Charm-tagged jets and correlation measurements with ALICE.

Palasciano A. per la ALICE Collaboration
  Venerdì 16/09   09:00 - 13:30   Aula B - Maria Goeppert-Mayer   I - Fisica nucleare e subnucleare   Presentazione
The ALICE Collaboration performed precise measurements of the production of a wide spectrum of charmed mesons and baryons. Complementary aspects of the charm quark production can be investigated by measuring charm-tagged jets and correlations providing, respectively, a closer access to the parton kinematics than single-particle measurements and a characterization of the charm-jet in terms of shape and composition. Measurements of the fragmentation function of jets containing fully reconstructed $D^{0}$ or $\Lambda^{+}_{c}$ baryons in pp collisions will be discussed. The first observation of the dead-cone effect impacting on the charm parton showers will be also presented via the measurements of $D^0$-tagged jets in pp collisions. The new measurement of the nuclear modification factor $R_{AA}$ of $D^{0}$-jets in 0-10% Pb-Pb collisions will also be presented to address the effects of the energy loss mechanisms in the QGP. The description of the charm quark fragmentation will be then completed by discussing the measurements of azimuthal correlations between $D$ mesons and charged particles in pp collisions, useful for validating Monte Carlo models, and in -Pb collisions, seizing the impact of cold nuclear matter effects.