Observation of forward neutron multiplicity dependence of dimuon acoplanarity in ultraperipheral Pb-Pb collisions at √sNN = 5.02 TeV

The first measurement of the dependence of γγ→μ+μ− production on the multiplicity of neutrons emitted very close to the beam direction in ultraperipheral heavy ion collisions is reported. Data for lead-lead interactions at √sNN=5.02TeV, with an integrated luminosity of approximately 1.5 nb−1, are co...

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Autores: CMS Collaboration, Cabrillo, I. J., Calderon, Alicia, Chazin Quero, B., Duarte Campderros, J., Fernández-García, Marcos, Fernández Manteca, P. J., Gómez, Gervasio, Martínez-Rivero, Celso, Martínez Ruiz del Arbol, P., Matorras, Francisco, Piedra, Jonatan, Prieels, C., Ricci-Tam, F., Rodrigo Anoro, Teresa, Ruiz Jimeno, Alberto, Scodellaro, Luca, Vila, Iván, Vizán, J.
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2021
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/260395
Acceso en línea:http://hdl.handle.net/10261/260395
Access Level:acceso abierto
Palabra clave:ddc:530
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network_name_str España
repository_id_str
spelling Observation of forward neutron multiplicity dependence of dimuon acoplanarity in ultraperipheral Pb-Pb collisions at √sNN = 5.02 TeVCMS CollaborationCabrillo, I. J.Calderon, AliciaChazin Quero, B.Duarte Campderros, J.Fernández-García, MarcosFernández Manteca, P. J.Gómez, GervasioMartínez-Rivero, CelsoMartínez Ruiz del Arbol, P.Matorras, FranciscoPiedra, JonatanPrieels, C.Ricci-Tam, F.Rodrigo Anoro, TeresaRuiz Jimeno, AlbertoScodellaro, LucaVila, IvánVizán, J.ddc:530The first measurement of the dependence of γγ→μ+μ− production on the multiplicity of neutrons emitted very close to the beam direction in ultraperipheral heavy ion collisions is reported. Data for lead-lead interactions at √sNN=5.02TeV, with an integrated luminosity of approximately 1.5 nb−1, are collected using the CMS detector at the LHC. The azimuthal correlations between the two muons in the invariant mass region 8<mμμ<60GeV are extracted for events including 0, 1, or at least 2 neutrons detected in the forward pseudorapidity range |η|>8.3. The back-to-back correlation structure from leading-order photon-photon scattering is found to be significantly broader for events with a larger number of emitted neutrons from each nucleus, corresponding to interactions with a smaller impact parameter. This observation provides a data-driven demonstration that the average transverse momentum of photons emitted from relativistic heavy ions has an impact parameter dependence. These results provide new constraints on models of photon-induced interactions in ultraperipheral collisions. They also provide a baseline to search for possible final-state effects on lepton pairs caused by traversing a quark-gluon plasma produced in hadronic heavy ion collisions.Funded by SCOAP3.CERN.Peer reviewedAmerican Physical SocietySCOAPCERNConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202220222021info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/260395reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttps://doi.org/10.1103/PhysRevLett.127.122001Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/2603952026-05-22T06:33:51Z
dc.title.none.fl_str_mv Observation of forward neutron multiplicity dependence of dimuon acoplanarity in ultraperipheral Pb-Pb collisions at √sNN = 5.02 TeV
title Observation of forward neutron multiplicity dependence of dimuon acoplanarity in ultraperipheral Pb-Pb collisions at √sNN = 5.02 TeV
spellingShingle Observation of forward neutron multiplicity dependence of dimuon acoplanarity in ultraperipheral Pb-Pb collisions at √sNN = 5.02 TeV
CMS Collaboration
ddc:530
title_short Observation of forward neutron multiplicity dependence of dimuon acoplanarity in ultraperipheral Pb-Pb collisions at √sNN = 5.02 TeV
title_full Observation of forward neutron multiplicity dependence of dimuon acoplanarity in ultraperipheral Pb-Pb collisions at √sNN = 5.02 TeV
title_fullStr Observation of forward neutron multiplicity dependence of dimuon acoplanarity in ultraperipheral Pb-Pb collisions at √sNN = 5.02 TeV
title_full_unstemmed Observation of forward neutron multiplicity dependence of dimuon acoplanarity in ultraperipheral Pb-Pb collisions at √sNN = 5.02 TeV
title_sort Observation of forward neutron multiplicity dependence of dimuon acoplanarity in ultraperipheral Pb-Pb collisions at √sNN = 5.02 TeV
dc.creator.none.fl_str_mv CMS Collaboration
Cabrillo, I. J.
Calderon, Alicia
Chazin Quero, B.
Duarte Campderros, J.
Fernández-García, Marcos
Fernández Manteca, P. J.
Gómez, Gervasio
Martínez-Rivero, Celso
Martínez Ruiz del Arbol, P.
Matorras, Francisco
Piedra, Jonatan
Prieels, C.
Ricci-Tam, F.
Rodrigo Anoro, Teresa
Ruiz Jimeno, Alberto
Scodellaro, Luca
Vila, Iván
Vizán, J.
author CMS Collaboration
author_facet CMS Collaboration
Cabrillo, I. J.
Calderon, Alicia
Chazin Quero, B.
Duarte Campderros, J.
Fernández-García, Marcos
Fernández Manteca, P. J.
Gómez, Gervasio
Martínez-Rivero, Celso
Martínez Ruiz del Arbol, P.
Matorras, Francisco
Piedra, Jonatan
Prieels, C.
Ricci-Tam, F.
Rodrigo Anoro, Teresa
Ruiz Jimeno, Alberto
Scodellaro, Luca
Vila, Iván
Vizán, J.
author_role author
author2 Cabrillo, I. J.
Calderon, Alicia
Chazin Quero, B.
Duarte Campderros, J.
Fernández-García, Marcos
Fernández Manteca, P. J.
Gómez, Gervasio
Martínez-Rivero, Celso
Martínez Ruiz del Arbol, P.
Matorras, Francisco
Piedra, Jonatan
Prieels, C.
Ricci-Tam, F.
Rodrigo Anoro, Teresa
Ruiz Jimeno, Alberto
Scodellaro, Luca
Vila, Iván
Vizán, J.
author2_role author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv SCOAP
CERN
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv ddc:530
topic ddc:530
description The first measurement of the dependence of γγ→μ+μ− production on the multiplicity of neutrons emitted very close to the beam direction in ultraperipheral heavy ion collisions is reported. Data for lead-lead interactions at √sNN=5.02TeV, with an integrated luminosity of approximately 1.5 nb−1, are collected using the CMS detector at the LHC. The azimuthal correlations between the two muons in the invariant mass region 8<mμμ<60GeV are extracted for events including 0, 1, or at least 2 neutrons detected in the forward pseudorapidity range |η|>8.3. The back-to-back correlation structure from leading-order photon-photon scattering is found to be significantly broader for events with a larger number of emitted neutrons from each nucleus, corresponding to interactions with a smaller impact parameter. This observation provides a data-driven demonstration that the average transverse momentum of photons emitted from relativistic heavy ions has an impact parameter dependence. These results provide new constraints on models of photon-induced interactions in ultraperipheral collisions. They also provide a baseline to search for possible final-state effects on lepton pairs caused by traversing a quark-gluon plasma produced in hadronic heavy ion collisions.
publishDate 2021
dc.date.none.fl_str_mv 2021
2022
2022
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Publisher's version
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/260395
url http://hdl.handle.net/10261/260395
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv https://doi.org/10.1103/PhysRevLett.127.122001
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv American Physical Society
publisher.none.fl_str_mv American Physical Society
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,812429

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