Measurement of azimuthal correlations between D mesons and charged hadrons with ALICE at the LHC

Abstract

The comparison of angular correlations between charmed mesons and charged hadrons produced in pp, p-Pb and Pb-Pb collisions can give insight into the mechanisms through which charm quarks lose energy in a QGP medium, produced in ultra-relativistic heavy-ion collisions, and can help to recognize possible modifications of their hadronization induced by the presence of the QGP. The analysis of pp and p-Pb data and the comparison with predictions from pQCD calculations, besides constituting the necessary reference for interpreting Pb-Pb data, can provide relevant information on charm production and fragmentation processes. In addition, possible differences between the results from pp and p-Pb collisions can give information on the presence of cold nuclear matter effects, affecting the charm production and hadronization in the latter collision system. A study of azimuthal correlations between D${}^0$, D${}^{+}$, and D${}^{\ast +}$ mesons and charged hadrons in pp collisions at $\sqrt{s}$ = 7 TeV and p-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.02 TeV are presented. D mesons were reconstructed from their hadronic decays at central rapidity in the transverse-momentum range $3\le p_{\mathrm{T}}^{\mathrm{D}}\le 16$ GeV/$c$ and were correlated to charged particles reconstructed in the pseudorapidity range $|\eta |<0.8$. Perspectives for the measurement in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 2.76 TeV will also be presented.

5 pages, 4 figures, Proceedings of the QCD@Work 2014 conference, 16-19 June 2014, Giovinazzo (Italy)

References in corpus (1)

• Measurement of charm production at central rapidity in proton-proton collisions at $\sqrt{s}=2.76$ TeV

Cited by in corpus (2)

• Heavy-flavour and quarkonium production in the LHC era: from proton-proton to heavy-ion collisions
• A New Census of the Universe's Entropy