Coherent J/ψ photoproduction at forward rapidity in ultra-peripheral Pb–Pb collisions at sNN=5.02 TeV

ALICE Collaboration

Результат исследований: Научные публикации в периодических изданияхстатья

9 Цитирования (Scopus)

Аннотация

The ALICE collaboration performed the first rapidity-differential measurement of coherent J/ψ photoproduction in ultra-peripheral Pb–Pb collisions at a center-of-mass energy sNN=5.02 TeV. The J/ψ is detected via its dimuon decay in the forward rapidity region (−4.0<y<−2.5) for events where the hadronic activity is required to be minimal. The analysis is based on an event sample corresponding to an integrated luminosity of about 750 μb−1. The cross section for coherent J/ψ production is presented in six rapidity bins. The results are compared with theoretical models for coherent J/ψ photoproduction. These comparisons indicate that gluon shadowing effects play a role in the photoproduction process. The ratio of ψ to J/ψ coherent photoproduction cross sections was measured and found to be consistent with that measured for photoproduction off protons.

Язык оригиналаанглийский
Номер статьи134926
ЖурналPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Том798
DOI
СостояниеОпубликовано - 10 ноя 2019

Предметные области Scopus

  • Ядерная физика и физика высоких энергий

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