%0 Journal Article
%T Gravitational waves from walls bounded by strings in SO(10) model of pseudo-Goldstone dark matter
%A Maji, R.
%A Park, W. I.
%A Shafi, Q.
%J Physics Letters B
%D 2023
%V 845
%I Elsevier
%@ 0370-2693
%G English
%F Maji_etal2023
%O WOS:001116786800001
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=5842), last updated on Wed, 20 Dec 2023 13:20:22 +0000
%X We explore the gravitational wave spectrum generated by string-wall structures in an SO (10) (Spin(10)) based scenario of pseudo-Goldstone boson dark matter (pGDM) particle. This dark matter candidate is a linear combination of the Standard Model (SM) singlets present in the 126 and 16 dimensional Higgs fields. The Higgs 126-plet vacuum expectation value (VEV) < 126(H)> leaves unbroken the Z(2) subgroup of Z(4), the center of SO (10). Among other things, this yields topologically stable cosmic strings with a string tension μsimilar to < 126(H)>(2). The subsequent (spontaneous) breaking of Z(2) at a significantly lower scale by the 16-plet VEV < 16(H)> leads to the appearance of domain walls bounded by the strings produced earlier. We display the gravitational wave spectrum for G μvalues varying between 10(-15) and 10(-9) (< 126(H)> similar to 10(11) – 10(14) GeV), and < 16(H)> similar to 0.1 – 10(2) TeV range (G denotes Newton's constant.) These predictions can be tested, as we show, by a variety of (proposed) experiments including LISA, ET, CE and others.
%R 10.1016/j.physletb.2023.138127
%U https://arxiv.org/abs/2305.11775
%U https://doi.org/10.1016/j.physletb.2023.138127
%P 138127-5pp