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Title: The gravitational wave spectrum from cosmological B-L breaking

Cosmological B-L breaking is a natural 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 drives hybrid inflation, ending in tachyonic preheating. The decays of heavy B-L Higgs bosons and heavy neutrinos generate entropy, baryon asymmetry and dark matter and also control the reheating temperature. The different phases in the transition from inflation to the radiation dominated phase produce a characteristic spectrum of gravitational waves. We calculate the complete gravitational wave spectrum due to inflation, preheating and cosmic strings, which turns out to have several features. The production of gravitational waves from cosmic strings has large uncertainties, with lower and upper bounds provided by Abelian Higgs strings and Nambu-Goto strings, implying Ω{sub GW}h{sup 2} ∼ 10{sup −13}–10{sup −8}, much larger than the spectral amplitude predicted by inflation. Forthcoming gravitational wave detectors such as eLISA, advanced LIGO, ET, BBO and DECIGO will reach the sensitivity needed to test the predictions from cosmological B-L breaking.
Authors:
; ;  [1] ;  [2]
  1. Deutsches Elektronen-Synchrotron DESY, 22607 Hamburg (Germany)
  2. Kavli IPMU (WPI), University of Tokyo, Kashiwa 277-8583 (Japan)
Publication Date:
OSTI Identifier:
22282656
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Cosmology and Astroparticle Physics; Journal Volume: 2013; Journal Issue: 10; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ASYMMETRY; BARYONS; ENTROPY; GRAND UNIFIED THEORY; GRAVITATIONAL WAVE DETECTORS; GRAVITATIONAL WAVES; HIGGS BOSONS; HIGGS MODEL; INFLATIONARY UNIVERSE; NEUTRINOS; NONLUMINOUS MATTER; STRING MODELS; TACHYONS; UNIVERSE