Bottom-tau unification in a supersymmetric SU(5) grand unified theory and constraints from<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mrow><mml:mover><mml:mrow><mml:mi>b</mml:mi></mml:mrow><mml:mrow><mml:mo>→</mml:mo></mml:mrow></mml:mover></mml:mrow></mml:mrow><mml:mi>s</mml:mi><mml:mi>γ</mml:mi></mml:math>and muon<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>g</mml:mi><mml:mi>−</mml:mi><mml:mn>2</mml:mn></mml:math>

Komine, Shinji; Yamaguchi, Masahiro

doi:10.1103/physrevd.65.075013

Cited by 36 publications

(21 citation statements)

References 63 publications

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“…These enhancements are codified via the epsilon terms defined in Eq. (13). There is ambiguity in the sign of some of the terms among the various groups.…”

Section: Discussionmentioning

confidence: 99%

“…In the supersymmetric framework the unification of the Yukawa couplings of the third generation, as predicted in several grand unification models, is rather sensitive to the parameters of the supersymmetry (SUSY) models. Thus, the compatibility of bunification at the grand unification scale with the observed b and masses depends sensitively on the sign of 4 (where is the Higgs mixing parameter) as well as on the details of the sparticle spectrum [12,13]. Moreover, for most of the available parameter-space b-unification is in conflict with other experimental constraints such as the FCNC process b !…”

Section: Introductionmentioning

confidence: 99%

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WMAP dark matter constraints and Yukawa unification in supergravity models withCPphases

et al. 2005

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The compatibility of producing the observed amount of dark matter, as indicated by the Wilkinson Microwave Anisotropy Probe (WMAP) data, through the relic abundance of neutralinos with Yukawa unification and with the measured rate of b ! s is analyzed in mSUGRA and extended SUGRA unified models with the inclusion of CP phases. The CP phases affect the analysis in several ways, e.g., through the threshold corrections to the b-quark mass, via their effects on the neutralino relic density and through the supersymmetry (SUSY) contribution to the BRb ! s which is sensitive to the CP phases. We present some specific models with large SUSY phases, which can accommodate the fermion electric dipole moment constraints and give a neutralino relic density in agreement with observations as well as with the b-unification constraint. The possibility of achieving WMAP relic density constraints with full Yukawa unification is also explored.

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“…These enhancements are codified via the epsilon terms defined in Eq. (13). There is ambiguity in the sign of some of the terms among the various groups.…”

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

WMAP dark matter constraints and Yukawa unification in supergravity models withCPphases

et al. 2005

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“…However, applying this scheme in the framework of the Constrained Minimal Supersymmetric (SUSY) Standard Model (CMSSM) [4] and given the top and tau experimental masses, the µ parameter is restricted to negative values [5,6]. This is due to the fact that the tree level b-quark mass receives sizeable SUSY corrections [7], which can drive the corrected b-quark mass within its experimental range only for µ < 0.…”

Section: Introductionmentioning

confidence: 99%

“…(2.7), we conclude that b − τ YU can become viable only for M 3 µ < 0 (in accordance with the findings of Refs. [5,6,25,26]). …”

Section: B − τ Unificationmentioning

confidence: 99%

“…In the minimal SU (5) SUSY GUT [24,6], the third generation left handed superfields L = (ν τ , τ ), b c belong to the5 representation (reps), while Q = (t, b), t c , τ c belong to the 10 reps. Assuming that the electroweak Higgs superfields H 1 , H 2 are contained in5 H and 5 H reps, respectively, the model predicts b − τ YU at GUT scale, M GUT (M GUT is determined by the requirement of gauge coupling unification):…”

Section: B − τ Unificationmentioning

confidence: 99%

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b–τ unification with gaugino and sfermion mass non-universality

Pallis

2004

Nuclear Physics B

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In the context of a SUSY GUT inspired MSSM version, the low energy consequences of the asymptotic b − τ Yukawa coupling Unification are examined, under the assumption of universal or non-universal boundary conditions for the gaugino and sfermion masses. Gaugino non-universality is applied, so that the SUSY corrections to b-quark mass can be reconciled with the present experimental data on muon anomalous magnetic moment. Restrictions on the parameter space, originating from the cold dark matter abundance in the universe, the inclusive branching ratio of b → sγ and the accelerator data are, also, investigated and the scalar neutralino-proton cross section is calculated. In the case of a bino-like LSP and universal boundary conditions for the sfermion masses, the constraints, arising from the cold dark matter and BR(b → sγ) can be simultaneously satisfied, mainly thanks to the A-pole effect or the neutralino-stau coannihilations. In addition, sfermion mass non-universality provides the possibility of new coannihilation phenomena (neutralino-sbottom or neutralino-tau sneutrino-stau), which facilitate the simultaneous satisfaction of all the other requirements. In both cases above, the neutralino abundance can essentially decrease for a W-ino or higgsino like LSP creating regions of parameter space with additional neutralino-chargino and/or heavier neutralino coannihilations. The neutralino-sbottom mass proximity significantly ameliorates the detectability of LSP.

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b − τ Yukawa unification in SUSY SU(5) with mirage mediation: LHC and dark matter implications

Raza

Shafi

Ün

2019

J. High Energ. Phys.

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We consider a class of b − τ Yukawa unified Supersymmetric (SUSY) SU (5) GUTs, in which the asymptotic gaugino M 1,2,3 masses are generated through a combination of gravity and mirage mediated supersymmetry breaking. Due to the contributions from mirage mediation, M 3 is always lighter than M 1 and M 2 , and consequently for the range of asymptotic masses considered, the gluino mass mg at low scale is bounded from above at about 4 TeV. We realize two different regions, one in which the MSSM µ−term is less than about 3 TeV. This region yields a stop mass up to 5 TeV, and the stop mass is nearly degenerate with the LSP neutralino for mass around 0.8 to 1.7 TeV. A stau mass can be realized up to about 5 TeV, and the stau mass is approximately degenerate with the LSP neutralino for mass around 2 to 3 TeV. In addition, an A-funnel solution with m A ≈ 2mχ0 1 and mχ0 1 ∼ 700−900 GeV is realized. These three cases yield LSP dark matter abundance in accordance with observations. A second region, on the other hand, arises for mg 1.1mχ01 . The µ−term is rather large ( 20 TeV), and the LSP neutralino is a bino-wino mixture. The gluino mass (∼ 0.8 − 1.2 TeV) is nearly degenerate with the LSP neutralino mass and hence, the gluino-neutralino coannihilation processes play a role in reducing the relic abundance of LSP neutralino down to ranges allowed by the current WMAP measurements. The two regions above can be distinguished through the direct detection experiments. The first region with relatively low µ values yields Higgsino-like DM, whose scattering on the nucleus typically has a large cross-section. We find that such solutions are still allowed by the current results from the LUX experiment, and they will be severely tested by the LUX-Zeplin (LZ) experiment. The second region contains bino-wino DM whose scattering cross-section is relatively low. These solutions are harder to rule out in the foreseeable future.

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Bottom-tau unification in a supersymmetric SU(5) grand unified theory and constraints fromb→sγand muong−2

Cited by 36 publications

References 63 publications

WMAP dark matter constraints and Yukawa unification in supergravity models withCPphases

WMAP dark matter constraints and Yukawa unification in supergravity models withCPphases

b–τ unification with gaugino and sfermion mass non-universality

b − τ Yukawa unification in SUSY SU(5) with mirage mediation: LHC and dark matter implications

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