Supersymmetric and smooth hybrid inflation in the light of WMAP3

Rehman, Mansoor Ur; Şenoğuz, Vedat Nefer; Shafi, Qaisar

doi:10.1103/physrevd.75.043522

Cited by 81 publications

(125 citation statements)

References 63 publications

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“…It has previously been shown in the literature that each of these additional contributions can play an important role in the predictions of the model [1,8,18,19,13].…”

Section: Supersymmetric Hybrid Inflationmentioning

confidence: 99%

“…For large tensor modes, we will see that an intermediate-scale soft mass remains important, yet in the present case we will have M 2 S > 0 as in split supersymmetry models [20]. We take a at constant values, which can be achieved via an appropriate choice of initial conditions [13]. The values we consider will be discrete, with the intention of representing the possible sign choices for a.…”

Section: Supersymmetric Hybrid Inflationmentioning

confidence: 99%

“…In a number of recent analyses, it has been shown that the scalar spectral index n s can obtain the WMAP central value in SUSY models of inflation using a minimal [14,15] or non-minimal [16,13] form of the Kähler potential in Eq. (4).…”

Section: Supersymmetric Hybrid Inflationmentioning

confidence: 99%

“…[1,13,14,15]). In this letter, we will show that the inclusion of higher order corrections from multiple sources can open up a region of parameter space that can support r-values large enough to be observed by the current Planck satellite observatory.…”

Section: Introductionmentioning

confidence: 99%

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Observable gravity waves from supersymmetric hybrid inflation

Shafi¹,

Wickman²

2011

Physics Letters B

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“…It has previously been shown in the literature that each of these additional contributions can play an important role in the predictions of the model [1,8,18,19,13].…”

Section: Supersymmetric Hybrid Inflationmentioning

confidence: 99%

Section: Supersymmetric Hybrid Inflationmentioning

confidence: 99%

Section: Supersymmetric Hybrid Inflationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Observable gravity waves from supersymmetric hybrid inflation

Shafi¹,

Wickman²

2011

Physics Letters B

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“…The non-minimal Kähler potential plays a crucial role in reducing n s and making it compatible with the WMAP7 data as shown in Refs. [17,18,19]. In SUSY SU(5) shifted hybrid inflation we show that the central value of the scalar spectral index n s ≃ 0.96 can be realized in the presence of a small negative mass term generated from a non-minimal Kähler potential.…”

Section: Introductionmentioning

confidence: 87%

Inflation in supersymmetricSU(5)

Khalil

Rehman²,

Shafi³

et al. 2011

Phys. Rev. D

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We analyze the adjoint field inflation in supersymmetric (SUSY) SU (5) model. In minimal SUSY SU (5) hybrid inflation monopoles are produced at the end of inflation. We therefore explore the non-minimal model of inflation based on SUSY SU (5), like shifted hybrid inflation, which provides a natural solution for the monopole problem. We find that the supergravity corrections with non-minimal Kähler potential are crucial to realize the central value of the scalar spectral index n s ≃ 0.96 consistent with the seven year WMAP data. The tensor to scalar ratio r is quite small, taking on values r 10 −5 . Due to R-symmetry massless SU (3) octet and SU (2) triplet supermultiplets are present and could spoil gauge coupling unification. To keep gauge coupling unification intact, light vector-like particles are added which are expected to be observed at LHC.

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Dark matter as a remnant of SQCD inflation

Bhattacharya

Saha

Sil

et al. 2018

J. High Energ. Phys.

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We propose a strongly coupled supersymmetric gauge theory that can accommodate both the inflation (in the form of generalized hybrid inflation) and dark matter (DM).In this set-up, we identify the DM as the Goldstones associated with the breaking of a global symmetry (SU (4) × SU (4) → SU (4)) after inflation ends. Due to the non-abelian nature of this symmetry, the scenario provides with multiple DMs. We then construct a low energy theory which generates a Higgs portal like coupling of the DMs with Standard Model (SM), thus allowing them to thermally freeze out. While the scales involved in the inflation either have a dynamical origin or related to UV interpretation in terms of a heavy quark field in the supersymmetric QCD (SQCD) sector, the DM masses however are generated from explicit breaking of the chiral symmetry of the SQCD sector. We discuss DM phenomenology for both degenerate and non-degenerate cases, poised with DM-DM interactions and find allowed region of parameter space in terms of relic density and direct search constraints. IntroductionAmidst the great success of the Standard Model (SM) of particle physics, there are several intriguing issues which indicate that the SM should be extended or supplemented by some other sector (including new fields and/or gauge symmetry) in order to provide a more complete description of nature. In particular, SM fails to accommodate a large share of energy density of the universe (25%), called dark matter (DM). On the other hand, the idea of primordial inflation serves as an elegant construction which can actually resolve some of the intricate problems (e.g horizon and flatness problems) of otherwise quite successful Big Bang cosmology. This inflationary hypothesis is further strengthened by its prediction on the primordial perturbation that leads to striking agreements with the observation of the cosmic microwave background radiation (CMBR) spectrum. However, SM alone can not be responsible for such 1 subhaditya@iitg.ac.in 2 abhijit.saha@iitg.ac.in 3 asil@iitg.ac.in

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Supersymmetric and smooth hybrid inflation in the light of WMAP3

Cited by 81 publications

References 63 publications

Observable gravity waves from supersymmetric hybrid inflation

Observable gravity waves from supersymmetric hybrid inflation

Inflation in supersymmetricSU(5)

Dark matter as a remnant of SQCD inflation

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