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Correlations between jets and charged particles in PbPb and pp collisions at sNN=2.76 TeV

Abstract: The quark-gluon plasma is studied via medium-induced changes to correlations between jets and charged particles in PbPb collisions compared to pp reference data. This analysis uses data sets from PbPb and pp collisions with integrated luminosities of 166 ?b?1 and 5.3 pb?1, respectively, collected at (Formula presented.) TeV. The angular distributions of charged particles are studied as a function of relative pseudorapidity (??) and relative azimuthal angle (??) with respect to reconstructed jet directions. Charged particles are correlated with all jets with transverse momentum (pT) above 120 GeV, and with the leading and subleading jets (the highest and second-highest in pT, respectively) in a selection of back-to-back dijet events. Modifications in PbPb data relative to pp reference data are characterized as a function of PbPb collision centrality and charged particle pT. A centrality-dependent excess of low-pT particles is present for all jets studied, and is most pronounced in the most central events. This excess of low-pT particles follows a Gaussian-like distribution around the jet axis, and extends to large relative angles of ?? ? 1 and ?? ? 1.

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

 Fuente: Journal of High Energy Physics, Vol. 2016, Num. 2, Art. Num. 156

Editorial: Springer Verlag

 Fecha de publicación: 01/02/2016

Nº de páginas: 39

Tipo de publicación: Artículo de Revista

 DOI: 10.1007/JHEP02(2016)156

ISSN: 1126-6708,1029-8479

Url de la publicación: https://doi.org/10.1007/JHEP02(2016)156

Autores/as

KHACHATRYAN, VLADIMIR

JUAN RAMON CASTIÑEIRAS DE SAA

PABLO DE CASTRO MANZANO

JUAN GARCIA FERRERO

MARIA AMPARO LOPEZ VIRTO

RAFAEL JOSE MARCO DE LUCAS

ANA YAIZA RODRIGUEZ MARRERO