Baryogenesis in theories with large extra spatial dimensions

Allahverdi, Rouzbeh; Enqvist, Kari; Mazumdar, Anupam; Pérez‐Lorenzana, Abdel

doi:10.1016/s0550-3213(01)00474-6

Cited by 50 publications

(36 citation statements)

References 55 publications

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“…There is also a problem in the scenario of Affleck-Dine baryogenesis [32], since the expectation value of a field on a brane cannot become much larger than the typical mass scale of the brane [33]. One can solve this problem by introducing non-trivial defect configuration structures [34].…”

Section: Cosmological Relicsmentioning

confidence: 99%

Generating the curvature perturbation with instant preheating

Matsuda

2007

J. Cosmol. Astropart. Phys.

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A new mechanism for generating the curvature perturbation at the end of inflaton has been investigated. The dominant contribution to the primordial curvature perturbation may be generated during the period of instant preheating. The mechanism converts isocurvature perturbation related to a light field into curvature perturbation, where the "light field" is not the inflaton field. This mechanism is important in inflationary models where kinetic energy is significant at the end of inflaton. We show how one can apply this mechanism to various brane inflationary models.

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Section: Cosmological Relicsmentioning

confidence: 99%

Generating the curvature perturbation with instant preheating

Matsuda

2007

J. Cosmol. Astropart. Phys.

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“…In Sec.2 we will discuss inhomogeneous preheating 2 Of course there are many other problems in low-scale inflation that are related to other cosmological issues. We think the most significant condition appears from baryogenesis [3,4,5] in case the electro-weak baryogenesis fails. 3 The original curvaton is not suitable for low-scale inflation because of the strict lower bound for the Hubble parameter [7].…”

Section: Introductionmentioning

confidence: 89%

Hybrid curvatons from broken symmetry

Matsuda¹

2007

J. High Energy Phys.

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We present a new general mechanism for generating curvature perturbations after inflation. Our model is based on the simple assumption that a field that starts to oscillate after inflation has a potential characterized by an underlying global symmetry that is slightly or badly broken. Inhomogeneous preheating occurs due to the oscillation with the broken symmetry. Unlike the traditional curvaton model, we will not identify the curvaton with the oscillating field. The curvaton is identified with the preheat field that could be either a scalar, vector, or fermionic field. We introduce an explicit mass term for the curvaton, which is important for later evolution and the decay. Our present model represents the simplest example of the hybrid of the curvatons and inhomogeneous preheating.

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“…One example of a model of baryogenesis in the MeV to GeV regime was constructed in [34], where the inflaton decay products in turn have baryon-number violating decays, an out of equilibrium process. Other mechanisms for baryogenesis with low-scale inflation in the context of Large Extra Dimensions have been considered in [33,[35][36][37][38], and directly apply to the linear dilaton scenario.…”

Section: Cosmologymentioning

confidence: 99%

Graviton phenomenology of linear dilaton geometries

Baryakhtar

2012

Phys. Rev. D

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Five-dimensional geometries with a linearly varying dilaton background arise as gravity duals of TeV Little String Theories (LSTs) and provide a solution of the hierarchy problem through extra dimensions. The unique Kaluza-Klein graviton spectrum has a mass gap on the order of the dilaton slope followed by a closely spaced discretum of states. We study in detail the graviton phenomenology in this scenario, allowing the dilaton slope to vary from the MeV to the TeV scale. When the dilaton slope is large enough so that individual KK resonances can be resolved at the LHC, several of them can be discovered simultaneously and allow for the linear dilaton geometry to be uniquely identified. For much smaller values of the dilaton slope, the LHC signatures become similar to the 5-d ADD scenario while relaxing the astrophysical and experimental constraints. Due to the mass gap, the KK modes are produced on-shell and decay inside the LHC detector, modifying the diphoton and dilepton spectra at large invariant mass. Finally, we perform a similar analysis for the low curvature RS geometry. We present experimental limits and calculate the ultimate reach of a 14 TeV LHC for all the above scenarios.

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Baryogenesis in theories with large extra spatial dimensions

Cited by 50 publications

References 55 publications

Generating the curvature perturbation with instant preheating

Generating the curvature perturbation with instant preheating

Hybrid curvatons from broken symmetry

Graviton phenomenology of linear dilaton geometries

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