Conveners
Plenary Session 5
- Sinya Aoki (Yukawa Institute for Theoretical Physics, Kyoto University)
Dr
Jan Friedrich
(Physik-Department E18)
01/07/2015, 08:45
Talk
COMPASS has recently completed the analysis of pion Compton scattering measured via the Primakoff effect. From the first available data set, the pion polarisability is determined with unprecedented precision. It is in agreement with the expectation from chiral perturbation theory, and in tension with the previous dedicated measurements that suggested a value about twice as large. The...
Hidenori Fukaya
(Osaka University)
01/07/2015, 09:25
Talk
In lattice QCD simulations, there is a strong tendency to over-estimate the form factors (and therefore, under-estimate the related charge radii) of pions and other hadrons. In fact, the three major systematic in lattice QCD: finite lattice spacing a, lack of chiral symmetry, and finite volume all could contribute to the over-estimation of the form factors. This can be easily understood within...
Stefan Scherer
(Johannes Gutenberg University, Mainz)
01/07/2015, 10:05
Talk
We discuss the extended on-mass-shell scheme for manifestly Lorentz-invariant baryon chiral perturbation theory. We present a calculation of pion photo- and electro-production up to and including order q^4. The low-energy constants have been fixed by fitting experimental data in all available reaction channels. Our results can be accessed via a web interface, the so-called chiral MAID...
