Coherent J/psi photoproduction in ultra-peripheral PbPb collisions at 2.76 TeV and prospects at CMS for Run 2

Apr 13, 2016, 2:50 PM
15m
SR4b (DESY Hamburg)

SR4b

DESY Hamburg

Small-x, Diffraction and Vector Mesons WG5 Small-x and Diffraction

Speaker

Daniel Tapia Takaki (The University of Kansas in Lawrence, KS, United States)

Description

The coherent J/psi photoproduction cross section is measured in ultra-peripheral PbPb collisions at 2.76 TeV at the CMS experiment at the LHC. The J/psi mesons are reconstructed via their decay into muon pairs. In this talk, the measurement of the coherent J/psi photoproduction cross section as well as the neutron dependence break-up mode ratios for this process will be presented. These measurements extend the recent ALICE results on coherent J/psi photoproduction to a new rapidity range, confirming the experimental evidence of nuclear gluon effects in gamma+Pb interactions at unprecedentedly low Bjorken-x values in the Pb nucleus. The prospects of photon-induced measurements with heavy ions using the run 2 data at the LHC will be also described.

Primary author

Daniel Tapia Takaki (The University of Kansas in Lawrence, KS, United States)

Presentation materials