✦ LIBER ✦
K+ → π+π0 decays at next-to-leading order in the chiral expansion on finite volumes
✍ Scribed by C.-J.D. Lin; G. Martinelli; E. Pallante; C.T. Sachrajda; G. Villadoro
- Publisher
- Elsevier Science
- Year
- 2003
- Tongue
- English
- Weight
- 115 KB
- Volume
- 119
- Category
- Article
- ISSN
- 0920-5632
No coin nor oath required. For personal study only.
✦ Synopsis
We present the ingredients for determining Kf --t 7r+7r" matrix elements via the combination of lattice QCD and chiral perturbation theory (xPT). By simulating these matrix elements at unphysical kinematics, it is possible to determine all the low-energy constants (LECs) for constructing the physical Kf + 7r+r" amplitudes at nextto-leading order (NLO) in the chiral expansion. In this work, the one-loop chiral corrections are calculated for arbitrary meson four-momenta, in both xPT and quenched xPT (qxPT), and the finite-volume effects are studied.