Higgs boson mass from t-b-τ Yukawa unification

Abstract

We employ the Yukawa coupling unification condition, y t = y b = y τ at M GUT , inspired by supersymmetric SO(10) models, to estimate the lightest Higgs boson mass as well as masses of the associated squarks and gluino. We employ non-universal soft masses, dictated by SO(10) symmetry, for the gauginos. Furthermore, the soft masses for the two scalar Higgs doublets are set equal at M GUT , and in some examples these are equal to the soft masses for scalars in the matter multiplets. For µ > 0, M 2 > 0, where M 2 denotes the SU (2) gaugino mass, essentially perfect t-b-τ Yukawa unification is possible, and it predicts a Higgs mass of 122 -124 GeV with a theoretical uncertainty of about ±3 GeV. The corresponding gluino and the first two family squarks have masses 3 TeV. We present some LHC testable benchmark points which also show the presence of neutralino-stau coannihilation in this scenario. The well-known MSSM parameter tan β ≈ 47.

Split sfermion families, Yukawa unification and muon g − 2

“…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. This result does not change much in terms of the Higgs mass prediction if we relax t-b-τ YU up to 10% [18,19]. 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].…”

“…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.…”

“…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.…”

LHC constraints on Yukawa unification in SO(10)

“…4 3 In ref. [45] Yukawa-unified solutions with gaugino masses given in eq. (2.1) and universal scalar masses were found.…”