Zobrazeno 1 - 10
of 62
pro vyhledávání: '"karim ghorbani"'
Autor:
Khadije Rahi Maleki, Karim Ghorbani
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 83, Iss 6, Pp 1-24 (2023)
Abstract We investigate the effect of one loop quantum corrections on the elastic scattering of dark matter off the nucleon in a fermionic dark matter model. The model introduces two new singlet fermions and a singlet scalar. The fermions communicate
Externí odkaz:
https://doaj.org/article/3258e01c384c478b90150b055555c42e
Autor:
Karim Ghorbani, Parsa Ghorbani
Publikováno v:
Iranian Journal of Physics Research, Vol 23, Iss 1, Pp 225-230 (2023)
In this research we introduce a model by adding two singlet scalars to the Higgs potential of the Standard Model and imposing scale symmetry to address the hierarchy problem. The scale symmetry plays a crucial role here. In the classical limit, all t
Externí odkaz:
https://doaj.org/article/0772889c1e294d058e6221261012bae9
Publikováno v:
Physics Letters B, Vol 844, Iss , Pp 138119- (2023)
In this research we consider a U(1)X gauge boson acting as a dark matter candidate. The vector dark matter (DM) gets mass when a complex singlet scalar breaks the gauge symmetry spontaneously, adding a second Higgs boson to the spectra. The dark matt
Externí odkaz:
https://doaj.org/article/7dccaa7c75a04108a8bcece15c353269
Publikováno v:
پژوهشهای علوم دامی ایران, Vol 13, Iss 4, Pp 585-600 (2022)
Introduction One of the most important challenges in poultry industry is supplying of feedstuff. The international prices of this feedstuff have increased the costs of poultry production, and therefore, reduced marketing margins. Additionally, due to
Externí odkaz:
https://doaj.org/article/4860e15093744fb489932a24a5b3abc8
Autor:
Karim Ghorbani, Parsa Ghorbani
Publikováno v:
Nuclear Physics B, Vol 984, Iss , Pp 115980- (2022)
The recently reported measurement of the W-boson mass by CDF-II collaboration is significantly heavier than that of the Standard Model prediction. We study this anomaly in the scale invariant Two-Higgs-Doublet-Model (SI-2HDM) with a Z2 symmetry to av
Externí odkaz:
https://doaj.org/article/7c4635b078c74ce3a8a450003a89492d
Autor:
Bastián Díaz Sáez, Karim Ghorbani
Publikováno v:
Physics Letters B, Vol 823, Iss , Pp 136750- (2021)
We explore a simple model containing two singlet scalars as dark matter candidates and a vector-like lepton. Evading collider and dark matter constraints, the model is able to accommodate the correct dark matter relic abundance and the (g−2)μ anom
Externí odkaz:
https://doaj.org/article/60a31f7def8d48ce9f67af977eed1c96
Autor:
Karim Ghorbani, Parsa Hossein Ghorbani
Publikováno v:
Journal of High Energy Physics, Vol 2019, Iss 12, Pp 1-32 (2019)
Abstract The simplest extension of the Standard Model by only one real singlet scalar can explain the observed dark matter relic density while giving simultaneously a strongly first-order electroweak phase transition in the early universe. However, a
Externí odkaz:
https://doaj.org/article/336dce773bec4ee9b8b1d5ec5c365888
Autor:
Karim Ghorbani, Parsa Hossein Ghorbani
Publikováno v:
Journal of High Energy Physics, Vol 2019, Iss 5, Pp 1-14 (2019)
Abstract We examine a model with a fermionic dark matter candidate having pseudoscalar interaction with the standard model particles where its direct detection elastic scattering cross section at tree level is highly suppressed. We then calculate ana
Externí odkaz:
https://doaj.org/article/bee841cc7b314362af120ccc21570c92
Autor:
Karim Ghorbani
Publikováno v:
Journal of High Energy Physics, Vol 2018, Iss 11, Pp 1-19 (2018)
Abstract We consider a model with two gauge singlet fermionic WIMPs communicating with the SM particles by a singlet scalar mediator via a Higgs portal. While the light WIMP is stable and plays the role of the dark matter (DM) candidate, the heavy pa
Externí odkaz:
https://doaj.org/article/a2e7ab46165d4abaa29c55524276afd1
Autor:
Karim Ghorbani, Parsa Hossein Ghorbani
Publikováno v:
Journal of High Energy Physics, Vol 2018, Iss 5, Pp 1-20 (2018)
Abstract Recently the DArk Matter Particle Explorer (DAMPE) has reported an excess in the electron-positron flux of the cosmic rays which is interpreted as a dark matter particle with the mass about 1.5 TeV. We come up with a leptophilic Z′ scenari
Externí odkaz:
https://doaj.org/article/c10088b4060342aeb39b0bc51721fa98