Zobrazeno 1 - 10
of 13
pro vyhledávání: '"Upala Mukhopadhyay"'
Publikováno v:
Journal of High Energy Physics, Vol 2021, Iss 5, Pp 1-28 (2021)
Abstract We consider a simple extension of Standard Model by adding two complex singlet scalars with a U(1) symmetry. A discrete Z 2 × Z 2 ′ $$ {\mathcal{Z}}_2\times {\mathcal{Z}}_2^{\prime } $$ symmetry is imposed in the model and the added scala
Externí odkaz:
https://doaj.org/article/edbcbf217dfe4fa28378d04a70ecf391
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 80, Iss 10, Pp 1-10 (2020)
Abstract We consider a dark energy scenario driven by a scalar field $$\phi $$ ϕ with a pseudo-Nambu–Goldstone boson (pNGB) type potential $$V(\phi )=\mu ^4 \left( 1+ \mathrm{cos}(\phi /f) \right) $$ V ( ϕ ) = μ 4 1 + cos ( ϕ / f ) . The pNGB o
Externí odkaz:
https://doaj.org/article/fac47fb5cc3c4486b1412da322d4c02f
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 80, Iss 6, Pp 1-11 (2020)
Abstract Within the framework of modified gravity model namely Slotheon model, inspired by the theory of extra dimensions, we explore the behaviour of Dark Energy and the perturbations thereof. The Dark Energy and matter perturbations equations are t
Externí odkaz:
https://doaj.org/article/a0b77fd6df1b4fa0b8a7a10f98b37124
Publikováno v:
Letters in High Energy Physics, Vol 2021, Iss 1 (2021)
The EDGES experiment related to the observant of brightness temperature \(T_{21}\) of 21cm line arising from ground state of neutral Hydrogen atom, has shown an excess absorption feature ( \(− 500^ {+200}_{ − 500}\) mK) in \(T_{21}\) spectrum cor
Externí odkaz:
https://doaj.org/article/9c5d921bff884acda0f15f3ea80054c8
Publikováno v:
Journal of Cosmology and Astroparticle Physics. 2022:099
The evaporation of Primordial Black Hole (PBH) via Hawking radiation influences the evolution of Inter Galactic Medium by heating up the latter and consequently affects the 21cm signal originated from the neutral Hydrogen atoms. In this work, we have
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ca444119f786d699bc1cd49547a451cd
https://doi.org/10.1088/1475-7516/2022/10/099
https://doi.org/10.1088/1475-7516/2022/10/099
Publikováno v:
Letters in High Energy Physics, Vol 2021, Iss 1 (2021)
The EDGES experiment related to the observant of brightness temperature \(T_{21}\) of 21cm line arising from ground state of neutral Hydrogen atom, has shown an excess absorption feature ( \(− 500^ {+200}_{ − 500}\) mK) in \(T_{21}\) spectrum cor
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::73d7ed68b5b79041dfabad76f8624072
https://doi.org/10.31526/lhep.2021.208
https://doi.org/10.31526/lhep.2021.208
Publikováno v:
Springer Proceedings in Physics ISBN: 9789813344075
We explore the perturbationsn in Dark Energy by taking the Slotheon field model. The Slotheon field model follows from the extra-dimensional DGP (Dvali, Gabadadze, and Porrati) model and based on the Galileon transformation in curved space time. In t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8e7c421f5d56953c645a016223352c44
https://doi.org/10.1007/978-981-33-4408-2_131
https://doi.org/10.1007/978-981-33-4408-2_131
Autor:
Debasish Majumdar, Upala Mukhopadhyay
Publikováno v:
Proceedings of European Physical Society Conference on High Energy Physics — PoS(EPS-HEP2019).
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::08b967f2232ccd015621a3af58ec5cf7
https://doi.org/10.22323/1.364.0063
https://doi.org/10.22323/1.364.0063
Publikováno v:
European Physical Journal
European Physical Journal C: Particles and Fields, Vol 80, Iss 10, Pp 1-10 (2020)
European Physical Journal C: Particles and Fields, Vol 80, Iss 10, Pp 1-10 (2020)
We consider a dark energy scenario driven by a scalar field $\phi$ with a pseudo Nambu Goldstone boson (pNGB) type potential $V(\phi)=\mu^4 \left( 1+ {\rm cos}(\phi/f) \right)$. The pNGB originates out of breaking of spontaneous symmetry at a scale $
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::128b7da005cdf7c17f973191b2cd648e
http://repo.scoap3.org/api
http://repo.scoap3.org/api
The EDGES experiment has observed an excess trough ($-500^{+200}_{-500}$ mK) in the brightness temperature $T_{21}$ of the 21cm absorption line of neutral Hydrogen atom (HI) from the era of cosmic dawn ($z \simeq 17.2$). We consider possible interact
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5015c7d61baa8b4d893f9fef0b35768b
http://arxiv.org/abs/2008.09972
http://arxiv.org/abs/2008.09972