S- and D-wave phase shifts in isospin-2 ππ scattering from lattice QCD

被引：154

作者：

Dudek, Jozef J. ^{[1
,2
]}

Edwards, Robert G. ^{[1
]}

Thomas, Christopher E. ^{[3
]}

机构：

[1] Jefferson Lab, Newport News, VA 23606 USA

[2] Old Dominion Univ, Dept Phys, Norfolk, VA 23529 USA

[3] Trinity Coll Dublin, Sch Math, Dublin 2, Ireland

来源：

PHYSICAL REVIEW D | 2012年 / 86卷 / 03期

关键词：

SYSTEM;

D O I：

10.1103/PhysRevD.86.034031

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The isospin-2 pi pi system provides a useful testing ground for determining elastic hadron scattering parameters from finite-volume spectra obtained using lattice QCD computations. A reliable determination of the excited state spectrum of two pions in a cubic box follows from variational analysis of correlator matrices constructed using a large basis of operators. A general operator construction is presented which respects the symmetries of a multihadron system in flight. This is applied to the case of pi pi and allows for the determination of the scattering phase shifts at a large number of kinematic points, in both S-wave and D-wave, within the elastic region. The technique is demonstrated with a calculation at a pion mass of 396 MeV, where the elastic scattering is found to be well described by a scattering length parametrization.

引用

页数：31

共 43 条

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