TY - JOUR
T1 - Pion polarizability at CERN COMPASS
AU - Moinester, Murray
PY - 2013
Y1 - 2013
N2 - The electric απ and magnetic βπ charged pion polarizabilities characterize the induced dipole moments of the pion during γπ scattering. These fundamental characterisitcs of the pion provide stringent tests of various theoretical models, for example chiral perturbation theory (ChPT). CERN COMPASS investigated pion Compton scattering γπ → γπ, via radiative pion Primakoff scattering (Bremsstrahlung of 190 GeV/c negative pions) in the nuclear Coulomb field of the Ni nucleus: π + Ni → π + γ + Ni. The resulting data are equivalent to γπ Compton scattering for laboratory γ's having momenta of order 1 GeV/c incident on a target pion at rest. The data yield preliminary polarizability values απ = - βπ = (1.9±0.7stat±0.8 syst)×10-4fm3, in agreement with ChPT.
AB - The electric απ and magnetic βπ charged pion polarizabilities characterize the induced dipole moments of the pion during γπ scattering. These fundamental characterisitcs of the pion provide stringent tests of various theoretical models, for example chiral perturbation theory (ChPT). CERN COMPASS investigated pion Compton scattering γπ → γπ, via radiative pion Primakoff scattering (Bremsstrahlung of 190 GeV/c negative pions) in the nuclear Coulomb field of the Ni nucleus: π + Ni → π + γ + Ni. The resulting data are equivalent to γπ Compton scattering for laboratory γ's having momenta of order 1 GeV/c incident on a target pion at rest. The data yield preliminary polarizability values απ = - βπ = (1.9±0.7stat±0.8 syst)×10-4fm3, in agreement with ChPT.
UR - http://www.scopus.com/inward/record.url?scp=84887468797&partnerID=8YFLogxK
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AN - SCOPUS:84887468797
SN - 1824-8039
JO - Proceedings of Science
JF - Proceedings of Science
T2 - 2013 European Physical Society Conference on High Energy Physics, EPS-HEP 2013
Y2 - 18 July 2013 through 24 July 2013
ER -