Observation of a new particle in the search for the Standard Model Higgs bosonwith the ATLAS detector at the LHC

Aad, G, Abajyan, T, Abbott, B, Abdallah, J, Abdel Khalek, S, Abdelalim, A A, Abdinov, O, Asquith, L, Bartsch, V, Cerri, A, De Santo, A, Martin-Haugh, S, Potter, C J, Rose, A, Salvatore, F, Shaw, K, Sutton, M R, Vivarelli, I, Atlas Collaboration, and others, (2012) Observation of a new particle in the search for the Standard Model Higgs bosonwith the ATLAS detector at the LHC. Physics Letters B, 716 (1). pp. 1-29. ISSN 0370-2693

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Abstract

A search for the Standard Model Higgs boson in proton–proton collisions with the ATLAS detector at the LHC is presented. The datasets used correspond to integrated luminosities of approximately 4.8 fb−1 collected at √s = 7 TeV in 2011 and 5.8 fb−1 at √s = 8 TeV in 2012. Individual searches in the channels H→ZZ(∗)→4l, H→γγ and H→WW(∗)→eνμνinthe8TeVdataarecombinedwithpreviously published results of searches for H → Z Z(∗), W W (∗), bb ̄ and τ+τ− in the 7 TeV data and results from improved analyses of the H → Z Z (∗) → 4l and H → γ γ channels in the 7 TeV data. Clear evidence for the production of a neutral boson with a measured mass of 126.0±0.4 (stat)±0.4 (sys) GeV is presented. This observation, which has a significance of 5.9 standard deviations, corresponding to a background fluctuation probability of 1.7×10−9, is compatible with the production and decay of the Standard Model Higgs boson.

Item Type: Article
Schools and Departments: School of Mathematical and Physical Sciences > Physics and Astronomy
Depositing User: Lily Asquith
Date Deposited: 14 Jun 2019 13:50
Last Modified: 01 Jul 2019 12:31
URI: http://sro.sussex.ac.uk/id/eprint/84300

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