| 講師 | Dr. Michael Walker (Chiba Univ.) |
|---|---|
| タイトル | Causal and Perturbative Arguments for Condensate Stability in SU(2) QCD |
| 日時 | 2005年5月6日(金) 14:30-16:00 |
| 場所 | 理学系総合研究棟1号館(理学部1号館) 405号室 |
| 連絡先 | 理学部物理学科素粒子論研究室 セミナー係 住友洋介 |
| 概要 | The dual Meissner effect is a promising candidate for the mechanism of confinement, but it requires the ground state of QCD to be a condensate of chromomagnetic monopoles. Unfortunately it has been convincingly argued that any chromomagnetic ground state is unstable, at least in the two-colour theory. Using the Cho-Faddeev-Niemi decomposition we demonstrate that causality requirements are sufficient to prove that the condensate must stabilise. We then exploit the fact that the imaginary part of the effective action is proportional to g^2 to confirm this result with two independant, pertubative calculations. |
