Scalars with Higher Derivatives in Supergravity and Cosmology

Lehners, Jean-Luc

doi:10.1007/978-3-319-03774-5_7

Cited by 3 publications

(2 citation statements)

References 79 publications

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“…We therefore approximate the solution for small τ , following the approach in [16]. Because ( 17) is a cubic equation, one obtains three different solution branches, as discussed in [16,20]. Selecting the ordinary solution branch…”

Section: Higher-derivative Supersymmetric Gauge Theorymentioning

confidence: 99%

Supersymmetric k-defects

Koehn

Trodden

2016

Physics Letters B

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In supersymmetric theories, topological defects can have nontrivial behaviors determined purely by whether or not supersymmetry is restored in the defect core. A well-known example of this is that some supersymmetric cosmic strings are automatically superconducting, leading to important cosmological effects and constraints. We investigate the impact of nontrivial kinetic interactions, present in a number of particle physics models of interest in cosmology, on the relationship between supersymmetry and supercurrents on strings. We find that in some cases it is possible for superconductivity to be disrupted by the extra interactions.

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Section: Higher-derivative Supersymmetric Gauge Theorymentioning

confidence: 99%

Supersymmetric k-defects

Koehn

Trodden

2016

Physics Letters B

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“…In this section we study a different theory with higher-derivatives that is known to be ghostfree, since it does not introduce additional degrees of freedom (poles in the propagator) [19,20,21,22]. Its Lagrangian is…”

Section: "Unfolding" a Higher-derivative Ghost-free Chiral Theorymentioning

confidence: 99%

Effective operators in SUSY, superfield constraints and searches for a UV completion

Dudas

Ghilencea

2015

J. High Energ. Phys.

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Abstract:We discuss the role of a class of higher dimensional operators in 4D N=1 supersymmetric effective theories. The Lagrangian in such theories is an expansion in momenta below the scale of "new physics" (Λ) and contains the effective operators generated by integrating out the "heavy states" above Λ present in the UV complete theory. We go beyond the "traditional" leading order in this momentum expansion (in ∂/Λ). Keeping manifest supersymmetry and using superfield constraints we show that the corresponding higher dimensional (derivative) operators in the sectors of chiral, linear and vector superfields of a Lagrangian can be "unfolded" into second-order operators. The "unfolded" formulation has only polynomial interactions and additional massive superfields, some of which are ghost-like if the effective operators were quadratic in fields. Using this formulation, the UV theory emerges naturally and fixes the (otherwise unknown) coefficient and sign of the initial (higher derivative) operators. Integrating the massive fields of the "unfolded" formulation generates an effective theory with only polynomial effective interactions relevant for phenomenology. We also provide several examples of "unfolding" of theories with higher derivative interactions in the gauge or matter sectors that are actually ghost-free. We then illustrate how our method can be applied even when including all orders in the momentum expansion, by using an infinite set of superfield constraints and an iterative procedure, with similar results.

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Impacts of supersymmetric higher derivative terms on inflation models in supergravity

Aoki

Yamada

2015

J. Cosmol. Astropart. Phys.

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We show the effects of supersymmetric higher derivative terms on inflation models in supergravity. The results show that such terms generically modify the effective kinetic coefficient of the inflaton during inflation if the cut off scale of the higher derivative operators is sufficiently small. In such a case, the η-problem in supergravity does not occur, and we find that the effective potential of the inflaton generically becomes a power type potential with a power smaller than two. *

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Scalars with Higher Derivatives in Supergravity and Cosmology

Cited by 3 publications

References 79 publications

Supersymmetric k-defects

Supersymmetric k-defects

Effective operators in SUSY, superfield constraints and searches for a UV completion

Impacts of supersymmetric higher derivative terms on inflation models in supergravity

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