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Abstract: The strong Coulomb field created in ultrarelativistic heavy ion collisions is expected to produce a rapidity-dependent difference (_v2) in the second Fourier coefficient of the azimuthal distribution (elliptic flow, v2) between D0(uc) and D0(uc) mesons. Motivated by the search for evidence of this field, the CMS detector at the LHC is used to perform the first measurement of _v2. The rapidity-averaged value is found to be __v2_ =0.001 ±0.001(stat)±0.003(syst)in PbPb collisions at ?sNN=5.02TeV. In addition, the influence of the collision geometry is explored by measuring the D0and D0mesons v2and triangular flow coefficient (v3) as functions of rapidity, transverse momentum (pT), and event centrality (a measure of the overlap of the two Pb nuclei). A clear centrality dependence of prompt D0meson v2values is observed, while the v3is largely independent of centrality. These trends are consistent with expectations of flow driven by the initial-state geometry.
Fuente: Physics Letters, Section B, 2021, 816, 136253
Publisher: Elsevier
Publication date: 10/05/2021
No. of pages: 25
Publication type: Article
DOI: 10.1016/j.physletb.2021.136253
ISSN: 0370-2693,1873-2445
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SIRUNYAN, A.M.
JOSE IBAN CABRILLO BARTOLOME
ALICIA CALDERON TAZON
JORGE DUARTE CAMPDERROS
MARCOS FERNANDEZ GARCIA
PEDRO JOSE FERNANDEZ MANTECA
ANDREA GARCIA ALONSO
GERVASIO GOMEZ GRAMUGLIO
CELSO MARTINEZ RIVERO
PABLO MARTINEZ RUIZ DEL ARBOL
FRANCISCO MATORRAS WEINIG
JONATAN PIEDRA GOMEZ
CEDRIC GERALD PRIEELS
FRANCESCA SHUN-NING ANNAROSA RICCI-TAM
MARIA TERESA RODRIGO ANORO
ALBERTO RUIZ JIMENO
LORENZO RUSSO
LUCA SCODELLARO
IVAN VILA ALVAREZ
JESUS MANUEL VIZAN GARCIA
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