Fakultät für Physik




Measurement of the Pion Polarisability at COMPASS, and more about the Pion's Chiral Dynamics

Dr. Jan Friedrich (Physik-Department E18, TU München)

Datum:  22.11.2012 16:00 Uhr – 17:00 Uhr

Ort: Am Coulombwall 1, Garching
Lecture Hall (ground floor)

The polarisability of a compound object tells us something about the inner binding - in case of the pion, its QCD structure allows only for a tiny deformation under electromagnetic forces. This has been systematically understood in terms of chiral perturbation theory, but has been for several decades in significant tension with the available experimental determinations. The COMPASS experiment at CERN has recently completed an analysis for a measurement, where the scattering of high-energetic pions in the Coulomb field of nuclei is identified and can be interpreted as Pion-Photon induced reactions. The extracted value for the pion polarisability indicates the solution of a 30 years old riddle in particle physics.

Downloads zur Veranstaltung



03.09.2018  -  07.09.2018

10.09.2018  -  20.09.2018

24.09.2018  -  09.10.2018

01.10.2018  -  02.10.2018