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Measurement of the centrality dependence of J/psi yields and observation of Z production in lead-lead collisions with the ATLAS detector at the LHC

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Measurement of the centrality dependence of J/psi yields and observation of Z production in lead-lead collisions with the ATLAS detector at the LHC

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dc.contributor.author	ATLAS Collaboration
dc.contributor.author	Amorós Vicente, Gabriel
dc.contributor.author	Cabrera Urbán, Susana
dc.contributor.author	Castillo Giménez, María Victoria
dc.contributor.author	Costa Mezquita, María José
dc.contributor.author	Escobar Ibañez, Carlos
dc.contributor.author	Ferrer Soria, Antonio
dc.contributor.author	Mitsou, Vasiliki
dc.contributor.author	Fiorini, Luca
dc.contributor.author	Fuster Verdú, Juan A.
dc.contributor.author	García García, Carmen
dc.contributor.author	González de la Hoz, Santiago
dc.contributor.author	Hernández Jiménez, Yesenia
dc.contributor.author	Higón Rodríguez, Emilio
dc.contributor.author	Irles Quiles, Adrián
dc.contributor.author	Kaci, Mohammed
dc.contributor.author	Lacasta Llácer, Carlos
dc.contributor.author	Lacuesta Miquel, Vicente
dc.contributor.author	Martí García, Salvador
dc.contributor.author	Miñano Moya, Mercedes
dc.date.accessioned	2014-04-30T11:55:04Z
dc.date.available	2014-04-30T11:55:04Z
dc.date.issued	2011
dc.identifier.citation	ATLAS Collaboration Amorós Vicente, Gabriel Cabrera Urbán, Susana Castillo Giménez, María Victoria Costa Mezquita, María José Escobar Ibañez, Carlos Ferrer Soria, Antonio Mitsou, Vasiliki Fiorini, Luca Fuster Verdú, Juan A. García García, Camen González de la Hoz, Santiago Hernández Jiménez, Yesenia Higón Rodríguez, Emilio Irles Quiles, Adrián Kaci, Mohammed Lacasta Llácer, Carlos Lacuesta Miquel, Vicente Martí García, Salvador Miñano Moya, Mercedes 2011 Measurement of the centrality dependence of J/psi yields and observation of Z production in lead-lead collisions with the ATLAS detector at the LHC Physics Letters B 697 4 294 312
dc.identifier.uri	http://hdl.handle.net/10550/34808
dc.description.abstract	Using the ATLAS detector, a centrality-dependent suppression has been observed in the yield of J/psi mesons produced in the collisions of lead ions at the Large Hadron Collider. In a sample of minimum-bias lead-lead collisions at a nucleon-nucleon centre of mass energy root s(NN) = 2.76 TeV, corresponding to an integrated luminosity of about 6.7 μb(-1), J/psi mesons are reconstructed via their decays to mu(+)mu(-) pairs. The measured J/psi yield, normalized to the number of binary nucleon-nucleon collisions, is found to significantly decrease from peripheral to central collisions. The centrality dependence is found to be qualitatively similar to the trends observed at previous, lower energy experiments. The same sample is used to reconstruct Z bosons in the mu(+)mu(-) final state, and a total of 38 candidates are selected in the mass window of 66 to 116 GeV. The relative Z yields as a function of centrality are also presented, although no conclusion can be inferred about their scaling with the number of binary collisions, because of limited statistics. This analysis provides the first results on J/psi and Z production in lead-lead collisions at the LHC.
dc.relation.ispartof	Physics Letters B, 2011, vol. 697, num. 4, p. 294-312
dc.subject	Física nuclear
dc.title	Measurement of the centrality dependence of J/psi yields and observation of Z production in lead-lead collisions with the ATLAS detector at the LHC
dc.type	journal article	es_ES
dc.date.updated	2014-04-30T11:55:04Z
dc.identifier.doi	10.1016/j.physletb.2011.02.006
dc.identifier.idgrec	068203
dc.rights.accessRights	open access	es_ES
dc.identifier.url	10.1016/j.physletb.2011.02.006