Zobrazeno 1 - 10
of 10
pro vyhledávání: '"Jeff Kost"'
The Lyman-$\alpha$ absorption spectrum associated with photons traversing the intergalactic medium allows us to probe the linear matter power spectrum down to relatively small distance scales. Finding ways of accurately evaluating Lyman-$\alpha$ cons
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a455ecf9271e580a8673a4e5391728a3
http://arxiv.org/abs/2112.09105
http://arxiv.org/abs/2112.09105
Publikováno v:
Physical Review
Current measurements of Standard Model parameters suggest that the electroweak vacuum is metastable. This metastability has important cosmological implications, because large fluctuations in the Higgs field could trigger vacuum decay in the early uni
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::49ec0d9465d037bf2da5e0b0b0899d4d
http://arxiv.org/abs/2105.06939
http://arxiv.org/abs/2105.06939
Increasing attention has recently focused on non-traditional dark-matter production mechanisms which result in primordial dark-matter velocity distributions with highly non-thermal shapes. In this paper, we undertake an assessment of how the detailed
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7c50921af74719e923c54f4dc4f04d43
Many proposals for physics beyond the Standard Model give rise to a dark sector containing many degrees of freedom. In this work, we explore the cosmological implications of the non-trivial dynamics which may arise within such dark sectors, focusing
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::47ef058b14b527447d7a97d0a95c36d0
Publikováno v:
Physical Review
The viability of a given model for inflation is determined not only by the form of the inflaton potential, but also by the initial inflaton field configuration. In many models, field configurations which are otherwise well-motivated nevertheless fail
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9bf1ac50b71820872b941a5dd37d5c0b
https://doi.org/10.1103/physrevd.100.083516
https://doi.org/10.1103/physrevd.100.083516
Publikováno v:
Proceedings of The 39th International Conference on High Energy Physics — PoS(ICHEP2018).
In this talk, we report on the results of a study [1, 2] of the early-universe cosmology of a Kaluza-Klein (KK) tower of scalar fields in the presence of a mass-generating phase transition, focusing on the time-development of the total tower energy d
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9f40c3d86c2f0e6b14b73120a1221fad
https://doi.org/10.22323/1.340.0140
https://doi.org/10.22323/1.340.0140
Publikováno v:
Physical Review
We show that both the baryon asymmetry of the universe and dark matter (DM) can be accounted for by the dynamics of a single axionlike field. In this scenario, the observed baryon asymmetry is produced through spontaneous baryogenesis---driven by the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::181ad15ed44662dbbbbab02225e65c20
http://arxiv.org/abs/1811.10655
http://arxiv.org/abs/1811.10655
We study the early-universe cosmology of a Kaluza-Klein (KK) tower of scalar fields in the presence of a mass-generating phase transition, focusing on the time-development of the total tower energy density (or relic abundance) as well as its distribu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d878ed0ee767ae1d739a309672b40ae0
http://arxiv.org/abs/1612.08950
http://arxiv.org/abs/1612.08950
Publikováno v:
Physical Review D. 93
Light scalar fields such as axions and string moduli can play an important role in early-universe cosmology. However, many factors can significantly impact their late-time cosmological abundances. For example, in cases where the potentials for these
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ee693134e38197f2d5fdeac5d57aff4d
https://doi.org/10.1103/physrevd.93.043540
https://doi.org/10.1103/physrevd.93.043540
Publikováno v:
AIP Conference Proceedings.
A generic byproduct of many theories beyond the Standard Model is the appearance of light scalar fields known as moduli. These moduli should be copiously produced in the early universe but have dangerously long lifetimes, leading to their excessive d
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::db44134795d84d106c48454beebde3fe
https://doi.org/10.1063/1.4953270
https://doi.org/10.1063/1.4953270