Grand unification in high-scale supersymmetry

Junji Hisano, Takumi Kuwahara, Natsumi Nagata

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47 Scopus citations


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 languageEnglish (US)
Pages (from-to)324-329
Number of pages6
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Issue number4-5
StatePublished - Jun 25 2013
Externally publishedYes

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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