2024
DOI: 10.1088/1475-7516/2024/10/007
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Explaining PTA results by metastable cosmic strings from SO(10) GUT

Stefan Antusch,
Kevin Hinze,
Shaikh Saad

Abstract: In a recent paper ( Phys. Rev. D 108 (2023) 095053), we have demonstrated that the 2023 PTA results, which hint at a stochastic gravitational wave (GW) background at nanohertz frequencies, point towards a promising model-building route for realizing SO(10) Grand Unification with embedded inflation. The proposed supersymmetric scenario solves the doublet-triplet splitting without fine-tuning, accounts for charged fermion and neutrino masses, avoids conflicts with current proton decay bound… Show more

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