Measurement of heavy-flavour production as a function of multiplicity in pp and p-Pb collisions with ALICE

作者：Russo Riccardo^*

来源：Nuclear Physics A, 2014, 931: 552-557.

DOI：10.1016/j.nuclphysa.2014.07.047

• QGP
• Heavy-flavour
• Multi-parton interaction

In these proceedings results are presented from the measurement of open heavy-flavour production as a function of charged-particle multiplicity in pp collisions at root s =7 TeV and p-Pb collisions at root sNN = 5.02 TeV recorded with the ALICE detector in 2010 and 2013, respectively. D-0, D+ and D*+ mesons are reconstructed from their hadronic decay channels in the central rapidity region, and their production yields are measured in various multiplicity and (pT) intervals. %26lt;br%26gt;The per-event yields of D mesons in the various multiplicity intervals, normalized to their multiplicity-integrated value, and their evolution with (pT) are measured for pp and p-Pb collisions to study the contribution of Multi-Parton Interactions (MPIs) to open charm production in the two systems. The nuclear modification factor of D mesons in p-Pb collisions, defined as the ratio of the D-meson yields in p-Pb and pp collisions scaled by the average number of binary collisions (N-coll), is discussed in terms of its dependence on the event activity. Several experimental estimators of the event activity are used in order to assess the role of kinematic biases.

• 出版日期2014-11