Search for a Heavy Pseudoscalar Higgs Boson Decaying into a 125 GeV Higgs Boson and a Z Boson in Final States with Two Tau and Two Light Leptons at √s = 13 TeV

Journal of High Energy Physics 2020
Viesturs Veckalns

A search is performed for a pseudoscalar Higgs boson, A, decaying into a 125 GeV Higgs boson h and a Z boson. The h boson is specifically targeted in its decay into a pair of tau leptons, while the Z boson decays into a pair of electrons or muons. A data sample of proton-proton collisions collected by the CMS experiment at the LHC at s = 13 TeV is used, corresponding to an integrated luminosity of 35.9 fb−1. No excess above the standard model background expectations is observed in data. A model-independent upper limit is set on the product of the gluon fusion production cross section for the A boson and the branching fraction to Zh → ℓℓττ. The observed upper limit at 95% confidence level ranges from 27 to 5 fb for A boson masses from 220 to 400 GeV, respectively. The results are used to constrain the extended Higgs sector parameters for two benchmark scenarios of the minimal supersymmetric standard model. [Figure not available: see fulltext.]

Keywords
Hadron-Hadron scattering (experiments) | Higgs physics
DOI
10.1007/JHEP03(2020)065
Hyperlink
https://link.springer.com/article/10.1007%2FJHEP03%282020%29065

Veckalns, V., CERN international group of authors. Search for a Heavy Pseudoscalar Higgs Boson Decaying into a 125 GeV Higgs Boson and a Z Boson in Final States with Two Tau and Two Light Leptons at √s = 13 TeV. Journal of High Energy Physics, 2020, Vol. 2020, No. 3, Article number 65. ISSN 1126-6708. e-ISSN 1029-8479. Available from: doi:10.1007/JHEP03(2020)065

Publication language
English (en)