Measurement of prompt D-0 and D-0 meson azimuthal anisotropy and search for strong electric fields in PbPb collisions at root S-NN=5.02 TeV

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 f...

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Detalles Bibliográficos
Autores: Sirunyan, A.M., Cabrillo Bartolomé, José Iban|||0000-0002-0367-4022, Calderón Tazón, Alicia|||0000-0002-7205-2040, Chazin Quero, Bárbara, Duarte Campderros, Jorge|||0000-0003-0687-5214, Fernández García, Marcos|||0000-0002-4824-1087, Fernández Manteca, Pedro José|||0000-0003-2566-7496, García Alonso, Andrea, Gómez Gramuglio, Gervasio|||0000-0002-1077-6553, Martínez Rivero, Celso, Martínez Ruiz del Árbol, Pablo|||0000-0002-7737-5121, Matorras Weinig, Francisco|||0000-0003-4295-5668, Piedra Gómez, Jonatan|||0000-0002-9157-1700, Prieëls, Cedric, Ricci-Tam, Francesca Shun-Ning Annarosa, Rodrigo Anoro, Teresa, Ruiz Jimeno, Alberto|||0000-0002-3639-0368, Russo, Lorenzo, Scodellaro, Luca|||0000-0002-4974-8330, Vila Álvarez, Iván |||0000-0002-6797-7209, Vizán García, Jesús Manuel|||0000-0002-6823-8854
Tipo de recurso: artículo
Fecha de publicación:2021
País:España
Institución:Universidad de Cantabria (UC)
Repositorio:UCrea Repositorio Abierto de la Universidad de Cantabria
Idioma:inglés
OAI Identifier:oai:repositorio.unican.es:10902/24654
Acceso en línea:http://hdl.handle.net/10902/24654
Access Level:acceso abierto
Palabra clave:CMS
Heavy-flavor
Charm
Electromagnetic fields
Descripción
Sumario: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.

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