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Search for a light CP-odd Higgs boson decaying into a pair of 𝜏-leptons in proton-proton collisions at βˆšπ‘  = 13 TeV with the ATLAS detector

Aad, G.; Aakvaag, E.; Abbott, B.; Abdelhameed, S.; Abeling, K.; Abicht, N. J.; Abidi, S. H.; Aboelela, M.; Aboulhorma, A.; Abramowicz, H.; Abreu, H.; Abulaiti, Y.; Acharya, B. S.; Ackermann, A.; Adam Bourdarios, C.; Adamczyk, L.; Addepalli, S. V.; Addison, M. J.; Adelman, J.; Adiguzel, A.; Adye, T.; Affolder, A. A.; Afik, Y.; Agaras, M. N.; Aggarwal, A.; Agheorghiesei, C.; Ahmadov, F.; Ahuja, S.; Ai, X.; Aielli, G.; Aikot, A.; Ait Tamlihat, M.; Aitbenchikh, B.; Akbiyik, M.; Γ…kesson, T. P. A.; Akimov, A. V.; Akiyama, D.; Akolkar, N. N.; Aktas, S.; Al Khoury, Konie

Abstract This paper reports a search for a light CP-odd scalar resonance with a mass of 20 GeV to 90 GeV in 13 TeV proton-proton collision data with an integrated luminosity of 140 fbβˆ’1 collected with the ATLAS detector at the Large Hadron Collider. The analysis assumes the resonance is produced via gluon-gluon fusion and decays into a 𝜏⁺𝜏⁻ pair which subsequently decays into a fully leptonic πœ‡βΊπœˆ_πœ‡πœˆΜ„_𝜏 π‘’Β―πœˆΜ„_𝑒 𝜈_𝜏 or 𝑒 + 𝜈_𝑒 πœˆΜ„_𝜏 πœ‡Β― πœˆΜ„_πœ‡ 𝜈_𝜏 final state

No significant excess of events above the predicted Standard Model background is observed. The results are interpreted within a flavour-aligned two-Higgs-doublet model, and a model-independent cross-section interpretation is also given. Upper limits at 95% confidence level between 3.0 pb and 68 pb are set on the cross-section for producing a CP-odd Higgs boson that decays into a 𝜏⁺𝜏⁻ pair.

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Also Published In

Title
Journal of High Energy Physics
DOI
https://doi.org/10.1007/JHEP12(2024)126

More About This Work

Academic Units
Physics
Published Here
January 22, 2025

Notes

Hadron-Hadron Scattering, Higgs Physics

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