Coherent J/ψ photoproduction in ultra-peripheral PbPb collisions at sNN=2.76TeV with the CMS experiment
Yazarlar (1)
Doç. Dr. Mustafa Numan BAKIRCI Tokat Gaziosmanpaşa Üniversitesi, Türkiye
Makale Türü Açık Erişim Özgün Makale (SCOPUS dergilerinde yayınlanan tam makale)
Dergi Adı Physics Letters Section B Nuclear Elementary Particle and High Energy Physics
Dergi ISSN 0370-2693 Wos Dergi Scopus Dergi
Makale Dili İngilizce Basım Tarihi 09-2017
Cilt / Sayı / Sayfa 772 / 1 / 489–511 DOI 10.1016/j.physletb.2017.07.001
Makale Linki https://www.sciencedirect.com/science/article/am/pii/S0370269317305488?via%3Dihub
UAK Araştırma Alanları
Fen Bilimleri ve Matematik
Özet
The cross section for coherent J/ψ photoproduction accompanied by at least one neutron on one side of the interaction point and no neutron activity on the other side, X n 0 n, is measured with the CMS experiment in ultra-peripheral PbPb collisions at s N N= 2.76 TeV. The analysis is based on a data sample corresponding to an integrated luminosity of 159 μb− 1, collected during the 2011 PbPb run. The J/ψ mesons are reconstructed in the dimuon decay channel, while neutrons are detected using zero degree calorimeters. The measured cross section is d σ X n 0 n coh/d y (J/ψ)= 0.36±0.04 (stat)±0.04 (syst) mb in the rapidity interval 1.8<| y|< 2.3. Using a model for the relative rate of coherent photoproduction processes, this X n 0 n measurement gives a total coherent photoproduction cross section of d σ coh/d y (J/ψ)= 1.82±0.22 (stat)±0.20 (syst)±0.19 (theo) mb. The data strongly disfavor the impulse approximation …
Anahtar Kelimeler
CMS | Heavy ion collisions | J/Psi | Physics | Ultra-peripheral collisions | UPC