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

CERN
A. Alikhanian Yerevan Institute of Physics
Austrian Academy of Sciences
Saha Institute of Nuclear Physics
TU Wien
Belarusian State University
University of Antwerp
Vrije Universiteit Brussel
Université libre de Bruxelles
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Institut de Recherches Subatomiques
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Universidade Federal de Pelotas
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Bulgarian Academy of Sciences
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Beihang University
CAS - Institute of High Energy Physics
Quaid-I-Azam University
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German Electron Synchrotron
Texas Tech University
National Institute for Nuclear Physics
Universidad de los Andes Colombia
University of Split
Ruder Boskovic Institute
University of Cyprus
Charles University
Joint Institute for Nuclear Research
Universidad San Francisco de Quito
Academy of Scientific Research and Technology
Cairo University
Al-Fayoum University
The British University in Egypt
Ain Shams University
National Institute of Chemical Physics and Biophysics, Tallinn
University of Helsinki
Lappeenranta-Lahti University of Technology
Université Paris-Saclay
Laboratoire Leprince-Ringuet
Université de Haute-Alsace
Chonnam National University
Institut National de Physique Nucléaire et de Physique des Particules (IN2P3)
Universite Claude Bernard Lyon 1
Lomonosov Moscow State University
Georgian Technical University
Ivane Javakhishvili Tbilisi State University
RWTH Aachen University
University of Hamburg
Brandenburg University of Technology
Sungkyunkwan University
Karlsruhe Institute of Technology
University of California at Los Angeles
Demokritos National Centre for Scientific Research
National and Kapodistrian University of Athens
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Eötvös Loránd University
Wigner Research Centre for Physics
Institute for Nuclear Research
University of Malaya
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National Institute of Science Education and Research
Indian Institute of Science Education and Research Bhopal
Institute of Physics Bhubaneswar
Panjab University
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University of California at San Diego
Northwestern University
Indian Institute of Technology Madras
Bhabha Atomic Research Centre
Tata Institute of Fundamental Research
Fermilab
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99 Citas (Scopus)

Resumen

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.

Idioma original	Inglés
Número de artículo	252
Publicación	European Physical Journal C
Volumen	77
N.º	4
DOI	https://doi.org/10.1140/epjc/s10052-017-4781-1
Estado	Publicada - 1 abr 2017
Publicado de forma externa	Sí

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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 = "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 S. Thakur and \{CMS Collaboration\}",

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

year = "2017",

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

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

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 - Thakur, S.

AU - CMS Collaboration

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.

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JO - European Physical Journal C

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

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