Observation of forward neutron multiplicity dependence of dimuon acoplanarity in ultraperipheral Pb-Pb collisions at √sNN = 5.02 TeV
dc.contributor.author | Sirunyan, A. M. | |
dc.contributor.author | Işıldak, Bora | |
dc.date.accessioned | 2023-05-08T06:42:43Z | |
dc.date.available | 2023-05-08T06:42:43Z | |
dc.date.issued | 2021-09-17 | |
dc.identifier.issn | 0031-9007 | en_US |
dc.identifier.uri | http://hdl.handle.net/10679/8201 | |
dc.identifier.uri | https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.127.122001 | |
dc.description.abstract | 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=5.02 TeV, 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[removed]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. | en_US |
dc.description.sponsorship | BMBWF and FWF (Austria); FNRS and FWO (Belgium); CNPq, CAPES, FAPERJ, FAPERGS, and FAPESP (Brazil); MES (Bulgaria); CERN; CAS, MoST, and NSFC (China); COLCIENCIAS (Colombia); MSES and CSF (Croatia); RIF (Cyprus); SENESCYT (Ecuador); MoER, ERC PUT, and ERDF (Estonia); Academy of Finland, MEC, and HIP (Finland); CEA and CNRS/IN2P3 (France); BMBF, DFG, and HGF (Germany); GSRT (Greece); NKFIA (Hungary); DAE and DST (India); IPM (Iran); SFI (Ireland); INFN (Italy); MSIP and NRF (Republic of Korea); MES (Latvia); LAS (Lithuania); MOE and UM (Malaysia); BUAP, CINVESTAV, CONACYT, LNS, SEP, and UASLP-FAI (Mexico); MOS (Montenegro); MBIE (New Zealand); PAEC (Pakistan); MSHE and NSC (Poland); FCT (Portugal); JINR (Dubna); MON, RosAtom, RAS, RFBR, and NRC KI (Russia); MESTD (Serbia); SEIDI, CPAN, PCTI, and FEDER (Spain); MOSTR (Sri Lanka); Swiss Funding Agencies (Switzerland); MST (Taipei); ThEPCenter, IPST, STAR, and NSTDA (Thailand); TUBITAK and TAEK (Turkey); NASU (Ukraine); STFC (United Kingdom); DOE and NSF (U.S.). | |
dc.language.iso | eng | en_US |
dc.publisher | American Physical Society | en_US |
dc.relation.ispartof | Physical Review Letters | |
dc.rights | openAccess | |
dc.rights.uri | https://creativecommons.org/licenses/by/4.0/ | |
dc.title | Observation of forward neutron multiplicity dependence of dimuon acoplanarity in ultraperipheral Pb-Pb collisions at √sNN = 5.02 TeV | en_US |
dc.type | Article | en_US |
dc.description.version | Publisher version | en_US |
dc.peerreviewed | yes | en_US |
dc.publicationstatus | Published | en_US |
dc.contributor.department | Özyeğin University | |
dc.contributor.authorID | (ORCID 0000-0002-0283-5234 & YÖK ID 124605) Işıldak, Bora | |
dc.contributor.ozuauthor | Işıldak, Bora | |
dc.creator | The CMS Collaboration | |
dc.identifier.volume | 127 | en_US |
dc.identifier.issue | 12 | en_US |
dc.identifier.wos | WOS:000704665100006 | |
dc.identifier.doi | 10.1103/PhysRevLett.127.122001 | en_US |
dc.identifier.scopus | SCOPUS:2-s2.0-85115323201 | |
dc.relation.publicationcategory | Article - International Refereed Journal - Institutional Academic Staff |
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