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题名: Aspects of the low-energy constants in the chiral Lagrangian for charmed mesons
作者: Du, ML ;  Guo, FK ;  Meissner, UG ;  Yao, DL
刊名: PHYSICAL REVIEW D
出版日期: 2016
卷号: 94, 期号:9, 页码:94037
学科分类: Astronomy & Astrophysics; Physics
DOI: http://dx.doi.org/10.1103/PhysRevD.94.094037
通讯作者: Du, ML ;  Meissner, UG (reprint author), Univ Bonn, Helmholtz Inst Strahlen & Kernphys, D-53115 Bonn, Germany. ;  Du, ML ;  Meissner, UG (reprint author), Univ Bonn, Bethe Ctr Theoret Phys, D-53115 Bonn, Germany. ;  Guo, FK (reprint author), Chinese Acad Sci, CAS Key Lab Theoret Phys, Inst Theoret Phys, Zhong Guan Cun East St 55, Beijing 100190, Peoples R China. ;  Meissner, UG ;  Yao, DL (reprint author), Forschungszentrum Julich, Inst Adv Simulat, Inst Kernphys, D-52425 Julich, Germany. ;  Meissner, UG ;  Yao, DL (reprint author), Forschungszentrum Julich, Julich Ctr Hadron Phys, D-52425 Julich, Germany.
文章类型: Article
英文摘要: We investigate the numerical values of the low-energy constants in the chiral effective Lagrangian for the interactions between the charmed mesons and the lightest pseudoscalar mesons, the Goldstone bosons of the spontaneous breaking of chiral symmetry for QCD. This problem is tackled from two sides: estimates using the resonance-exchange model and positivity constraints from the general properties of the S-matrix including analyticity, crossing symmetry, and unitarity. These estimates and constraints are compared with the values determined from fits to lattice data of the scattering lengths. Tensions are found, and possible reasons are discussed. We conclude that more data from lattice calculations and experiments are necessary to fix these constants better. As a byproduct, we also estimate the coupling constant g(DDa2), with a(2) the light tensor meson, via the QCD sum rule approach.
类目[WOS]: Astronomy & Astrophysics ;  Physics, Particles & Fields
关键词[WOS]: QCD SUM-RULES ;  PION-NUCLEON SCATTERING ;  PERTURBATION-THEORY ;  MANDELSTAM REPRESENTATION ;  POSITIVITY CONSTRAINTS ;  N-SCATTERING ;  HEAVY MESONS ;  FORM-FACTORS ;  ONE-LOOP ;  RESONANCES
收录类别: SCI
项目资助者: DFG [DFG TRR 110] ;  NSFC [11621131001] ;  Thousand Talents Plan for Young Professionals ;  CAS Key Research Program of Frontier Sciences [QYZDB-SSW-SYS013] ;  CAS President's International Fellowship Initiative [2015VMA076]
语种: 英语
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/21477
Appears in Collections:理论物理所2016年知识产出_期刊论文

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Recommended Citation:
Du, ML,Guo, FK,Meissner, UG,et al. Aspects of the low-energy constants in the chiral Lagrangian for charmed mesons[J]. PHYSICAL REVIEW D,2016,94(9):94037.
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