Search for exclusive Higgs and Z boson decays to φγ and ργ with the ATLAS detector

The ATLAS Collaboration, , Abraham, N L, Allbrooke, B M M, Asquith, Lily, Cerri, A, Chavez Barajas, C A, De Santo, A, Jones, S D, Lerner, G, Miano, F, Salvatore, F, Santoyo Castillo, I, Shehu, C Y, Shaw, K, Stevenson, T, Suruliz, K, Sutton, M R, Tresoldi, F, Vivarelli, I, Winkels, E, Winston, O J and others, (2018) Search for exclusive Higgs and Z boson decays to φγ and ργ with the ATLAS detector. Journal of High Energy Physics, 7 (127). pp. 1-36. ISSN 1126-6708

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Abstract

A search for the exclusive decays of the Higgs and Z bosons to a φ or ρ meson and a photon is performed with a pp collision data sample corresponding to an integrated luminosity of up to 35.6 fb −1 collected at s √ =13 TeV with the ATLAS detector at the CERN Large Hadron Collider. These decays have been suggested as a probe of the Higgs boson couplings to light quarks. No significant excess of events is observed above the background, as expected from the Standard Model. Upper limits at 95% confidence level were obtained on the branching fractions of the Higgs boson decays to φγ and ργ of 4.8×10 −4 and 8.8×10 −4, respectively. The corresponding 95% confidence level upper limits for the Z boson decays are 0.9×10 −6 and 25×10 −6 for φγ and ργ, respectively.

Item Type: Article
Schools and Departments: School of Mathematical and Physical Sciences > Physics and Astronomy
Research Centres and Groups: Experimental Particle Physics Research Group
Subjects: Q Science > QC Physics
Depositing User: Alice Jackson
Date Deposited: 08 Nov 2018 12:25
Last Modified: 08 Nov 2018 12:27
URI: http://sro.sussex.ac.uk/id/eprint/80065

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