Genre
Journal ArticleDate
2013-01-01Author
Sparveris, NStave, S
Achenbach, P
Ayerbe Gayoso, C
Baumann, D
Bernauer, J
Bernstein, AM
Böhm, R
Bosnar, D
Botto, T
Christopoulou, A
Dale, D
Ding, M
Distler, MO
Doria, L
Friedrich, J
Karabarbounis, A
Makek, M
Merkel, H
Müller, U
Nakagawa, I
Neuhausen, R
Nungesser, L
Papanicolas, CN
Piegsa, A
Pochodzalla, J
Potokar, M
Seimetz, M
Širca, S
Stiliaris, S
Walcher, T
Weis, M
Permanent link to this record
http://hdl.handle.net/20.500.12613/5976
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Show full item recordDOI
10.1140/epja/i2013-13136-2Abstract
We report new p(e, e′p)π̊ measurements in the Δ+(1232) resonance at the low momentum transfer region utilizing the magnetic spectrometers of the A1 Collaboration at MAMI. The mesonic cloud dynamics are predicted to be dominant and appreciably changing in this region while the momentum transfer is sufficiently low to be able to test chiral effective field theory calculations. The results disagree with predictions of constituent quark models and are in reasonable agreement with dynamical calculations with pion cloud effects, chiral effective field theory and lattice calculations. The reported measurements suggest that improvement is required to the theoretical calculations and provide valuable input that will allow their refinements. © Società Italiana di Fisica / Springer-Verlag 2013.Citation to related work
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http://dx.doi.org/10.34944/dspace/5958