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pro vyhledávání: '"Dienes, Keith R"'
Stasis is a unique cosmological phenomenon in which the abundances of different energy components in the universe (such as matter, radiation, and vacuum energy) each remain fixed even though they scale differently under cosmological expansion. Moreov
Externí odkaz:
http://arxiv.org/abs/2412.09123
Autor:
Batell, Brian, Dienes, Keith R., Thomas, Brooks, Watson, Scott, Allahverdi, Rouzbeh, Amin, Mustafa, Boddy, Kimberly K., Delos, M. Sten, Erickcek, Adrienne L., Ghalsasi, Akshay, Giblin Jr., John T., Halverson, James, Huang, Fei, Long, Andrew J., Pearce, Lauren, Haghi, Barmak Shams Es, Shelton, Jessie, Shiu, Gary, Sinha, Kuver, Smith, Tristan L.
This document summarizes the discussions which took place during the PITT-PACC Workshop entitled "Non-Standard Cosmological Epochs and Expansion Histories," held in Pittsburgh, Pennsylvania, Sept. 5-7, 2024. Much like the non-standard cosmological ep
Externí odkaz:
http://arxiv.org/abs/2411.04780
It has recently been shown that extended cosmological epochs can exist during which the abundances associated with different energy components remain constant despite cosmological expansion. Indeed, this "stasis" behavior has been found to arise gene
Externí odkaz:
http://arxiv.org/abs/2408.16255
In this paper, we prove a new non-renormalization theorem which arises from UV/IR mixing. This theorem and its corollaries are relevant for all four-dimensional tachyon-free closed string theories which can be realized from higher-dimensional theorie
Externí odkaz:
http://arxiv.org/abs/2407.11160
It has recently been realized that many theories of physics beyond the Standard Model give rise to cosmological histories exhibiting extended epochs of cosmological stasis. During such epochs, the abundances of different energy components such as mat
Externí odkaz:
http://arxiv.org/abs/2406.06830
Many theories of BSM physics predict the existence of large or infinite towers of decaying states. In a previous paper (arXiv:2111.04753) we pointed out that this can give rise to a surprising cosmological phenomenon that we dubbed "stasis" during wh
Externí odkaz:
http://arxiv.org/abs/2309.10345
In most multicomponent dark-matter scenarios, two classes of processes generically contribute to event rates at experiments capable of probing the nature of the dark sector. The first class consists of "diagonal" processes involving only a single spe
Externí odkaz:
http://hdl.handle.net/10150/626467
http://arizona.openrepository.com/arizona/handle/10150/626467
http://arizona.openrepository.com/arizona/handle/10150/626467
Dynamical Dark Matter (DDM) is an alternative framework for dark-matter physics in which the dark sector comprises a vast ensemble of particle species whose Standard-Model decay widths are balanced against their cosmological abundances. In this talk,
Externí odkaz:
http://hdl.handle.net/10150/626503
http://arizona.openrepository.com/arizona/handle/10150/626503
http://arizona.openrepository.com/arizona/handle/10150/626503
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:
http://hdl.handle.net/10150/624934
http://arizona.openrepository.com/arizona/handle/10150/624934
http://arizona.openrepository.com/arizona/handle/10150/624934
Autor:
Boddy, Kimberly K., Dienes, Keith R., Kim, Doojin, Kumar, Jason, Park, Jong-Chul, Thomas, Brooks
Many models currently exist which attempt to interpret the excess of gamma rays emanating from the Galactic Center in terms of annihilating or decaying dark matter. These models typically exhibit a variety of complicated cascade mechanisms for photon
Externí odkaz:
http://hdl.handle.net/10150/623856
http://arizona.openrepository.com/arizona/handle/10150/623856
http://arizona.openrepository.com/arizona/handle/10150/623856