Speaker
Fabio Filippo Colamaria
(Universita e INFN, Bari (IT))
Description
The study of heavy-quark production (charm and beauty) in pp collisions at LHC energies allows us to test perturbative QCD calculations and provides a reference for studies in heavy-ion collisions. Measurements in p--Pb collisions help to characterize the effects due to the presence of a nucleus in the collision (cold nuclear matter effects). ALICE has provided measurements of the nuclear modification factor $R_{\rm pPb}$ in the heavy-flavour sector. More differential measurements of charm and beauty production in pp and p--Pb collisions can provide further insight on the above topics.
The analysis of angular correlations between heavy-flavour particles and charged particles allows us to characterize the heavy-quark fragmentation process and is sensitive to their production mechanism. Differences between the measurements in pp and p--Pb collisions can give insight on how cold nuclear matter effects affect the heavy-quark production and hadronisation in p--Pb collisions. In the analysis of hadron-hadron correlations in p--Pb collisions, a double-ridge long-range structure was observed, possibly coming from a collective behavior of the system or gluon saturation in the initial state. This feature can be investigated for heavy quarks as well through heavy-flavour correlation studies. Moreover, the study of heavy-flavour production in pp collisions as a function of the charged-particle multiplicity is a powerful tool to investigate the interplay between hard and soft QCD processes responsible for particle production in hadronic collisions and provides information on the role of multi-parton interactions.
We present ALICE measurements of azimuthal correlations between prompt D mesons and heavy-flavour decay electrons with charged hadrons in pp collisions at $\sqrt s$ = 7 TeV and p--Pb collisions at $\sqrt {s_{\rm NN}}$= 5.02 TeV. We also show the per-event yields of D mesons as a function of the charged-particle multiplicity in pp collisions at $\sqrt s$ = 7 TeV.
| On behalf of collaboration: | ALICE |
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Primary author
Fabio Filippo Colamaria
(Universita e INFN, Bari (IT))
