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Coherent J/šœ“ photoproduction at forward rapidity in ultra-peripheral Pb-Pb collisions at āˆšsNN=5.02 TeV (CROSBI ID 276371)

Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija

(ALICE Collaboration) Acharya, S. ; ... ; Antičić, Tome ; ... ; Erhardt, Filip ; ... ; Gotovac, Sven ; ... ; Jerčić, Marko ; ... et al. Coherent J/šœ“ photoproduction at forward rapidity in ultra-peripheral Pb-Pb collisions at āˆšsNN=5.02 TeV // Physics letters. B, 798 (2019), 134926, 14. doi: 10.1016/j.physletb.2019.134926

Podaci o odgovornosti

Acharya, S. ; ... ; Antičić, Tome ; ... ; Erhardt, Filip ; ... ; Gotovac, Sven ; ... ; Jerčić, Marko ; ... ; Lončar, Petra ; ... ; Mudnić, Eugen ; ... ; Planinić, Mirko ; ... ; Poljak, Nikola ; ... ; Simatović, Goran ; ... ; Utrobičić, Antonija ; ... ; Vicković, Linda ; ... ; Zurlo, N.

ALICE Collaboration

engleski

Coherent J/šœ“ photoproduction at forward rapidity in ultra-peripheral Pb-Pb collisions at āˆšsNN=5.02 TeV

The ALICE collaboration performed the first rapidity-differential measurement of coherent J/Ļˆ photoproduction in ultra-peripheral Pbā€“Pb collisions at a center-of-mass energy āˆšsNN=5.02 TeV. The J/Ļˆ is detected via its dimuon decay in the forward rapidity region ( āˆ’4.0 < y < āˆ’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 Ī¼b āˆ’1 . The cross section for coherent J/Ļˆ production is presented in six rapidity bins. The results are compared with theoretical models for coherent J/Ļˆ photoproduction. These comparisons indicate that gluon shadowing effects play a role in the photoproduction process. The ratio of Ļˆā€² to J/Ļˆ coherent photoproduction cross sections was measured and found to be consistent with that measured for photoproduction off protons.

J/Ļˆ ; photoproduction ; ultra-peripheral ; Pbā€“Pb

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Podaci o izdanju

798

2019.

134926

14

objavljeno

0370-2693

1873-2445

10.1016/j.physletb.2019.134926

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Fizika

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