Approximating chiral SU(3) amplitudes
- Autor(en)
- Gerhard Ecker, Pere Masjuan, Helmut Neufeld
- Abstrakt
We construct large-N
c motivated approximate chiral SU(3) amplitudes of next-to-next-to-leading order. The amplitudes are independent of the renormalisation scale. Fitting lattice data with those amplitudes allows for the extraction of chiral coupling constants with the correct scale dependence. The differences between approximate and full amplitudes are required to be at most of the order of N
3LO contributions numerically. Applying the approximate expressions to recent lattice data for meson decay constants, we determine several chiral couplings with good precision. In particular, we obtain a value for F
0, the meson decay constant in the chiral SU(3) limit, that is more precise than all presently available determinations.
- Organisation(en)
- Teilchenphysik
- Externe Organisation(en)
- Johannes Gutenberg-Universität Mainz
- Journal
- European Physical Journal C
- Band
- 74
- Seiten
- 1-12
- Anzahl der Seiten
- 12
- ISSN
- 1434-6044
- DOI
- https://doi.org/10.1140/epjc/s10052-014-2748-z
- Publikationsdatum
- 02-2014
- Peer-reviewed
- Ja
- ÖFOS 2012
- 103034 Teilchenphysik
- ASJC Scopus Sachgebiete
- Engineering (miscellaneous), Physics and Astronomy (miscellaneous)
- Link zum Portal
- https://ucris.univie.ac.at/portal/de/publications/approximating-chiral-su3-amplitudes(85a9a808-2cfd-4edc-b651-2f557ba6f807).html