期刊
PHYSICAL REVIEW D
卷 79, 期 9, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.79.094026
关键词
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资金
- National Natural Science Foundation of China [10775146, 10805048, 10705001, 10625521, 10721063]
- China Postdoctoral Science Foundation [20070420526]
- K. C. Wong Education Foundation
- Fundacao para a Ciencia e a Tecnologia of the Ministerio da Ciencia, Tecnologia e Ensino Superior of Portugal [SFRH/BPD/34819/2007]
- Fundação para a Ciência e a Tecnologia [SFRH/BPD/34819/2007] Funding Source: FCT
We have performed a systematical calculation of the pion (pi, K, eta) and heavy pseudoscalar meson S-wave scattering lengths up to O(p(3)) in the chiral perturbation theory in the heavy quark symmetry limit. With the three scattering lengths from the lattice simulations as input we estimate the unknown low-energy constants. Then we predict all the other unmeasured scattering lengths. The analytical expressions and predictions may be helpful to future investigations. Especially we note that the DK scattering length is positive. Therefore their interaction is attractive, which helps to lower the mass of the bare charm-strange scalar state in the quark model through the couple-channel effect.
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