Pion polarizability at CERN COMPASS

Murray Moinester

Pion polarizability at CERN COMPASS

School of Physics and Astronomy

Research output: Contribution to journal › Conference article › peer-review

Abstract

The electric α_π and magnetic β_π 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 α_π = - β_π = (1.9±0.7_stat±0.8 _syst)×10^-4fm³, in agreement with ChPT.

Original language	English
Journal	Proceedings of Science
State	Published - 2013
Event	2013 European Physical Society Conference on High Energy Physics, EPS-HEP 2013 - Stockholm, Sweden Duration: 18 Jul 2013 → 24 Jul 2013

Cite this

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title = "Pion polarizability at CERN COMPASS",

abstract = "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.",

author = "Murray Moinester",

year = "2013",

language = "אנגלית",

journal = "Proceedings of Science",

issn = "1824-8039",

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note = "null ; Conference date: 18-07-2013 Through 24-07-2013",

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AU - Moinester, Murray

PY - 2013

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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.

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M3 - מאמר מכנס

AN - SCOPUS:84887468797

JO - Proceedings of Science

JF - Proceedings of Science

SN - 1824-8039

Y2 - 18 July 2013 through 24 July 2013

ER -

Pion polarizability at CERN COMPASS

Abstract

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