Higgs boson spectra in supersymmetric left-right models

Abstract

We present a comprehensive analysis of the Higgs boson spectra in several versions of the supersymmetric left-right model based on the gauge symmetryA variety of symmetry breaking sectors are studied, with a focus on the constraints placed on model parameters by the lightest neutral CP even Higgs boson mass M h . The breaking of SU (2) R symmetry is achieved by Higgs fields transforming either as triplets or doublets, and the electroweak symmetry breaking is triggered by either bidoublets or doublets. The Higgs potential is analyzed with or without a gauge singlet Higgs field present. Seesaw models of Type I and Type II, inverse seesaw models, universal seesaw models and an E 6 inspired alternate left-right model are included in our analysis. Several of these models lead to the tree-level relation M h ≤ √ 2 m W (rather than M h ≤ m Z that arises in the MSSM), realized when the SU (2) R symmetry breaking scale is of order TeV. With such an enhanced upper limit, it becomes possible to accommodate a Higgs boson of mass 126 GeV with relatively light stops that mix negligibly. In models with Higgs triplets, a doubly charged scalar remains light below a TeV with its mass arising entirely from radiative corrections. We carry out the complete one-loop calculation for its mass induced by the Majorana Yukawa couplings and show the consistency of the framework. We argue that these models prefer a low SU (2) R breaking scale. Other theoretical and phenomenological implications of these models are briefly discussed. *

Resonant slepton production and right sneutrino dark matter in left-right supersymmetry

“…Unlike in non-supersymmetric left-right symmetric extensions of the SM, predictions for the masses of the right-handed gauge bosons exhibit an upper limit, which depends on the SUSY breaking scale [62,63], as the charge-conserving vacuum is not stable when v R M SUSY . However, such a limit does not hold if B−L = 0 triplets stabilize the vacuum and the right-handed gauge sector is extremely heavy, with masses of O(10 11 ) GeV [54][55][56].…”

“…If the slepton masses are much smaller than v R , the correction will be negative and worsen the problem of the negative mass eigenvalue [63]. The large value of v R that we have adopted hence disfavors a light slepton option.…”

Charged Higgs Beyond the MSSM at the LHC

“…If the slepton masses are much smaller than v R , the correction will be negative and worsen the problem of the negative mass eigenvalue [21]. Recently it was found that the gauge and Higgs sectors can also significantly contribute to the doubly charged Higgs mass, which opens up a window for lighter right sleptons and sneutrinos [22].…”

Anatomy of heavy gauge bosons in a left-right supersymmetric model

“…A variety of LRSUSY models have been discussed in literature with different scalar sectors for the symmetry breaking mechanism [7,8]. The one we consider here is the minimal LRSUSY model with automatic R-partiy conservation [9] where the right-handed symmetry is broken by scalar triplets fields as they acquire non-zero vacuum expectation values (VEVs).…”