Detectable dimension-6 proton decay in SUSY SO(10) GUT at Hyper-Kamiokande

Haba, Naoyuki; Mimura, Yukihiro; Yamada, Toshifumi

doi:10.1007/jhep07(2019)155

Cited by 7 publications

(1 citation statement)

References 23 publications

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“…Proton decay mediated by colored Higgsinos in supersymmetric grand unified theories (SUSY GUTs) [1,2], called dimension-five proton decay, is a primary target in the proton decay searches at HyperKamiokande [3], JUNO [4], and DUNE [5,6]. This is because the GUT gauge boson mass is predicted to be ∼ 2 • 10 16 GeV in usual SUSY GUTs and the corresponding partial width of GUT gauge boson-mediated proton decay is out of the sensitivity ranges of the above experiments (however, proton decay mediated by (3, 2, 1/6) gauge boson in SUSY SO (10) GUT can be accessible [7]). In non-SUSY GUTs, GUT gauge boson-mediated proton decay can be within the experimental reach, and one can even set upper bounds on the proton lifetime in some cases [8].…”

Section: Introductionmentioning

confidence: 99%

Moderately suppressed dimension-five proton decay in a flipped SU(5) model

Haba

Yamada

2022

J. High Energ. Phys.

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We study colored Higgsino-mediated proton decay (dimension-five proton decay) in a model based on the flipped SU(5) GUT. In the model, the GUT-breaking 10, $$ \overline{\mathbf{10}} $$ 10 ¯ fields have a GUT-scale mass term and gain VEVs through higher-dimensional operators, which induces an effective mass term between the color triplets in the 5, $$ \overline{\mathbf{5}} $$ 5 ¯ Higgs fields that is not much smaller than the GUT scale. This model structure gives rise to observable dimension-five proton decay, and at the same time achieves moderate suppression on dimension-five proton decay that softens the tension with the current bound on Γ(p → K+$$ \overline{\nu} $$ ν ¯ ). We investigate the flavor dependence of the Wilson coefficients of the operators relevant to dimension-five proton decay, by relating them with diagonalized Yukawa couplings and CKM matrix components in MSSM, utilizing the fact that the GUT Yukawa couplings are in one-to-one correspondence with the MSSM Yukawa couplings in flipped models. Then we numerically evaluate the Wilson coefficients, and predict the distributions of the ratios of the partial widths of various proton decay modes.

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Section: Introductionmentioning

confidence: 99%

Moderately suppressed dimension-five proton decay in a flipped SU(5) model

Haba

Yamada

2022

J. High Energ. Phys.

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Inflationary Universe with a Coleman-Weinberg potential meets non-thermal leptogenesis

Panotopoulos

2021

Astroparticle Physics

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Enhanced $\Gamma(p\to K^0\mu^+)/\Gamma(p\to K^+\bar{\nu}_\mu)$ as a signature of minimal renormalizable SUSY SO (10) GUT

Haba

Mimura

Yamada

2020

Progress of Theoretical and Experimental Physics

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The ratio of the partial widths of some dimension-5 proton decay modes can be predicted without detailed knowledge of supersymmetric (SUSY) particle masses, and this allows us to experimentally test various SUSY grand unified theory (GUT) models without discovering SUSY particles. In this paper, we study the ratio of the partial widths of the $p\to K^0\mu^+$ and $p\to K^+\bar{\nu}_\mu$ decays in the minimal renormalizable SUSY $SO(10)$ GUT, under only a plausible assumption that the 1st- and 2nd-generation left-handed squarks are mass-degenerate. In the model, we expect that the Wilson coefficients of dimension-5 operators responsible for these modes are on the same order and that the ratio of $p\to K^0\mu^+$ and $p\to K^+\bar{\nu}_\mu$ partial widths is $O(0.1)$. Hence, we may be able to detect both $p\to K^0\mu^+$ and $p\to K^+\bar{\nu}_\mu$ decays at Hyper-Kamiokande, thereby gaining a hint for the minimal renormalizable SUSY $SO(10)$ GUT. Moreover, since this partial width ratio is quite suppressed in the minimal $SU(5)$ GUT, it allows us to distinguish the minimal renormalizable SUSY $SO(10)$ GUT from the minimal $SU(5)$ GUT. In the main body of the paper, we perform a fitting of the quark and lepton masses and flavor mixings with the Yukawa couplings of the minimal renormalizable $SO(10)$ GUT, and derive a concrete prediction for the partial width ratio based on the fitting results. We find that the partial width ratio generally varies in the range $0.05$–$0.6$, confirming the above expectation.

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Detectable dimension-6 proton decay in SUSY SO(10) GUT at Hyper-Kamiokande

Cited by 7 publications

References 23 publications

Moderately suppressed dimension-five proton decay in a flipped SU(5) model

Moderately suppressed dimension-five proton decay in a flipped SU(5) model

Inflationary Universe with a Coleman-Weinberg potential meets non-thermal leptogenesis

Enhanced $\Gamma(p\to K^0\mu^+)/\Gamma(p\to K^+\bar{\nu}_\mu)$ as a signature of minimal renormalizable SUSY SO (10) GUT

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