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Cosmological Implications of SU(2) Gauge Fields
Başlık:
Cosmological Implications of SU(2) Gauge Fields
Yazar:
Devulder, Christopher, author.
ISBN:
9780438009653
Yazar Ek Girişi:
Fiziksel Tanımlama:
1 electronic resource (115 pages)
Genel Not:
Source: Dissertation Abstracts International, Volume: 79-10(E), Section: B.
Advisors: Robert R. Caldwell Committee members: Miles Blencowe; Robert Brandenberger; Marcelo Gleiser.
Özet:
Owing to its success in particle physics, Yang-Mills theory has received a surge of interest in cosmology, where theories of inflation have traditionally relied on scalar fields and their built-in isotropy. The realization that a cosmic triad of vector fields could also yield viable solutions has prompted further research into models based on non-Abelian symmetry groups to describe the expansion history of the Universe. In this work we investigate the cosmological implications of SU(2) gauge fields in the context of inflation and dark energy. When coupled to gravitational waves, gauge fields lead to the emergence of novel dynamics ranging from the modulation of their amplitude to acting like a birefringent medium for primordial gravitational waves. We further show how an axial-gravitational anomaly can arise and lead to a successful model of leptogenesis, thanks to the intrinsic handedness of non-Abelian gauge groups. These mechanisms are studied both in the case of single and multiple SU(2) gauge fields by taking advantage of higher dimensional group embedding. We calculate the effects that these vector gauge fields have on cosmological observables, including the detection of gravitational waves and their polarization pattern on the CMB.
Notlar:
School code: 0059
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Yer Numarası | Demirbaş Numarası | Shelf Location | Lokasyon / Statüsü / İade Tarihi |
---|---|---|---|
XX(681877.1) | 681877-1001 | Proquest E-Tez Koleksiyonu | Arıyor... |
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