| 講師 | 山本直希 氏(東京大学) |
|---|---|
| タイトル | Instantons and the hadron-quark continuity in dense QCD |
| 日時 | 2008年12月15日(月) 16:15-17:45 |
| 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 | 千葉大学素粒子論研究室 043-290-3908 |
| 概要 | There are three characteristic phases in QCD at finite temperature and density: hadronic phase, quark-gluon plasma phase and color superconducting phase. Recently, we suggested that the interplay between chiral symmetry breaking and color superconductivity induced by the QCD axial anomaly leads to a possibility of a crossover between hadronic and color superconducting phases [1]. After reviewing this result, we demonstrate that this crossover can be dynamically understood from the viewpoint of an interacting instanton ensemble as a four-dimensional generalization of the Berezinskii-Kosterlitz-Thouless transition [2]. Also we discuss the continuity of elementary excitations, such as pseudoscalar mesons and vector mesons, from low to high densities [3]. All these results may imply the continuity of hadron and quark matter in dense QCD. |
| その他 | References: [1] T. Hatsuda, M. Tachibana, N. Yamamoto & G. Baym, Phys. Rev. Lett. 97, 122001 (2006); Phys. Rev. D76, 074001 (2007). [2] N. Yamamoto, arXiv:0810.2293. [3] T. Hatsuda, M. Tachibana &N. Yamamoto, Phys. Rev. D78, 011501 (2008). |
