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Measurement of the nuclear modification factor and prompt charged particle production in p-Pb and pp Collisions at sqrt[s_{NN}]=5  TeV

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LHCb Collaboration (Including: Back, J. J., Blake, Thomas, Brossa Gonzalo, A., Cicala, M. F., Costa Sobral, C. M. , Garcia Martin, L. M., Gershon, T. J., Hunter, R. J., Jones, T. P., Kenzie, M., Kreps, Michal, Latham, Thomas, Lupton, Oliver, Millard, E., Morris, A. G., Pagare, B., Ramos Pernas, M., Sahoo, Niladri and Vesterinen, M.). (2022) Measurement of the nuclear modification factor and prompt charged particle production in p-Pb and pp Collisions at sqrt[s_{NN}]=5  TeV. Physical Review Letters, 128 (14). 142004. doi:10.1103/PhysRevLett.128.142004 ISSN 0031-9007.

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Official URL: https://doi.org/10.1103/PhysRevLett.128.142004

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Abstract

The production of prompt charged particles in proton-lead collisions and in proton-proton collisions at the nucleon-nucleon center-of-mass energy √sNN=5  TeV is studied at LHCb as a function of pseudorapidity (η) and transverse momentum (pT) with respect to the proton beam direction. The nuclear modification factor for charged particles is determined as a function of η between −4.8<η<−2.5 (backward region) and 2.0<η<4.8 (forward region), and pT between 0.2<pT<8.0  GeV/c. The results show a suppression of charged particle production in proton-lead collisions relative to proton-proton collisions in the forward region and an enhancement in the backward region for pT larger than 1.5  GeV/c. This measurement constrains nuclear PDFs and saturation models at previously unexplored values of the parton momentum fraction down to 10−6.

Item Type: Journal Article
Subjects: Q Science > QC Physics
Divisions: Faculty of Science, Engineering and Medicine > Science > Physics
Library of Congress Subject Headings (LCSH): Proton-proton interactions, Particles (Nuclear physics), Proton beams, Quantum chromodynamics
Journal or Publication Title: Physical Review Letters
Publisher: American Physical Society
ISSN: 0031-9007
Official Date: 8 April 2022
Dates:
DateEvent
8 April 2022Published
14 February 2022Accepted
Volume: 128
Number: 14
Article Number: 142004
DOI: 10.1103/PhysRevLett.128.142004
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Open Access (Creative Commons)
Date of first compliant deposit: 24 May 2022
Date of first compliant Open Access: 24 May 2022
RIOXX Funder/Project Grant:
Project/Grant IDRIOXX Funder NameFunder ID
UNSPECIFIEDCERNhttp://dx.doi.org/10.13039/100012470
UNSPECIFIEDCoordenação de Aperfeiçoamento de Pessoal de Nível Superiorhttp://dx.doi.org/10.13039/501100002322
UNSPECIFIEDConselho Nacional de Desenvolvimento Científico e Tecnológicohttp://dx.doi.org/10.13039/501100003593
UNSPECIFIEDFundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeirohttp://dx.doi.org/10.13039/501100004586
UNSPECIFIEDFinanciadora de Estudos e Projetoshttp://dx.doi.org/10.13039/501100004809
UNSPECIFIEDMinistry of Science and Technology of the People's Republic of Chinahttp://dx.doi.org/10.13039/501100002855
UNSPECIFIED[NSFC] National Natural Science Foundation of Chinahttp://dx.doi.org/10.13039/501100001809
UNSPECIFIED[CNRS] Centre National de la Recherche Scientifiquehttp://dx.doi.org/10.13039/501100004794
UNSPECIFIEDBundesministerium für Bildung und Forschunghttp://dx.doi.org/10.13039/501100002347
UNSPECIFIED[DFG] Deutsche Forschungsgemeinschafthttp://dx.doi.org/10.13039/501100001659
UNSPECIFIEDMax-Planck-Gesellschafthttp://dx.doi.org/10.13039/501100004189
UNSPECIFIED[INFN] Instituto Nazionale di Fisica Nuclearehttp://dx.doi.org/10.13039/501100004007
UNSPECIFIED[NWO] Nederlandse Organisatie voor Wetenschappelijk Onderzoekhttp://dx.doi.org/10.13039/501100003246
UNSPECIFIEDMinisterstwo Nauki i Szkolnictwa Wyższegohttp://dx.doi.org/10.13039/501100004569
UNSPECIFIEDNarodowe Centrum Naukihttp://dx.doi.org/10.13039/501100004281
UNSPECIFIEDMinisterul Educaţiei Naţionalehttp://dx.doi.org/10.13039/501100003766
UNSPECIFIEDMinistry of Science and Higher Education of the Russian Federationhttps://minobrnauki.gov.ru/
UNSPECIFIEDMinisterio de Ciencia e Innovaciónhttp://dx.doi.org/10.13039/501100004837
UNSPECIFIED[SNSF] Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschunghttp://dx.doi.org/10.13039/501100001711
UNSPECIFIED[SERI] Staatssekretariat für Bildung, Forschung und Innovationhttp://dx.doi.org/10.13039/501100007352
UNSPECIFIEDNational Academy of Sciences of Ukrainehttp://dx.doi.org/10.13039/501100004742
UNSPECIFIED[STFC] Science and Technology Facilities Councilhttp://dx.doi.org/10.13039/501100000271
UNSPECIFIEDU.S. Department of Energyhttp://dx.doi.org/10.13039/100000015
UNSPECIFIED[NSF] National Science Foundation (US)http://dx.doi.org/10.13039/100000001
UNSPECIFIEDAlexander von Humboldt-Stiftunghttp://dx.doi.org/10.13039/100005156
UNSPECIFIED[ERC] Horizon 2020 Framework Programmehttp://dx.doi.org/10.13039/100010661
UNSPECIFIEDH2020 Marie Skłodowska-Curie Actionshttp://dx.doi.org/10.13039/100010665
UNSPECIFIEDAix-Marseille Universitéhttp://dx.doi.org/10.13039/100007586
UNSPECIFIED[ANR] Agence Nationale de la Recherchehttp://dx.doi.org/10.13039/501100001665
UNSPECIFIEDLabexhttp://dx.doi.org/10.13039/501100004100
UNSPECIFIEDRégion Auvergne-Rhône-Alpeshttp://dx.doi.org/10.13039/501100010115
UNSPECIFIED[CAS] Chinese Academy of Scienceshttp://dx.doi.org/10.13039/501100002367
UNSPECIFIED[RFBR]Russian Foundation for Basic Researchhttp://dx.doi.org/10.13039/501100002261
UNSPECIFIED[RSF] Russian Science Foundationhttp://dx.doi.org/10.13039/501100006769
UNSPECIFIEDYandex LLChttps://yandex.com/
UNSPECIFIEDGeneralitat Valencianahttp://dx.doi.org/10.13039/501100003359
UNSPECIFIEDXunta de Galiciahttp://dx.doi.org/10.13039/501100010801
UNSPECIFIEDGeneralitat de Catalunyahttp://dx.doi.org/10.13039/501100002809
UNSPECIFIEDRoyal Societyhttp://dx.doi.org/10.13039/501100000288
UNSPECIFIEDLeverhulme Trusthttp://dx.doi.org/10.13039/501100000275
Contributors:
ContributionNameContributor ID
Research GroupLHCb Collaboration, UNSPECIFIED

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