Spontaneous B-L Breaking as the Origin of the Hot Early Universe

Abstract

The decay of a false vacuum of unbroken B-L symmetry is an intriguing and testable mechanism to generate the initial conditions of the hot early universe. If B-L is broken at the grand unification scale, the false vacuum phase yields hybrid inflation, ending in tachyonic preheating. The dynamics of the B-L breaking Higgs field and thermal processes produce an abundance of heavy neutrinos whose decays generate entropy, baryon asymmetry and gravitino dark matter. We study the phase transition for the full supersymmetric Abelian Higgs model. For the subsequent reheating process we give a detailed time-resolved description of all particle abundances. The competition of cosmic expansion and entropy production leads to an intermediate period of constant 'reheating' temperature, during which baryon asymmetry and dark matter are produced. Consistency of hybrid inflation, leptogenesis and gravitino dark matter implies relations between neutrino parameters and superparticle masses. In particular, for a gluino mass of 1 TeV, we find a lower bound on the gravitino mass of 10 GeV.

64 pages, 8 figures, 1 table. v2: minor numerical corrections, slightly different parameter point chosen in section 4, final results unchanged

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• GUT Physics in the era of the LHC
• Boltzmann or Bogoliubov? Approaches Compared in Gravitational Particle Production
• WIMP Dark Matter from Gravitino Decays and Leptogenesis
• Long-lived higgsinos as probes of gravitino dark matter at the LHC
• Leptogenesis with a dynamical seesaw scale
• Metastable strings and dumbbells in supersymmetric hybrid inflation
• Constraining the Cosmic Strings Gravitational Wave Spectra in No Scale Inflation with Viable Gravitino Dark matter and Non Thermal Leptogenesis
• Inflation and Leptogenesis in High-Scale Supersymmetry
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• From Hybrid to Quadratic Inflation With High-Scale Supersymmetry Breaking
• Dynamical D-Terms in Supergravity
• Gravitino Dark matter, Non Thermal Leptogenesis and Low reheating temperature in No-scale Higgs Inflation
• Probing the Supersymmetry-Mass Scale With F-term Hybrid Inflation
• Freeze-In of radiative keV-scale neutrino dark matter from a new $\text{U}(1{)}_{\text{B-L}}$
• Inflation, Proton Decay and Gravitational Waves from Metastable Strings in $SU(4{)}_C\times SU(2{)}_L\times U(1{)}_R$ Model
• Leptogenesis with perturbations in type-II and type-III seesaw models