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| Large N_c limit QCD and symmetry preserving truncations for DS and BS equations |
| 2017-09-06
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Institute of Theoretical Physics |
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Chinese Academy of Sciences |
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Key Laboratory of Theoretical Physics |
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Seminar |
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Title
题目 |
Large N_c limit QCD and symmetry preserving truncations for DS and BS equations |
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Speaker
报告人 |
Prof. Qing Wang 王青教授 |
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Affiliation
所在单位 |
Tsinghua Univ. 清华大学
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Date
日期 |
3:30 pm, Wed., Sep. 06, 2017 (9月6日周三） |
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Venue
地点 |
Conference Hall 322, ITP |
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Abstract
摘要 |
Abstract: We develop a framework for deriving Dyson-Schwinger Equations (DSEs) and Bethe-Salpeter Equation (BSE) in QCD at large N_c limit. The starting point is a modified form (with auxiliary fields) of QCD generating functional. This framework provides a natural order by order truncation scheme for DSEs and BSE, and the kernels of the equations up to any order are explicitly given. Chiral symmetry (at chiral limit) is preserved in any order truncation, so it exemplifies the symmetry preserving truncation scheme. It provides a method to study DSEs and BSE beyond the Rainbow-Ladder truncation, and is especially useful to study contributions from non-Abelian dynamics (those arise from gluon self-interactions). We also derive the equation for the quark-ghost scattering kernel, and discuss the Slavnov-Taylor identity connecting the quark-gluon vertex, the quark propagator and the quark-ghost scattering kernel.
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Contact person
所内联系人 |
杨刚 |
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