Primordial Monopoles and Strings, Inflation, and Gravity Waves

Abstract

We consider magnetic monopoles and strings that appear in non-supersymmetric $SO(10)$ and $E_6$ grand unified models paying attention to gauge coupling unification and proton decay in a variety of symmetry breaking schemes. The dimensionless string tension parameter $G\mu$ spans the range $10^{-6}-10^{-30}$, where $G$ is Newton's constant and $\mu$ is the string tension. We show how intermediate scale monopoles with mass $\sim 10^{13}-10^{14}$ GeV and flux $\lesssim 2.8\times 10^{-16}$ ${\mathrm{cm}}^{-2}{\mathrm{s}}^{-1}{\mathrm{sr}}^{-1}$, and cosmic strings with $G\mu \sim 10^{-11}-10^{-10}$ survive inflation and are present in the universe at an observable level. We estimate the gravity wave spectrum emitted from cosmic strings taking into account inflation driven by a Coleman-Weinberg potential. The tensor-to-scalar ratio $r$ lies between $0.06$ and $0.003$ depending on the details of the inflationary scenario.

38 pages, 9 figures, Published version

References in corpus (10)

• Laser Interferometer Space Antenna
• Science with the space-based interferometer LISA. IV: Probing inflation with gravitational waves
• Stochastic gravitational wave background from smoothed cosmic string loops
• CMB power spectrum contribution from cosmic strings using field-evolution simulations of the Abelian Higgs model
• Fitting CMB data with cosmic strings and inflation
• Search for Proton Decay via $p\to e^{+}{\pi }^0$ and $p\to {\mu }^{+}{\pi }^0$ in 0.31 megaton$\cdot$years exposure of the Super-Kamiokande Water Cherenkov Detector
• CMB polarization power spectra contributions from a network of cosmic strings
• Unification, Proton Decay and Topological Defects in non-SUSY GUTs with Thresholds
• Coleman-Weinberg Potential In Good Agreement With WMAP
• Magnetic Monopoles and Free Fractionally Charged States at Accelerators and in Cosmic Rays

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