scholarly journals R-symmetry breaking in supersymmetric hybrid inflation

2013 ◽  
Vol 88 (10) ◽  
Author(s):  
Matthew Civiletti ◽  
Mansoor Ur Rehman ◽  
Eric Sabo ◽  
Qaisar Shafi ◽  
Joshua Wickman
Keyword(s):  
Symmetry Breaking ◽  
Hybrid Inflation ◽  
R Symmetry

scholarly journals No-scale hybrid inflation with R-symmetry breaking

2021 ◽  
Vol 2021 (2) ◽  
Author(s):  
Ahmad Moursy
Keyword(s):  
Symmetry Breaking ◽  
Parameter Space ◽  
Susy Breaking ◽  
Stabilization Mechanism ◽  
Inflation Dynamics ◽  
Decay Channels ◽  
Asymptotically Flat ◽  
Hybrid Inflation ◽  
R Symmetry

Abstract In this paper we provide a no-scale supergravity scenario of hybrid inflation with R-symmetry being broken maximally. We investigate the inflation dynamics in details in both cases of pure F-term hybrid inflation and when adding constant Fayet-Iliopoulos D-terms. The effective inflation potential is asymptotically flat in a region of the parameter space in both cases. We explore all regions in the parameter space when discussing the constraints from the observables. We point out a connection between inflation, R-symmetry breaking and GUT scales. The moduli backreaction and SUSY breaking effects are investigated in a specific stabilization mechanism. We emphasis that a successful reheating is not affected by R-symmetry breaking, but it has interesting consequences. We study the reheating in flipped GUT model. We argue in favor of Z2 symmetry associated with flipped GUT models to avoid phenomenologically dangerous operators and allow for decay channels for the inflaton to right-handed neutrinos (sneutrinos).

scholarly journals Harmonic hybrid inflation

2020 ◽  
Vol 2020 (12) ◽  
Author(s):  
Federico Carta ◽  
Nicole Righi ◽  
Yvette Welling ◽  
Alexander Westphal
Keyword(s):  
Domain Wall ◽  
Symmetry Breaking ◽  
Initial Conditions ◽  
Scalar Potential ◽  
Field Range ◽  
Slow Roll ◽  
Minimal Form ◽  
Wide Range ◽  
Hybrid Inflation ◽  
Type Iib String Theory

Abstract We present a mechanism for realizing hybrid inflation using two axion fields with a purely non-perturbatively generated scalar potential. The structure of the scalar potential is highly constrained by the discrete shift symmetries of the axions. We show that harmonic hybrid inflation generates observationally viable slow-roll inflation for a wide range of initial conditions. This is possible while accommodating certain UV arguments favoring constraints f ≲ MP and ∆ϕ60 ≲ MP on the axion periodicity and slow-roll field range, respectively. We discuss controlled ℤ2-symmetry breaking of the adjacent axion vacua as a means of avoiding cosmological domain wall problems. Including a minimal form of ℤ2-symmetry breaking into the minimally tuned setup leads to a prediction of primordial tensor modes with the tensor-to-scalar ratio in the range 10−4 ≲ r ≲ 0.01, directly accessible to upcoming CMB observations. Finally, we outline several avenues towards realizing harmonic hybrid inflation in type IIB string theory.

scholarly journals No-go for tree-level R-symmetry breaking

2017 ◽  
Vol 77 (11) ◽  
Author(s):  
Feihu Liu ◽  
Muyang Liu ◽  
Zheng Sun
Keyword(s):  
Symmetry Breaking ◽  
Tree Level ◽  
R Symmetry

scholarly journals Simplified R-symmetry breaking and low-scale gauge mediation

2012 ◽  
Vol 2012 (3) ◽  
Author(s):  
Jason L. Evans ◽  
Masahiro Ibe ◽  
Matthew Sudano ◽  
Tsutomu T. Yanagida
Keyword(s):  
Symmetry Breaking ◽  
Gauge Mediation ◽  
R Symmetry

scholarly journals Dynamical SUSY and R-symmetry breaking in SQCD with massive and massless flavors

2008 ◽  
Vol 2008 (10) ◽  
pp. 092-092 ◽  
Author(s):  
Amit Giveon ◽  
Andrey Katz ◽  
Zohar Komargodski ◽  
David Shih
Keyword(s):  
Symmetry Breaking ◽  
R Symmetry

SO(10) grand unification with a low-energy SU(2)R-symmetry-breaking scaleMR

1993 ◽  
Vol 70 (21) ◽  
pp. 3189-3192 ◽  
Author(s):  
N. G. Deshpande ◽  
E. Keith ◽  
T. G. Rizzo
Keyword(s):  
Symmetry Breaking ◽  
Low Energy ◽  
Grand Unification ◽  
R Symmetry
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