Decoupling can revive minimal supersymmetric SU(5)

Hisano, Junji; Kobayashi, Daiki; Kuwahara, Takumi; Nagata, Natsumi

doi:10.1007/jhep07(2013)038

Cited by 89 publications

(98 citation statements)

References 64 publications

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“…The process proceeds via the exchange of either a charged wino or a Higgsino. 3 In PGM, we generally have |µ| ≫ |M 2 | and so the contribution from Higgsino exchange dominates [41]. 4 For these reasons, we focus on the charged Higgsino exchange process in what follows.…”

Section: Rmentioning

confidence: 99%

SU(5) grand unification in pure gravity mediation

2015

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We discuss the proton lifetime in pure gravity mediation models with nonuniversal Higgs soft masses. Pure gravity mediation offers a simple framework for studying SU(5) grand unified theories with a split supersymmetry like spectra. We find that for much of the parameter space gauge coupling unification is quite good leading to rather long lifetimes for the proton. However, for m 3/2 ∼ 60 TeV and tan β ∼ 4, for which gauge coupling unification is also good, the proton lifetime is short enough that it could be in reach of future experiments.

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Section: Rmentioning

confidence: 99%

SU(5) grand unification in pure gravity mediation

2015

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“…[42][43][44][45] (see also [46] for LHC implications and [47,48] for implications of proton decay bounds).…”

Section: The Setup and Main Highlightsmentioning

confidence: 99%

Low energy probes of PeV scale sfermions

Altmannshofer

Harnik

Zupan

2013

J. High Energ. Phys.

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We derive bounds on squark and slepton masses in mini-split supersymmetry scenario using low energy experiments. In this setup gauginos are at the TeV scale, while sfermions are heavier by a loop factor. We cover the most sensitive low energy probes including electric dipole moments (EDMs), meson oscillations and charged lepton flavor violation (LFV) transitions. A leading log resummation of the large logs of gluino to sfermion mass ratio is performed. A sensitivity to PeV squark masses is obtained at present from kaon mixing measurements. A number of observables, including neutron EDMs, µ to e transitions and charmed meson mixing, will start probing sfermion masses in the 100 TeV-1000 TeV range with the projected improvements in the experimental sensitivities. We also discuss the implications of our results for a variety of models that address the flavor hierarchy of quarks and leptons. We find that EDM searches will be a robust probe of models in which fermion masses are generated radiatively, while LFV searches remain sensitive to simple-texture based flavor models.

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“…Here, the 16 and 16-dimensional Higgs fields 16 H and 16 H are introduced to break the U(1) X gauge symmetry in SO (10). We assume that the mass parameters µ BL , µ 10 and µ H are around SUSY scale (m SU SY ) and µ S is much smaller to realize the tiny neutrino masses.…”

Section: Setup Of So(10) Susy Gutmentioning

confidence: 99%

“…This type of setup is called the high-scale SUSY [8]. In the high-scale SUSY, the gauge coupling unification is rather improved when only the gaugino masses are around 1 TeV [9], and the dangerous dimension-five proton decay is suppressed [10]. On the other hand, since tan β (the ratio of the VEVs of the two Higgs…”

Section: Introductionmentioning

confidence: 99%

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Flavor violating Z' from SO(10) SUSY GUT in High-Scale SUSY

Omura¹

2016

Proceedings of Flavor Physics &Amp; CP Violation 2015 — PoS(FPCP2015)

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We propose an SO(10) supersymmetric grand unified theory (SUSY GUT), where the SO(10) gauge symmetry breaks down to SU (3) c × SU (2) L × U (1) Y × U (1) X at the GUT scale and U (1) X is radiatively broken at the SUSY-braking scale. In order to achieve the observed Higgs mass around 126 GeV and also to satisfy constraints on flavor-and/or CP-violating processes, we assume that the SUSY-breaking scale is O(100) TeV, so that the U (1) X breaking scale is also O(100) TeV. One big issue in the SO(10) GUTs is how to realize realistic Yukawa couplings. In our model, not only 16-dimensional but also 10-dimensional matter fields are introduced to predict the observed fermion masses and mixings. The Standard-Model quarks and leptons are linear combinations of the 16-and 10-dimensional fields so that the U (1) X gauge interaction may be flavor-violating. We investigate the current constraints on the flavor-violating Z ′ interaction from the flavor physics and discuss prospects for future experiments. 1 I. INTRODUCTIONThe Grand Unified Theories (GUTs) are longstanding hypotheses, and continue to fascinate us because of the excellent explanation of mysteries in the Standard Model (SM). The GUTs unify not only the gauge groups but also quarks and leptons, and reveal the origin of the structure of the SM, such as the hypercharge assignment for the SM particles.The gauge groups in the SM areThe minimal candidate for the unified gauge group is SU(5), which was originally proposed by Georgi and Glashow [1]. There, quarks and leptons belong to 10-and 5-dimensional representations in SU (5), and the SM Higgs doublet is embedded into 5, introducing additional colored Higgs particle. One big issue is the unification of the SM gauge coupling constants, and it could be realized in the supersymmetric (SUSY) extension. It is well-known that the minimal SU(5) SUSY GUT realizes the gauge coupling unification around 2 × 10 16 GeV, if SUSY particle masses are around 1 TeV [2].Another candidate for the unified gauge group would be SO(10). It is non-minimal, but it would be an attractive extension because the SO(10) GUT explains the anomalyfree conditions in the SM. Furthermore, all leptons and quarks, including the right-handed neutrinos, in one generation may belong to one 16-dimensional representation in the minimal setup [3].On the other hand, the GUTs face several problems, especially because of the experimental constraints. One stringent constraint is from nonobservation of proton decay [1,4]. While the GUT scale in the SUSY GUT may be high enough to suppress the proton decay induced by the so-called X-boson exchange, the dimension-five operator generated by the colored Higgs exchange is severely constrained. Another stringent constraint is from the observed fermion masses and mixings. The SU(5) GUT predicts a common mass ratio of down-type quark and charged lepton in each generation. Furthermore, in the SO(10) GUT, the up-type, down-type quarks, and charged lepton in each generation would have common mass ratios if the all mat...

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Decoupling can revive minimal supersymmetric SU(5)

Cited by 89 publications

References 64 publications

SU(5) grand unification in pure gravity mediation

SU(5) grand unification in pure gravity mediation

Low energy probes of PeV scale sfermions

Flavor violating Z' from SO(10) SUSY GUT in High-Scale SUSY

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