Semi-shifted hybrid inflation with B-L cosmic strings
| dc.creator | Lazarides, George | |
| dc.creator | Peddie, Iain N. R. | |
| dc.creator | Vamvasakis, Achilleas | |
| dc.date | 2008-04-23 | |
| dc.date | 2008-07-10 | |
| dc.date.accessioned | 2026-07-07T11:50:08Z | |
| dc.date.available | 2026-07-07T11:50:08Z | |
| dc.description | We discuss a new inflationary scenario which is realized within the extended supersymmetric Pati-Salam model which yields an acceptable b-quark mass for universal boundary conditions and mu>0 by modestly violating Yukawa unification and leads to new shifted, new smooth, or standard-smooth hybrid inflation. Inflation takes place along a "semi-shifted" classically flat direction on which the U(1)_{B-L} gauge group remains unbroken. After the end of inflation, U(1)_{B-L} breaks spontaneously and a network of local cosmic strings, which contribute a small amount to the curvature perturbation, is produced. We show that, in minimal supergravity, this "semi-shifted" inflationary scenario is compatible with a recent fit to data which uses field-theory simulations of a local string network. Taking into account the requirement of gauge unification, we find that, for spectral index n_s=1, the predicted fractional contribution f_{10} of strings to the temperature power spectrum at multipole l=10 is about 0.039. Also, for f_{10}=0.10, which is the best-fit value, we obtain that n_s is about 1.0254. Spectral indices lower than about 0.98 are excluded and blue spectra are slightly favored. Magnetic monopoles are not formed at the end of semi-shifted hybrid inflation. | |
| dc.description | 11 pages including 3 figures, uses Revtex, version to appear in Phys. Rev. D | |
| dc.identifier | https://arxiv.org/abs/0804.3661 | |
| dc.identifier | http://arxiv.org/abs/0804.3661 | |
| dc.identifier | Phys.Rev.D78:043518,2008 | |
| dc.identifier | doi:10.1103/PhysRevD.78.043518 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/203469 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.subject | Astrophysics | |
| dc.title | Semi-shifted hybrid inflation with B-L cosmic strings | |
| dc.type | text |