Abstract
The reactione+p →> e+π ++n at c.m. energyW=1125MeV and momentum transfer Q2=0.117GeV2/c2 has been measured. The transverse and longitudinal structure functions have been separated by varying the polarization of the virtual photon (Rosenbluth plot) with a 3 to 4% error. In addition the longitudinal-transverse interference term has been determined measuring the right-left asymmetry with an accuracy of 3%. The experimental data are compared to model calculations, and the sensitivity of the results to the axial and pion formfactors is discussed.
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References
for a recent review see D. Drechsel and L. Tiator, J. Phys. G18 (1992) 449
A.M. Bernstein and B.R. Holstein, Comm. Nucl. Part. Phys. 44 (1991) 1768
Y. Nambu and D. Lurie, Phys. Rev. 125 (1962) 1429, and Y. Nambu and E. Shrauner, Phys. Rev. 128 (1962) 862
S. Scherer and J.H. Koch, Nucl. Phys. A534 (1991) 461
J. Gasser and H. Leutwyler, Ann. Phys. (N. Y.) 158 (1984) 142
U.-G. Meißner, Rep. Prog. Phys. 56 (1993) 903
V. Bernard, J. Gasser, N. Kaiser and U.-G. Meißner, Phys. Lett. B 268 (1991) 291
G. Bardin et. al., Nucl. Phys. B120 (1977) 45
H. Herminghaus, H.H. Braun, H. Euteneuer, H. Fiedler, A. Gauch, G. Gruber, A. Hager, R. Herr, L. Jaeckel, P. Jennewein, K.H. Kaiser, R. Klein, H.-J. Kreidel, U. Ludwig-Mertin, K.W. Nilles, G. Patzner, H. Schröler, A. Streun, G. Stephan, T. Weis, and P. Zinnecker, Proc. LINAC Conf. 1990, Albuquerque, New Mexico
J. Ahrens, H. Backe, D. von Harrach, K.H. Kaiser, F. Klein, R. Neuhausen, und Th. Walcher, Nuclear Physics News 2 (1994) 5
K.I. Blomqvist et al., Jahresbericht 1992/1993, Institut für Kernphysik, Universität Mainz, pp. 61, and to be published
E. Amaldi, S. Fubini and G. Furlan, Pion Electroproduction, Springer Tracts in Modern Physics 83, Springer, Berlin, 1979
IM. Laget, Nucl. Phys. A481 (1988) 765
O. Hanstein, D. Drechsel and L. Tiator, Proc. of the Sixth International Symposium on Meson-Nucleon Physics and the Structure of the Nucleon, Blaubeuren, Germany, 1995, to be published inπN-Newsletters
R.A. Arndt, L.D. Roper and R.L. Workman, Scattering Analysis Interactive Dial-In Program (SAID), WI94
V. Bernard, N. Kaiser, T.-S.H. Lee and U.-G. Meißner, Phys. Rep. 246 (1994) 315
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Communicated by B. Povh
Work supported by the Deutsche Forschungsgemeinschaft, SFB 201
This paper comprises parts of the Doctorate thesis of A.W. Richter
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Blomqvist, K.I., Boeglin, W.U., Böhm, R. et al. Precise pion electroproduction in thep(e, e′ π+)n reaction at W=1125 MeV. Z. Physik A - Hadrons and Nuclei 353, 415–421 (1996). https://doi.org/10.1007/BF01285153
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DOI: https://doi.org/10.1007/BF01285153