Sfermion flavor and proton decay in high-scale supersymmetry

Shirai, Satoshi

doi:10.1007/jhep03(2014)049

Cited by 44 publications

(41 citation statements)

References 104 publications

(152 reference statements)

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“…With the SUSY breaking scale larger than O(10) TeV, the observed Higgs mass can be realized [9][10][11][12][13][14]. The high-scale SUSY scenario may offer an even more precise gauge coupling unification [15] and open up possibilities for the simplest framework of the grand unified theory [16,17]. With the R-parity conservation assumed, it also provides the lightest SUSY particle (LSP) as a DM candidate.…”

Section: Introductionmentioning

confidence: 99%

Higgsino dark matter in high-scale supersymmetry

Nagata

Shirai

2015

J. High Energ. Phys.

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We study a supersymmetric (SUSY) Standard Model in which a Higgsino is light enough to be dark matter, while the other SUSY particles are much heavier than the weak scale. We carefully treat the effects of heavy SUSY particles to the Higgsino nature, especially taking into account the renormalization effects due to the large hierarchy between the Higgsino and the SUSY breaking scales. Inelastic scattering of the Higgsino dark matter with a nucleus is studied, and the constraints on the scattering by the direct detection experiments are discussed. This gives an upper limit on the new physics scale. Bounds on the dark matter-nucleon elastic scattering, the electric dipole moments, and direct production of Higgsinos, on the other hand, give a lower limit. We show the current status on the limits and discuss the future prospects.

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Section: Introductionmentioning

confidence: 99%

Higgsino dark matter in high-scale supersymmetry

Nagata

Shirai

2015

J. High Energ. Phys.

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“…(40) are integrated out via charged wino and higgsino exchange processes, giving the four-fermion interactions leading to proton decay. The large flavor violation in the right-handed down-squark sector does not significantly induce the other modes, such as p → π 0 µ + [78].…”

Section: Proton Decaymentioning

confidence: 94%

Revisiting flavor and CP violation in supersymmetric SU(5) with right-handed neutrinos

Evans¹,

Kadota

Kuwahara

2018

Phys. Rev. D

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We revisit the minimal supersymmetric SU (5) grand unified theory with three right-handed neutrinos in which universality conditions for soft-supersymmetry breaking parameters are imposed at an input scale above the unification scale. If the Majorana masses for the neutrinos are around 10 15 GeV, large mixing angles and phases in the neutrino sector lead to flavor-violation and CP -violation in the righthanded down squark and left-handed slepton sectors. Since the observed Higgs boson mass and the proton decay constraints indicate sfermions have masses larger than a few TeV, flavor and CP constraints are less restrictive. We explore the constraints on models with a universal soft-supersymmetry breaking input parameters coming from proton stability, electric dipole moments, µ → eγ decays, and the Higgs mass observed at the LHC. Regions compatible with all constraints can be found if non-zero A-terms are taken. arXiv:1807.08234v2 [hep-ph] 12 Nov 2018The collider experiments at the Large Hadron Collider (LHC) have given stringent constraints on models beyond the Standard Model (SM). In the minimal supersymmetric (SUSY) extension of the SM (MSSM), squarks and gluinos are severely constrained by their absence at the LHC (see ) and by the observed Higgs mass [4].In many models, the soft-supersymmetry breaking parameters are assumed to be universal and real at the input scale. This assumption makes it easy to avoid constraints from flavor-changing and CP -violating processes (such as meson oscillations, rare decays, electric dipole moments (EDMs), etc). For most studies, the universality conditions on the soft-supersymmetry breaking parameters are imposed at the grand unification (GUT) scale, M GUT ∼ 2 × 10 16 GeV, where the SM gauge couplings unify. In particular, in the constrained MSSM (CMSSM) [5,6] the universality of the scalar mass (m 0 ), gaugino mass (M 1/2 ), and trilinear coupling (A 0 ) are assumed at the unification scale. In this simplified model, flavor and CP violating processes arise only through the Cabbibo-Kobayashi-Maskawa (CKM) matrix and are suppressed due to the smallness of the CKM matrix elements. However, there is no compelling reason to take the boundary scale of the soft-supersymmetry breaking parameters to be the GUT scale, and it is quite plausible that it is above the GUT scale (the so-called super-GUT scenarios, see Refs. [7-10]) or below the GUT scale (the so-called sub-GUT scenarios, see Refs. [11][12][13][14]). In the case of super-GUT models, the low-scale soft-supersymmetry breaking parameters are affected by which SUSY GUT model is chosen, because of the renormalization group (RG) running between the input scale and the unification scale.Grand unified theories based on SU (5) are among the more minimal options; each generation of quarks and leptons are unified into a 5+10 representations of SU (5) [15][16][17]. Although neutrinos are massless in the SM, non-zero neutrino masses and mixing angles have been well established by the neutrino oscillation experiments [18][19][20]. In the c...

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“…As discussed in ref. [51], if the sfermion sector has large flavor violation, loop contributions may be significantly enhanced. For instance, large flavor violation in the squark masses can induce large corrections to the first and second generation Yukawa couplings, as in figure 4c, and accordingly large corrections to the colored Higgs Yukawa couplings.…”

Section: Proton Decaymentioning

confidence: 99%

“…We set the Yukawa interactions between the colored Higgs and matter fields by matching them with the SSM Yukawa couplings y u and y d ; see ref. [51] for details. In the analysis below, we treat tan β as an input parameter, trading µ and B with v and tan β by the electroweak symmetry breaking condition, as in conventional mSUGRA analyses.…”

Section: Example: Msugra-like Spectrummentioning

confidence: 99%

Grand unification, axion, and inflation in Intermediate Scale Supersymmetry

Hall

Nomura

Shirai

2014

J. High Energ. Phys.

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A class of supersymmetric grand unified theories is introduced that has a single scale below the cutoff, that of the supersymmetry breaking massesm. For a wide range of the dimensionless parameters, agreement with the observed mass of the Higgs boson determinesm ∼ 10 9 -10 13 GeV, yielding Intermediate Scale Supersymmetry. We show that within this framework it is possible for seesaw neutrino masses, axions, and inflation to be described by the scalem, offering the possibility of a unified origin of disparate phenomena. Neutrino masses allowing for thermal leptogenesis can be obtained, and the axion decay constant lies naturally in the range f a ∼ 10 9 -10 11 GeV, consistent with a recent observational suggestion of high scale inflation. A minimal SU(5) model is presented that illustrates these features. In this model, the only states at the grand unified scale are those of the heavy gauge supermultiplet. The grand unified partners of the Higgs doublets have a mass of orderm, leading to the dominant proton decay mode p →νK + , which may be probed in upcoming experiments. Dark matter may be winos, with mass environmentally selected to the TeV scale, and/or axions. Gauge coupling unification is found to be successful, especially if the wino is at the TeV scale.

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Sfermion flavor and proton decay in high-scale supersymmetry

Cited by 44 publications

References 104 publications

Higgsino dark matter in high-scale supersymmetry

Higgsino dark matter in high-scale supersymmetry

Revisiting flavor and CP violation in supersymmetric SU(5) with right-handed neutrinos

Grand unification, axion, and inflation in Intermediate Scale Supersymmetry

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