Conveners
Parallel session 34: Physics of ultraperipheral collisions II
- Daniel Tapia Takaki (University of Kansas)
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Yu-Chen (Janice) Chen (Massachusetts Institute of Technology)09/04/2025, 11:10Physics of ultraperipheral collisionsOral
In this talk, we present the first measurement of $\mathrm{D}^0$ photoproduction in heavy ion ultraperipheral collisions (UPCs) using the data collected by CMS experiment during 2023 PbPb collisions at LHC. The measured production cross sections are presented as a function of the $\mathrm{D}^0$ transverse momentum (2$< p_{T} <$12 GeV/c) and rapidity (-2< y <2). Additionally, we will present...
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Xiao Huang (Rice University (US))09/04/2025, 11:30Physics of ultraperipheral collisionsOral
The study of $\rm{J}/\psi$ photoproduction in ultraperipheral collisions (UPCs) offers a powerful probe of gluon dynamics in heavy nuclei. In UPCs, photons can interact with the nucleus coherently (involving the entire nucleus) or incoherently (with individual constituents). While coherent processes provide insight into the average gluon density, incoherent photoproduction is uniquely...
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Kaiyang Wang (University of Science and Technology of China)09/04/2025, 11:50Physics of ultraperipheral collisionsOral
In relativistic heavy-ion collisions, $J/\psi$ photoproduction serves as a sensitive probe for studying the gluonic structure in heavy nuclei. Differential measurements of photon-induced $J/\psi$ production provide important constraints on gluon distribution functions and sub-nucleonic shape fluctuations. The linear polarization of photons involved in these processes enables imaging of the...
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Krista Lizbeth Smith (Pusan National University (ROK))09/04/2025, 12:10Physics of ultraperipheral collisionsOral
Measurements of quarkonia production in peripheral and ultraperipheral
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heavy-ion collisions are sensitive to photon-photon and photon-nucleus interactions, the partonic structure of nuclei, and to the mechanisms of vector-meson production. LHCb has studied production of the J/ψ and ψ(2s) charmonium states in peripheral and ultra-peripheral collisions using PbPb data at forward rapidity,... -
Dr Hendrik Roch (Wayne State University)09/04/2025, 12:30Physics of ultraperipheral collisionsOral
Diffractive vector meson production is a golden channel in the search for gluon saturation. The color glass condensate (CGC) framework has been successfully applied to describe diffractive vector meson production in $e+p$ collisions at HERA. Predictions for $\gamma+Pb$ collisions realized in ultraperipheral collisions at the LHC are however overestimating the experimental data at large center...
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