Leptogenesis from gravity waves in models of inflation
TLDR
A new mechanism for creating the observed cosmic matter-antimatter asymmetry which satisfies all three Sakharov conditions from one common thread, gravitational waves is presented.Abstract:
We present a new mechanism for creating the observed cosmic matter-antimatter asymmetry which satisfies all three Sakharov conditions from one common thread, gravitational waves. We generate lepton number through the gravitational anomaly in the lepton number current. The source term comes from elliptically polarized gravity waves that are produced during inflation if the inflaton field contains a CP-odd component. The amount of matter asymmetry generated in our model can be of realistic size for the parameters within the range of some inflationary scenarios and grand unified theories.read more
Citations
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Effective field theory for inflation
TL;DR: In this paper, effective field theory is used to study generic theories of inflation with a single inflaton field and the leading corrections to the R correlation function are found to be purely of the k-inflation type.
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Chern-Simons Modified General Relativity
TL;DR: Chern-Simons modified gravity as discussed by the authors is an effective extension of general relativity that captures leading-order, gravitational parity violation, motivated by anomaly cancellation in particle physics and string theory.
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Gauge fields and inflation
TL;DR: In this paper, the role and consequences of using non-scalar fields in the background during the early universe inflationary period are discussed. But the authors focus mainly on the inflation period, with only a brief discussion on the post inflationary (p)reheating era.
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Detection methods for stochastic gravitational-wave backgrounds: a unified treatment
Joseph D. Romano,Neil J. Cornish +1 more
TL;DR: The article considers both Bayesian and frequentist searches using ground-based and space-based laser interferometers, spacecraft Doppler tracking, and pulsar timing arrays; and it allows for anisotropy, non-Gaussianity, and non-standard polarization states.
References
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First year Wilkinson Microwave Anisotropy Probe (WMAP) observations: Determination of cosmological parameters
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Baryogenesis without grand unification
TL;DR: In this article, a mechanism to generate cosmological baryon number excess without resorting to grand unified theories is proposed, where the lepton number excess originating from Majorana mass terms may transform into the number excess through the unsuppressed baryone number violation of electroweak processes at high temperatures.
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Anomaly cancellations in supersymmetric D=10 gauge theory and superstring theory
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On the Anomalous Electroweak Baryon Number Nonconservation in the Early Universe
TL;DR: In this paper, the authors estimate the rate of anomalous electroweak baryon-number nonconserving processes in the cosmic plasma and find that it exceeds the expansion rate of the universe at T > ( a few ) × 10 2 GeV.
Book
Cosmological Inflation and Large-Scale Structure
Andrew R. Liddle,David H. Lyth +1 more
TL;DR: This textbook is the first to provide a modern and unified overview of inflationary cosmology and carefully compares predictions with the latest observations, including those of the cosmic microwave background, the clustering and velocities of galaxies and the epoch of structure formation.