Associated production ofH±andW∓in high-energy

Abstract

We study the associated production of the charged Higgs boson and W ± gauge boson in high energy e + e − collisions in the Minimal Supersymmetric Standard Model (MSSM). This associated production, which first arises at the one loop level, offers the possibility of producing the charged Higgs boson at the e + e − collider with mass more than half the center-of-mass energy, when the charged Higgs pair production is kinematically forbidden. We present analytic and numerical results for the cross section for e + e − → W + H − in the full MSSM, taking into account the previously uncalculated contributions from supersymmetric (SUSY) particles. We find that the contributions of the SUSY particles enhance the cross section over most of SUSY parameter space, especially when the SUSY particles are light, ∼ 200 GeV. With favorable SUSY parameters, at small tan β, this process can yield more than ten W ± H ∓ events for m H ± < ∼ 350 GeV in 500 fb −1 at a 500 GeV e + e − collider, or m H ± < ∼ 600 GeV in 1000 fb −1 at a 1000 GeV collider. 80% left-handed polarization of the e − beam improves these reaches to m H ± < ∼ 375 GeV and m H ± < ∼ 670 GeV, respectively.

Charged Higgs Boson production at $$e^+e^-$$ e + e - colliders in the complex MSSM: a full one-loop analysis

“…[71] would not give more agreement/understanding as already achieved with Ref. [68]. Consequently, we omitted a comparison with Ref.…”

“…[68] the loop induced process e + e − → H ± W ∓ has been computed in the rMSSM. We used their input parameters as far as possible and are roughly in agree- • Ref.…”

“…[67] and Ref. [68], respectively. The effect of Sudakov logarithms on channel (1) were analyzed in Ref.…”

On MSSM charged Higgs-boson production in association with an electroweak W boson at electron–positron colliders

“…√ s < 2m H ± ), the only way to extend the search for the charged Higgs boson to higher masses is to try to observe its single production in association with lighter particles. The most relevant processes which have been studied in the literature are the tree-level processes e + e − → H ± τ ν [4,5] and e + e − → H ± tb [6,5], and the loop-induced processes e + e − → H ± eν [7,8,5] and e + e − → W ± H ∓ [9,10,11,12,13,5]. Most of the studies are done in the framework of a Two Higgs Doublet Model (THDM) with parameters fixed at MSSM values, except for Refs.…”

“…[11,12] which study W ± H ∓ production in the general THDM, Refs. [9,13] which study the same process in the full MSSM, and Ref. [8] which includes virtual sfermion contributions for the cross section prediction of the H ± eν e final state.…”