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001-es BibID:	BIBFORM119260
035-os BibID:	(Scopus)85135202250 (WoS)000824635900006
Első szerző:	Tumasyan, Armen
Cím:	Probing charm quark dynamics via multiparticle correlations in Pb-Pb collisions at root{s}_(NN) = 5.02 TeV / A. Tumasyan, CMS Collaboration
Dátum:	2022
ISSN:	0031-9007
Megjegyzések:	Multiparticle azimuthal correlations of prompt D^0 mesons are measured in Pb-Pb collisions at a nucleon-nucleon center-of-mass energy of root{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 D0 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.
Tárgyszavak:	Természettudományok Fizikai tudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk Astrophysics Binary alloys Bosons Charged particles Colliding beam accelerators Fourier analysis Hadrons Lead alloys Azimuthal correlations Center-of-mass energies Charm quarks Multi-particle correlation Multiparticles Nucleon-nucleon Pb-Pb collisions Quark dynamics Transverse momenta Energy dissipation
Megjelenés:	Physical Review Letters. - 129 : 2 (2022), p. 1-19. -
További szerzők:	Bartók Márton (fizikus) Karancsi János (1987-) (fizikus) Raics Péter (1944-) (fizikus) Trócsányi Zoltán (1961-) (fizikus) Ujvári Balázs (1977-) (fizikus) CMS Collaboration
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
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