Zobrazeno 1 - 10
of 241
pro vyhledávání: '"Katherine Freese"'
Publikováno v:
The Astrophysical Journal, Vol 965, Iss 2, p 121 (2024)
Supermassive dark stars (SMDS) are luminous stellar objects formed in the early Universe at redshift z ∼ 10–20, made primarily of hydrogen and helium, yet powered by dark matter. We examine the capabilities of the Roman Space Telescope (RST), and
Externí odkaz:
https://doaj.org/article/7f5d5311c3e7476c82e608271f09e366
Publikováno v:
Physics Letters B, Vol 829, Iss , Pp 137081- (2022)
In Chain Inflation the universe tunnels along a series of false vacua of ever-decreasing energy. The main goal of this paper is to embed Chain Inflation in high energy fundamental physics. We begin by illustrating a simple effective formalism for cal
Externí odkaz:
https://doaj.org/article/dbf5260c108d4cfeb678b06bf6b444d7
Publikováno v:
Journal of High Energy Physics, Vol 2020, Iss 10, Pp 1-24 (2020)
Abstract In light of the improved sensitivities of cosmological observations, we examine the status of quasi-degenerate neutrino mass scenarios. Within the simplest extension of the standard cosmological model with massive neutrinos, we find that qua
Externí odkaz:
https://doaj.org/article/e00b16f157664567a40173b860fc2c34
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 80, Iss 7, Pp 1-7 (2020)
Abstract A significant fraction of cosmological dark matter can be formed by very dense macroscopic objects, for example primordial black holes. Gravitational waves offer a promising way to probe these kinds of dark-matter candidates, in a parameter
Externí odkaz:
https://doaj.org/article/ee3b5ed9719d4f89aea09e9f63b11742
Autor:
Florian Kühnel, Katherine Freese
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 79, Iss 11, Pp 1-5 (2019)
Abstract The effect of large quantum fluctuations on primordial black-hole formation for inflationary models with a quasi-inflection point is investigated. By using techniques of stochastic inflation in combination with replica field theory and the F
Externí odkaz:
https://doaj.org/article/59b291770131438e8243f87a5c2af3bc
Publikováno v:
Journal of High Energy Physics, Vol 2019, Iss 4, Pp 1-51 (2019)
Abstract The Next-to-Minimal Supersymmetric Standard Model (NMSSM), the singlet extension of the MSSM which fixes many of the MSSM’s shortcomings, is shown to be within reach of the upcoming runs of the Large Hadron Collider (LHC). A systematic tre
Externí odkaz:
https://doaj.org/article/dc4bb1dc83b04efba87399010e6396b6
Publikováno v:
Physics Letters B, Vol 789, Iss , Pp 262-269 (2019)
Recently, the DAMA/LIBRA collaboration released updated results from their search for the annual modulation signal from Dark Matter (DM) scattering in the detector. Besides approximately doubling the exposure of the DAMA/LIBRA data set, the updated p
Externí odkaz:
https://doaj.org/article/5cff527b377a40b0bba8cb5b8a9a2729
Autor:
Rouzbeh Allahverdi, Mustafa A. Amin, Asher Berlin, Nicolas Bernal, Christian T. Byrnes, M. Sten Delos, Adrienne L. Erickcek, Miguel Escudero, Daniel G. Figueroa, Katherine Freese, Tomohiro Harada, Dan Hooper, David I. Kaiser, Tanvi Karwal, Kazunori Kohri, Gordan Krnjaic, Marek Lewicki, Kaloian D, Lozanov, Vivian Poulin, Kuver Sinha, Tristan L. Smith, Tomo Takahashi, Tommi Tenkanen, James Unwin, Ville Vaskonen, Scott Watson
Publikováno v:
The Open Journal of Astrophysics, Vol 4 (2021)
It is commonly assumed that the energy density of the Universe was dominated by radiation between reheating after inflation and the onset of matter domination 54,000 years later. While the abundance of light elements indicates that the Universe was r
Externí odkaz:
https://doaj.org/article/b4edf11253f44859a7be9f9b08edee66
Publikováno v:
Physics Letters B, Vol 803, Iss , Pp - (2020)
A large experimental program is underway to extend the sensitivity of direct detection experiments, searching for interaction of Dark Matter with nuclei, down to the neutrino floor. However, such experiments are becoming increasingly difficult and co
Externí odkaz:
https://doaj.org/article/56b7d17d11ff41ad82516d5baa36fc6d
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 78, Iss 3, Pp 1-9 (2018)
Abstract If dark matter is composed of weakly interacting particles, Earth’s orbital motion may induce a small annual variation in the rate at which these particles interact in a terrestrial detector. The DAMA collaboration has identified at a $$9.
Externí odkaz:
https://doaj.org/article/ab5f1e3e38024a17b6b75a51e2fcec11