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Probing Small Bjorken-x Nuclear Gluonic Structure via Coherent J=ψ Photoproduction in Ultraperipheral Pb-Pb Collisions at √sNN = 5.02 TeV

ArticleAçık Erişim

Özet

Quasireal photons exchanged in relativistic heavy ion interactions are powerful probes of the gluonic structure of nuclei. The coherent J=ψ photoproduction cross section in ultraperipheral lead-lead collisions is measured as a function of photon-nucleus center-of-mass energies per nucleon (WPb γN) over a wide range of 40 < WPb γN < 400 GeV. Results are obtained using data at the nucleon-nucleon center-of-mass energy of 5.02 TeV collected by the CMS experiment at the CERN LHC, corresponding to an integrated luminosity of 1.52 nb−1. The cross section is observed to rise rapidly at low WPb γN, and plateau above WPb γN ≈ 40 GeV, up to 400 GeV, entering a new regime of small Bjorken-x (≈6 × 10−5) gluons being probed in a heavy nucleus. The observed energy dependence is not predicted by current quantum chromodynamic models. © 2023 CERN, for the CMS Collaboration.

Anahtar Kelimeler

Binary alloysGermanium alloysHeavy ionsIon exchangeLead alloysTellurium compoundsCenter-of-mass energiesCentre-of-mass energiesHeaviest nucleiHeavy ion interactionsIntegrated luminosityLead collisionsNucleon-nucleonPb-Pb collisionsPhotoproductionsRelativistic heavy ionsarticlecontrolled studydiagnosisPhotons
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AlanDeğerDil
dc.contributor.authorTumasyan, A.
dc.contributor.authorAdam, W.
dc.contributor.authorAndrejkovic, J.W.
dc.contributor.authorBergauer, T.
dc.contributor.authorChatterjee, S.
dc.contributor.authorDamanakis, K.
dc.contributor.authorDragicevic, M.
dc.contributor.authorEscalante Del Valle, A.
dc.contributor.authorHussain, P.S.
dc.contributor.authorJeitler, M.
dc.contributor.authorKrammer, N.
dc.contributor.authorLechner, L.
dc.contributor.authorLiko, D.
dc.contributor.authorMikulec, I.
dc.contributor.authorSchieck, J.
dc.contributor.authorSchöfbeck, R.
dc.contributor.authorSchwarz, D.
dc.contributor.authorSonawane, M.
dc.contributor.authorTempl, S.
dc.contributor.authorWaltenberger, W.
dc.contributor.authorWulz, C.-E.
dc.contributor.authorDarwish, M.R.
dc.contributor.authorJanssen, T.
dc.contributor.authorKello, T.
dc.contributor.authorVan Mechelen, P.
dc.contributor.authorBols, E.S.
dc.contributor.authorD’Hondt, J.
dc.contributor.authorDe Moor, A.
dc.contributor.authorDelcourt, M.
dc.contributor.authorEl Faham, H.
dc.contributor.authorLowette, S.
dc.contributor.authorMorton, A.
dc.contributor.authorMüller, D.
dc.contributor.authorSahasransu, A.R.
dc.contributor.authorTavernier, S.
dc.contributor.authorVan Doninck, W.
dc.contributor.authorVan Putte, S.
dc.contributor.authorVannerom, D.
dc.contributor.authorClerbaux, B.
dc.contributor.authorDansana, S.
dc.contributor.authorDe Lentdecker, G.
dc.contributor.authorFavart, L.
dc.contributor.authorHohov, D.
dc.contributor.authorJaramillo, J.
dc.contributor.authorLee, K.
dc.contributor.authorMahdavikhorrami, M.
dc.contributor.authorMakarenko, I.
dc.contributor.authorMalara, A.
dc.contributor.authorParedes, S.
dc.contributor.authorPétré, L.
dc.date.accessioned2026-10-18T20:26:51.170176015Z
dc.date.available2026-10-18T20:26:51.170176015Z
dc.date.issued2023
dc.description.abstractQuasireal photons exchanged in relativistic heavy ion interactions are powerful probes of the gluonic structure of nuclei. The coherent J=ψ photoproduction cross section in ultraperipheral lead-lead collisions is measured as a function of photon-nucleus center-of-mass energies per nucleon (WPb γN) over a wide range of 40 < WPb γN < 400 GeV. Results are obtained using data at the nucleon-nucleon center-of-mass energy of 5.02 TeV collected by the CMS experiment at the CERN LHC, corresponding to an integrated luminosity of 1.52 nb−1. The cross section is observed to rise rapidly at low WPb γN, and plateau above WPb γN ≈ 40 GeV, up to 400 GeV, entering a new regime of small Bjorken-x (≈6 × 10−5) gluons being probed in a heavy nucleus. The observed energy dependence is not predicted by current quantum chromodynamic models. © 2023 CERN, for the CMS Collaboration.
dc.description.sponsorshipFunding text 1: We congratulate our colleagues in the CERN accelerator departments for the excellent performance of the LHC and thank the technical and administrative staffs at CERN and at other CMS institutes for their contributions to the success of the CMS effort. In addition, we gratefully acknowledge the computing centers and personnel of the Worldwide LHC Computing Grid and other centers for delivering so effectively the computing infrastructure essential to our analyses. Finally, we acknowledge the enduring support for the construction and operation of the LHC, the CMS detector, and the supporting computing infrastructure provided by the following funding agencies: BMBWF and FWF (Austria); FNRS and FWO (Belgium); CNPq, CAPES, FAPERJ, FAPERGS, and FAPESP (Brazil); MES and BNSF (Bulgaria); CERN; CAS, MoST, and NSFC (China); Colombian Funding Agency (MINICIENCIAS) (Colombia); Croatian Ministry of Science, Education and Sport and Croatian Science Foundation (Croatia); RIF (Cyprus); SENESCYT (Ecuador); Ministry of Education and Research, Estonian Research Council via PRG780, PRG803, and PRG445 and European Regional Development Fund (Estonia); Academy of Finland, Finnish Ministry of Education and Culture, and Helsinki Institute of Physics (Finland); CEA and CNRS/IN2P3 (France); BMBF, DFG, and HGF (Germany); General Secretariat for Research and Innovation (Greece); NKFIH (Hungary); DAE and DST (India); IPM (Iran); SFI (Ireland); INFN (Italy); MSIP and NRF (Republic of Korea); Ministry of Education and Science (Latvia); Lithuanian Academy of Sciences (Lithuania); MOE and UM (Malaysia); BUAP, CINVESTAV, CONACYT, LNS, SEP, and UASLP-FAI (Mexico); Ministry of Science (Montenegro); MBIE (New Zealand); PAEC (Pakistan); MES and NSC (Poland); FCT (Portugal); Ministry of Education, Science and Technological Development of Serbia (Serbia); MCIN/AEI and Plan de Ciencia, Tecnolog\u00EDa e Innovaci\u00F3n del Principado de Asturias (Spain); MOSTR (Sri Lanka); Swiss Funding Agencies (Switzerland); Ministry of Science and Technology (Taipei); MHESI and NSTDA (Thailand); TUBITAK and TENMAK (Turkey); NASU (Ukraine); STFC (United Kingdom); DOE and NSF (USA). Individuals were supported by the National Science Center (Poland), Grants No.\u00A02015/19/N/ST2/02697 and No.\u00A02018/28/T/ST2/00199. We congratulate our colleagues in the CERN accelerator departments for the excellent performance of the LHC and thank the technical and administrative staffs at CERN and at other CMS institutes for their contributions to the success of the CMS effort. In addition, we gratefully acknowledge the computing centers and personnel of the Worldwide LHC Computing Grid and other centers for delivering so effectively the computing infrastructure essential to our analyses. Finally, we acknowledge the enduring support for the construction and operation of the LHC, the CMS detector, and the supporting computing infrastructure provided by the following funding agencies: BMBWF and FWF (Austria); FNRS and FWO (Belgium); CNPq, CAPES, FAPERJ, FAPERGS, and FAPESP (Brazil); MES and BNSF (Bulgaria); CERN; CAS, MoST, and NSFC (China); Colombian Funding Agency (MINICIENCIAS) (Colombia); Croatian Ministry of Science, Education and Sport and Croatian Science Foundation (Croatia); RIF (Cyprus); SENESCYT (Ecuador); Ministry of Education and Research, Estonian Research Council via PRG780, PRG803, and PRG445 and European Regional Development Fund (Estonia); Academy of Finland, Finnish Ministry of Education and Culture, and Helsinki Institute of Physics (Finland); CEA and CNRS/IN2P3 (France); BMBF, DFG, and HGF (Germany); General Secretariat for Research and Innovation (Greece); NKFIH (Hungary); DAE and DST (India); IPM (Iran); SFI (Ireland); INFN (Italy); MSIP and NRF (Republic of Korea); Ministry of Education and Science (Latvia); Lithuanian Academy of Sciences (Lithuania); MOE and UM (Malaysia); BUAP, CINVESTAV, CONACYT, LNS, SEP, and UASLP-FAI (Mexico); Ministry of Science (Montenegro); MBIE (New Zealand); PAEC (Pakistan); MES and NSC (Poland); FCT (Portugal); Ministry of Education, Science and Technological Development of Serbia (Serbia); MCIN/AEI and Plan de Ciencia, Tecnolog\u00EDa e Innovaci\u00F3n del Principado de Asturias (Spain); MOSTR (Sri Lanka); Swiss Funding Agencies (Switzerland); Ministry of Science and Technology (Taipei); MHESI and NSTDA (Thailand); TUBITAK and TENMAK (Turkey); NASU (Ukraine); STFC (United Kingdom); DOE and NSF (USA). Individuals were supported by the National Science Center (Poland), Grants No.\u00A02015/19/N/ST2/02697 and No.\u00A02018/28/T/ST2/00199.; Funding text 2: We congratulate our colleagues in the CERN accelerator departments for the excellent performance of the LHC and thank the technical and administrative staffs at CERN and at other CMS institutes for their contributions to the success of the CMS effort. In addition, we gratefully acknowledge the computing centers and personnel of the Worldwide LHC Computing Grid and other centers for delivering so effectively the computing infrastructure essential to our analyses. Finally, we acknowledge the enduring support for the construction and operation of the LHC, the CMS detector, and the supporting computing infrastructure provided by the following funding agencies: BMBWF and FWF (Austria); FNRS and FWO (Belgium); CNPq, CAPES, FAPERJ, FAPERGS, and FAPESP (Brazil); MES and BNSF (Bulgaria); CERN; CAS, MoST, and NSFC (China); Colombian Funding Agency (MINICIENCIAS) (Colombia); Croatian Ministry of Science, Education and Sport and Croatian Science Foundation (Croatia); RIF (Cyprus); SENESCYT (Ecuador); Ministry of Education and Research, Estonian Research Council via PRG780, PRG803, and PRG445 and European Regional Development Fund (Estonia); Academy of Finland, Finnish Ministry of Education and Culture, and Helsinki Institute of Physics (Finland); CEA and CNRS/IN2P3 (France); BMBF, DFG, and HGF (Germany); General Secretariat for Research and Innovation (Greece); NKFIH (Hungary); DAE and DST (India); IPM (Iran); SFI (Ireland); INFN (Italy); MSIP and NRF (Republic of Korea); Ministry of Education and Science (Latvia); Lithuanian Academy of Sciences (Lithuania); MOE and UM (Malaysia); BUAP, CINVESTAV, CONACYT, LNS, SEP, and UASLP-FAI (Mexico); Ministry of Science (Montenegro); MBIE (New Zealand); PAEC (Pakistan); MES and NSC (Poland); FCT (Portugal); Ministry of Education, Science and Technological Development of Serbia (Serbia); MCIN/AEI and Plan de Ciencia, Tecnolog\u00EDa e Innovaci\u00F3n del Principado de Asturias (Spain); MOSTR (Sri Lanka); Swiss Funding Agencies (Switzerland); Ministry of Science and Technology (Taipei); MHESI and NSTDA (Thailand); TUBITAK and TENMAK (Turkey); NASU (Ukraine); STFC (United Kingdom); DOE and NSF (USA). Individuals were supported by the National Science Center (Poland), Grants No. 2015/19/N/ST2/02697 and No. 2018/28/T/ST2/00199.
dc.identifier.doi10.1103/physrevlett.131.262301
dc.identifier.issn0031-9007
dc.identifier.issue26
dc.identifier.pmid38215362
dc.identifier.scopus2-s2.0-85182298097
dc.identifier.startpage262301
dc.identifier.urihttps://rdlopen.rawdatalibrary.net/r/ebyu/11859
dc.identifier.volume131
dc.language.isoen
dc.publisherAmerican Physical Society
dc.relation.ispartofPhysical Review Letters
dc.rightsinfo:eu-repo/semantics/openAccess
dc.subjectBinary alloys
dc.subjectGermanium alloys
dc.subjectHeavy ions
dc.subjectIon exchange
dc.subjectLead alloys
dc.subjectTellurium compounds
dc.subjectCenter-of-mass energies
dc.subjectCentre-of-mass energies
dc.subjectHeaviest nuclei
dc.subjectHeavy ion interactions
dc.subjectIntegrated luminosity
dc.subjectLead collisions
dc.subjectNucleon-nucleon
dc.subjectPb-Pb collisions
dc.subjectPhotoproductions
dc.subjectRelativistic heavy ions
dc.subjectarticle
dc.subjectcontrolled study
dc.subjectdiagnosis
dc.subjectPhotons
dc.titleProbing Small Bjorken-x Nuclear Gluonic Structure via Coherent J=ψ Photoproduction in Ultraperipheral Pb-Pb Collisions at √sNN = 5.02 TeV
dc.typeArticle
dspace.entity.typePublication
rdl.citation.scopus64
rdl.oa.statusgold
rdl.source.indexSCOPUS