Suppression and azimuthal anisotropy of prompt and nonprompt J / ψ production in PbPb collisions at √sNN=2.76TeV

CMS Collaboration

doi:10.1140/epjc/s10052-017-4781-1

Suppression and azimuthal anisotropy of prompt and nonprompt J / ψ production in PbPb collisions at √sNN=2.76TeV

CMS Collaboration

Yerevan Physics Institute
Institut für Hochenergiephysik
Vienna University of Technology
Institute for Nuclear Problems of Belarusian State University
National Centre for Particle and High Energy Physics
Université Paris-Saclay
European Organization for Nuclear Research
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University of Cyprus
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Joint Institute for Nuclear Research, Dubna
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Panjab University
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99 Citations (Scopus)

Résumé

The nuclear modification factor R_AA and the azimuthal anisotropy coefficient v₂ of prompt and nonprompt (i.e. those from decays of b hadrons) J / ψ mesons, measured from PbPb and pp collisions at sNN=2.76TeV at the LHC, are reported. The results are presented in several event centrality intervals and several kinematic regions, for transverse momenta p_T> 6.5 GeV/c and rapidity | y| < 2.4 , extending down to p_T= 3 GeV/c in the 1.6 < | y| < 2.4 range. The v₂ of prompt J / ψ is found to be nonzero, but with no strong dependence on centrality, rapidity, or p_T over the full kinematic range studied. The measured v₂ of nonprompt J / ψ is consistent with zero. The R_AA of prompt J / ψ exhibits a suppression that increases from peripheral to central collisions but does not vary strongly as a function of either y or p_T in the fiducial range. The nonprompt J / ψR_AA shows a suppression which becomes stronger as rapidity or p_T increases. The v₂ and R_AA of open and hidden charm, and of open charm and beauty, are compared.

langue originale	Anglais
Numéro d'article	252
journal	European Physical Journal C
Volume	77
Numéro de publication	4
Les DOIs	https://doi.org/10.1140/epjc/s10052-017-4781-1
état	Publié - 1 avr. 2017

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10.1140/epjc/s10052-017-4781-1

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@article{093a65118c46487d867e0a79839e1022,

title = "Suppression and azimuthal anisotropy of prompt and nonprompt J / ψ production in PbPb collisions at √sNN=2.76TeV",

abstract = "The nuclear modification factor RAA and the azimuthal anisotropy coefficient v2 of prompt and nonprompt (i.e. those from decays of b hadrons) J / ψ mesons, measured from PbPb and pp collisions at sNN=2.76TeV at the LHC, are reported. The results are presented in several event centrality intervals and several kinematic regions, for transverse momenta pT> 6.5 GeV/c and rapidity | y| < 2.4 , extending down to pT= 3 GeV/c in the 1.6 < | y| < 2.4 range. The v2 of prompt J / ψ is found to be nonzero, but with no strong dependence on centrality, rapidity, or pT over the full kinematic range studied. The measured v2 of nonprompt J / ψ is consistent with zero. The RAA of prompt J / ψ exhibits a suppression that increases from peripheral to central collisions but does not vary strongly as a function of either y or pT in the fiducial range. The nonprompt J / ψRAA shows a suppression which becomes stronger as rapidity or pT increases. The v2 and RAA of open and hidden charm, and of open charm and beauty, are compared.",

author = "\{CMS Collaboration\} and V. Khachatryan and Sirunyan, \{A. M.\} and A. Tumasyan and W. Adam and E. Asilar and T. Bergauer and J. Brandstetter and E. Brondolin and M. Dragicevic and J. Er{\"o} and M. Flechl and M. Friedl and R. Fr{\"u}hwirth and Ghete, \{X. M.\} and C. Hartl and N. H{\"o}rmann and J. Hrubec and M. Jeitler and A. K{\"o}nig and I. Kr{\"a}tschmer and D. Liko and T. Matsushita and I. Mikulec and D. Rabady and N. Rad and B. Rahbaran and H. Rohringer and J. Schieck and J. Strauss and W. Waltenberger and Wulz, \{C. E.\} and O. Dvornikov and V. Makarenko and V. Zykunov and V. Mossolov and N. Shumeiko and Gonzalez, \{J. Suarez\} and A. Zghiche and F. Beaudette and C. Charlot and O. Davignon and \{Granier de Cassagnac\}, R. and M. Nguyen and C. Ochando and P. Paganini and R. Salerno and Y. Sirois and A. Zabi and Sauvan, \{J. B.\} and \{De Wit\}, A.",

note = "Publisher Copyright: {\textcopyright} 2017, CERN for the benefit of the CMS collaboration.",

year = "2017",

month = apr,

day = "1",

doi = "10.1140/epjc/s10052-017-4781-1",

language = "English",

volume = "77",

journal = "European Physical Journal C",

issn = "1434-6044",

publisher = "Springer Nature",

number = "4",

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TY - JOUR

T1 - Suppression and azimuthal anisotropy of prompt and nonprompt J / ψ production in PbPb collisions at √sNN=2.76TeV

AU - CMS Collaboration

AU - Khachatryan, V.

AU - Sirunyan, A. M.

AU - Tumasyan, A.

AU - Adam, W.

AU - Asilar, E.

AU - Bergauer, T.

AU - Brandstetter, J.

AU - Brondolin, E.

AU - Dragicevic, M.

AU - Erö, J.

AU - Flechl, M.

AU - Friedl, M.

AU - Frühwirth, R.

AU - Ghete, X. M.

AU - Hartl, C.

AU - Hörmann, N.

AU - Hrubec, J.

AU - Jeitler, M.

AU - König, A.

AU - Krätschmer, I.

AU - Liko, D.

AU - Matsushita, T.

AU - Mikulec, I.

AU - Rabady, D.

AU - Rad, N.

AU - Rahbaran, B.

AU - Rohringer, H.

AU - Schieck, J.

AU - Strauss, J.

AU - Waltenberger, W.

AU - Wulz, C. E.

AU - Dvornikov, O.

AU - Makarenko, V.

AU - Zykunov, V.

AU - Mossolov, V.

AU - Shumeiko, N.

AU - Gonzalez, J. Suarez

AU - Zghiche, A.

AU - Beaudette, F.

AU - Charlot, C.

AU - Davignon, O.

AU - Granier de Cassagnac, R.

AU - Nguyen, M.

AU - Ochando, C.

AU - Paganini, P.

AU - Salerno, R.

AU - Sirois, Y.

AU - Zabi, A.

AU - Sauvan, J. B.

AU - De Wit, A.

PY - 2017/4/1

Y1 - 2017/4/1

N2 - The nuclear modification factor RAA and the azimuthal anisotropy coefficient v2 of prompt and nonprompt (i.e. those from decays of b hadrons) J / ψ mesons, measured from PbPb and pp collisions at sNN=2.76TeV at the LHC, are reported. The results are presented in several event centrality intervals and several kinematic regions, for transverse momenta pT> 6.5 GeV/c and rapidity | y| < 2.4 , extending down to pT= 3 GeV/c in the 1.6 < | y| < 2.4 range. The v2 of prompt J / ψ is found to be nonzero, but with no strong dependence on centrality, rapidity, or pT over the full kinematic range studied. The measured v2 of nonprompt J / ψ is consistent with zero. The RAA of prompt J / ψ exhibits a suppression that increases from peripheral to central collisions but does not vary strongly as a function of either y or pT in the fiducial range. The nonprompt J / ψRAA shows a suppression which becomes stronger as rapidity or pT increases. The v2 and RAA of open and hidden charm, and of open charm and beauty, are compared.

AB - The nuclear modification factor RAA and the azimuthal anisotropy coefficient v2 of prompt and nonprompt (i.e. those from decays of b hadrons) J / ψ mesons, measured from PbPb and pp collisions at sNN=2.76TeV at the LHC, are reported. The results are presented in several event centrality intervals and several kinematic regions, for transverse momenta pT> 6.5 GeV/c and rapidity | y| < 2.4 , extending down to pT= 3 GeV/c in the 1.6 < | y| < 2.4 range. The v2 of prompt J / ψ is found to be nonzero, but with no strong dependence on centrality, rapidity, or pT over the full kinematic range studied. The measured v2 of nonprompt J / ψ is consistent with zero. The RAA of prompt J / ψ exhibits a suppression that increases from peripheral to central collisions but does not vary strongly as a function of either y or pT in the fiducial range. The nonprompt J / ψRAA shows a suppression which becomes stronger as rapidity or pT increases. The v2 and RAA of open and hidden charm, and of open charm and beauty, are compared.

U2 - 10.1140/epjc/s10052-017-4781-1

DO - 10.1140/epjc/s10052-017-4781-1

M3 - Article

AN - SCOPUS:85018514376

SN - 1434-6044

VL - 77

JO - European Physical Journal C

JF - European Physical Journal C

IS - 4

M1 - 252

ER -

Suppression and azimuthal anisotropy of prompt and nonprompt J / ψ production in PbPb collisions at √sNN=2.76TeV

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