arXiv subjects

Hao-Ran Chang

Publications and source records attributed to Hao-Ran Chang.

21 records · Page 2Linked to original sources

arXiv2012

Influence of Fermion Velocity Renormalization on Dynamical Mass Generation in QED$_3$

We study dynamical fermion mass generation in (2+1)-dimensional quantum electrodynamics with a gauge field coupling to massless Dirac fermions and non-relativistic scalar bosons. We calculate the fermion velocity renormalization and then examine its influence on dynamical mass generation by using the Dyson-Schwinger equation. It is found that dynamical mass generation takes place even after including the scalar bosons as long as the bosonic compressibility parameter $ξ$ is sufficiently small. In addition, the fermion velocity renormalization enhances the dynamically generated mass.

cond-mat.supr-con↗

arXiv2012

Gravitational Corrections to $Φ^{4}$ Theory with Spontaneously Broken Symmetry

We consider a complex scalar $Φ^4 $ theory with spontaneously broken global U(1) symmetry, minimally coupling to perturbatively quantized Einstein gravity which is treated as an effective theory at the energy well below the Planck scale. Both the lowest order pure real scalar correction and the gravitational correction to the renormalization of the Higgs sector in this model have been investigated. Our results show that the gravitational correction renders the renormalization of the Higgs sector in this model inconsistent while the pure real scalar correction to it leads to a compatible renormalization.

hep-th↗

arXiv2012

One loop integrals reduction

By further examining the symmetry of external momenta and masses in Feynman integrals, we fulfilled the method proposed by Battistel and Dallabona, and showed that recursion relations in this method can be applied to simplify Feynman integrals directly.

hep-ph↗