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Search for decays of the Higgs boson into a pair of pseudoscalar particles decaying into b(b)over-barτ+τ- using pp collisions at √s=13 TeV with the ATLAS detector
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Search for decays of the Higgs boson into a pair of pseudoscalar particles decaying into b(b)over-barτ+τ- using pp collisions at √s=13 TeV with the ATLAS detector

G. Aad, E. Aakvaag, B. Abbott, S. Abdelhameed, K. Abeling, N. J. Abicht, S. H. Abidi, M. Aboelela, A. Aboulhorma, H. Abramowicz, …
Physical review. D, 卷.110(5), 052013
30/09/2024
DOI: https://doi.org/10.1103/PhysRevD.110.052013
Web of Science ID: WOS:001381779300002

摘要

Astronomy & Astrophysics Physical Sciences Physics Physics, Particles & Fields Science & Technology
This paper presents a search for exotic decays of the Higgs boson into a pair of new pseudoscalar particles, H -> aa, where one pseudoscalar decays into a b-quark pair and the other decays into a tau-lepton pair, in the mass range 12 <= m(a) <= 60 GeV. The analysis uses pp collision data at root s = 13 TeV collected with the ATLAS detector at the LHC, corresponding to an integrated luminosity of 140 fb(-1). No significant excess above the Standard Model ( SM) prediction is observed. Assuming the SM Higgs boson production cross section, the search sets upper limits at 95% confidence level on the branching ratio of Higgs bosons decaying into b (b) over bar tau(+)tau(-), B(H -> aa -> b (b) over bar tau(+)tau(-)), between 2.2% and 3.9% depending on the pseudoscalar mass.

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