Speaker
Description
Due to their large masses, heavy quarks are produced in the
early stages of the relativistic heavy-ion collisions via initial hard
scatterings. Therefore, they are considered as effective probes of the
hot and dense QCD medium formed in such collisions since they
witness its full evolution. In pp collisions, the measurement of heavy-
flavour hadron production cross-sections can be used to test our
understanding of the Quantum ChromoDynamics (QCD) in the
perturbative regime. In addition, pp collisions provide a crucial
reference for the corresponding measurements in larger systems. In
p-Pb and Pb-Pb collisions, the measurement of the nuclear
modification factor ($R_{\rm AA}$) of electrons from beauty hadron decays
shed light on the mass dependence of energy loss of quarks inside
the cold and hot nuclear matter by comparing the ($R_{\rm AA}$) of charm
hadrons with the one of beauty hadrons and pions. Along with this,
more differential measurements such as their production as a
function of the charge-particle multiplicity provide insight into the
role of Multiple Parton Interactions (MPI) and the interplay between
the hard and soft production mechanisms of the particles.
In this contribution, the results from ALICE at the LHC are
reported on the different measurements of leptons (electrons and
muons) from heavy-flavour hadron decays in pp, p-Pb and Pb-Pb
collisions at different center of mass energies. The results include the
differential production cross section, nuclear modification factors and
multiplicity dependence at mid rapidity. Comparisons of the results
with model calculations including the interaction of heavy quarks
with the QGP medium, as well as implementing mass-dependent
energy loss, will be shown.
| Topic | Heavy Ion Physics |
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