Supersymmetric inflation, baryogenesis and νμ−ντ oscillations

Lazarides, George; Shafi, Qaisar; Vlachos, N.D.

doi:10.1016/s0370-2693(98)00306-2

Cited by 33 publications

(43 citation statements)

References 9 publications

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“…In other words, for fixed n, m δφ depends only on r ± and not on λ, M, c − , or c + separately. Note that the resulting values of m δφ are almost two orders of magnitude lower than the values obtained in similar models [11-15, 40, 41] and so the successful activation of the mechanism of non-thermal leptogenesis [58][59][60][61][62] is an important open issue.…”

Section: Jhep11(2015)114mentioning

confidence: 85%

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Shift symmetry and Higgs inflation in supergravity with observable gravitational waves

Lazarides¹,

Pallis²

2015

J. High Energ. Phys.

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Abstract:We demonstrate how to realize within supergravity a novel chaotic-type inflationary scenario driven by the radial parts of a conjugate pair of Higgs superfields causing the spontaneous breaking of a grand unified gauge symmetry at a scale assuming the value of the supersymmetric grand unification scale. The superpotential is uniquely determined at the renormalizable level by the gauge symmetry and a continuous R symmetry. We select two types of Kähler potentials, which respect these symmetries as well as an approximate shift symmetry. In particular, they include in a logarithm a dominant shift-symmetric term proportional to a parameter c − together with a small term violating this symmetry and characterized by a parameter c + . In both cases, imposing a lower bound on c − , inflation can be attained with subplanckian values of the original inflaton, while the corresponding effective theory respects perturbative unitarity for r ± = c + /c − ≤ 1. These inflationary models do not lead to overproduction of cosmic defects, are largely independent of the one-loop radiative corrections and accommodate, for natural values of r ± , observable gravitational waves consistently with all the current observational data. The inflaton mass is mostly confined in the range (3.7 − 8.1) × 10 10 GeV.

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Section: Jhep11(2015)114mentioning

confidence: 85%

“…This breaking provides large Majorana masses to the ν c i 's, which then generate the tiny neutrino masses via the seesaw mechanism. Furthermore, the out-ofequilibrium decay of the ν c i 's provides us with a robust baryogenesis scenario via nonthermal leptogenesis [58][59][60][61][62].…”

Section: Jhep11(2015)114mentioning

confidence: 99%

Shift symmetry and Higgs inflation in supergravity with observable gravitational waves

Lazarides¹,

Pallis²

2015

J. High Energ. Phys.

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“…The discussion proceeds along the lines discussed in Ref. [30], where it was shown that a baryon asymmetry of the desired magnitude is readily obtained.…”

Section: Inflation and Leptogenesismentioning

confidence: 99%

Inflationary cosmology with five dimensionalSO(10)

Kyae

Shafi

2004

Phys. Rev. D

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We discuss inflationary cosmology in a five dimensional SO(10) model compactified on S 1 /(Z 2 ×Z ′ 2 ), which yields SU (3) c ×SU (2) L ×U (1) Y ×U (1) X below the compactification scale. The gauge symmetry SU (5) × U (1) X is preserved on one of the fixed points, while "flipped" SU (5) ′ × U (1) ′ X is on the other fixed point. Inflation is associated with U (1) X breaking, and is implemented through F -term scalar potentials on the two fixed points. A brane-localized EinsteinHilbert term allows both branes to have positive tensions during inflation. The scale of U (1) X breaking is fixed from δT /T measurements to be around 10 16 GeV, and the scalar spectral index n = 0.98 − 0.99. The inflaton field decays into right-handed neutrinos whose subsequent out of equilibrium decay yield the observed baryon asymmetry via leptogenesis.

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“…This expression [11] can then be used to study neutrino masses and mixing from atmospheric [1] and solar [2] neutrino oscillations and to extract information [13] on N 1 . The range 10 9 − 10 13 GeV for M 1 is found to be consistent with [12], as it is bounded by the decay width of N 1 .…”

Section: Leptogenesismentioning

confidence: 99%

Neutrino Masses and Leptogenesis

2000

Proceedings of Third Latin American Symposium on High Energy Physics — PoS(silafae-III)

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Supersymmetric inflation, baryogenesis and νμ−ντ oscillations

Cited by 33 publications

References 9 publications

Shift symmetry and Higgs inflation in supergravity with observable gravitational waves

Shift symmetry and Higgs inflation in supergravity with observable gravitational waves

Inflationary cosmology with five dimensionalSO(10)

Neutrino Masses and Leptogenesis

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