文章基本信息

标题：I=2 Two-Pion Wave Function with Non-zero Total Momentum
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作者：K. Sasaki
期刊名称：PoS - Proceedings of Science
印刷版ISSN：1824-8039
出版年度：2007
出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：We calculate the two-pion wave function for the I 􀀀 2 S-wave two-pion system with a finite scattering momentum and estimate the interaction range between two pions. It allows us to examine the validity of the necessary condition for the finite-volume method for the scattering phase shift. A calculation is carried out with a plaquette gauge action for gluons and a clover-improvedWilson action for quarks at 1􀀀a 􀀀 163 GeV on 323 􀀀120 lattice in the quenched approximation. We conclude that the necessary condition is satisfied within statistical errors for the lattice size L 32, when the quark mass is in the range m2π 􀀀 01760345 GeV2 and the scattering momentum in k2 0026 GeV2. We also find that the energy dependence of the interaction range is small and it takes 1217 fm for our simulation parameters. We obtain the phase shift from the two-pion wave function with a smaller statistical error than that from the conventional analysis with the two-pion time correlator