Journal article
Evidence for associated production of a Higgs boson with a top quark pair in final states with electrons, muons, and hadronically decaying τ leptons at s√=13 TeV
Journal of high energy physics : JHEP, Vol.2018, 66
08/13/2018
DOI: 10.1007/JHEP08(2018)066
Appears in Diamond Open Access
Abstract
Results of a search for the standard model Higgs boson produced in association with a top quark pair (ttH) in final states with electrons, muons, and hadronically decaying τ leptons are presented. The analyzed data set corresponds to an integrated luminosity of 35.9 fb−1 recorded in proton-proton collisions at √ s = 13 TeV by the CMS experiment in 2016. The sensitivity of the search is improved by using matrix element and machine learning methods to separate the signal from backgrounds. The measured signal rate amounts to 1.23+0.45 −0.43 times the production rate expected in the standard model, with an observed (expected) significance of 3.2σ (2.8σ), which represents evidence for ttH production in those final states. An upper limit on the signal rate of 2.1 times the standard model production rate is set at 95% confidence level.
Details
- Title: Subtitle
- Evidence for associated production of a Higgs boson with a top quark pair in final states with electrons, muons, and hadronically decaying τ leptons at s√=13 TeV
- Creators
- CMS Collaboration
- Contributors
- Y Onel (Contributor) - University of Iowa, Physics and AstronomyJ Nachtman (Contributor) - University of Iowa, Physics and Astronomy
- Resource Type
- Journal article
- Publication Details
- Journal of high energy physics : JHEP, Vol.2018, 66
- DOI
- 10.1007/JHEP08(2018)066
- ISSN
- 1029-8479
- Publisher
- Springer; Ithaca
- Language
- English
- Date published
- 08/13/2018
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984429013002771
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