Search for tt⎯⎯H production in the H→bb⎯⎯⎯ decay channel with leptonic tt⎯⎯ decays in proton-proton collisions at √𝑠=13 TeV
View/ Open
Issue Date
2019-03-05Author
Sirunyan, A. M.
Sanders, Stephen J.
The CMS collaboration
Publisher
Springer Verlag
Type
Article
Article Version
Scholarly/refereed, publisher version
Rights
Copyright CERN, for the benefit of the CMS Collaboration.
Metadata
Show full item recordAbstract
A search is presented for the associated production of a standard model Higgs boson with a top quark-antiquark pair (tt⎯⎯H), in which the Higgs boson decays into a b quark-antiquark pair, in proton-proton collisions at a centre-of-mass energy √𝑠=13 TeV. The data correspond to an integrated luminosity of 35.9 fb−1 recorded with the CMS detector at the CERN LHC. Candidate tt⎯⎯H events are selected that contain either one or two electrons or muons from the tt⎯⎯ decays and are categorised according to the number of jets. Multivariate techniques are employed to further classify the events and eventually discriminate between signal and background. The results are characterised by an observed tt⎯⎯H signal strength relative to the standard model cross section, μ = σ/σSM, under the assumption of a Higgs boson mass of 125 GeV. A combined fit of multivariate discriminant distributions in all categories results in an observed (expected) upper limit on μ of 1.5 (0.9) at 95% confidence level, and a best fit value of 0.72 ± 0.24(stat) ± 0.38(syst), corresponding to an observed (expected) signal significance of 1.6 (2.2) standard deviations above the background-only hypothesis.
Description
This work is licensed under a Creative Commons Attribution 4.0 International License.
Collections
Citation
The CMS collaboration., Sirunyan, A.M., Tumasyan, A. et al. Search for tt⎯⎯H production in the H→bb⎯⎯⎯ decay channel with leptonic tt⎯⎯ decays in proton-proton collisions at √𝑠=13 TeV. J. High Energ. Phys. 2019, 26 (2019). https://doi.org/10.1007/JHEP03(2019)026
Items in KU ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.
We want to hear from you! Please share your stories about how Open Access to this item benefits YOU.