Search for New Phenomena in Monophoton Final States in Proton–proton Collisions at √s = 8 TeV

Search for New Phenomena in Monophoton Final States in Proton–proton Collisions at √s = 8 TeV

Results are presented from a search for new physics in final states containing a photon and missing transverse momentum. The data correspond to an integrated luminosity of 19.6 fb ⁻¹ collected in proton–proton collisions at √s = 8 TeV with the CMS experiment at the LHC. No deviation from the standar...

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Bibliographic Details
Main Authors: CMS Collaboration, Apyan, Aram, Barbieri, Richard Alexander, Bauer, Gerry P, Busza, Wit, Cali, Ivan Amos, Di Matteo, Leonardo, Gomez-Ceballos, Guillelmo, Goncharov, Maxim, Gulhan, Doga Can, Klute, Markus, Lai, Yue Shi, Lee, Yen-Jie, Levin, Amy Elizabeth, Luckey Jr, P David, Ma, Teng, Paus, Christoph M. E., Ralph, Duncan Kelley, Roland, Christof E, Roland, Gunther M, Stephans, George S. F., Stoeckli, Fabian, Sumorok, Konstanty C, Velicanu, Dragos Alexandru, Veverka, Jan, Wyslouch, Boleslaw, Yang, Ming, Zanetti, Marco, Wyslouch, Victoria, Chan, M.
Other Authors: Massachusetts Institute of Technology. Department of Physics
Format: Article
Published: Elsevier 2018
Online Access:http://hdl.handle.net/1721.1/116633
https://orcid.org/0000-0002-9418-6656
https://orcid.org/0000-0002-7945-005X
https://orcid.org/0000-0002-3831-9071
https://orcid.org/0000-0002-2822-3375
https://orcid.org/0000-0001-9236-6621
https://orcid.org/0000-0002-0869-5631
https://orcid.org/0000-0003-1486-606X
https://orcid.org/0000-0003-2593-7767
https://orcid.org/0000-0002-6047-4211
https://orcid.org/0000-0001-8983-2169
https://orcid.org/0000-0003-3106-4894
https://orcid.org/0000-0002-1260-777X
https://orcid.org/0000-0003-3681-0649
https://orcid.org/0000-0002-2850-9007
Description
Summary:Results are presented from a search for new physics in final states containing a photon and missing transverse momentum. The data correspond to an integrated luminosity of 19.6 fb ⁻¹ collected in proton–proton collisions at √s = 8 TeV with the CMS experiment at the LHC. No deviation from the standard model predictions is observed for these final states. New, improved limits are set on dark matter production and on parameters of models with large extra dimensions. In particular, the first limits from the LHC on branon production are found and significantly extend previous limits from LEP and the Tevatron. An upper limit of 14.0 fb on the cross section is set at the 95% confidence level for events with a monophoton final state with photon transverse momentum greater than 145 GeV and missing transverse momentum greater than 140 GeV.

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