Speaker
Description
Charm quarks are created in the early stages of heavy-ion collisions in hard-scattering processes. Therefore, they are ideal probes of the Quark-Gluon Plasma (QGP). The fragmentation of charm quarks can produce D mesons.
Jets containing a D meson as one of their constituents can be identified as originating from heavy-quark fragmentation. D-tagged jets are a valuable tool to characterize the charm interaction with the QGP. Furthermore, charmed jets can provide complementary information to D-meson measurements to study the mass-dependent energy loss by analysing the modification of the charm-jet yield in Pb--Pb collisions with respect to pp collisions as a function of the jet transverse momentum. A further insight can be obtained with the measurement of the momentum-fraction distribution, which is of particular interest to investigate the possible influence of the medium in the charm-jet fragmentation.
D mesons are reconstructed through an invariant mass analysis of their hadronic decay channels, rejecting the large combinatorial background with topological selections exploiting the relatively large signal lifetime of D mesons and the particle-identification capabilities of the detector. Jets are reconstructed with anti-$k_{\rm T}$ algorithm using the D-meson candidates and the charged tracks. The ALICE Time Projection Chamber and the Inner Tracking System detectors allow us to measure D mesons and jets down to low $p_{\rm T}$, where the probes are more sensitive to the effects of the hot medium.
The analysis status of the measurement of D-tagged jets in Pb--Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.02 TeV will be presented.
| Preferred Track | Open Heavy Flavors |
|---|---|
| Collaboration | ALICE |
