A search is presented for non-resonant Higgs boson pair production, targeting the 𝑏𝑏𝑍𝑍, 4𝑉 (𝑉=𝑊or 𝑍),𝑉𝑉𝜏𝜏,4𝜏,𝛾𝛾𝑉𝑉 and 𝛾𝛾𝜏𝜏 decay channels. Events are categorised based on the multiplicity of light charged leptons ( electrons or muons ), hadronically decaying tau leptons, and photons. The search is based on a data sample of proton–proton collisions at √𝑠=13TeV recorded with the ATLAS detector during Run 2 of the Large Hadron Collider, corresponding to an integrated luminosity of 140fb−1. No evidence of the signal is found and the observed (expected) upper limit on the cross-section for non-resonant Higgs boson pair production is determined to be 17 (11) times the Standard Model predicted cross-section at 95% confidence level under the background-only hypothesis. The observed (expected) constraints on the 𝐻𝐻𝐻 coupling modifier, 𝜅𝜆, are determined to be−6.2 < 𝜅𝜆 < 11.6 (−4.5 < 𝜅𝜆 < 9.6) at 95% confidence level, assuming the Standard Model for the expected limits and that new physics would only affect 𝜅𝜆.

Search for non-resonant Higgs boson pair production in final states with leptons, taus, and photons in 𝒑 𝒑 collisions at √ 𝒔 = 13TeV with the ATLAS detector / Null, N., 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., et al.. - In: JOURNAL OF HIGH ENERGY PHYSICS. - ISSN 1029-8479. - 2024:8(2024), pp. 1-60. [10.1007/jhep08(2024)164]

Search for non-resonant Higgs boson pair production in final states with leptons, taus, and photons in 𝒑 𝒑 collisions at √ 𝒔 = 13TeV with the ATLAS detector

Betti, A.;Bini, C.;Carnesale, M.;Fiacco, D.;Giagu, S.;Gustavino, G.;Ippolito, V.;Lacava, F.;Martinelli, L.;Morodei, F.;Padovano, G.;Pompa Pacchi, E.;Russo, G.;Santi, L.;
2024

Abstract

A search is presented for non-resonant Higgs boson pair production, targeting the 𝑏𝑏𝑍𝑍, 4𝑉 (𝑉=𝑊or 𝑍),𝑉𝑉𝜏𝜏,4𝜏,𝛾𝛾𝑉𝑉 and 𝛾𝛾𝜏𝜏 decay channels. Events are categorised based on the multiplicity of light charged leptons ( electrons or muons ), hadronically decaying tau leptons, and photons. The search is based on a data sample of proton–proton collisions at √𝑠=13TeV recorded with the ATLAS detector during Run 2 of the Large Hadron Collider, corresponding to an integrated luminosity of 140fb−1. No evidence of the signal is found and the observed (expected) upper limit on the cross-section for non-resonant Higgs boson pair production is determined to be 17 (11) times the Standard Model predicted cross-section at 95% confidence level under the background-only hypothesis. The observed (expected) constraints on the 𝐻𝐻𝐻 coupling modifier, 𝜅𝜆, are determined to be−6.2 < 𝜅𝜆 < 11.6 (−4.5 < 𝜅𝜆 < 9.6) at 95% confidence level, assuming the Standard Model for the expected limits and that new physics would only affect 𝜅𝜆.
2024
high energy physics; DiHiggs search; Higgs potential; Higgs self-interaction
01 Pubblicazione su rivista::01a Articolo in rivista
Search for non-resonant Higgs boson pair production in final states with leptons, taus, and photons in �� �� collisions at √ �� = 13TeV with the ATLAS detector / Null, N., 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., et al.. - In: JOURNAL OF HIGH ENERGY PHYSICS. - ISSN 1029-8479. - 2024:8(2024), pp. 1-60. [10.1007/jhep08(2024)164]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1727063
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