Gravity waves and proton decay in a flipped SU(5) hybrid inflation model

Rehman, Mansoor Ur; Shafi, Qaisar; Zubair, Umer

doi:10.1103/PhysRevD.97.123522

Title: Gravity waves and proton decay in a flipped SU(5) hybrid inflation model

Journal Article · Thu Jun 14 00:00:00 EDT 2018 · Physical Review D

DOI:https://doi.org/10.1103/PhysRevD.97.123522· OSTI ID:1454318

Rehman, Mansoor Ur; Shafi, Qaisar; Zubair, Umer

We revisit supersymmetric hybrid inflation in the context of the flipped SU(5) model. With minimal superpotential and minimal Kähler potential, and soft supersymmetry (SUSY) masses of order (1–100) TeV, compatibility with the Planck data yields a symmetry breaking scale M of flipped SU(5) close to (2–4) × 10¹⁵ GeV. This disagrees with the lower limit M ≳ 7 × 10¹⁵ GeV set from proton decay searches by the Super-Kamiokande collaboration. We show how M close to the unification scale 2 × 10¹⁶ GeV can be reconciled with SUSY hybrid inflation by employing a nonminimal Kähler potential. Proton decays into e⁺π⁰ with an estimated lifetime of order 10³⁶ years. The tensor to scalar ratio r in this case can approach observable values ~10^-4–10^-3.

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Research Organization:: Univ. of Delaware, Newark, DE (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

Grant/Contract Number:: SC0013880

OSTI ID:: 1454318

Alternate ID(s):: OSTI ID: 1503866

Journal Information:: Physical Review D, Journal Name: Physical Review D Vol. 97 Journal Issue: 12; ISSN 2470-0010

Publisher:: American Physical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 9 works

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