| Full text | |
| Author(s): |
Alves, Alexandre
;
Ghosh, Tathagata
;
Queiroz, Farinaldo S.
Total Authors: 3
|
| Document type: | Journal article |
| Source: | PHYSICAL REVIEW D; v. 100, n. 3, p. 12-pg., 2019-08-26. |
| Abstract | |
If the Higgs boson decays to a pair of invisible particles, the number of di-Higgs events, where each Higgs decays into Standard Model (SM) particles, is reduced by a factor of two-third taking into account the current LHC bound on invisible decay width of the Higgs boson. We investigate the sensitivity of the upcoming high luminosity run of the LHC to di-Higgs production and subsequent decay to dark matter in the context of the singlet scalar extension of the SM augmented by a fermionic dark matter in the dark and bright channel gamma gamma + (sic)(T). Once systematic uncertainties on background yields are considered, this dark and bright channel presents competitive limits than b (b) over bar + (sic)(T) after a careful tuning of the kinematical cuts that raise the signal over background ratio. We further show that in a multivariate analysis, for an invisible branching fraction as low as similar to 10%, we obtain stronger bounds for the Higgs trilinear coupling from the gamma gamma + (sic)(T) channel compared to the birfy final state. Finally, we demonstrate that the four channels gamma gamma + (sic)(T), b (b) over bar + (sic)(T), b (b) over bar gamma gamma, and b (b) over barb (b) over bar complement each other in the search for di-Higgs production with non-SM trilinear couplings when an invisible decay mode is present. (AU) | |
| FAPESP's process: | 16/01343-7 - ICTP South American Institute for Fundamental Research: a regional center for theoretical physics |
| Grantee: | Nathan Jacob Berkovits |
| Support Opportunities: | Special Projects |