Measurement of the charged-pion polarisability @ Compass

Seminarium odbędzie się wyjątkowo o godz. 11:15.

In the paper published in Physical Review Letter in February 2015 the COMPASS experiment at CERN reported the key measurement on the strong interaction: pion polarisability. This very precise result is in good agreement with theory and in tension with previous dedicated measurements. The difference between previous measurements and theory remained unexplained for more than two decades. In the seminar I  will explain why this measurement is in great importance for our understanding of the strong interaction.

M.Kowal, W.Piechocki, L.Roszkowski, J.Skalski