Aspects of the low-energy constants in the chiral Lagrangian for charmed mesons

doi:http://dx.doi.org/10.1103/PhysRevD.94.094037

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	Aspects of the low-energy constants in the chiral Lagrangian for charmed mesons
	Du, ML; Guo, FK; Meissner, UG; Yao, DL; Meissner, UG (reprint author), Univ Bonn, Helmholtz Inst Strahlen & Kernphys, D-53115 Bonn, Germany.; 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.; Yao, DL (reprint author), Forschungszentrum Julich, Inst Adv Simulat, Inst Kernphys, D-52425 Julich, Germany.; Yao, DL (reprint author), Forschungszentrum Julich, Julich Ctr Hadron Phys, D-52425 Julich, Germany.
刊名	PHYSICAL REVIEW D
	2016
卷号	94 期号:9 页码:94037
DOI	http://dx.doi.org/10.1103/PhysRevD.94.094037
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.
学科主题	Astronomy & Astrophysics ; Physics
语种	英语
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/21477]
专题	理论物理研究所_理论物理所1978-2010年知识产出
通讯作者	Du, ML; Meissner, UG; Meissner, UG (reprint author), Univ Bonn, Helmholtz Inst Strahlen & Kernphys, D-53115 Bonn, Germany.; 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.; Yao, DL (reprint author), Forschungszentrum Julich, Inst Adv Simulat, Inst Kernphys, D-52425 Julich, Germany.; Yao, DL (reprint author), Forschungszentrum Julich, Julich Ctr Hadron Phys, D-52425 Julich, Germany.
推荐引用方式 GB/T 7714	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.
APA	Du, ML.,Guo, FK.,Meissner, UG.,Yao, DL.,Meissner, UG .,...&Yao, DL .(2016).Aspects of the low-energy constants in the chiral Lagrangian for charmed mesons.PHYSICAL REVIEW D,94(9),94037.
MLA	Du, ML,et al."Aspects of the low-energy constants in the chiral Lagrangian for charmed mesons".PHYSICAL REVIEW D 94.9(2016):94037.