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Title: Complex Hybrid Inflation and Baryogenesis

Abstract

We propose a hybrid inflation model with a complex waterfall field which contains an interaction term that breaks the U(1) global symmetry associated with the waterfall field charge. We show that the asymmetric evolution of the real and imaginary parts of the complex field during the phase transition at the end of inflation translates into a charge asymmetry. The latter strongly depends on the vacuum expectation value of the waterfall field, which is well constrained by diverse cosmological observations.

Authors:
; ;  [1]
  1. Instituto de Fisica de la Universidad de Guanajuato, C.P. 37150, Leon, Guanajuato (Mexico)
Publication Date:
OSTI Identifier:
20951247
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review Letters; Journal Volume: 98; Journal Issue: 16; Other Information: DOI: 10.1103/PhysRevLett.98.161302; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ASYMMETRY; BARYONS; EVOLUTION; EXPECTATION VALUE; INFLATIONARY UNIVERSE; PARTICLE PRODUCTION; PHASE TRANSFORMATIONS; SYMMETRY; U-1 GROUPS

Citation Formats

Delepine, David, Martinez, Carlos, and Urena-Lopez, L. Arturo. Complex Hybrid Inflation and Baryogenesis. United States: N. p., 2007. Web. doi:10.1103/PHYSREVLETT.98.161302.
Delepine, David, Martinez, Carlos, & Urena-Lopez, L. Arturo. Complex Hybrid Inflation and Baryogenesis. United States. doi:10.1103/PHYSREVLETT.98.161302.
Delepine, David, Martinez, Carlos, and Urena-Lopez, L. Arturo. Fri . "Complex Hybrid Inflation and Baryogenesis". United States. doi:10.1103/PHYSREVLETT.98.161302.
@article{osti_20951247,
title = {Complex Hybrid Inflation and Baryogenesis},
author = {Delepine, David and Martinez, Carlos and Urena-Lopez, L. Arturo},
abstractNote = {We propose a hybrid inflation model with a complex waterfall field which contains an interaction term that breaks the U(1) global symmetry associated with the waterfall field charge. We show that the asymmetric evolution of the real and imaginary parts of the complex field during the phase transition at the end of inflation translates into a charge asymmetry. The latter strongly depends on the vacuum expectation value of the waterfall field, which is well constrained by diverse cosmological observations.},
doi = {10.1103/PHYSREVLETT.98.161302},
journal = {Physical Review Letters},
number = 16,
volume = 98,
place = {United States},
year = {Fri Apr 20 00:00:00 EDT 2007},
month = {Fri Apr 20 00:00:00 EDT 2007}
}
  • We propose a hybrid inflation model with a complex waterfall field which contains an interaction term that breaks the U (1) global symmetry associated to the waterfall field charge. We show that the asymmetric evolution of the real and imaginary parts of the complex field during the phase transition at the end of inflation translates into a charge asymmetry. The latter strongly depends on the vev of the waterfall field, which is well constrained by diverse cosmological observations.
  • We propose a hybrid inflation model with a complex waterfall field which contains an interaction term that breaks the U(1) global symmetry associated to the waterfall field charge. The asymmetric evolution of the real and imaginary parts of the complex field during the phase transition at the end of inflation translates into a charge asymmetry.
  • We consider the construction of inverted hybrid inflation models in which the vacuum energy during inflation is on the TeV scale, and the inflaton couples to the Higgs field. Such models are of interest in the context at some recently proposed models of electroweak baryogenesis. We demonstrate how constraints on these models arise from quantum corrections, and how self-consistent examples may be constructed, albeit at the expense of fine tuning. We discuss two possible ways in which the baryon asymmetry of the universe may be produced in these models. One of them is based on preheating and a consequent nonthermalmore » electroweak symmetry restoration, and the other on the formation of Higgs winding configurations by the Kibble mechanism at the end of inflation.« less
  • We calculate the baryon asymmetry created by the decay of a pseudo Nambu-Goldstone boson (PNGB) whose interactions violate baryon number conservation. Our results are in disagreement with previous results in the original spontaneous baryogenesis models for the asymmetry produced by the decay of an oscillating scalar field with B-number-violating derivative couplings; we find that the net baryon number density is proportional to {theta}{sub i}{sup 3}, where {theta}{sub i} is the amplitude of the PNGB field in natural inflation at the onset of reheating. While our calculation of the asymmetry is carried out in the context of natural inflation our approachmore » is generally valid for baryogenesis models using decaying classical fields. We include a complete derivation of the number density of particles produced by the decay of a classical scalar field. {copyright} {ital 1997} {ital The American Physical Society}« less
  • We consider baryogenesis occurring during the thermalization stage at the end of extended inflation. In extended inflation, the Universe passes through a first-order phase transition via bubble nucleation; inflation comes to an end when bubbles collide and their collisions convert energy stored in the bubble walls into particles. This naturally provides conditions well out of thermal equilibrium in which baryon-number-violating processes may proceed; we estimate the amount of baryon asymmetry which may be produced this way. The avoidance of a monopole or domain-wall problem can also be ensured and isothermal density perturbations may arise as a remnant of spatial variationmore » in the baryon asymmetry.« less