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

2018 ◽  
Vol 97 (12) ◽  
Author(s):  
Mansoor Ur Rehman ◽  
Qaisar Shafi ◽  
Umer Zubair
Keyword(s):  
Gravity Waves ◽  
Proton Decay ◽  
Inflation Model ◽  
Hybrid Inflation

scholarly journals Observable proton decay in flipped SU(5)

2021 ◽  
Vol 2021 (2) ◽  
Author(s):  
Maria Mehmood ◽  
Mansoor Ur Rehman ◽  
Qaisar Shafi
Keyword(s):  
Neutrino Mass ◽  
Gauge Coupling ◽  
Proton Decay ◽  
Type I ◽  
Mass Model ◽  
Intermediate Scale ◽  
Decay Channels ◽  
Proton Lifetime ◽  
Hybrid Inflation ◽  
Neutrino Mass Models

Abstract We explore proton decay in a class of realistic supersymmetric flipped SU(5) models supplemented by a U(1)R symmetry which plays an essential role in implementing hybrid inflation. Two distinct neutrino mass models, based on inverse seesaw and type I seesaw, are identified, with the latter arising from the breaking of U(1)R by nonrenormalizable superpotential terms. Depending on the neutrino mass model an appropriate set of intermediate scale color triplets from the Higgs superfields play a key role in proton decay channels that include p → (e+, μ+) π0, p → (e+, μ+) K0, p →$$ \overline{v}{\pi}^{+} $$ v ¯ π + , and p →$$ \overline{v}{K}^{+} $$ v ¯ K + . We identify regions of the parameter space that yield proton lifetime estimates which are testable at Hyper-Kamiokande and other next generation experiments. We discuss how gauge coupling unification in the presence of intermediate scale particles is realized, and a Z4 symmetry is utilized to show how such intermediate scales can arise in flipped SU(5). Finally, we compare our predictions for proton decay with previous work based on SU(5) and flipped SU(5).

scholarly journals Red spectral tilt and observable gravity waves in shifted hybrid inflation

2011 ◽  
Vol 84 (10) ◽  
Author(s):  
Matthew Civiletti ◽  
Mansoor Ur Rehman ◽  
Qaisar Shafi ◽  
Joshua R. Wickman
Keyword(s):  
Gravity Waves ◽  
Hybrid Inflation ◽  
Spectral Tilt

scholarly journals Proton decay in supersymmetric SU(4)c × SU(2)L × SU(2)R

2020 ◽  
Vol 2020 (10) ◽  
Author(s):  
George Lazarides ◽  
Mansoor Ur Rehman ◽  
Qaisar Shafi
Keyword(s):  
Essential Role ◽  
Baryon Number ◽  
Proton Decay ◽  
Unified Theory ◽  
Grand Unified Theory ◽  
Decay Modes ◽  
Proposed Model ◽  
Hybrid Inflation ◽  
Gut Scale ◽  
Chiral Superfields

Abstract We discuss proton decay in a recently proposed model of supersymmetric hybrid inflation based on the gauge symmetry SU(4)c× SU(2)L× SU(2)R. A U(1) R symmetry plays an essential role in realizing inflation as well as in eliminating some undesirable baryon number violating operators. Proton decay is primarily mediated by a variety of color triplets from chiral superfields, and it lies in the observable range for a range of intermediate scale masses for the triplets. The decay modes include p → e+(μ+) + π0, $$ p\to \overline{\nu}+{\pi}^{+} $$ p → ν ¯ + π + , p → K0 + e+(μ+), and $$ p\to {K}^{+}+\overline{\nu} $$ p → K + + ν ¯ , with a lifetime estimate of order 1034–1036 yrs and accessible at Hyper-Kamiokande and future upgrades. The unification at the Grand Unified Theory (GUT) scale MGUT (∼ 1016 GeV) of the Minimal Supersymmetric Standard Model (MSSM) gauge couplings is briefly discussed.

scholarly journals LARGE NON-GAUSSIANITY FROM MULTI-BRID INFLATION

2011 ◽  
Vol 01 ◽  
pp. 108-113
Author(s):  
ATSUSHI NARUKO ◽  
MISAO SASAKI
Keyword(s):  
Scalar Field ◽  
General Feature ◽  
Present Model ◽  
The Other ◽  
Model Parameters ◽  
Exponential Potential ◽  
Inflation Model ◽  
Hybrid Inflation ◽  
Non Gaussian ◽  
Near Future

A model of multi-component hybrid inflation, dubbed multi-brid inflation, which may yield a large non-Gaussian paramter fNL, was proposed recently. In particular, for a two-brid inflation model with an exponential potential and the condition that the end of inflation is an ellipse in the field space, it was found that, while keeping the other observational quantities within the range consistent with observations, large non-Gaussianity is possible for certain inflationary trajectories. In this talk, in order to see if this result is a general feature of multi-brid inflation, we consider a model with a potential with an exponent quadratic in the scalar field components. We also consider a more general class of ellipses for the end of inflation. Focusing on the case of two-brid inflation, we find that large non-Gaussianity is also possible in the present model. Then by tuning the model parameters, we find that there exist models for which both the non-Gaussianity and the tensor-to-scalar ratio are large enough to be detected in the very near future.

scholarly journals μ -hybrid inflation with low reheat temperature and observable gravity waves

2017 ◽  
Vol 96 (6) ◽  
Author(s):  
Mansoor Ur Rehman ◽  
Qaisar Shafi ◽  
Fariha K. Vardag
Keyword(s):  
Gravity Waves ◽  
Hybrid Inflation

scholarly journals Natural hybrid inflation model with large non-Gaussianity

2012 ◽  
Vol 706 (4-5) ◽  
pp. 243-250 ◽  
Author(s):  
Ki-Young Choi ◽  
Bumseok Kyae
Keyword(s):  
Natural Hybrid ◽  
Inflation Model ◽  
Hybrid Inflation

scholarly journals Two-field axion-monodromy hybrid inflation model: Dante’s Waterfall

2015 ◽  
Vol 91 (4) ◽  
Author(s):  
Christopher D. Carone ◽  
Joshua Erlich ◽  
Anuraag Sensharma ◽  
Zhen Wang
Keyword(s):  
Inflation Model ◽  
Hybrid Inflation

scholarly journals supersymmetry in a hybrid inflation model

2001 ◽  
Vol 499 (3-4) ◽  
pp. 297-304 ◽  
Author(s):  
T. Watari ◽  
T. Yanagida
Keyword(s):  
Inflation Model ◽  
Hybrid Inflation

Smooth hybrid inflation on brane constrained by Planck data

2014 ◽  
Vol 29 (26) ◽  
pp. 1450146 ◽  
Author(s):  
M. Ferricha-Alami ◽  
H. Chakir ◽  
J. Inchaouh ◽  
M. Bennai
Keyword(s):  
Spectral Index ◽  
Index Formula ◽  
Type Ii ◽  
Planck Data ◽  
Inflation Model ◽  
Scalar Spectral Index ◽  
Central Value ◽  
Hybrid Inflation ◽  
Kähler Potential ◽  
Braneworld Model

It is shown that, in the supersymmetric smooth hybrid inflation model with the minimal Kähler potential, the spectral index ns is larger than 0.97 in the standard inflation. In this context, we study the smooth hybrid inflationary model in the framework of the Randall–Sundrum type-II braneworld model. We derive all known inflationary spectrum parameters which are widely consistent with Planck data for a particular choice of brane tension values λ especially for number of e-folds N = 50. We reproduce the central value of the scalar spectral index ns = 0.96 whereas the ratio r~(10-4-10-3). However, the running of the scalar spectral index [Formula: see text] is not excluded from the range given by the latest observational measurements.

scholarly journals Supergravity analysis of the hybrid inflation model from a D3-D7 system

2004 ◽  
Vol 69 (10) ◽  
Author(s):  
Fumikazu Koyama ◽  
Yuji Tachikawa ◽  
Taizan Watari
Keyword(s):  
Inflation Model ◽  
Hybrid Inflation
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