Zobrazeno 1 - 10
of 63
pro vyhledávání: '"Anish Ghoshal"'
Autor:
Anish Ghoshal, Abhishek Naskar
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 84, Iss 10, Pp 1-13 (2024)
Abstract We investigate the non-perturbatively generated axion-like particle (ALP) potential, involving fermions in the dark sector that couple to the ALP, in an early universe cosmological inflationary stage with the ALP being a spectator field. The
Externí odkaz:
https://doaj.org/article/af7553a96974434ab59e8fd31df38580
Autor:
Adeela Afzal, Anish Ghoshal
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 84, Iss 9, Pp 1-23 (2024)
Abstract We study the possibility that primordial black holes (PBHs) can be formed from large curvature perturbations generated during the waterfall phase transition due to the effects of one-loop radiative corrections of Yukawa couplings between the
Externí odkaz:
https://doaj.org/article/dc9dd404d19545cea028869e8998b3cb
Publikováno v:
Journal of High Energy Physics, Vol 2024, Iss 8, Pp 1-25 (2024)
Abstract The spontaneous breaking of a U(1) symmetry via an intermediate discrete symmetry may yield a hybrid topological defect of domain walls bounded by cosmic strings. The decay of this defect network leads to a unique gravitational wave signal s
Externí odkaz:
https://doaj.org/article/4c8fe229b07d491c85629571e73cc319
Publikováno v:
Journal of High Energy Physics, Vol 2024, Iss 7, Pp 1-21 (2024)
Abstract We show that observations of primordial gravitational waves of inflationary origin can shed light into the scale of flavor violation in a flavon model which also explains the mass hierarchy of fermions. The energy density stored in oscillati
Externí odkaz:
https://doaj.org/article/b74b8169051d470095a69f666032360f
Publikováno v:
Journal of High Energy Physics, Vol 2024, Iss 6, Pp 1-37 (2024)
Abstract We investigate production of non-thermal dark matter particles and heavy sterile neutrinos from inflaton during the reheating era, which is preceded by a slow-roll inflationary epoch with a quartic potential and non-minimal coupling (ξ) bet
Externí odkaz:
https://doaj.org/article/637bc04bfc35425d9b69573ddb5e37b1
Publikováno v:
Particles, Vol 7, Iss 2, Pp 392-415 (2024)
We derive a Nambu–Jona-Lasinio (NJL) model from a non-local gauge theory and show that it has confining properties at low energies. In particular, we present an extended approach to non-local QCD and a complete revision of the technique of Bender,
Externí odkaz:
https://doaj.org/article/dd1c05bbc02a403c843058399765c66c
Publikováno v:
Journal of High Energy Physics, Vol 2024, Iss 2, Pp 1-22 (2024)
Abstract We investigate how superradiance affects the generation of baryon asymmetry in a universe with rotating primordial black holes, considering a scenario where a scalar boson is coupled to the heavy right-handed neutrinos. We identify the regio
Externí odkaz:
https://doaj.org/article/6b1f2e2907034812a9cfb81bb06ea52b
Publikováno v:
Journal of High Energy Physics, Vol 2024, Iss 1, Pp 1-41 (2024)
Abstract The relic density of Dark Matter (DM) in the freeze-in scenario is highly dependent on the evolution history of the universe and changes significantly in a non-standard (NS) cosmological framework prior to Big Bang Nucleosynthesis (BBN). In
Externí odkaz:
https://doaj.org/article/fc522047263349ca946be0695e3c66ed
Publikováno v:
Journal of High Energy Physics, Vol 2023, Iss 11, Pp 1-25 (2023)
Abstract We present the possibility that the seesaw mechanism and nonthermal leptogenesis can be investigated via primordial non-Gaussianities in the context of a majoron curvaton model. Originating as a massless Nambu-Goldstone boson from the sponta
Externí odkaz:
https://doaj.org/article/e05031c0aa5145fba20801dc5962b663
Publikováno v:
Journal of High Energy Physics, Vol 2023, Iss 11, Pp 1-27 (2023)
Abstract In type I seesaw models, the right-handed neutrinos are typically super-heavy, consistent with the generation of baryon asymmetry via standard leptogenesis. Primordial gravitational waves of cosmological origin provides a new window to probe
Externí odkaz:
https://doaj.org/article/2150baf57d244cc7ae2998621b123106