Primordial Spectrum of Gauge Fields from Inflation
| dc.creator | Davis, Anne-Christine | |
| dc.creator | Dimopoulos, Konstantinos | |
| dc.creator | Prokopec, Tomislav | |
| dc.creator | Tornkvist, Ola | |
| dc.date | 2000-07-14 | |
| dc.date | 2000-07-16 | |
| dc.date.accessioned | 2026-07-07T10:51:16Z | |
| dc.date.available | 2026-07-07T10:51:16Z | |
| dc.description | We show that conformal invariance of gauge fields is naturally broken in inflation, having as a consequence amplification of gauge fields. The resulting spectrum of the field strength is approximately B_L ~ L^(-1), where L is the relevant coherence scale. One realisation of our scenario is scalar electrodynamics with a scalar whose mass is large enough to evade observational constraints - the obvious candidates being supersymmetric partners of the standard-model fermions. Our mechanism also leads naturally to amplification of the standard-model Z-boson field due to its coupling to the electroweak Higgs field. At preheating, the spectrum of the Z field is transferred to the hypercharge field, which remains frozen in the plasma and is converted into a magnetic field at the electroweak phase transition. With a reasonable model of field evolution one obtains a magnetic field strength of the order of $10^{-29}$ Gauss on a scale of 100 pc, the size of the largest turbulent eddy in a virialised galaxy. Resonant amplification in preheating can lead to primordial fields as large as $10^{-24}$ Gauss, consistent with the seed field required for the galactic dynamo mechanism. | |
| dc.description | 14 pages, 3 figures. New improved figures, typos corrected | |
| dc.identifier | https://arxiv.org/abs/astro-ph/0007214 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/0007214 | |
| dc.identifier | Phys.Lett.B501:165-172,2001; Phys.Rev.Focus10:story9,2002 | |
| dc.identifier | doi:10.1016/S0370-2693(01)00138-1 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/184763 | |
| dc.subject | Astrophysics | |
| dc.subject | General Relativity and Quantum Cosmology | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | Primordial Spectrum of Gauge Fields from Inflation | |
| dc.type | text |