Asearch is presented for rare decays of the Z and Higgs bosons to a photon and a J ∕ ψ or a ψ(2S) meson, with the charmonium state subsequentially decaying to a pair of muons. The data set corresponds to an integrated luminosity of 123fb−1 of proton-proton collisions at a center-of-mass energy of 13Te V collected with the CMS detector at the LHC. No evidence for branching fractions of these rare decay channels larger than predicted in the standard model is observed. Upper limits at 95% confidence level are set: B(H →J ∕ ψγ) <2.6×10−4, B(H → ψ(2S)γ) < 9.9×10−4, B(Z → J ∕ ψγ) <0.6×10−6, and B(Z →ψ(2S)γ) <1.3×10−6. The ratio of the Higgs boson coupling modifiers 𝜅c ∕𝜅γ is constrained to be in the interval (−157, +199) at 95% confidence level. Assuming 𝜅γ =1, this interval becomes (−166, +208).

Hayrapetyan, A., Tumasyan, A., Adam, W., Andrejkovic, J.W., Bergauer, T., Chatterjee, S., et al. (2025). Search for rare decays of the Z and Higgs bosons to a J ∕ ψ or ψ(2S) meson and a photon in proton-proton collisions at √ 𝑠 =13 Te V. PHYSICS LETTERS. SECTION B, 865, 1-28 [10.1016/j.physletb.2025.139462].

Search for rare decays of the Z and Higgs bosons to a J ∕ ψ or ψ(2S) meson and a photon in proton-proton collisions at √ 𝑠 =13 Te V

Battilana, C.;Bonacorsi, D.;Cuffiani, M.;Diotalevi, T.;Fanfani, A.;Giommi, L.;Guiducci, L.;Lorusso, M.;Paggi, G.;Rossi Tisbeni, S.;Rovelli, T.;Siroli, G. P.;
2025

Abstract

Asearch is presented for rare decays of the Z and Higgs bosons to a photon and a J ∕ ψ or a ψ(2S) meson, with the charmonium state subsequentially decaying to a pair of muons. The data set corresponds to an integrated luminosity of 123fb−1 of proton-proton collisions at a center-of-mass energy of 13Te V collected with the CMS detector at the LHC. No evidence for branching fractions of these rare decay channels larger than predicted in the standard model is observed. Upper limits at 95% confidence level are set: B(H →J ∕ ψγ) <2.6×10−4, B(H → ψ(2S)γ) < 9.9×10−4, B(Z → J ∕ ψγ) <0.6×10−6, and B(Z →ψ(2S)γ) <1.3×10−6. The ratio of the Higgs boson coupling modifiers 𝜅c ∕𝜅γ is constrained to be in the interval (−157, +199) at 95% confidence level. Assuming 𝜅γ =1, this interval becomes (−166, +208).
2025
Hayrapetyan, A., Tumasyan, A., Adam, W., Andrejkovic, J.W., Bergauer, T., Chatterjee, S., et al. (2025). Search for rare decays of the Z and Higgs bosons to a J ∕ ψ or ψ(2S) meson and a photon in proton-proton collisions at √ �� =13 Te V. PHYSICS LETTERS. SECTION B, 865, 1-28 [10.1016/j.physletb.2025.139462].
Hayrapetyan, A.; Tumasyan, A.; Adam, W.; Andrejkovic, J. W.; Bergauer, T.; Chatterjee, S.; Damanakis, K.; Dragicevic, M.; Hussain, P. S.; Jeitler, M.;...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/1043809
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