Quantum tunneling in the early universe: stable magnetic monopoles from metastable cosmic strings - INSPIRE

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Quantum tunneling in the early universe: stable magnetic monopoles from metastable cosmic strings

George Lazarides
(
- Aristotle U., Thessaloniki
)
,
Rinku Maji
(
- Jeonbuk Natl. U. and
- IBS, Daejeon
)
,
Qaisar Shafi
(
- Delaware U., Bartol Inst. and
- Delaware U.
)

Feb 5, 2024

22 pages

Published in:

JCAP 05 (2024) 128

Published: May 31, 2024

e-Print:

2402.03128 [hep-ph]

DOI:

10.1088/1475-7516/2024/05/128

View in:

ADS Abstract Service

reference search6 citations

Citations per year

Abstract: (IOP)

We present a novel mechanism for producing topologically stable monopoles (TSMs) from the quantum mechanical decay of metastable cosmic strings in the early universe. In an SO(10) model this mechanism yields TSMs that carry two units (4π/e) of Dirac magnetic charge as well as some color magnetic charge which is screened. For a dimensionless string tension parameter Gμ ≈ 10

^{-9}

-10

^{-5}

, the monopoles are superheavy with masses of order 10

^{15}

-10

^{17}

GeV. Monopoles with masses of order 10

^{8}

-10

^{14}

GeV arise from metastable strings for Gμ values from ∼ 10

^{-22}

to 10

^{-10}

. We identify the parameter space for producing these monopoles at an observable level with detectors such as IceCube and KM3NeT. For lower Gμ values the ultra-relativistic monopoles should be detectable at Pierre Auger and ANITA. The stochastic gravitational wave emission arise from metastable strings with Gμ ∼ 10

^{-9}

-10-5 and should be accessible at HLVK and future detectors including the Einstein Telescope and Cosmic Explorer. An E

_{6}

extension based on this framework would yield TSMs from the quantum mechanical decay of metastable strings that carry three units (6π/e) of Dirac magnetic charge.

Note:

22 pages, 6 figures, 1 table, matches version accepted in JCAP

Cosmic strings
domain walls
monopoles
cosmology of theories beyond the SM
gravitational waves / sources
physics of the early universe
charge: magnetic
monopole: stability
gravitational radiation: stochastic
gravitational radiation: emission

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