Zobrazeno 1 - 10
of 222
pro vyhledávání: '"NEE, MICHAEL"'
We study the coupling of axions to gauge bosons in heterotic string theory. The axion-gauge boson couplings in the low energy 4d theory are derived by matching mixed anomalies between higher-form global symmetries and the zero-form gauge symmetry in
Externí odkaz:
http://arxiv.org/abs/2410.03820
We revisit the electroweak phase transition in the scalar singlet extension of the standard model with a $\mathbb{Z}_2$ symmetry. In significant parts of the parameter space the phase transition occurs in two steps - including canonical benchmarks us
Externí odkaz:
http://arxiv.org/abs/2312.06749
Autor:
Nee, Michael
Publikováno v:
Phys. Rev. D 107, 095042 (2023)
We discuss the production of dark matter with mass of order $10$-$100$ TeV and $\mathcal{O}(1)$ couplings to the standard model, a scenario we refer to as the `mesotuned WIMP'. Given the lack of new physics observed at the LHC, indicating we live in
Externí odkaz:
http://arxiv.org/abs/2211.07662
We show that the couplings of axions to gauge bosons are highly restricted in Grand Unified Theories where the standard model is embedded in a simple 4D gauge group. The topological nature of these couplings allows them to be matched from the UV to t
Externí odkaz:
http://arxiv.org/abs/2206.07053
Autor:
Agrawal, Prateek, Nee, Michael
Publikováno v:
SciPost Phys. 13, 049 (2022)
We study false vacuum decays catalysed by magnetic monopoles which act as tunnelling sites with exponentially enhanced decay rates. The field profiles describing the decay do not have the typically assumed $O(3)/O(4)$ symmetry, thus requiring an exte
Externí odkaz:
http://arxiv.org/abs/2202.11102
Autor:
Agrawal, Prateek, Nee, Michael
We study first order phase transitions in Randall-Sundrum models in the early universe dual to confinement in large-$N$ gauge theories. The transition rate to the confined phase is suppressed by a factor $\exp(-N^2)$, and may not complete for $N \gg
Externí odkaz:
http://arxiv.org/abs/2103.05646
Publikováno v:
Phys. Rev. D 99, 015034 (2019)
We consider a model in which baryogenesis occurs at low scale, at a temperature below the electroweak phase transition. This model involves new diquark-type scalars which carry baryon number. Baryon number violation is introduced in the scalar potent
Externí odkaz:
http://arxiv.org/abs/1808.10597
Akademický článek
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Publikováno v:
Brittonia, 2006 Oct 01. 58(4), 322-356.
Externí odkaz:
https://www.jstor.org/stable/4497330
Publikováno v:
Annals of the Missouri Botanical Garden, 2005 May 01. 92(1), 103-112.
Externí odkaz:
https://www.jstor.org/stable/3298650