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
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...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English English |
| Published: |
Springer Verlag
2018
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| Subjects: | |
| Online Access: | http://irep.iium.edu.my/69998/1/69998_Evidence%20for%20associated%20production_article.pdf http://irep.iium.edu.my/69998/2/69998_Evidence%20for%20associated%20production_scopus.pdf http://irep.iium.edu.my/69998/ https://link.springer.com/content/pdf/10.1007%2FJHEP08%282018%29066.pdf |
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| Summary: | 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. |
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