C-parity, magnetic monopoles and higher frequency gravitational waves - INSPIRE

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C-parity, magnetic monopoles and higher frequency gravitational waves

Rinku Maji
(
- IBS, Daejeon
)
,
Qaisar Shafi
(
- Delaware U., Bartol Inst. and
- Delaware U.
)

Feb 14, 2025

15 pages

e-Print:

2502.10135 [hep-ph]

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Abstract: (arXiv)

We consider the spontaneous breaking of

SO(10)

grand unified symmetry to the left-right symmetric model

SU(3)_c \times SU(3)_L \times SU(2)_R \times U(1)_{B-L}

with C-parity also unbroken [

C

converts

Q\to -Q

, where

Q

is the electric charge operator in

SO(10)

.] This breaking produces the topologically stable GUT monopole as well as a GUT scale C-string. The subsequent breaking at an intermediate scale of C-parity produces domain walls bounded by C-strings, found by Kibble, Lazarides and Shafi. A limited number of inflationary

e

-foldings experienced during these breakings can yield an observable number density of primordial GUT monopoles. The C-strings also experience this inflationary phase, and the subsequent string-wall network decays through the emission of gravitational waves. We estimate the gravitational wave spectrum from these composite structures over a range of values of the domain wall tension

\sigma

. Depending on

\sigma

the spectrum displays a peak in the higher frequency range between

10^2

to

10^5

Hz.

Note:

15 pages, 3 captioned figures

References(77)

Figures(3)

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