Search for a heavy pseudoscalar Higgs boson decaying to a 125 GeV Higgs boson and a Z boson in final states with two tau and two light leptons in proton-proton collisions at √s = 13 TeV
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Author(s)
Chekhovsky, V.
Hayrapetyan, A.
Makarenko, V.
Tumasyan, A.
Adam, W.
Andrejkovic, J. W.
Benato, L.
Bergauer, T.
Chatterjee, S.
Damanakis, K.
Date Issued
October 9, 2025
Journal
Journal of High Energy Physics
Publisher
Springer Berlin Heidelberg
Citation
The CMS collaboration., Chekhovsky, V., Hayrapetyan, A. et al. Search for a heavy pseudoscalar Higgs boson decaying to a 125 GeV Higgs boson and a Z boson in final states with two tau and two light leptons in proton-proton collisions at √s = 13 TeV. Energ. Phys. 2025, 74 (2025).
Version
Final published version
Abstract
A search for a heavy pseudoscalar Higgs boson, A, decaying to a 125 GeV Higgs
boson h and a Z boson is presented. The h boson is identified via its decay to a pair of tau
leptons, while the Z boson is identified via its decay to a pair of electrons or muons. The
search targets the production of the A boson via the gluon-gluon fusion process, gg → A,
and in association with bottom quarks, bb¯A. The analysis uses a data sample corresponding
to an integrated luminosity of 138 fb−1
collected with the CMS detector at the CERN LHC
in proton-proton collisions at a centre-of-mass energy of √
s = 13 TeV. Constraints are set on
the product of the cross sections of the A production mechanisms and the A → Zh decay
branching fraction. The observed (expected) upper limit at 95% confidence level ranges
from 0.049 (0.060) pb to 1.02 (0.79) pb for the gg → A process and from 0.053 (0.059) pb
to 0.79 (0.61) pb for the bb¯A process in the probed range of the A boson mass, mA, from
225 GeV to 1 TeV. The results of the search are used to constrain parameters within the
M
125
h,EFT benchmark scenario of the minimal supersymmetric extension of the standard model.
Values of tan β below 2.2 are excluded in this scenario at 95% confidence level for all mA
values in the range from 225 to 350 GeV.
MIT Department
Massachusetts Institute of Technology. Laboratory for Nuclear Science
Massachusetts Institute of Technology. Department of Brain and Cognitive Sciences
Massachusetts Institute of Technology. Department of Physics
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DOI of Published Version
https://doi.org/10.1007/JHEP10(2025)074
