ISSN:
1434-601X
Keywords:
PACS:14.20.Gk Baryon resonances with S=0 – 13.60.Rj Baryon productions – 13.60.Le Meson production – 13.40.-f Electromagnetic processes and properties – 13.60.-r Photon and charged-lepton interactions with hadrons
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract: The recoil proton polarization in the π0 production off the proton with longitudinally polarized electron beam has been studied as a means to measure quadrupole components in the N to Δ transition. On top of the Δ resonance a high sensitivity to a possible Coulomb quadrupole excitation is found in parallel kinematics. The ratio of S 1+/M 1+ multipole amplitudes can be determined from the ratio of the two in-scattering-plane recoil proton polarization components. Avoiding the absolute measurement of the polarizations, such a ratio allows small experimental uncertainties. Furthermore, the electron helicity independent proton polarization component enables the characterization of resonant and non-resonant pieces.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/s100500050077
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