Gravitational waves from metastable cosmic strings in the Pati-Salam model in light of new pulsar timing array data
A series of pulsar timing arrays (PTAs) recently observed gravitational waves at the
nanohertz frequencies. Motivated by this remarkable result, we present a novel class of Pati …
nanohertz frequencies. Motivated by this remarkable result, we present a novel class of Pati …
Probing stochastic gravitational wave background from SU (5)× U (1) χ strings in light of NANOGrav 15-year data
A realistic model of SU (5)× U (1) χ, embedded in SO (10) supersymmetric grand unified
theory, is investigated for the emergence of a metastable cosmic string network. This …
theory, is investigated for the emergence of a metastable cosmic string network. This …
-hybrid inflation, gravitino dark matter, and stochastic gravitational wave background from cosmic strings
We present a successful realization of supersymmetric μ-hybrid inflation model based on a
gauged U (1) B–L extension of the minimal supersymmetric standard model, with the soft …
gauged U (1) B–L extension of the minimal supersymmetric standard model, with the soft …
Radiative symmetry breaking, cosmic strings and observable gravity waves in 𝖴 (1) 𝖱 symmetric 𝖲𝖴 (5)× 𝖴 (1) χ
We implement shifted hybrid inflation in the framework of supersymmetric SU (5)× U (1) χ
GUT model which provides a natural solution to the monopole problem appearing in the …
GUT model which provides a natural solution to the monopole problem appearing in the …
Seeking de-Sitter Vacua in the String Landscape
GK Leontaris, P Shukla - arXiv preprint arXiv:2303.16689, 2023 - arxiv.org
In this report, we present a concise review on the various moduli stabilisation schemes
proposed in the context of type IIB superstring compactifications using Calabi-Yau …
proposed in the context of type IIB superstring compactifications using Calabi-Yau …
Observable r, gravitino dark matter, and non-thermal leptogenesis in no-scale supergravity
A bstract We analyse the shifted hybrid inflation in a no-scale supersymmetric SU (5) GUT
model which naturally circumvents the monopole problem. The no-scale framework is …
model which naturally circumvents the monopole problem. The no-scale framework is …
Primordial monopoles, black holes and gravitational waves
We show how topologically stable superheavy magnetic monopoles and primordial black
holes can be generated at observable levels by the waterfall field in hybrid inflation models …
holes can be generated at observable levels by the waterfall field in hybrid inflation models …
Gravitational wave production after inflation for a hybrid inflationary model
We discuss a cosmological scenario with a stochastic background of gravitational waves
sourced by the tensor perturbation due to a hybrid inflationary model with cubic potential …
sourced by the tensor perturbation due to a hybrid inflationary model with cubic potential …