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language
eng
Author
Mimura, Yukihiro Institute of Science and Engineering, Shimane University, Matsue 690-8504, Japan
Description
In preparation for upcoming nucleon decay searches at Hyper-Kamiokande, it is important to derive a theoretical upper bound on the proton lifetime in a general class of grand unified theory (GUT) models. In this paper, we make an attempt along this direction for non-SUSY SU(5) models, under the mild restrictions that only one or two SM-decomposed multiplets are singularly light, and that the SU(5) gauge theory is asymptotically free and thus there are no too large representations in the model.We derive criteria for SM-decomposed multiplets that potentially enhance the proton lifetime when they are singularly light. We perform a numerical analysis on the proton lifetime and show that some choices of singularly light multiplets can provide a testable upper bound on the proton lifetime.
Journal Title
PHYSICAL REVIEW D
Volume
99
Issue
7
ISSN
2470-0010
ISSN(Online)
2470-0029
Published Date
2019-04-16
DOI
Publisher
the American Physical Society
NII Type
Journal Article
Format
PDF
Relation
Text Version
出版社版
Gyoseki ID
e37168
OAI-PMH Set
Faculty of Science and Engineering