Speaker
Description
Heavy-flavour production in p--Pb collisions is sensitive to Cold Nuclear Matter (CNM) effects such as the modification of the nuclear Parton Distribution Functions (PDFs), initial-stage radiation or energy loss, and multiple scattering of partons in the nucleus. These initial-state effects can induce a significant modification of the heavy-flavour production at low momentum and their measurement is required to understand final-state effects induced by the hot QGP medium in Pb--Pb collisions. In addition to transverse momentum and rapidity differential studies, measurements as a function of multiplicity are sensitive to the dependence of CNM effects on the collision geometry and on the density of final-state particles. The heavy-flavour $p_{\rm T}$ distribution can be modified by final-state effects in high-multiplicity p--Pb events induced by the formation of a medium with some degree of collectivity.
D mesons are reconstructed in p--Pb collisions at $\sqrt{s_{\rm NN}}=5.02$ TeV with ALICE at mid-rapidity. The measurement of the D-meson production cross section and its nuclear modification factor $R_{\rm pPb}$ down to $p_{\rm T}=0$ will be presented. The measurement of the yields of D mesons as a function of charged-particle multiplicity in p--Pb collisions, and the centrality dependence of the nuclear modification factor will be shown as well.
| Preferred Track | Open Heavy Flavors |
|---|---|
| Collaboration | ALICE |
