Abstract
Measurements of single Higgs production and its decays are in good agreement with the Standard Model. There is still room for large modifications in double Higgs production at LHC, though these effects may be correlated with large corrections to other observables, in particular single Higgs production. In this work we address the issue of enhancing double Higgs production in the presence of scalar leptoquarks while satisfying all experimental constraints. We show at leading order that including more than one species of leptoquarks, large cubic interactions with the Higgs can lead to sizable enhancement of di-Higgs production cross section at LHC, while at the same time keeping other Higgs observables and precision measurements under control. For masses above 800 GeV these corrections are in general below 30%, whereas in a viable scenario in which one of the leptoquarks can be light, specifically in the mass range 400 − 600 GeV, we show that it is possible to roughly double the SM cross section for di-Higgs production, implying that possible first hints of it may be probed at the high luminosity LHC at mathcal{L} ∼ 2 ab−1.
Highlights
Still remains room for the possibility that some of the Higgs interactions may be affected by new physics
We consider in this work an example of the last situation, how the double Higgs production process at the Large Hadron Collider (LHC) can possibly be enhanced in a model of beyond the SM physics (BSM) that contains scalar leptoquarks (LQ) which interact with the Higgs and SM fermions
We take into account the bounds described in the previous paragraph and, by performing a numerical study which in no way is intended to be thorough, we show that it is possible in our BSM model to obtain cross sections for double Higgs production which can be slightly larger than 2 times the SM one, while at the same time satisfying all experimental constraints
Summary
The discovery of a scalar particle compatible with the Standard Model Higgs boson at the Large Hadron Collider (LHC) has motivated searches for new physics using the Higgs boson as a probe. Since Higgs bosons are colorless particles, their pair production from the collision of two gluons is necessarily mediated through loop contributions which could be permeable to new physics effects. We explore the Higgs production in gluon fusion under the influence of scalar LQs. First, we focus on the dissection of the ultraviolet complete calculation of the double Higgs production cross section, at leading order on αS. We focus on the dissection of the ultraviolet complete calculation of the double Higgs production cross section, at leading order on αS We review it but from the perspective of the Higgs LET framework, comparing both results to check the limit of this approximation. That when considering the phenomenological impact of the double Higgs production cross section in sections 5 and 6 we take ratios against the SM prediction at leading order. We expect that most high order corrections (in particular QCD ones) drop in the ratio
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