Di Xu

activity

20162018

collaborators

4 papers

hep-ph2018

Remarks on the Debye Length and the Topological Susceptibilty in Non-Abelian Gauge Theory

Michael Dine, Di Xu

We study the Debye mass, $m_{D}$ , and the topological susceptibility, $χ$ , at high temperatures in non-abelian gauge theory. Both exhibit, at some order in the perturbation expansion…

hep-th2018

Some Remarks on Anthropic Approaches to the Strong CP Problem

Michael Dine, Laurel Stephenson Haskins, Lorenzo Ubaldi +1

The peculiar value of $θ$ is a challenge to the notion of an anthropic landscape. We briefly review the possibility that a suitable axion might arise from an anthropic requirement…

hep-ph2017

Axions, Instantons, and the Lattice

Michael Dine, Patrick Draper, Laurel Stephenson-Haskins +1

If the QCD axion is a significant component of dark matter, and if the universe was once hotter than a few hundred MeV, the axion relic abundance depends on the function $χ (T)$ , th…

hep-th2016

$θ$ and the $η^{'}$ in Large $N$ Supersymmetric QCD

Michael Dine, Patrick Draper, Laurel Stephenson-Haskins +1

We study the large $N$ $θ$ dependence and the $η^{'}$ potential in supersymmetric QCD with small soft SUSY-breaking terms. Known exact results in SUSY QCD are found to reflect a…

Remarks on the Debye Length and the Topological Susceptibilty in Non-Abelian Gauge Theory

Some Remarks on Anthropic Approaches to the Strong CP Problem

Axions, Instantons, and the Lattice

θ and the η′ in Large N Supersymmetric QCD

$θ$ and the $η^{'}$ in Large $N$ Supersymmetric QCD