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- W4386114254 abstract "We construct a realistic supersymmetric model for superheavy metastable cosmic strings (CSs) that can be investigated in the current pulsar timing array (PTA) experiments. We consider shifted $mu$ hybrid inflation in which the symmetry breaking $SU(4)_c times SU(2)_L times U(1)_Rrightarrow SU(3)_ctimes SU(2)_L times U(1)_{B-L}times U(1)_R$ proceeds along an inflationary trajectory such that the topologically unstable primordial monopoles are inflated away. The breaking of $U(1)_{B-L} times U(1)_R rightarrow U(1)_Y$ after inflation ends yields the metastable CSs that generate the stochastic gravitational wave background (SGWB) which is consistent with the current PTA data set. The scalar spectral index $n_s$ and the tensor to scalar ratio $r$ are also compatible with Planck 2018. We briefly discuss both reheating and leptogenesis in this model." @default.
- W4386114254 created "2023-08-24" @default.
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- W4386114254 date "2023-08-22" @default.
- W4386114254 modified "2023-09-27" @default.
- W4386114254 title "Supersymmetric hybrid inflation and metastable cosmic strings in $SU(4)_c times SU(2)_L times U(1)_R$" @default.
- W4386114254 doi "https://doi.org/10.48550/arxiv.2308.11410" @default.
- W4386114254 hasPublicationYear "2023" @default.
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