Combining high-scale inflation with low-energy SUSY

Antusch, Stefan; Dutta, Koushik; Halter, Sebastian

doi:10.1007/jhep03(2012)105

Cited by 13 publications

(12 citation statements)

References 83 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This is crucial to have full control over the inflationary dynamics since it determines the properties of all directions orthogonal to the inflaton and fixes all the mass and energy scales in the model. On top of moduli stabilisation, other important issues to trust inflationary models building are the study of the post-inflationary cosmological history starting with reheating [9][10][11][12][13] and the interplay between inflation and other phenomenological implications of the same model like the supersymmetry breaking scale [14][15][16][17][18], the nature of dark matter [19][20][21][22][23] and dark radiation [24][25][26][27] or the origin of the matter-antimatter asymmetry [28,29].…”

Section: Introductionmentioning

confidence: 99%

Global embedding of fibre inflation models

Cicoli

Muia

Shukla

2016

J. High Energ. Phys.

View full text Add to dashboard Cite

We present concrete embeddings of fibre inflation models in globally consistent type IIB Calabi-Yau orientifolds with closed string moduli stabilisation. After performing a systematic search through the existing list of toric Calabi-Yau manifolds, we find several examples that reproduce the minimal setup to embed fibre inflation models. This involves Calabi-Yau manifolds with h 1,1 = 3 which are K3 fibrations over a P 1 base with an additional shrinkable rigid divisor. We then provide different consistent choices of the underlying brane set-up which generate a non-perturbative superpotential suitable for moduli stabilisation and string loop corrections with the correct form to drive inflation. For each Calabi-Yau orientifold setting, we also compute the effect of higher derivative contributions and study their influence on the inflationary dynamics.

show abstract

Section: Introductionmentioning

confidence: 99%

Global embedding of fibre inflation models

Cicoli

Muia

Shukla

2016

J. High Energ. Phys.

View full text Add to dashboard Cite

show abstract

“…We note that during inflation W = W φ = 0 for tribrid inflation, which e.g. has the nice feature that it allows to combine low scale supersymmetry breaking with high scale inflation, as discussed in [24,25]. The superfield φ contains the inflaton as scalar component.…”

Section: Tribrid Inflation and Conventional Susy Hybrid Inflationmentioning

confidence: 84%

Nonthermal gravitino production in tribrid inflation

Antusch

Dutta

2015

Phys. Rev. D

Self Cite

View full text Add to dashboard Cite

We investigate non-thermal gravitino production after tribrid inflation in supergravity, which is a variant of supersymmetric hybrid inflation where three fields are involved in the inflationary model and where the inflaton field resides in the matter sector of the theory. In contrast to conventional supersymmetric hybrid inflation, where non-thermal gravitino production imposes severe constraints on the inflationary model, we find that the "non-thermal gravitino problem" is generically absent in models of tribrid inflation, mainly due to two effects: (i) With the inflaton in tribrid inflation (after inflation) being lighter than the waterfall field, the latter has a second decay channel with a much larger rate than for the decay into gravitinos. This reduces the branching ratio for the decay of the waterfall field into gravitinos. (ii) The inflaton generically decays later than the waterfall field, and does not produce gravitinos when it decays. This leads to a dilution of the gravitino population from the decays of the waterfall field. The combination of both effects generically leads to a strongly reduced gravitino production in tribrid inflation. It may only be charged under some R symmetry. † A more general form reads W = κ X (H − M 2 ) + λ H m φ n , with , m, n ≥ 2 [22,23].

show abstract

“…See [15][16][17][18][19][20][21] for other discussions of bi-axion inflation combined with SUSY, where the axions have alternative UV realizations. See [22][23][24][25][26][27][28] for other attempts to reconcile low energy SUSY and inflation from a UV perspective. We will also explore the possible new signatures from extra fields in the axion supermultiplets, most notably in the form of primordial non-Gaussianities (NG) in the cosmological collider physics program [29][30][31][32][33][34][35][36][37][38][39] as well as periodic modulations in the CMB [13,[40][41][42][43][44][45][46][47][48].…”

Section: Introductionmentioning

confidence: 99%

Supersymmetric inflation from the fifth dimension

Deshpande

Sundrum

2019

J. High Energ. Phys.

View full text Add to dashboard Cite

We develop a supersymmetric bi-axion model of high-scale inflation coupled to supergravity, in which the axionic structure originates from, and is protected by, gauge symmetry in an extra dimension. While local supersymmetry (SUSY) is necessarily Higgsed at high scales during inflation we show that it can naturally survive down to the ∼ TeV scale in the current era in order to resolve the electroweak hierarchy problem. We show how a suitable inflationary effective potential for the axions can be generated at tree-level by charged fields under the higher-dimensional gauge symmetry. The inflationary trajectory lies along the lightest direction in the bi-axion field space, with periodic effective potential and an effective super-Planckian field range emerging from fundamentally sub-Planckian dynamics. The heavier direction in the field space is shown to also play an important role, as the dominant source of super-Higgsing during inflation. This model presents an interesting interplay of tuning considerations relating the electroweak hierarchy, cosmological constant and inflationary superpotential, where maximal naturalness favors SUSY breaking near the electroweak scale after inflation. The scalar superpartner of the axionic inflaton, the "sinflaton", can naturally have ∼ Hubble mass during inflation and sufficiently strong coupling to the inflaton to mediate primordial non-Gaussianities of observable strength in future 21-cm surveys. Non-minimal charged fields under the higher-dimensional gauge symmetry can contribute to periodic modulations in the CMB, within the sensitivity of ongoing measurements.

show abstract

Combining high-scale inflation with low-energy SUSY

Cited by 13 publications

References 83 publications

Global embedding of fibre inflation models

Global embedding of fibre inflation models

Nonthermal gravitino production in tribrid inflation

Supersymmetric inflation from the fifth dimension

Contact Info

Product

Resources

About