Measurement of prompt $D^0$ meson azimuthal anisotropy in Pb-Pb collisions at $\sqrt{{s}_{NN}}$ = 5.02 TeV

• Published in: Physical review letters Vol. 120; no. 20
• Main Authors: Sirunyan, Albert M, Tumasyan, Armen, Adam, Wolfgang, Ambrogi, Federico, Asilar, Ece, Bergauer, Thomas, Brandstetter, Johannes, Brondolin, Erica, Dragicevic, Marko, Erö, Janos, Flechl, Martin, Friedl, Markus, Fruehwirth, Rudolf, Ghete, Vasile Mihai, Grossmann, Johannes, Hrubec, Josef, Jeitler, Manfred, König, Axel, Krammer, Natascha, Krätschmer, Ilse, Liko, Dietrich, Madlener, Thomas, Mikulec, Ivan, Pree, Elias, Rabady, Dinyar, Rad, Navid, Rohringer, Herbert, Schieck, Jochen, Schöfbeck, Robert, Spanring, Markus, Spitzbart, Daniel, Waltenberger, Wolfgang, Wittmann, Johannes, Wulz, Claudia-Elisabeth, Zarucki, Mateusz, Chekhovsky, Vladimir, Mossolov, Vladimir, Suarez Gonzalez, Juan, de Wolf, Eddi A, Di Croce, Davide, Janssen, Xavier, Lauwers, Jasper, van Haevermaet, Hans, van Mechelen, Pierre, van Remortel, Nick, Abu Zeid, Shimaa, Blekman, Freya, d'Hondt, Jorgen, de Bruyn, Isabelle, de Clercq, Jarne, Deroover, Kevin, Flouris, Giannis, Lontkovskyi, Denys, Lowette, Steven, Moortgat, Seth, Moreels, Lieselotte, Python, Quentin, Skovpen, Kirill, Tavernier, Stefaan, van Doninck, Walter, van Mulders, Petra, van Parijs, Isis, Brun, Hugues, Clerbaux, Barbara, de Lentdecker, Gilles, Delannoy, Hugo, Fasanella, Giuseppe, Favart, Laurent, Goldouzian, Reza, Grebenyuk, Anastasia, Karapostoli, Georgia, Lenzi, Thomas, Luetic, Jelena, Maerschalk, Thierry, Marinov, Andrey, Randle-Conde, Aidan, Seva, Tomislav, Vander Velde, Catherine, Vanlaer, Pascal, Vannerom, David, Yonamine, Ryo, Zenoni, Florian, Zhang, Fengwangdong, Cimmino, Anna, Cornelis, Tom, Dobur, Didar, Fagot, Alexis, Gul, Muhammad, Khvastunov, Illia, Poyraz, Deniz, Roskas, Christos, Salva Diblen, Sinem, Tytgat, Michael, Verbeke, Willem, Zaganidis, Nicolas, Bakhshiansohi, Hamed, Bondu, Olivier, Brochet, Sébastien, Bruno, Giacomo, Caudron, Adrien
• Format: Journal Article
• Language: English
• Published: American Physical Society 2018
• Subjects: Nuclear Experiment; Physics; transverse momentum; experimental results; path length: dependence; numerical calculations; angular distribution: anisotropy; quark: energy loss; CMS; charged particle; CERN LHC Coll; D0; lead; hadronic decay; 5020 GeV/nucleon; charm; quark gluon: plasma; invariance
• ISSN: 0031-9007; 1079-7114
• DOI: 10.1103/PhysRevLett.120.202301

The prompt D0 meson azimuthal anisotropy coefficients, v2 and v3, are measured at midrapidity (|y|<1.0) in Pb-Pb collisions at a center-of-mass energy sNN=5.02  TeV per nucleon pair with data collected by the CMS experiment. The measurement is performed in the transverse momentum (pT) range of 1 to 40  GeV/c, for central and midcentral collisions. The v2 coefficient is found to be positive throughout the pT range studied. The first measurement of the prompt D0 meson v3 coefficient is performed, and values up to 0.07 are observed for pT around 4  GeV/c. Compared to measurements of charged particles, a similar pT dependence, but smaller magnitude for pT<6  GeV/c, is found for prompt D0 meson v2 and v3 coefficients. The results are consistent with the presence of collective motion of charm quarks at low pT and a path length dependence of charm quark energy loss at high pT, thereby providing new constraints on the theoretical description of the interactions between charm quarks and the quark-gluon plasma.