Primordial Monopoles and Strings, Inflation, and Gravity Waves - INSPIRE

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Primordial Monopoles and Strings, Inflation, and Gravity Waves

Nov 3, 2020

38 pages

Published in:

JHEP 02 (2021) 114

Published: Feb 15, 2021

e-Print:

2011.01838 [hep-ph]

DOI:

10.1007/JHEP02(2021)114

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Abstract: (Springer)

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 Gμ spans the range 10

^{−6}

− 10

^{−30}

, where G is Newton’s constant and μ is the string tension. We show how intermediate scale monopoles with mass ∼ 10

^{13}

− 10

^{14}

GeV and flux ≲ 2.8 × 10

^{−16}

cm

^{−2}

s

^{−1}

sr

^{−1}

, and cosmic strings with Gμ ∼ 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.

Note:

38 pages, 9 figures, Published version

GUT
Cosmology of Theories beyond the SM
Gauge Symmetry
Spontaneous Symmetry Breaking
coupling constant: hierarchy
p: decay
inflation
cosmic string
grand unified theory: SO(10)
symmetry breaking

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