Primordial monopoles and strings, inflation, and gravity waves

Chakrabortty, Joydeep; Lazarides, George; Maji, Rinku; Shafi, Qaisar

doi:10.1007/jhep02(2021)114

Primordial monopoles and strings, inflation, and gravity waves

Journal Article · Mon Feb 15 00:00:00 EST 2021 · Journal of High Energy Physics (Online)

DOI:https://doi.org/10.1007/jhep02(2021)114· OSTI ID:1998077

^[1]; Lazarides, George ^[2]; ^[3]; Shafi, Qaisar ^[4]

Indian Institute of Technology Kanpur, Uttar Pradesh (India); University of Delaware, Newark, DE
Aristotle University of Thessaloniki (Greece)
Indian Institute of Technology Kanpur, Uttar Pradesh (India)
University of Delaware, Newark, DE (United States)

We consider magnetic monopoles and strings that appear in non-supersymmetric SO(10) and E₆ 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 ~ 10¹³ – 10¹⁴ GeV and flux ≲ 2.8 × 10^–16 cm^–2s^–1sr^–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.

View Accepted Manuscript (DOE)

Research Organization:: University of Delaware, Newark, DE (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

Grant/Contract Number:: SC0013880

OSTI ID:: 1998077

Journal Information:: Journal of High Energy Physics (Online), Journal Name: Journal of High Energy Physics (Online) Journal Issue: 2 Vol. 2021; ISSN 1029-8479

Publisher:: Springer NatureCopyright Statement

Country of Publication:: United States

Language:: English

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