7 papers
Diagrammatic structures of the Nielsen identity
Yi-Lei Tang
The -function, or the effective potential of a gauge field theory should comply with the Nielsen identity, which implies how the effective potential evolves as we shift the gaug…
Vector dark matter from split SU(2) gauge bosons
Zexi Hu, Chengfeng Cai, Yi-Lei Tang +2
We propose a vector dark matter model with an exotic dark SU(2) gauge group. Two Higgs triplets are introduced to spontaneously break the symmetry. All of the dark gauge bosons bec…
Dark Matter Bound State Formation in Fermionic DM model with Light Dark Photon and Dark Higgs Boson
Pyungwon Ko, Toshinori Matsui, Yi-Lei Tang
If fermionic dark matter (DM) is stabilized by dark gauge symmetry that is spontaneously broken into its subgroup , the particle contents of the model becomes very rich…
Structures of the Massive Vector Boson Propagators at Finite Temperature Illuminated by the Goldstone Equivalence Gauge
Yi-Lei Tang
Inspired by the Goldstone equivalence gauge, we study the thermal corrections to an originally massive vector boson by checking the poles and branch cuts. We find that part of the…
Thermally modified sterile neutrino portal dark matter and gravitational waves from phase transition: The Freeze-in case
Ligong Bian, Yi-Lei Tang
We consider the thermal effects into the evaluation of the dark matter production process. With the assistance of the right handed neutrinos, the freeze-in massive particle dark ma…
Calculations of the Sommerfeld Effect in a Unified Wave Function Framework
Yi-Lei Tang, Gao-Liang Zhou
In this paper, we suggest a method of a complete calculation of the Sommerfeld effect in both the s-wave and p-wave annihilation situations. The basic idea is to uniformly consider…