Search for new phenomena in events with at least three photons collected in pp collisions at √s = 8 TeV with the ATLAS detector
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 [superscript −1], were collected with the ATLAS detector at the LHC. The observed dat...
| Egile nagusia: | |
|---|---|
| Beste egile batzuk: | |
| Formatua: | Artikulua |
| Hizkuntza: | en_US |
| Argitaratua: |
Springer-Verlag
2017
|
| Sarrera elektronikoa: | http://hdl.handle.net/1721.1/106565 https://orcid.org/0000-0002-7586-7253 |
| _version_ | 1826200601666519040 |
|---|---|
| author | Taylor, Frank E |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Taylor, Frank E |
| author_sort | Taylor, Frank E |
| collection | MIT |
| description | 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 [superscript −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)[superscript 2]<10[superscript −3]σ[subscript SM] for 10 GeV <m[subscript a]< 62 GeV. Limits are also presented for Higgs boson-like scalars (H) for m[subscript H]>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[superscript −6], a result five times stronger than the previous result from LEP. |
| first_indexed | 2024-09-23T11:38:59Z |
| format | Article |
| id | mit-1721.1/106565 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T11:38:59Z |
| publishDate | 2017 |
| publisher | Springer-Verlag |
| record_format | dspace |
| spelling | mit-1721.1/1065652022-10-01T05:02:30Z Search for new phenomena in events with at least three photons collected in pp collisions at √s = 8 TeV with the ATLAS detector Taylor, Frank E Massachusetts Institute of Technology. Department of Physics Taylor, Frank E 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 [superscript −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)[superscript 2]<10[superscript −3]σ[subscript SM] for 10 GeV <m[subscript a]< 62 GeV. Limits are also presented for Higgs boson-like scalars (H) for m[subscript H]>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[superscript −6], a result five times stronger than the previous result from LEP. United States. Dept. of Energy National Science Foundation (U.S.) Brookhaven National Laboratory 2017-01-20T19:18:40Z 2017-01-20T19:18:40Z 2016-04 2015-09 Article http://purl.org/eprint/type/JournalArticle 1434-6044 1434-6052 http://hdl.handle.net/1721.1/106565 ATLAS Collaboration et al. “Search for New Phenomena in Events with at Least Three Photons Collected in Pp Collisions at √s = 8 TeV with the ATLAS Detector.” The European Physical Journal C 76.4 (2016): n. pag. © 2016 CERN for the benefit of the ATLAS collaboration https://orcid.org/0000-0002-7586-7253 en_US http://dx.doi.org/10.1140/epjc/s10052-016-4034-8 The European Physical Journal C Creative Commons Attribution 4.0 International License http://creativecommons.org/licenses/by/4.0/ application/pdf Springer-Verlag Springer |
| spellingShingle | Taylor, Frank E Search for new phenomena in events with at least three photons collected in pp collisions at √s = 8 TeV with the ATLAS detector |
| title | Search for new phenomena in events with at least three photons collected in pp collisions at √s = 8 TeV with the ATLAS detector |
| title_full | Search for new phenomena in events with at least three photons collected in pp collisions at √s = 8 TeV with the ATLAS detector |
| title_fullStr | Search for new phenomena in events with at least three photons collected in pp collisions at √s = 8 TeV with the ATLAS detector |
| title_full_unstemmed | Search for new phenomena in events with at least three photons collected in pp collisions at √s = 8 TeV with the ATLAS detector |
| title_short | Search for new phenomena in events with at least three photons collected in pp collisions at √s = 8 TeV with the ATLAS detector |
| title_sort | search for new phenomena in events with at least three photons collected in pp collisions at √s 8 tev with the atlas detector |
| url | http://hdl.handle.net/1721.1/106565 https://orcid.org/0000-0002-7586-7253 |
| work_keys_str_mv | AT taylorfranke searchfornewphenomenaineventswithatleastthreephotonscollectedinppcollisionsats8tevwiththeatlasdetector |