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Abstract: The Fourier coefficients v2 and v3 characterizing the anisotropy of the azimuthal distribution of charged particles produced in PbPb collisions at sNN=5.02TeV are measured with data collected by the CMS experiment. The measurements cover a broad transverse momentum range, 110GeV/c range, where anisotropic azimuthal distributions should reflect the path-length dependence of parton energy loss in the created medium. Results are presented in several bins of PbPb collision centrality, spanning the 60% most central events. The v2 coefficient is measured with the scalar product and the multiparticle cumulant methods, which have different sensitivities to initial-state fluctuations. The values from both methods remain positive up to pT?60?80GeV/c, in all examined centrality classes. The v3 coefficient, only measured with the scalar product method, tends to zero for pT?20GeV/c. Comparisons between theoretical calculations and data provide new constraints on the path-length dependence of parton energy loss in heavy ion collisions and highlight the importance of the initial-state fluctuations.
Fuente: Physics Letters B 776 (2018) 195-216
Editorial: Elsevier
Fecha de publicación: 10/01/2018
Nº de páginas: 22
Tipo de publicación: Artículo de Revista
DOI: 10.1016/j.physletb.2017.11.041
ISSN: 0370-2693,1873-2445
Url de la publicación: https://doi.org/10.1016/j.physletb.2017.11.041
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SIRUNYAN, A. M.
JOSE IBAN CABRILLO BARTOLOME
ALICIA CALDERON TAZON
ESTEBAN CURRAS RIVERA
MARCOS FERNANDEZ GARCIA
JUAN GARCIA FERRERO
GERVASIO GOMEZ GRAMUGLIO
MARIA AMPARO LOPEZ VIRTO
JESUS MARCO DE LUCAS
CELSO MARTINEZ RIVERO
FRANCISCO MATORRAS WEINIG
JONATAN PIEDRA GOMEZ
MARIA TERESA RODRIGO ANORO
ALBERTO RUIZ JIMENO
LUCA SCODELLARO
NICOLO TREVISANI
IVAN VILA ALVAREZ
ROCIO VILAR CORTABITARTE
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