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Published May 18, 2018 | Published + Submitted
Journal Article Open

Measurement of Prompt D^0 Meson Azimuthal Anisotropy in Pb-Pb Collisions at √s_(NN) = 5.02  TeV


The prompt D^0 meson azimuthal anisotropy coefficients, v_2 and v_3, are measured at midrapidity (|y|<1.0) in Pb-Pb collisions at a center-of-mass energy √s_(NN) = 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 v_2 coefficient is found to be positive throughout the p_T range studied. The first measurement of the prompt D0 meson v_3 coefficient is performed, and values up to 0.07 are observed for p_T around 4  GeV/c. Compared to measurements of charged particles, a similar p_T dependence, but smaller magnitude for p_T < 6  GeV/c, is found for prompt D^0 meson v_2 and v_3 coefficients. The results are consistent with the presence of collective motion of charm quarks at low p_T and a path length dependence of charm quark energy loss at high p_T, thereby providing new constraints on the theoretical description of the interactions between charm quarks and the quark-gluon plasma.

Additional Information

© 2018 Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Received 11 August 2017; revised manuscript received 6 March 2018; published 16 May 2018. We congratulate our colleagues in the CERN accelerator departments for the excellent performance of the LHC and thank the technical and administrative staffs at CERN and at other CMS institutes for their contributions to the success of the CMS effort. We thank E. Bratkovskaya, S. Cao, M. He, J. Liao, M. Nahrgang, R. Rapp, T. Song, and J. Xu for the inputs in comparing our measurements with their calculations. In addition, we gratefully acknowledge the computing centers and personnel of the Worldwide LHC Computing Grid for delivering so effectively the computing infrastructure essential to our analyses. Finally, we acknowledge the enduring support for the construction and operation of the LHC and the CMS detector provided by the following funding agencies: BMWFW and FWF (Austria); FNRS and FWO (Belgium); CNPq, CAPES, FAPERJ, and FAPESP (Brazil); MES (Bulgaria); CERN; CAS, MoST, and NSFC (China); COLCIENCIAS (Colombia); MSES and CSF (Croatia); RPF (Cyprus); SENESCYT (Ecuador); MoER, ERC IUT, and ERDF (Estonia); Academy of Finland, MEC, and HIP (Finland); CEA and CNRS/IN2P3 (France); BMBF, DFG, and HGF (Germany); GSRT (Greece); OTKA and NIH (Hungary); DAE and DST (India); IPM (Iran); SFI (Ireland); INFN (Italy); MSIP and NRF (Republic of Korea); LAS (Lithuania); MOE and UM (Malaysia); BUAP, CINVESTAV, CONACYT, LNS, SEP, and UASLP-FAI (Mexico); MBIE (New Zealand); PAEC (Pakistan); MSHE and NSC (Poland); FCT (Portugal); JINR (Dubna); MON, RosAtom, RAS, RFBR and RAEP (Russia); MESTD (Serbia); SEIDI, CPAN, PCTI and FEDER (Spain); Swiss Funding Agencies (Switzerland); MST (Taipei); ThEPCenter, IPST, STAR, and NSTDA (Thailand); TUBITAK and TAEK (Turkey); NASU and SFFR (Ukraine); STFC (United Kingdom); DOE and NSF (USA).

Attached Files

Published - PhysRevLett.120.202301.pdf

Submitted - 1708.03497.pdf


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August 19, 2023
October 18, 2023