125 GeV Higgs boson from t-b-τ Yukawa unification

Abstract

We identify a class of supersymmetric SU (4) c ×SU (2) L ×SU (2) R models in which imposing essentially perfect t-b-τ Yukawa coupling unification at M GUT yields a mass close to 122-126 GeV for the lightest CP-even (SM-like) Higgs boson. The squark and gluino masses in these models exceed 3 TeV, but the stau and charginos in some cases can be considerably lighter. We display some benchmark points corresponding to neutralino-stau and bino-wino coannihilations as well as A-resonance. The wellknown MSSM parameter tan β is around 46-52.

Split sfermion families, Yukawa unification and muon g − 2

“…On the other hand, as we mentioned above, t-b-τ YU requires [9][10][11][12][13][14][15][16][17][18][19] the sleptons to be around a TeV or above, if universality among sfermion masses is assumed at M GUT . Our analysis in the following sections show that the non-universal gaugino case with split family sfermions can resolve the g − 2 discrepancy and also realize t-b-τ Yukawa unification, while staying consistent with all current experimental data.…”

“…For this case, 10% or better t-b-τ Yukawa unification consistent with all constraints (including the Higgs boson mass) requires m 0 1 TeV and m 1/2 1 TeV [18,19]. The colored sparticle spectrum does not change much [12][13][14][15][16][17] if we consider different mass relations among the gauginos at M GUT , but the sleptons can be light. Again it leads to heavy first and second generation squarks which are beyond the reach of LHC 14 [36].…”

“…In this scenario the desired supersymmetric threshold corrections to t-b-τ Yukawa couplings can be realized with Mg mb [12][13][14][15][16][17]. For a particular choice of SSB gaugino masses (M 1 : M 2 : M 3 = 1 : 3 : −2) at M GUT , which can be derived in the framework of SO(10) GUT, it was shown [18,19] that the CP-even SM-like Higgs boson mass m h ≈ 125 GeV can be predicted from t-b-τ YU.…”

“…On the other hand, imposing t-b-τ Yukawa coupling unification condition at M GUT [6][7][8] can place significant constraints on the supersymmetric spectrum in order to fit the top, bottom and tau masses. These constraints are quite severe [9][10][11][12][13][14][15][16][17][18][19], especially after the discovery of a SM like Higgs boson with mass, m h 125 − 126 GeV [20,21].…”

Light staus and enhanced Higgs diphoton rate with non-universal gaugino masses and SO(10) Yukawa unification

“…measurement of the Higgs mass of about 125 GeV gives additional constraints on the SUSY spectrum [44,45]. Implications of the 125 GeV Higgs for SO (10) Yukawa unification were recently reviewed in ref.…”