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hep-ph2022
Heating up Peccei-Quinn scale
Sabir Ramazanov, Rome Samanta
We discuss production of QCD axion dark matter in a novel scenario, which assumes time-varying scale of Peccei-Quinn symmetry breaking. The latter decreases as the Universe's tempe…
gr-qc2022★ 5 cited
Shrouded black holes in Einstein-Gauss-Bonnet gravity
Eugeny Babichev, William T. Emond, Sabir Ramazanov
We study black holes in a modified gravity scenario involving a scalar field quadratically coupled to the Gauss-Bonnet invariant. The scalar is assumed to be in a spontaneously bro…