First search for exclusive diphoton production at high mass with tagged protons in proton-proton collisions at √s =13  TeV

0566248 - FZÚ 2023 RIV US eng J - Journal Article
Tumasyan, A. - Adam, W. - Bergauer, T. - Kašpar, Jan - Kundrát, Vojtěch - Lokajíček, Miloš V. - Procházka, Jiří … Total 2401 authors
First search for exclusive diphoton production at high mass with tagged protons in proton-proton collisions at √s =13  TeV.
Physical Review Letters. Roč. 129, č. 1 (2022), č. článku 011801. ISSN 0031-9007. E-ISSN 1079-7114
Institutional support: RVO:68378271
Keywords : CMS * TOTEM * CERN * exclusive diphoton production in proton-proton scattering
OECD category: Particles and field physics
Impact factor: 8.6, year: 2022
Method of publishing: Open access

A search for exclusive two-photon production via photon exchange in proton-proton collisions, pp → pγγp with intact protons, is presented. The data correspond to an integrated luminosity of 9.4 fb-1 collected in 2016 using the CMS and TOTEM detectors at a center-of-mass energy of 13 TeV at the LHC. Events are selected with a diphoton invariant mass above 350 GeV and with both protons intact in the final state, to reduce backgrounds from strong interactions. The events of interest are those where the invariant mass and rapidity calculated from the momentum losses of the forward-moving protons match the mass and rapidity of the central, two-photon system. No events are found that satisfy this condition. Interpreting this result in an effective dimension-8 extension of the standard model, the first limits are set on the two anomalous four-photon coupling parameters.
Permanent Link: https://hdl.handle.net/11104/0337635