1. Measurement of electric and magnetic polarizabilities with Primakoff reaction at COMPASS
- Author
-
M. Colantoni
- Subjects
Physics ,Quark ,Particle physics ,Chiral perturbation theory ,Meson ,Physics::Instrumentation and Detectors ,High Energy Physics::Lattice ,Nuclear Theory ,Hadron ,General Physics and Astronomy ,Elementary particle ,Nuclear physics ,Pion ,Polarizability ,High Energy Physics::Experiment ,Nuclear Experiment ,Primakoff effect - Abstract
The COMPASS spectrometer is well suited to perform precise measurements of the pion polarizabilities via the Primakoff reaction π(Z,A)→π+(Z,A)+ψ. The electric\((\bar \alpha _\pi )\) and magnetic\((\bar \beta _\pi )\) polarizabilities characterize the response of the response of the pion quark substructure to the electromagnetic field of the ψ during the πψ scattering. The results of a simulation for the foreseen 2004 setup are presented. The measurement of the pion polarizabilities allows for a test of the chiral perturbation theory (χPT) predictions.
- Published
- 2005
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