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Measurement of exclusive processes from CMS

A. Bylinkin, on behalf of the CMS collaboration

in XXV International Workshop on Deep-Inelastic Scattering and Related Subjects

Contribution: pdf


Exclusive vector meson photoproduction is studied in ultra-peripheral pPb collisions at $\sqrt{s_{NN}} = 5.02$ TeV. The cross sections are measured as a function of the photon-proton centre-of-mass energy, extending the energy range explored by H1 and ZEUS Experiments at HERA. In addition, the differential cross sections ($d\sigma/d|t|$), where $|t|\approx p^{2}_{T}$ is the squared transverse momentum of produced vector mesons, are measured and the slope parameters are obtained. The results are compared to previous measurements and to theoretical predictions.

We also report a measurement of the exclusive or quasi-exclusive $W^{+}W^{-}$ production in pp collisions at $\sqrt{s} = 8$ TeV ($7$ TeV) using data corresponding to an integrated luminosity of $19.7$ fb$^{-1}$ ($5.5$fb$^{-1}$), respectively. In this study, we look for any deviations that there might be from the Standard Model, and the results are used to set limits on the Anomalous Quartic Gauge Couplings.

Finally, the latest performance plots of combined CMS-TOTEM data are presented and prospects for further measurements are discussed.