Recoil polarization and beam-recoil double polarization measurement of eta electroproduction on the proton in the region of the S_{;11};(1535) resonance. (CROSBI ID 134746)
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Podaci o odgovornosti
Merkel, H. ; Achenbach, P. ; Ayerbe Gayoso, C.A. ; Bernauer, J.C. ; Böhm, R. ; Bosnar, Damir ; Cheymol, B. ; Distler, M.O. ; Doria, L. ; Fonvieille, H. ; Friedrich, J. ; Janssens, P. ; Makek, Mihael ; Müller, U. ; Nungesser, L. ; Pochodzalla, J. ; Potokar, M. ; Sánchez Majos, S. ; Schlimme, B.S. ; Sirca, S. ; Tiator, L. ; Walcher, Th. ; Weinriefer, M.
engleski
Recoil polarization and beam-recoil double polarization measurement of eta electroproduction on the proton in the region of the S_{;11};(1535) resonance.
The beam-recoil double polarization Ph x0 and Ph z0 and the recoil polarization Py0 were measured for the first time for the pe~ ; e0p~ reaction at a four-momentum transfer of Q2 0:1 GeV2=c2 and a center of mass production angle of 120 at the Mainz Microtron MAMI-C.With a center of mass energy range of 1500 MeV<W <1550 MeV the region of the S111535 and D131520 resonance was covered. Theresults are discussed in the framework of a phenomenological isobar model (Eta-MAID). While Ph x0 and Ph z0 are in good agreement with the model, Py0 shows a significant deviation, consistent with existing photoproduction data on the polarized-target asymmetry.
Electroproduction; Polarization; Meson; Resonances
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