Higgs boson decays toγand invisible particles in the standard model

Abstract

Using the Higgs boson mass m h ¼ 125 GeV, the radiative Higgs decays h → γν lνl with ν l ¼ ν e , ν μ , and ν τ are analyzed in the standard model. Our calculation shows that the inclusive width of these processes, i.e., the sum of Γðh → γν lνl Þ for ν l ¼ ν e , ν μ , ν τ , is 1.41 keV, which is about 15% of Γðh → γγÞ. Therefore, the observation of these channels in future precise experiments may provide some useful information on the Higgs physics in both the standard model and its possible extensions.

One-loop contributions to the decay $H\rightarrow ν_l\barν_lγ$ in standard model revisited

“…H→γν l νl = 0.471109(5) KeV, Γ tot H→γν l νl is for the case of taking all Feynman diagrams. It gives a perfect agreement with the result in [11]. Γ Trig H→γν l νl is noted for the contributions of all triangle diagrams.…”

“…In Ref. [11], one-loop formulas for H → ν l νl γ within SM framework have provided. In view of the importance of the decay channels we revisit the calculation for the decay processes with extending the previous computation and updating numerical predictions Email address: phanhongkhiem@duytan.edu.vn (Khiem Hong Phan) using the present values of input parameters.…”

Higgs boson decay into a lepton pair and a photon revisited

“…In addition to H → Zγ, there is an ongoing effort to search for a decay channel to a photon and a pair of light charged leptons in the region of low lepton-pair invariant mass [3].These experimental pursuits align with recent theoretical analyses of the process H → ℓ + ℓ − γ given in several articles [4][5][6][7][8][9][10], building upon earlier studies [11][12][13][14][15]. Furthermore, the analogous decay of the Higgs boson, involving a photon and a neutrino pair in the final state has received relatively less attention [16][17][18]. The observable signature of this process is a single photon accompanied by missing energy.…”

Search for Higgs andZBoson Decays toJ/ψγandϒ(nAad1, Abbott2, Abdallah3 et al. 2015Phys. Rev. Lett.835980View full textAdd to dashboardCite

“…The VBF signal model is appropriately scaled to account for the production of a Higgs boson in association with a W or Z boson or in association with a tt pair, correcting for the relative production rates and experimental acceptances for these channels. Contributions from nonresonant H → ðZ Ã =γ Ã Þγ → μ þ μ − γ decays are expected to be negligible with respect to the present sensitivity [33][34][35].…”