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pro vyhledávání: '"Urban, Kai"'
We explore the impact of highly excited bound states on the evolution of number densities of new physics particles, specifically dark matter, in the early Universe. Focusing on dipole transitions within perturbative, unbroken gauge theories, we devel
Externí odkaz:
http://arxiv.org/abs/2308.01336
The dark matter annihilation cross section can be amplified by orders of magnitude if the annihilation occurs into a narrow resonance, or if the dark-matter particles experience a long-range force before annihilation (Sommerfeld effect). We show that
Externí odkaz:
http://arxiv.org/abs/2209.14343
For the minimal wino and Higgsino benchmark models we provide accurate energy spectra of high-energy photons from TeV scale dark-matter annihilation $\chi\chi\to \gamma+X$ by merging electroweak Sudakov resummation near maximal energy with the electr
Externí odkaz:
http://arxiv.org/abs/2203.01692
Autor:
Urban, Kai
We calculate the one-loop correction to the static potential induced by $\gamma$, $W$ and $Z$-exchange at tree-level for arbitrary heavy standard model multiplets. We find that the result obeys a "Casimir-like" scaling, making the NLO correction to t
Externí odkaz:
http://arxiv.org/abs/2108.07285
Extending previous work, we calculate the electroweak potentials for all co-annihilation channels of wino dark matter at the one-loop order and obtain the wino relic abundance including the Sommerfeld effect at the next-to-leading order (NLO).
C
C
Externí odkaz:
http://arxiv.org/abs/2009.00640
The impact of electroweak Sudakov logarithms on the endpoint of the photon spectrum for wino dark matter annihilation was studied intensively over the last several years. In this work, we extend these results to Higgsino dark matter $\chi_1^0$. We ac
Externí odkaz:
http://arxiv.org/abs/1912.02034
We calculate the SU(2)$\times$U(1) electroweak static potential between a fermionic triplet in the broken phase of the Standard Model in the one-loop order (NLO). The one-loop correction provides the leading non-relativistic correction to the large S
Externí odkaz:
http://arxiv.org/abs/1909.04584
Publikováno v:
In Physics Letters B 10 January 2020 800
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