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- Title
Detectable dimension-6 proton decay in SUSY SO(10) GUT at Hyper-Kamiokande.
- Authors
Haba, Naoyuki; Mimura, Yukihiro; Yamada, Toshifumi
- Abstract
In the minimal SUSY SU(5) GUT with O(1) TeV SUSY particles and O(1) or below self-coupling for the GUT-breaking Higgs field, the width of the dimension-6 proton decay is suppressed below the reach of Hyper-Kamiokande. In this paper, we point out that a SUSY SO(10) GUT which adopts only 4 5 H + 1 6 H + 16 ¯ H GUT-breaking Higgs fields leads to an enhanced dimension-6 proton decay width detectable at Hyper-Kamiokande. The enhancement is because the SU(5)-breaking VEV of 45H arises due to Planck-suppressed terms, W ∝ (45H2)2/M∗ + 45H4/M∗, and is therefore substantially larger than the other VEVs that conserve SU(5). As a result, the (3,2, 1/6) GUT gauge boson mass is about 1/5 smaller than the (3,2, −5/6) GUT gauge boson mass and can induce a fast dimension-6 proton decay. Through a numerical analysis on threshold corrections of the GUT gauge bosons and the physical components of the GUT-breaking Higgs fields, we confirm that the dimension-6 proton decay can be within the reach of Hyper-Kamiokande.
- Subjects
PROTON decay; GAUGE bosons; NUMERICAL analysis
- Publication
Journal of High Energy Physics, 2019, Vol 2019, Issue 7, pN.PAG
- ISSN
1126-6708
- Publication type
Article
- DOI
10.1007/JHEP07(2019)155