https://doi.org/10.1140/epja/i2005-10212-2
Hadron Physics
Measurement of the LT-asymmetry in πelectroproduction at the energy of the Δ(1232)-resonance
1
Physikalisches Institut, Rheinische Friedrich-Wilhelms-Universität, D-53115, Bonn, Germany
2
NIKHEF, Amsterdam, The Netherlands
3
Institut für Kernphysik, Johannes Gutenberg-Universität, D-55099, Mainz, Germany
4
Institut für Kernphysik, Technische Universität Darmstadt, D-64289, Darmstadt, Germany
5
Institut Jožef Stefan, University of Ljubljana, SI-1001, Ljubljana, Slovenia
* e-mail: elsner@physik.uni-bonn.de
Received:
15
July
2005
Accepted:
3
January
2006
Published online:
6
February
2006
The reaction p(e, e'p)π0 has been studied at Q
2 = 0.2 (GeV/c)2 in the region of W = 1232MeV. From measurements left and right of 
, cross-section asymmetries ρLT have been obtained in forward kinematics ρLT(
= 20°) = (- 11.68±2.36stat±2.36sys) and backward kinematics ρLT( = 160°) = (12.18±0.27stat±0.82sys) π0. Multipole ratios 
{S
1+
*
M
1+}/| M
1+|2 and {S
0+
*
M
1+}/| M
1+|2 were determined in the framework of the MAID2003 model. The results are in agreement with older data. The unusally strong negative {S
0+
*
M
1+}/| M
1+|2 required to bring also the result of Kalleicher et al. in accordance with the rest of the data is almost excluded.
PACS: 13.60.Le Meson production – / 13.40.-f Electromagnetic processes and properties – / 14.20.Gk Baryon resonances with S = 0 –
© Società Italiana di Fisica and Springer-Verlag, 2006
