Zobrazeno 1 - 10
of 80
pro vyhledávání: '"J E, Marsh"'
Publikováno v:
Journal of High Energy Physics, Vol 2024, Iss 2, Pp 1-37 (2024)
Abstract Scalar dark matter (DM), and axions in particular, have an irreducible abundance of particles produced by freeze-in due to portal interactions with the Standard Model plasma in the early Universe. In addition, vacuum misalignment and other m
Externí odkaz:
https://doaj.org/article/64840a90aba0489fadf90e7b1a2da23a
Autor:
Peter Athron, Csaba Balázs, Ankit Beniwal, J. Eliel Camargo-Molina, Andrew Fowlie, Tomás E. Gonzalo, Sebastian Hoof, Felix Kahlhoefer, David J. E. Marsh, Markus Tobias Prim, Andre Scaffidi, Pat Scott, Wei Su, Martin White, Lei Wu, Yang Zhang
Publikováno v:
Journal of High Energy Physics, Vol 2021, Iss 5, Pp 1-40 (2021)
Abstract The excess of electron recoil events seen by the XENON1T experiment has been interpreted as a potential signal of axion-like particles (ALPs), either produced in the Sun, or constituting part of the dark matter halo of the Milky Way. It has
Externí odkaz:
https://doaj.org/article/84b27cf55add43a5882a70d1c600d420
Autor:
David J. E. Marsh, Wen Yin
Publikováno v:
Journal of High Energy Physics, Vol 2021, Iss 1, Pp 1-30 (2021)
Abstract An axion-like particle (ALP) with mass m ϕ ∼ 10 −15 eV oscillates with frequency ∼1 Hz. This mass scale lies in an open window of astrophysical constraints, and appears naturally as a consequence of grand unification (GUT) in string/M
Externí odkaz:
https://doaj.org/article/a9607ce8a5bd4792ae82dc68031ad8cd
Publikováno v:
The Open Journal of Astrophysics, Vol 5 (2022)
We review results from QCD axion string and domain wall simulations and propagate the associated uncertainties into the calculation of the axion relic density. We compare two different sets of studies and, using cosmological constraints, perform stat
Externí odkaz:
https://doaj.org/article/2ceecad2f91d4029aa0661f5bdd6b37b
Autor:
Jondalar L. J. Kuß, David J. E. Marsh
Publikováno v:
The Open Journal of Astrophysics, Vol 4 (2021)
We apply the squeezed state formalism to scalar field dark matter (e.g. axion) perturbations generated during inflation. As for the inflationary perturbations, the scalar field state becomes highly squeezed as modes exit the horizon. For as long as $
Externí odkaz:
https://doaj.org/article/6fd37f8b54ee460ca05134db8e46a838
Autor:
David J. E. Marsh
Publikováno v:
Annalen der Physik.
I demonstrate a simple example of how the time series obtained from searches for ultralight bosonic dark matter (DM), such as the axion, can be used to determine whether it is in a coherent or incoherent quantum state. The example is essentially triv
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8be1d97bb26adf6261815073508c54ea
https://doi.org/10.1002/andp.202200609
https://doi.org/10.1002/andp.202200609
Publikováno v:
Physical Review
In the presence of a background magnetic field, axion dark matter induces an electric field and can thus excite phonon-polaritons in suitable materials. We revisit the calculation of the axion-photon conversion power output from such materials, accou
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::43f9d44d198d2624785b3f360cf821fe
https://doi.org/10.1103/physrevd.107.035036
https://doi.org/10.1103/physrevd.107.035036
Dilatons (and moduli) couple to the masses and coupling constants of ordinary matter, and these quantities are fixed by the local value of the dilaton field. If, in addition, the dilaton with mass $m_\phi$ contributes to the cosmic dark matter densit
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5c61d74f92d749ab1543dc5f3960edf9
http://arxiv.org/abs/2210.03705
http://arxiv.org/abs/2210.03705
Publikováno v:
Physical Review D. 106
Ultra-light axions (ULAs) are a promising and intriguing set of dark-matter candidates. We study the prospects to use forthcoming measurements of 21-cm fluctuations from cosmic dawn to probe ULAs. We focus in particular on the velocity acoustic oscil
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f2de6d5a44cc331c9ca408df2f878b4d
https://doi.org/10.1103/physrevd.106.043529
https://doi.org/10.1103/physrevd.106.043529
Publikováno v:
Physical Review D. 106
In this paper, we study the Bose-Einstein condensation of a scalar field with an attractive self-interaction, with or without gravitational interactions. We confirm through full dynamical simulation that the condensation timescale due to self-interac
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::56608d45e4382c7c47e36a00e1e1854b
https://doi.org/10.1103/physrevd.106.023009
https://doi.org/10.1103/physrevd.106.023009