Coherent J/ψ photo production at forward rapidity in ultra-peripheral Pb–Pb collisions at sNN = 5.02 TeV
dc.contributor.author | KARASU UYSAL, Ayben | |
dc.contributor.author | ALICE Collaboration | |
dc.date.accessioned | 2020-01-17T08:39:30Z | |
dc.date.available | 2020-01-17T08:39:30Z | |
dc.date.issued | 2019-09-10 | |
dc.identifier.uri | http://hdl.handle.net/20.500.12498/1626 | |
dc.description.abstract | 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. | en_US |
dc.subject | J/ψ Photoproduction | en_US |
dc.subject | LHC | |
dc.subject | ALICE | |
dc.title | Coherent J/ψ photo production at forward rapidity in ultra-peripheral Pb–Pb collisions at sNN = 5.02 TeV | en_US |
dc.type | Makale | en_US |