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https://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: Particles and Fields, 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. |
DOI: | 10.1140/epjc/s10052-016-4034-8 |
Published version: | http://dx.doi.org/10.1140/epjc/s10052-016-4034-8 |
Appears in Collections: | Aurora harvest 3 Physics publications |
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hdl_99937.pdf | Published version | 1.6 MB | Adobe PDF | View/Open |
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