Lifshitz-sector mediated SUSY breaking

Pospelov, Maxim; Tamarit, Carlos

doi:10.1007/jhep01(2014)048

Cited by 17 publications

(15 citation statements)

References 22 publications

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“…[24], where Hořava gravity is coupled to supersymmetric matter for which SUSY breaking is mediated by the Lorentz violations in the gravity sector. In this scenario, both the SUSY breaking and the Lorentz violations in the matter sector are controlled by the ratio ðM Ã =M p Þ 2 ; i.e., the suppression mechanism of Ref.…”

Section: Mixed-derivative Hořava Gravitymentioning

confidence: 99%

Uninvited guest in mixed derivative Hořava gravity

et al. 2016

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We revisit the mixed-derivative extension of Hořava gravity which was designed to address the naturalness problems of the standard theory in the presence of matter couplings. We consider the minimal theory with mixed-derivative terms that contain two spatial and two temporal derivatives. Including all terms compatible with the (modified) scaling rules and the foliation-preserving diffeomorphisms, we calculate the dispersion relations of propagating modes. We find that the theory contains four propagating degrees of freedom, as opposed to three in the standard Hořava gravity. The new degree of freedom is another scalar graviton, and it is unstable at low energies. Our result brings tension to the Lorentz-violation suppression mechanism that relies on separation of scales.

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Section: Mixed-derivative Hořava Gravitymentioning

confidence: 99%

Uninvited guest in mixed derivative Hořava gravity

et al. 2016

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“…However, due to the Lorentz violation, other excitations with different speeds might exist, unless a mechanism is invented to prevent this from happening, for example, by assuming that the matter sector satisfies the Lorentz symmetry up to the Planck scale [83,84]. 3 In (2+1)-dimensions, observational constraints from the Cherenkov effects are out of question, so in principle the speed of the spin-0 gravitons can be smaller than that of light.…”

Section: Non-projectable Hl Gravitymentioning

confidence: 99%

Lifshitz spacetimes, solitons, and generalized BTZ black holes in quantum gravity at a Lifshitz point

Shu

Lin

Wang

et al. 2014

J. High Energ. Phys.

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Abstract:In this paper, we study static vacuum solutions of quantum gravity at a fixed Lifshitz point in (2+1) dimensions, and present all the diagonal solutions in closed forms in the infrared limit. The exact solutions represent spacetimes with very rich structures: they can represent generalized BTZ black holes, Lifshitz space-times or Lifshitz solitons, in which the spacetimes are free of any kind of space-time singularities, depending on the choices of the free parameters of the solutions. We also find several classes of exact static non-diagonal solutions, which represent similar space-time structures as those given in the diagonal case. The relevance of these solutions to the non-relativistic Lifshitz-type gauge/gravity duality is discussed.

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“…Second, the breaking of LI can have significant effects on the low-energy physics through the interactions between gravity and matter, no matter how high the scale of symmetry breaking is [26]. Recently, it was proposed a mechanism of SUSY breaking by coupling a Lorentz-invariant supersymmetric matter sector to nonsupersymmetric gravitational interactions with Lifshitz scaling, and shown that it can lead to a consistent Hořava gravity [27] 1 . Another scenario is to go beyond the perturbative realm, so that strong interactions will take over at an intermediate scale (which is in between the Lorentz violation and the infrared (IR) scales) and accelerate the renormalization group (RG) flow quickly to the LI fixed point in the IR [31][32][33].…”

Section: Introductionmentioning

confidence: 99%

Hořava gravity at a Lifshitz point: A progress report

Wang

2017

Int. J. Mod. Phys. D

185

194

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Hořava gravity at a Lifshitz point is a theory intended to quantize gravity by using techniques of traditional quantum field theories. To avoid Ostrogradsky's ghosts, a problem that has been plaguing quantization of general relativity since the middle of 1970's, Hořava chose to break the Lorentz invariance by a Lifshitz-type of anisotropic scaling between space and time at the ultrahigh energy, while recovering (approximately) the invariance at low energies. With the stringent observational constraints and self-consistency, it turns out that this is not an easy task, and various modifications have been proposed, since the first incarnation of the theory in 2009. In this review, we shall provide a progress report on the recent developments of Hořava gravity. In particular, we first present four most-studied versions of Hořava gravity, by focusing first on their self-consistency and then their consistency with experiments, including the solar system tests and cosmological observations. Then, we provide a general review on the recent developments of the theory in three different but also related areas: (i) universal horizons, black holes and their thermodynamics; (ii) non-relativistic gauge/gravity duality; and (iii) quantization of the theory. The studies in these areas can be generalized to other gravitational theories with broken Lorentz invariance. CONTENTS

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Lifshitz-sector mediated SUSY breaking

Cited by 17 publications

References 22 publications

Uninvited guest in mixed derivative Hořava gravity

Uninvited guest in mixed derivative Hořava gravity

Lifshitz spacetimes, solitons, and generalized BTZ black holes in quantum gravity at a Lifshitz point

Hořava gravity at a Lifshitz point: A progress report

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