pi K scattering in full QCD with domain-wall valence quarks
Abstract
We calculate the pi K-+(+) scattering length in fully-dynamical lattice QCD with domain-wall valence quarks on MILC lattices with rooted staggered sea-quarks at a lattice spacing of b=0.125 fm, lattice spatial size of L=2.5 fm and at pion masses of m(pi)similar to 290, 350, 490 and 600 MeV. The lattice data, analyzed at next-to-leading order in chiral perturbation theory, allows an extraction of the full pi K scattering amplitude at threshold. Extrapolating to the physical point gives m(pi)a(3/2)=-0.0574 +/- 0.0016(-0.0058)(+0.0024) and m(pi)a(1/2)=0.1725 +/- 0.0017(-0.0156)(+0.0023) for the I=3/2 and I=1/2 scattering lengths, respectively, where the first error is statistical and the second error is an estimate of the systematic due to truncation of the chiral expansion.
Department
Physics
Publication Date
12-8-2006
Journal Title
Physical Review D
Publisher
AMERICAN PHYSICAL SOCIETY
Digital Object Identifier (DOI)
10.1103/PhysRevD.74.114503
Document Type
Article
Recommended Citation
Beane, Silas R.; Bedaque, Paulo F.; Luu, Thomas C.; Originos, Kostas; Pallante, Elisabetta; Parreno, Assumpta; and Savage, Martin J., "pi K scattering in full QCD with domain-wall valence quarks" (2006). Physical Review D. 117.
https://scholars.unh.edu/physics_facpub/117
Rights
© 2006 The American Physical Society