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Chiral Extrapolation of the Strangeness Changing K pi Form Factor
- Source :
- JHEP 1004:001,2010
- Publication Year :
- 2009
-
Abstract
- We perform a chiral extrapolation of lattice data on the scalar K pi form factor and the ratio of the kaon and pion decay constants within Chiral Perturbation Theory to two loops. We determine the value of the scalar form factor at zero momentum transfer, at the Callan-Treiman point and at its soft kaon analog as well as its slope. Results are in good agreement with their determination from experiment using the standard couplings of quarks to the W boson. The slope is however rather large. A study of the convergence of the chiral expansion is also performed.<br />Comment: few minor changes
- Subjects :
- High Energy Physics - Phenomenology
High Energy Physics - Lattice
Subjects
Details
- Database :
- arXiv
- Journal :
- JHEP 1004:001,2010
- Publication Type :
- Report
- Accession number :
- edsarx.0912.3792
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1007/JHEP04(2010)001