Please use this identifier to cite or link to this item:
https://hdl.handle.net/20.500.13091/5736
Title: | Search for exotic decays of the Higgs boson to a pair of pseudoscalars in the μμbb and ττbb final states | Authors: | Hayrapetyan, A. Tumasyan, A. Adam, W. Andrejkovic, J.W. Bergauer, T. Chatterjee, S. Damanakis, K. |
Keywords: | Bosons Charged particles Tellurium compounds Vanadium compounds Branching fractions Confidence levels Data sample Exotic decay Final state Higgs boson Integrated luminosity Proton proton collisions Pseudoscalars Upper limits Scattering parameters |
Publisher: | Springer Nature | Abstract: | A search for exotic decays of the Higgs boson (H) with a mass of 125GeV to a pair of light pseudoscalars a1 is performed in final states where one pseudoscalar decays to two b quarks and the other to a pair of muons or τ leptons. A data sample of proton–proton collisions at s=13TeV corresponding to an integrated luminosity of 138fb-1 recorded with the CMS detector is analyzed. No statistically significant excess is observed over the standard model backgrounds. Upper limits are set at 95% confidence level (CL) on the Higgs boson branching fraction to μμbb and to ττbb, via a pair of a1s. The limits depend on the pseudoscalar mass ma1 and are observed to be in the range (0.17–3.3) ×10-4 and (1.7–7.7) ×10-2 in the μμbb and ττbb final states, respectively. In the framework of models with two Higgs doublets and a complex scalar singlet (2HDM+S), the results of the two final states are combined to determine upper limits on the branching fraction B(H→a1a1→ℓℓbb) at 95% CL, with ℓ being a muon or a τ lepton. For different types of 2HDM+S, upper bounds on the branching fraction B(H→a1a1) are extracted from the combination of the two channels. In most of the Type II 2HDM+S parameter space, B(H→a1a1) values above 0.23 are excluded at 95% CL for ma1 values between 15 and 60GeV. © The Author(s) 2024. | URI: | https://doi.org/10.1140/epjc/s10052-024-12727-4 https://hdl.handle.net/20.500.13091/5736 |
ISSN: | 1434-6044 |
Appears in Collections: | Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collections |
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