N-]DELTA-TRANSITION FROM SIMULTANEOUS MEASUREMENTS OF P((GAMMA)OVER-RIGHT-ARROW,PI) AND P((GAMMA)OVER-RIGHT-ARROW,GAMMA)

Authors
BLANPIED G BLECHER M CARACAPPA A DJALALI C GIORDANO G HICKS K HOBLIT S KHANDAKER M KISTNER OC KUCZEWSKI A LOWRY M LUCAS M MATONE G MICELI L PREEDOM B REBREYEND D SANDORFI AM SCHAERF C SEALOCK RM STROHER H THORN CE THORNTON ST TONNISON J WHISNANT CS ZHANG H ZHAO X
Citation
G. Blanpied et al., N-]DELTA-TRANSITION FROM SIMULTANEOUS MEASUREMENTS OF P((GAMMA)OVER-RIGHT-ARROW,PI) AND P((GAMMA)OVER-RIGHT-ARROW,GAMMA), Physical review letters, 79(22), 1997, pp. 4337-4340
Citations number
38
Journal title
Physical review letters → ACNP
ISSN journal
00319007
Volume
79
Issue
22
Year of publication
1997
Pages
4337 - 4340
Database
ISI
SICI code
0031-9007(1997)79:22<4337:NFSMOP>2.0.ZU;2-5
Abstract
New high-precision measurements of p((gamma)over-right-arrow,pi) and p ((gamma)over-right-arrow,gamma) cross sections and beam asymmetries ha ve been combined with other polarization ratios in a simultaneous anal ysis of both reactions. Compton scattering has provided two important new constraints on the photopion amplitude. The E2/M1 mixing ratio for the N --> delta transition extracted from this analysis is [-3.0 +/- 0.3(stat + syst) +/- 0.2 (model)]%. Both data and analysis of this wor k are in conflict with recent results from Mainz.