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(Seminar)Covariant chiral perturbation theory: recent applications to one-baryon sector and heavy-light systems |
2018-01-04
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CAS Key Laboratory of Theoretical Physics | Institute of Theoretical Physics | Chinese Academy of Sciences | Seminar | Title 题目 | Covariant chiral perturbation theory: recent applications to one-baryon sector and heavy-light systems | Speaker 报告人 | 姚德良 博士 | Affiliation 所在单位 | IFIC, Valencia, Spain | Date 日期 | 2018年1月4日(周四)下午14:30 | Venue 地点 | ITP conference room322 | Abstract 摘要 | I first give a brief review of covariant chiral perturbation theory (ChPT): the main issue - various solutions and relation to other popular methods like lattice QCD. Then a covariant baryon ChPT with explicit delta degrees of freedom will be applied to study elastic pion-nucleon scattering up to the leading one-loop order. Phase shifts given by the recent analysis of Roy-Steiner equations are well described and the involved low-energy constants are determined. Application of covariant ChPT to a heavy-light system, in particular, interactions between charmed D mesons and Goldstone bosons will be also discussed. In combination with unitarization approach proposed in previous literature we calculate the S-wave scattering lengths and compare them to the ones of lattice QCD. In the end, I conclude with some considerations on what possible new knowledge can be gained using covariant ChPT. | Contact person 所内联系人 | 郭奉坤 |
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