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Hierarchy problem, gauge coupling unification at the Planck scale, and vacuum stability
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| Title: | Hierarchy problem, gauge coupling unification at the Planck scale, and vacuum stability |
| Authors: | Haba, Naoyuki Browse this author | | Ishida, Hiroyuki Browse this author | | Takahashi, Ryo Browse this author | | Yamaguchi, Yuya Browse this author |
| Issue Date: | Nov-2015 |
| Publisher: | Elsevier |
| Journal Title: | Nuclear Physics B |
| Volume: | 900 |
| Start Page: | 244 |
| End Page: | 258 |
| Publisher DOI: | 10.1016/j.nuclphysb.2015.09.004 |
| Abstract: | 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. |
| Rights: | http://creativecommons.org/licenses/by/4.0/ |
| Type: | article |
| URI: | http://hdl.handle.net/2115/60454 |
| Appears in Collections: | 理学院・理学研究院 (Graduate School of Science / Faculty of Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 山口 雄也
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