Hierarchy problem, gauge coupling unification at the Planck scale, and vacuum stability

Haba, Naoyuki; Ishida, Hiroyuki; Takahashi, Ryo; Yamaguchi, Yuya

Hierarchy problem, gauge coupling unification at the Planck scale, and vacuum stability

Haba, Naoyuki; Ishida, Hiroyuki; Takahashi, Ryo et al.

Nuclear Physics B, 2015, 900, 244-258

Permalink : https://hdl.handle.net/2115/60454

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アクセス権	open access
URI	https://hdl.handle.net/2115/60454
タイトル	Hierarchy problem, gauge coupling unification at the Planck scale, and vacuum stability
著者	Haba, Naoyuki ; Ishida, Hiroyuki ; Takahashi, Ryo ; Yamaguchi, Yuya
著者名 Haba, Naoyuki
著者名 Ishida, Hiroyuki
著者名 Takahashi, Ryo
著者名 Yamaguchi, Yuya
言語	英語
発行日	2015-11
出版者	Elsevier
収録物名	Nuclear Physics B
巻(号)	900
ページ	244-258
抄録	From the point of view of the gauge hierarchy problem, introducing an intermediate scale in addition to TeV scale and the Planck scale (M-Pl = 2.4 x10(18) GeV) is unfavorable. In that way, a gauge coupling unification (GCU) is expected to be realized at M-P1. We explore possibilities of GCU at M-Pl by adding a few extra particles with TeV scale mass into the standard model (SM). When extra particles are fermions and scalars (only fermions) with the same mass, the GCU at M-Pl can (not) be realized. On the other hand, when extra fermions have different masses, the GCU can be realized around root 8 pi M-Pl without extra scalars. This simple SM extension has two advantages that a vacuum becomes stable up to M-Pl(root 8 pi M-Pl) and a proton lifetime becomes much longer than an experimental bound. (C) 2015 The Authors. Published by Elsevier B.V.
資源タイプ	学術雑誌論文
出版タイプ	Version of Record
権利情報	Creative Commons Attribution 4.0 International
PISSN	0550-3213
関連情報 (isIdenticalTo)	出版社版DOI https://doi.org/10.1016/j.nuclphysb.2015.09.004