Search for Resonant Production of High-Mass Photon Pairs in Proton-Proton Collisions at √s=8 and 13 TeV
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Search for Resonant Production.pdf
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Author(s)
Abercrombie, Daniel Robert
Allen, Brandon Leigh
Apyan, Aram
Barbieri, Richard Alexander
Baty, Austin Alan
Bi, Ran
Bierwagen, Katharina
Brandt, Stephanie Akemi
Busza, Wit
Cali, Ivan Amos
Date Issued
July 2016
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Khachatryan, V. et al. “Search for Resonant Production of High-Mass Photon Pairs in Proton-Proton Collisions at √S = 8 and 13 TeV.” Physical Review Letters 117.5 (2016): n. pag. © 2016 American Physical Society
Version
Final published version
Abstract
A search for the resonant production of high-mass photon pairs is presented. The analysis is based on samples of proton-proton collision data collected by the CMS experiment at center-of-mass energies of 8
and 13 TeV, corresponding to integrated luminosities of 19.7 and 3.3 fb[superscript −1], respectively. The interpretation of the search results focuses on spin-0 and spin-2 resonances with masses between 0.5 and 4 TeV and with widths, relative to the mass, between 1.4 × 10[superscript −4] and 5.6 × 10[superscript −2]. Limits are set on scalar resonances produced through gluon-gluon fusion, and on Randall-Sundrum gravitons. A modest excess of events compatible with a narrow resonance with a mass of about 750 GeV is observed. The local significance of the excess is approximately 3.4 standard deviations. The significance is reduced to 1.6 standard deviations once the effect of searching under multiple signal hypotheses is considered. More data are required to determine the origin of this excess.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
Terms of Use
Creative Commons Attribution 3.0 Unported licence
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1103/PhysRevLett.117.051802
