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Azimuthal anisotropy of charged particles at high transverse momenta in Pb-Pb collisions at vs NN=2.76TeV

Abstract: The azimuthal anisotropy of charged particles in Pb-Pb collisions at ?sNN=2.76??TeV is measured with the CMS detector at the LHC over an extended transverse momentum (pT) range up to approximately 60??GeV/c. The data cover both the low-pT region associated with hydrodynamic flow phenomena and the high-pT region where the anisotropies may reflect the path-length dependence of parton energy loss in the created medium. The anisotropy parameter (v2) of the particles is extracted by correlating charged tracks with respect to the event-plane reconstructed by using the energy deposited in forward-angle calorimeters. For the six bins of collision centrality studied, spanning the range of 0?60% most-central events, the observed v2 values are found to first increase with pT, reaching a maximum around pT=3??GeV/c, and then to gradually decrease to almost zero, with the decline persisting up to at least pT=40??GeV/c over the full centrality range measured.

Otras publicaciones de la misma revista o congreso con autores/as de la Universidad de Cantabria

 Autoría: Chatrchyan S., Khachatryan V., Sirunyan A.M., Tumasyan A., Adam W., Bergauer T., Dragicevic M., Erö J., Fabjan C., Friedl M., Frühwirth R., Ghete V.M., Hammer J., Hörmann N., Hrubec J., Jeitler M., Kiesenhofer W., Krammer M., Liko D., Mikulec I., Pernicka M., Rahbaran B., Rohringer C., Rohringer H., Schöfbeck R., Strauss J., Taurok A., Teischinger F., Wagner P., Waltenberger W., Walzel G., Widl E., Wulz C.E., Mossolov V., Shumei

 Fuente: Physical Review Letters, 2012,109, 022301

Editorial: American Physical Society

 Fecha de publicación: 01/07/2012

Nº de páginas: 15

Tipo de publicación: Artículo de Revista

 DOI: 10.1103/PhysRevLett.109.022301

ISSN: 0031-9007,1079-7114

Url de la publicación: https://doi.org/10.1103/PhysRevLett.109.022301

Autores/as

SHANHUEI CHUANG

MARTA FELCINI

CLARA JORDA LOPE

PATRICIA LOBELLE PARDO

MARIA AMPARO LOPEZ VIRTO

RAFAEL JOSE MARCO DE LUCAS

FRANCISCA JAVIELA MUÑOZ SANCHEZ

ANA YAIZA RODRIGUEZ MARRERO

MARIA DEL MAR SOBRON SAÑUDO