Search for Higgs and Z boson decays to J/ψγ and ϒ(nS)γ with the ATLAS detector

Allbrooke, B M M, Asquith, L, Cerri, A, Chavez Barajas, C A, De Santo, A, Potter, C T, Salvatore, F, Santoyo Castillo, I, Suruliz, K, Sutton, M R, Vivarelli, I and others (ATLAS collaboration), (2015) Search for Higgs and Z boson decays to J/ψγ and ϒ(nS)γ with the ATLAS detector. Physical Review Letters, 114. pp. 121801-1. ISSN 0031-9007

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A search for the decays of the Higgs and Z bosons to J/ψγ and ϒ(nS)γ (n = 1, 2, 3) is performed with pp collision data samples corresponding to integrated luminosities of up to 20.3 fb −1 collected at √s = 8 TeV with the ATLAS detector at the CERN Large Hadron Collider. No significant excess of events is observed above expected backgrounds and 95% C.L. upper limits are placed on the branching fractions. In the J/ψγ final state the limits are 1.5 × 10 −3 and 2.6 × 10 −6 for the Higgs and Z boson decays, respectively, while in the ϒ(1S, 2S, 3S) γ final states the limits are (1.3, 1.9,, 1.3) x 10 -3 and (3.4, 6.5, 5.4) x 10 -6 respectively.

Item Type: Article
Keywords: PACS numbers: 14.80.Bn, 13.38.Dg, 14.70.Hp, 14.80.Ec
Schools and Departments: School of Mathematical and Physical Sciences > Physics and Astronomy
Subjects: Q Science > QC Physics
Depositing User: Richard Chambers
Date Deposited: 21 Jul 2015 05:50
Last Modified: 24 Mar 2017 15:06

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