Probing Charm Quark Dynamics via Multiparticle Correlations in Pb-Pb Collisions at sNN=5.02 TeV
Physical Review Letters, vol. 129, pp. 022001
Abstract
Multiparticle azimuthal correlations of prompt D^{0} mesons are measured in Pb-Pb collisions at a nucleon-nucleon center-of-mass energy of sqrt[s_{NN}]=5.02 TeV. For the first time, a four-particle cumulant method is used to extract the second Fourier coefficient of the azimuthal distribution (v_{2}) of D^{0} mesons as a function of event centrality and the D^{0} transverse momentum. The ratios of the four-particle v_{2} values to previously measured two-particle cumulant results provide direct experimental access to event-by-event fluctuations of charm quark azimuthal anisotropies. These ratios are also found to be comparable to those of inclusive charged particles in the event. However, hints of deviations are seen in the most central and peripheral collisions. To investigate the origin of flow fluctuations in the charm sector, these measurements are compared to a model implementing fluctuations of charm quark energy loss via collisional or radiative processes in the quark-gluon plasma. These models cannot quantitatively describe the data over the full transverse momentum and centrality ranges, although the calculations with collisional energy loss provide a better description of the data.
Authors 27
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Institute of High Energy Physics
Affiliation as printed
Institut für Hochenergiephysik, Vienna, Austria
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Institute of High Energy Physics
Affiliation as printed
Institut für Hochenergiephysik, Vienna, Austria
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Institute of High Energy Physics
Affiliation as printed
Institut für Hochenergiephysik, Vienna, Austria
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Institute of High Energy Physics
Affiliation as printed
Institut für Hochenergiephysik, Vienna, Austria
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Institute of High Energy Physics
Affiliation as printed
Institut für Hochenergiephysik, Vienna, Austria
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Institute of High Energy Physics
Affiliation as printed
Institut für Hochenergiephysik, Vienna, Austria
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Affiliation as printed
Universiteit Antwerpen, Antwerpen, Belgium
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Affiliation as printed
Vrije Universiteit Brussel, Brussel, Belgium
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Affiliation as printed
Vrije Universiteit Brussel, Brussel, Belgium
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Affiliation as printed
Vrije Universiteit Brussel, Brussel, Belgium
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Affiliation as printed
Vrije Universiteit Brussel, Brussel, Belgium
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Affiliation as printed
Vrije Universiteit Brussel, Brussel, Belgium
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Vrije Universiteit Brussel, Brussel, Belgium
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Affiliation as printed
Vrije Universiteit Brussel, Brussel, Belgium
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Vrije Universiteit Brussel, Brussel, Belgium
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Université Libre de Bruxelles, Bruxelles, Belgium
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Université Libre de Bruxelles, Bruxelles, Belgium
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Université Libre de Bruxelles, Bruxelles, Belgium
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Ghent University, Ghent, Belgium
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Ghent University, Ghent, Belgium
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Université Catholique de Louvain, Louvain-la-Neuve, Belgium
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Université Catholique de Louvain, Louvain-la-Neuve, Belgium
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Affiliation as printed
Université Catholique de Louvain, Louvain-la-Neuve, Belgium
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Affiliation as printed
Université Catholique de Louvain, Louvain-la-Neuve, Belgium
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Affiliation as printed
Université Catholique de Louvain, Louvain-la-Neuve, Belgium
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Affiliation as printed
Université Catholique de Louvain, Louvain-la-Neuve, Belgium
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Affiliation as printed
Université Catholique de Louvain, Louvain-la-Neuve, Belgium