Kl3 and pion form factors using partially twisted boundary conditions

Details Kl3 and pion form factors using partially twisted boundary conditions Kl3 and pion form factors using partially twisted boundary conditions

2008-12-22

arxiv.org/abs/0812.4265v1

PoS LATTICE2008:287,2008

Physics

High Energy Physics

High Energy Physics - Lattice

7pages, 3 figures, presented at the XXVI International Symposium on Lattice Field Theory, July 14-19, 2008, Williamsburg, Virg

Scientific paper

We compute the Kl3 and pion form factors using partially twisted boundary conditions. The twists are chosen so that the Kl3 form factors are calculated directly at zero momentum transfer (q^2=0), removing the need for a q^2 interpolation, while the pion form factor is determined at values of q^2 close to q^2=0. The simulations are performed on an ensemble of the RBC/UKQCD collaboration's gauge configurations with Domain Wall Fermions and the Iwaski gauge action with an inverse lattice spacing of 1.73(3) GeV. Simulating at a single pion mass of 330 MeV, we find the pion charge radius to be < r^2>_{330 MeV}=0.354(31) fm^2 which, using NLO SU(2) chiral perturbation theory, translates to a value of =0.418(31) fm^2 for a physical pion. For the value of the Kl3 form factor, f_{K\pi}^+(q^2), determined directly at q^2=0, we find a value of f_{K\pi}^+(0)=0.9742(41) at this particular quark mass, which agrees well with our earlier result (0.9774(35)) obtained using the standard, indirect method.

Affiliated with

Also associated with

No associations

Rating

Kl3 and pion form factors using partially twisted boundary conditions 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 Kl3 and pion form factors using partially twisted boundary conditions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Kl3 and pion form factors using partially twisted boundary conditions will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-539547