Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
2006-11-02
Phys.Rev.D75:054501,2007
Physics
High Energy Physics
High Energy Physics - Lattice
21 pages, 2 figures, 2 tables. Version to be published in PRD. Improved discussion in Sec. III B. Added references
Scientific paper
10.1103/PhysRevD.75.054501
Unphysical effects associated with finite lattice spacing and partial quenching may lead to the presence of unphysical terms in chiral extrapolation formulae. These unphysical terms must then be removed during data analysis before physical predictions can be made. In this work, we show that through next-to-leading order, there are no unphysical counterterms in the extrapolation formulae, expressed in lattice-physical parameters, for meson scattering lengths in theories with Ginsparg-Wilson valence quarks. Our work applies to most sea quark discretization, provided that chiral perturbation theory is a valid approximation. We demonstrate our results with explicit computations and show that, in favorable circumstances, the extrapolation formulae do not depend on the unknown constant C_Mix appearing at lowest order in the mixed action chiral Lagrangian. We show that the I=1 KK scattering length does not depend on C_Mix in contrast to the I=3/2 K-pi scattering length. In addition, we show that these observables combined with f_K / f_pi and the I=2 pi-pi scattering length share only two linearly independent sets of counterterms, providing a means to test the mixed action theory at one lattice spacing. We therefore make a prediction for the I=1 KK scattering length.
Chen Jiunn-Wei
O'Connell Donal
Walker-Loud Andre
No associations
LandOfFree
Two Meson Systems with Ginsparg-Wilson Valence Quarks does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Two Meson Systems with Ginsparg-Wilson Valence Quarks, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Two Meson Systems with Ginsparg-Wilson Valence Quarks will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-291967