期刊
FRONTIERS OF PHYSICS
卷 8, 期 3, 页码 328-348出版社
HIGHER EDUCATION PRESS
DOI: 10.1007/s11467-013-0327-7
关键词
chiral Lagrangians; lattice QCD calculations; baryon resonances; hyperons
资金
- National Natural Science Foundation of China [11005007, 11035007, 11175002]
- New Century Excellent Talents in University Program of Ministry of Education of China [NCET- 10-0029]
Baryon chiral perturbation theory (BChPT), as an effective field theory of low-energy quantum chromodynamics (QCD), has played and is still playing an important role in our understanding of non-perturbative strong-interaction phenomena. In the past two decades, inspired by the rapid progress in lattice QCD simulations and the new experimental campaign to study the strangeness sector of low-energy QCD, many efforts have been made to develop a fully covariant BChPT and to test its validity in all scenarios. These new endeavours have not only deepened our understanding of some long-standing problems, such as the power-counting-breaking problem and the convergence problem, but also resulted in theoretical tools that can be confidently applied to make robust predictions. Particularly, the manifestly covariant BChPT supplemented with the extended-on-mass-shell (EOMS) renormalization scheme has been shown to satisfy all analyticity and symmetry constraints and converge relatively faster compared to its non-relativistic and infrared counterparts. In this article, we provide a brief review of the fully covariant BChPT and its latest applications in the u, d, and s three-flavor sector.
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