Zobrazeno 1 - 10
of 39
pro vyhledávání: '"Mohammad Hossein Namjoo"'
Publikováno v:
Physics Letters B, Vol 834, Iss , Pp 137400- (2022)
In recent years it has been noted that the perturbative treatment of the statistics of fluctuations may fail to make correct predictions for the abundance of primordial black holes (PBHs). Moreover, it has been shown in some explicit single-field exa
Externí odkaz:
https://doaj.org/article/5274699f0d444f30bf84d231d1089226
Publikováno v:
Journal of High Energy Physics, Vol 2021, Iss 9, Pp 1-38 (2021)
Abstract Massive scalar fields provide excellent dark matter candidates, whose dynamics are often explored analytically and numerically using nonrelativistic Schrödinger-Poisson (SP) equations in a cosmological context. In this paper, starting from
Externí odkaz:
https://doaj.org/article/ad02440137bd4632a26839988a272829
Publikováno v:
Journal of High Energy Physics, Vol 2020, Iss 7, Pp 1-49 (2020)
Abstract A massive, nonrelativistic scalar field in an expanding spacetime is usually approximated by a pressureless perfect fluid, which leads to the standard conclusion that such a field can play the role of cold dark matter. In this paper, we syst
Externí odkaz:
https://doaj.org/article/456f1aede0e3461d80acf4a3a16174db
Publikováno v:
Journal of High Energy Physics, Vol 2019, Iss 3, Pp 1-66 (2019)
Abstract We examine the possible indirect signatures of dark matter annihilation processes with a non-standard scaling with the dark matter density, and in particular the case where more than two dark matter particles participate in the annihilation
Externí odkaz:
https://doaj.org/article/5682094106ca4c3197745dfc40c1f9c3
Autor:
Xingang Chen, Mohammad Hossein Namjoo
Publikováno v:
Physics Letters B, Vol 739, Iss , Pp 285-292 (2014)
Standard Clocks in the primordial epoch leave a special type of features in the primordial perturbations, which can be used to directly measure the scale factor of the primordial universe as a function of time a(t), thus discriminating between inflat
Externí odkaz:
https://doaj.org/article/69ebd4596983475faba9ff6db3dbd775
Publikováno v:
Erkenntnis.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::82cbabfdc4067c6d370de7826a7f53f0
https://doi.org/10.1007/s10670-022-00622-x
https://doi.org/10.1007/s10670-022-00622-x
We study a model of two-field ultra-slow-roll (USR) inflation bounded by a curve in the field space. Curvature perturbations and non-Gaussianities can be enhanced both during the USR phase and from the inhomogeneities at the boundary. We employ the f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2232f8fb758e4d1a1b308729349c8153
http://arxiv.org/abs/2201.07258
http://arxiv.org/abs/2201.07258
Publikováno v:
Journal of High Energy Physics
Journal of High Energy Physics, Vol 2021, Iss 9, Pp 1-38 (2021)
Journal of High Energy Physics, Vol 2021, Iss 9, Pp 1-38 (2021)
Massive scalar fields provide excellent dark matter candidates, whose dynamics are often explored analytically and numerically using nonrelativistic Schr\"{o}dinger-Poisson (SP) equations in a cosmological context. In this paper, starting from the no
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::323d07ee7654157a26f2fa71e899f8f9
http://arxiv.org/abs/2104.10128
http://arxiv.org/abs/2104.10128
Publikováno v:
Physics Letters
In recent years it has been noted that the perturbative treatment of the statistics of fluctuations may fail to make correct predictions for the abundance of primordial black holes (PBHs). Moreover, it has been shown in some explicit single-field exa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6f4b78698ab52a38abe57cebc1b433f8
Publikováno v:
Journal of High Energy Physics, Vol 2020, Iss 7, Pp 1-49 (2020)
Journal of High Energy Physics
Journal of High Energy Physics
A massive, nonrelativistic scalar field in an expanding spacetime is usually approximated by a pressureless perfect fluid, which leads to the standard conclusion that such a field can play the role of cold dark matter. In this paper, we systematicall
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c49bf5017e66d180bef195816c554404