Two-photon decay of $π^0$ from two-flavor lattice QCD

Details Two-photon decay of $π^0$ from two-flavor lattice QCD Two-photon decay of $π^0$ from two-flavor lattice QCD

2011-02-27

arxiv.org/abs/1102.5544v2

PoS(Lattice 2010)159

Physics

High Energy Physics

High Energy Physics - Lattice

A contribution to the XXVIII International Symposium on Lattice Field Theory, Lattice2010, June 14-19, 2010, Villasimius, Ital

Scientific paper

We study the correction to the radiative $\pi^0$ decay width due to finite light quark mass. Using lattice QCD with the overlap fermion formulation, we calculate the three-point function of the form $$ in the (Euclidean) momentum space, which corresponds to the $\pi^0\rightarrow \gamma^*\gamma^*$ amplitude. To fit the lattice data, we use two different modifications of vector meson dominance (VMD) ansatz. One is a combined form of VMD with the next-to-leading order (NLO) chiral perturbation theory (ChPT), and the other is a resummed form of pion-loop diagrams. We extract one of the low energy constants in NLO ChPT, and estimate $\pi^0\rightarrow \gamma\gamma$ decay width including finite mass correction.

Affiliated with

Also associated with

No associations

Rating

Two-photon decay of $π^0$ from two-flavor lattice QCD 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-photon decay of $π^0$ from two-flavor lattice QCD, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Two-photon decay of $π^0$ from two-flavor lattice QCD will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-54251