γγ→ϕiϕjprocesses in the type-III two-Higgs-doublet model

Abstract

We discuss the implications of assuming a four-zero Yukawa texture and a general Higgs potential for the production of neutral Higgs boson pairs at γγ colliders through the γγ → φiφj (φi = h, H, A) reaction within the context of the two Higgs doublet model type III. Exact analytical expressions for the γγ → φiφj reaction are presented. The use of a nonlinear R ξ -gauge, which considerably simplifies the loop calculations and renders compact analytical expressions, is stressed. We show that these processes are very sensitive to a general structure of the Higgs potential that impact the triple and quartic couplings of the scalar sector. We present results for scenarios of the parameters of the model that are still consistent with current experimental constraints. It is found that the cross sections for the γγ → φiφj processes can be up to two orders of magnitude larger than those gotten in 2HDM type I and type II. The possibility of a light CP-scalar is also studied.

Sensitivity of the decayh→ZZ*→Zl+l−to the Higgs self-coupling through radiative corrections

“…Similarly, we will use the full Higgs potential Eq. (20) because the λ 6 and λ 7 parameters will induce important corrections to the self scalar couplings [24,25]. This model is called 2HDM-III, it includes two neutral scalar fields, h and H, and h is the lightest Higgs boson associated to the SM.…”

“…[24,25]. The gauge boson vector couplings were used in the unitary gauge and the respective Yukawa couplings are determined by the four zeros texture version of 2HDM [27].…”

Flavor violating signatures of lighter and heavier Higgs bosons within Two Higgs Doublet Model type III at the LHeC

“…Since a specific four-zero texture is implemented as a flavor symmetry in the Yukawa sector, this is the mechanism which controls FCNCs so that discrete symmetries in the Higgs potential are not needed [8][9][10][11][12]. Then the most general SU (2) L × U (1) Y invariant scalar potential, following [7], can be written where φ f ij (φ = h, H, A), Xij , Yij and Zij are defined as follows:…”

“…[8][9][10][11][12][13][14][15]. However, plentiful of studies, also including lepton flavor violating scenarios, exist, some specific to 2HDMs and others adaptable to their case: see for an incomplete list, e.g., Refs.…”

“…It has also been investigated in the context of a future e + e − [43] and γγ collider [12]. Prospects at a future hadron collider have been investigated in [38].…”