Title:	First Search for Exclusive Diphoton Production at High Mass with Tagged Protons in Proton-Proton Collisions at √s=13 TeV
Authors:	Tumasyan, A. Georgiev, Vjačeslav Hammerbauer, Jiří Linhart, Richard Peroutka, Zdeněk Urban, Ondřej Zich, Jan CMS, Collaboration TOTEM, Collaboration
Citation:	TUMASYAN, A. GEORGIEV, V. HAMMERBAUER, J. LINHART, R. PEROUTKA, Z. URBAN, O. ZICH, J. CMS, C. TOTEM, C. First Search for Exclusive Diphoton Production at High Mass with Tagged Protons in Proton-Proton Collisions at √s=13 TeV. PHYSICAL REVIEW LETTERS, 2022, roč. 129, č. 1, s. "011801-1" - "011801-20". ISSN: 0031-9007
Issue Date:	2022
Publisher:	American Physical Society
Document type:	článek article
URI:	2-s2.0-85135620132 http://hdl.handle.net/11025/49825
ISSN:	0031-9007
Keywords in different language:	diphoton production;high mass;LHC, particle physics;proton-proton collisions
Abstract in different language:	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. If the other parameter is constrained to its standard model value, the limits at 95% confidence level are |ζ1|<2.9×10−13 GeV−4 and |ζ2|<6.0×10−13 GeV−4.
Rights:	©CERN
Appears in Collections:	Články / Articles (RICE) Články / Articles (KEI) OBD

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