| 日時: |
2009-01-30 16:00 - 17:00 |
| 場所: |
研究本館３階321室 |
| 会議名: |
Non-Abelian Strings in High Density QCD |
| 連絡先: |
安井繁宏 |
| 講演者: |
新田宗士 氏 (慶応大学) |
| アブストラクト: |
The most fundamental objects in high density color superconductivity (color-flavor locked phase) are the non-Abelian semi-superfluid strings found by Balachandran, Digal and Matsuura some years ago. They are color gauge flux tubes but behave as superfluid vortices in the energetic point of view. We show that these vortices have normalizable orientational zero modes in the internal space, associated with the color-flavor locking symmetry broken in the presence of the strings. We study the interaction between two parallel non-Abelian semi-superfluid strings for general internal orientations to show the universal repulsion.
1) This implies that the previously known superfluid vortices, formed by spontaneously broken U(1)_B, are unstable to decay.
2) Our result proves the stability of color superconductors in the presence of external color gauge fields.
3) If color superconductivity is realized in the core of neutron stars, a lattice of these non-Abelian strings is expected to be realized.
This talk is based on Phys.Rev.D78:045002,2008 [arXiv:0708.4096 [hep-ph]] in collaboration with Eiji Nakano and Taeko Matsuura, and some recent works in preparation. |
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