Grand unification in high-scale supersymmetry

Junji Hisano; Takumi Kuwahara; Natsumi Nagata

doi:10.1016/j.physletb.2013.05.017

Grand unification in high-scale supersymmetry

Junji Hisano
, Takumi Kuwahara
, Natsumi Nagata

Research output: Contribution to journal › Article › peer-review

56 Scopus citations

Abstract

A constraint on masses of superheavy gauge and Higgs multiplets at the grand unification (GUT) scale is obtained from the gauge coupling unification in the case of high-scale supersymmetry. We found that all of the particles may lie around a scale of 10¹⁶GeV so that the threshold corrections to the gauge coupling constants at the GUT scale are smaller than those in the case of the low-energy supersymmetry. In addition, the GUT scale tends to be slightly lower when the gauginos are heavier and, thus, the proton decay rate via the X-boson exchange process is expected to be enhanced.

Original language	English (US)
Pages (from-to)	324-329
Number of pages	6
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	723
Issue number	4-5
DOIs	https://doi.org/10.1016/j.physletb.2013.05.017
State	Published - Jun 25 2013
Externally published	Yes

Bibliographical note

Funding Information:
The work of N.N. is supported by Research Fellowships of the Japan Society for the Promotion of Science for Young Scientists . The work of J.H. is supported by Grant-in-Aid for Scientific research from the Ministry of Education, Science, Sports, and Culture (MEXT), Japan , Nos. 20244037 , 20540252 , 22244021 and 23104011 , and also by World Premier International Research Center Initiative (WPI Initiative), MEXT, Japan .

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10.1016/j.physletb.2013.05.017

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abstract = "A constraint on masses of superheavy gauge and Higgs multiplets at the grand unification (GUT) scale is obtained from the gauge coupling unification in the case of high-scale supersymmetry. We found that all of the particles may lie around a scale of 1016GeV so that the threshold corrections to the gauge coupling constants at the GUT scale are smaller than those in the case of the low-energy supersymmetry. In addition, the GUT scale tends to be slightly lower when the gauginos are heavier and, thus, the proton decay rate via the X-boson exchange process is expected to be enhanced.",

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AB - A constraint on masses of superheavy gauge and Higgs multiplets at the grand unification (GUT) scale is obtained from the gauge coupling unification in the case of high-scale supersymmetry. We found that all of the particles may lie around a scale of 1016GeV so that the threshold corrections to the gauge coupling constants at the GUT scale are smaller than those in the case of the low-energy supersymmetry. In addition, the GUT scale tends to be slightly lower when the gauginos are heavier and, thus, the proton decay rate via the X-boson exchange process is expected to be enhanced.

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Grand unification in high-scale supersymmetry

Abstract

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