A search for new physics in central exclusive production using the missing mass technique with the CMS detector and the CMS-TOTEM precision proton spectrometer

The CMS & TOTEM collaborations
Tumasyan, Armen , Adam, Wolfgang , Andrejkovic, Janik Walter , Bergauer, Thomas , Chatterjee, Suman , Damanakis, Konstantinos , Dragicevic, Marko , Escalante Del Valle, Alberto , Hussain, Priya Sajid , Jeitler, Manfred
Eur.Phys.J.C 83 (2023) 827, 2023.

Abstract (data abstract)
A generic search is presented for the associated production of a Z boson or a photon with an additional unspecified massive particle X,${\rm pp}\rightarrow {\rm pp} +{\rm Z}/\gamma+{\rm X}$, in proton-tagged events from proton-proton collisions at $\sqrt{s}=13\TeV$, recorded in 2017 with the CMS detector and the CMS-TOTEM precision proton spectrometer. The missing mass spectrum is analysed in the 600--1600 GeV range and a fit is performed to search for possible deviations from the background expectation. No significant excess in data with respect to the background predictions has been observed. Model-independent upper limits on the visible production cross section of ${\rm pp}\rightarrow {\rm pp} +{\rm Z}/\gamma+{\rm X}$ are set.

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