Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/99937
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Type: Journal article
Title: Search for new phenomena in events with at least three photons collected in pp collisions at √s = 8 TeV with the ATLAS detector
Other Titles: Search for new phenomena in events with at least three photons collected in pp collisions at root s = 8 TeV with the ATLAS detector
Author: Aad, G.
Abbott, B.
Abdallah, J.
Abdinov, O.
Aben, R.
Abolins, M.
AbouZeid, O.
Abramowicz, H.
Abreu, H.
Abreu, R.
Abulaiti, Y.
Acharya, B.
Adamczyk, L.
Adams, D.
Adelman, J.
Adomeit, S.
Adye, T.
Affolder, A.
Agatonovic-Jovin, T.
Agricola, J.
et al.
Citation: European Physical Journal C, 2016; 76(4):210-1-210-26
Publisher: Springer-Verlag
Issue Date: 2016
ISSN: 1434-6044
1434-6052
Statement of
Responsibility: 
G. Aad … P. Jackson … L. Lee ... A. Petridis... N. Soni … M. J. White … et al. (ATLAS collaboration)
Abstract: Results of a search for new phenomena in events with at least three photons are reported. Data from proton–proton collisions at a centre-of-mass energy of 8 TeV, corresponding to an integrated luminosity of 20.3 fb−1, were collected with the ATLAS detector at the LHC. The observed data are well described by the Standard Model. Limits at the 95 % confidence level on new phenomena are presented based on the rate of events in an inclusive signal region and a restricted signal region targeting the rare decay Z→3γ, as well as di-photon and tri-photon resonance searches. For a Standard Model Higgs boson decaying to four photons via a pair of intermediate pseudoscalar particles (a), limits are found to be σ× BR (h→aa)× BR (a→γγ)2<10−3σSM for 10 GeV <ma< 62 GeV. Limits are also presented for Higgs boson-like scalars (H) for mH> 125 GeV, and for a Z′ decaying to three photons via Z′→a+γ→3γ. Additionally, the observed limit on the branching ratio of the Z boson decay to three photons is found to be BR(Z→3γ)<2.2×10−6, a result five times stronger than the previous result from LEP.
Keywords: ATLAS Collaboration
Rights: © CERN for the benefit of the ATLAS collaboration 2016. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
RMID: 0030046951
DOI: 10.1140/epjc/s10052-016-4034-8
Appears in Collections:Physics publications

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