Virtual Compton scattering measurements in the γ∗N→Δ transition

Sparveris, N. F. and Achenbach, P. and Gayoso, C. Ayerbe and Baumann, D. and Bernauer, J. and Bernstein, A. M. and Bohm, R. and Bosnar, Damir and Botto, T. and Christopoulou, A. and Dale, D. and Ding, M. and Distler, M. O. and Doria, L. and Friedrich, J. and Karabarbounis, A. and Makek, Mihael and Merkel, H. and Muller, U. and Nakagawa, I. and Neuhausen, R. and Nungesser, L. and Papanicolas, C. N. and Pasquini, B. and Piegsa, A. and Pochodzalla, J. and Potokar, M. and Seimetz, M. and Sirca, S. and Stave, S. and Stiliaris, S. and Walcher, Th. and Weis, M. (2008) Virtual Compton scattering measurements in the γ∗N→Δ transition. Physical Review C, 78 (1). pp. 18201-4. ISSN 0556-2813

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We report on new H(e, ep)γ measurements in the (1232) resonance at Q2 = 0.06 (GeV/c)2 carried out simultaneously with H(e, ep)π 0. It is the lowestQ2 for which the virtual Compton scattering (VCS) reaction has been studied in the first resonance region. The VCS measured cross sections are well described by dispersionrelation calculations in which the multipole amplitudes derived from H(e, ep)π 0 data are used as input, thus confirming the compatibility of the results. The derived resonant magnetic dipole amplitude M 3/2 1+ = (40.60 ± ; 0.70stat+sys)(10− 3/mπ +) at W = 1232 MeV is in excellent agreement with the value extracted from H(e, ep)π 0 measurements.

Item Type: Article
Keywords: baryon resonances with S=0, meson production, elastic and compton scattering, protons and neutrons
Date: July 2008
Subjects: NATURAL SCIENCES > Physics
Additional Information: Copyright (2008) by the American Physical Society.
Divisions: Faculty of Science > Department of Physics
Project code: 119-1191005-1021
Publisher: American Physical Society
Depositing User: Gordana Stubičan Ladešić
Date Deposited: 03 Jun 2014 11:33
Last Modified: 03 Jun 2014 11:33

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