab}}|<0.8$. The ${\rm D^0}$ production cross section will be presented as a function of transverse momentum and rapidity. The nuclear modification factor in minimum-bias p-Pb collisions will be presented as well and compared with theoretical predictions including nuclear shadowing or saturation effects. Finally, the dependence of ${\rm D^0}$ production on the multiplicity of charged particles produced in the collision will be discussed.
On behalf of collaboration: | ALICE |
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Primary author
Andrea Festanti
(Universita e INFN (IT))