The results of a search for the production of two scalar bosons in final states with two photons and two tau leptons are presented. The search considers both nonresonant production of a Higgs boson pair, HH, and resonant production via a new boson X which decays either to HH or to H and a new scalar Y. The analysis uses up to 138 fb(-1) of proton-proton collision data, recorded between 2016 and 2018 by the CMS experiment at the LHC at a center-of-mass energy of 13TeV. No evidence for signal is found in the data. For the nonresonant production, the observed (expected) upper limit at 95% confidence level (CL) on the HH production cross section is set at 930 (740) fb, corresponding to 33 (26) times the standard model prediction. At 95% CL, HH production is observed (expected) to be excluded for values of kappa(lambda) outside the range between -12 (-9.4) and 17 (15). Observed (expected) upper limits at 95% CL for the X -> HH cross section are found to be within 160 to 2200 (200 to 1800) fb, depending on the mass of X. In the X -> Y(tau tau)H(gamma gamma) search, the observed (expected) upper limits on the product of the production cross section and decay branching fractions vary between 0.059-1.2 fb (0.087-0.68 fb). For the X -> Y(gamma gamma)H(tau tau) search the observed (expected) upper limits on the product of the production cross section and Y -> gamma gamma branching fraction vary between 0.69-15 fb (0.73-8.3 fb) in the low Y mass search, tightening constraints on the next-to-minimal supersymmetric standard model, and between 0.64-10 fb (0.70-7.6 fb) in the high Y mass search.

Hayrapetyan, A., Tumasyan, A., Adam, W., Andrejkovic, J.W., Benato, L., Bergauer, T., et al. (2026). Search for the nonresonant and resonant production of a Higgs boson in association with an additional scalar boson in the γγττ final state in proton-proton collisions at √s=13 TeV. JOURNAL OF HIGH ENERGY PHYSICS(5) [10.1007/JHEP05(2026)186].

Search for the nonresonant and resonant production of a Higgs boson in association with an additional scalar boson in the γγττ final state in proton-proton collisions at √s=13 TeV

Ciocci, M. A.;D'Amante, V.;Turini, N.;
2026-01-01

Abstract

The results of a search for the production of two scalar bosons in final states with two photons and two tau leptons are presented. The search considers both nonresonant production of a Higgs boson pair, HH, and resonant production via a new boson X which decays either to HH or to H and a new scalar Y. The analysis uses up to 138 fb(-1) of proton-proton collision data, recorded between 2016 and 2018 by the CMS experiment at the LHC at a center-of-mass energy of 13TeV. No evidence for signal is found in the data. For the nonresonant production, the observed (expected) upper limit at 95% confidence level (CL) on the HH production cross section is set at 930 (740) fb, corresponding to 33 (26) times the standard model prediction. At 95% CL, HH production is observed (expected) to be excluded for values of kappa(lambda) outside the range between -12 (-9.4) and 17 (15). Observed (expected) upper limits at 95% CL for the X -> HH cross section are found to be within 160 to 2200 (200 to 1800) fb, depending on the mass of X. In the X -> Y(tau tau)H(gamma gamma) search, the observed (expected) upper limits on the product of the production cross section and decay branching fractions vary between 0.059-1.2 fb (0.087-0.68 fb). For the X -> Y(gamma gamma)H(tau tau) search the observed (expected) upper limits on the product of the production cross section and Y -> gamma gamma branching fraction vary between 0.69-15 fb (0.73-8.3 fb) in the low Y mass search, tightening constraints on the next-to-minimal supersymmetric standard model, and between 0.64-10 fb (0.70-7.6 fb) in the high Y mass search.
2026
Hayrapetyan, A., Tumasyan, A., Adam, W., Andrejkovic, J.W., Benato, L., Bergauer, T., et al. (2026). Search for the nonresonant and resonant production of a Higgs boson in association with an additional scalar boson in the γγττ final state in proton-proton collisions at √s=13 TeV. JOURNAL OF HIGH ENERGY PHYSICS(5) [10.1007/JHEP05(2026)186].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11365/1324426
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