Determination of the E2/M1 ratio in the yN ->Delta(1232) transition from asimultaneous measurement of p((gamma)over-right-arrow,p)pi(0) and p((gamma)over-right-arrow, pi(+))n - art. no. 035204

Authors
Beck, R Krahn, HP Ahrens, J Annand, JRM Arends, HJ Audit, G Braghieri, A d'Hose, N Drechsel, D Hanstein, O McGeorge, JC Owens, RO Pedroni, P Pinelli, T Tamas, G Tiator, L Walcher, T
Citation
R. Beck et al., Determination of the E2/M1 ratio in the yN ->Delta(1232) transition from asimultaneous measurement of p((gamma)over-right-arrow,p)pi(0) and p((gamma)over-right-arrow, pi(+))n - art. no. 035204, PHYS REV C, 6103(3), 2000, pp. 5204
Citations number
62
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW C-NUCLEAR PHYSICS
ISSN journal
05562813 → ACNP
Volume
6103
Issue
3
Year of publication
2000
Database
ISI
SICI code
0556-2813(200003)6103:3<5204:DOTERI>2.0.ZU;2-3
Abstract
Tagged linearly polarized photons have been used at the Mainz Microtron (MA MI) for simultaneous measurements of the p(<(gamma)over right arrow>,p)pi(0 ). and p(<(gamma)over right arrow>,pi(+))n reaction channels to study the g amma N-->Delta(1232) transition. The energy dependence of the magnetic dipo le M-1+(3/2) and electric quadrupole E-1+(3/2) amplitudes have been extract ed from these data in the photon energy range from 270 to 420 MeV. The E2/M 1 ratio for the gamma N-->Delta(1232) transition has been determined to be -(2.5+/-0.1(stat)+/-0.2(sys))% at the resonance position (delta(33)=90 degr ees).