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@ARTICLE{Chekhovsky:645859,
      author       = {Chekhovsky, Vladimir and others},
      collaboration = {{CMS Collaboration}},
      title        = {{O}bservation of {C}oherent ϕ(1020) {M}eson
                      {P}hotoproduction in {U}ltraperipheral {P}b{P}b {C}ollisions
                      at s{NN}=5.36 {T}e{V}},
      journal      = {Physical review letters},
      volume       = {135},
      number       = {26},
      issn         = {0031-9007},
      address      = {College Park, Md.},
      publisher    = {APS},
      reportid     = {PUBDB-2026-00658, arXiv:2504.05193. CMS-HIN-24-009.
                      CERN-EP-2025-051},
      pages        = {262301},
      year         = {2025},
      abstract     = {The first observation of coherent ϕ(1020) meson
                      photoproduction off heavy nuclei is presented using
                      ultraperipheral lead-lead collisions at a center-of-mass
                      energy per nucleon pair of 5.36 TeV. The data were collected
                      by the CMS experiment and correspond to an integrated
                      luminosity of 1.62 μb−1. The ϕ(1020) meson signals are
                      reconstructed via the K+K− decay channel. The production
                      cross section is presented as a function of the ϕ(1020)
                      meson rapidity in the range 0.3<|y|<1.0, probing gluons that
                      carry a fraction of the nucleon momentum (x) around 10-4.
                      The observed cross section exhibits little dependence on
                      rapidity and is significantly suppressed, by a factor of
                      ∼5, compared to a baseline model that treats a nucleus as
                      a collection of free nucleons. Theoretical models that
                      incorporate the nuclear shadowing effect generally provide a
                      better description of the ϕ(1020) data than those
                      incorporating gluon saturation. This study establishes a
                      powerful new tool for exploring nuclear effects and nuclear
                      gluonic structure in the small-x regime at a unique energy
                      scale bridging the perturbative and nonperturbative quantum
                      chromodynamics domains.},
      cin          = {CMS},
      ddc          = {530},
      cid          = {I:(DE-H253)CMS-20120731},
      pnm          = {611 - Fundamental Particles and Forces (POF4-611) /
                      HIDSS-0002 - DASHH: Data Science in Hamburg - Helmholtz
                      Graduate School for the Structure of Matter
                      $(2019_IVF-HIDSS-0002)$ / DFG project G:(GEPRIS)390833306 -
                      EXC 2121: Quantum Universe (390833306)},
      pid          = {G:(DE-HGF)POF4-611 / $G:(DE-HGF)2019_IVF-HIDSS-0002$ /
                      G:(GEPRIS)390833306},
      experiment   = {EXP:(DE-H253)LHC-Exp-CMS-20150101},
      typ          = {PUB:(DE-HGF)16},
      eprint       = {2504.05193},
      howpublished = {arXiv:2504.05193},
      archivePrefix = {arXiv},
      SLACcitation = {$\%\%CITATION$ = $arXiv:2504.05193;\%\%$},
      doi          = {10.1103/2ssw-wwyy},
      url          = {https://bib-pubdb1.desy.de/record/645859},
}