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Titolo:
MEASUREMENT OF THE E2 M1 RATIO IN THE N-]DELTA TRANSITION USING THE REACTION P((GAMMA)OVER-RIGHT-ARROW,P)PI(0)/
Autore:
BECK R; KRAHN HP; AHRENS J; ARENDS HJ; AUDIT G; BRAGHIERI A; DHOSE N; HALL SJ; ISBERT V; KELLIE JD; MACGREGOR IJD; PEDRONI P; PINELLI T; TAMAS G; WALCHER T; WARTENBERG S;
Indirizzi:
UNIV MAINZ,INST KERNPHYS D-55099 MAINZ GERMANY IST NAZL FIS NUCL,SEZ PAVIA I-27100 PAVIA ITALY UNIV GLASGOW,DEPT PHYS & ASTRON GLASGOW G12 8QQ LANARK SCOTLAND CENS,SERV PHYS NUCL,DEPT ASTROPHYS PHYS PARTICULES PHYS NUCL & INSTRUF-91191 GIF SUR YVETTE FRANCE
Titolo Testata:
Physical review letters
fascicolo: 4, volume: 78, anno: 1997,
pagine: 606 - 609
SICI:
0031-9007(1997)78:4<606:MOTEMR>2.0.ZU;2-O
Fonte:
ISI
Lingua:
ENG
Soggetto:
RELATIVIZED QUARK-MODEL; CHIRAL BAG MODELS; PION-PHOTOPRODUCTION; SKYRME MODEL; DEPENDENCE; AMPLITUDE; MICROTRON; REGION; DESIGN; DELTA;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
42
Recensione:
Indirizzi per estratti:
Citazione:
R. Beck et al., "MEASUREMENT OF THE E2 M1 RATIO IN THE N-]DELTA TRANSITION USING THE REACTION P((GAMMA)OVER-RIGHT-ARROW,P)PI(0)/", Physical review letters, 78(4), 1997, pp. 606-609

Abstract

The small electric quadrupole E2 amplitude of the predominantly magnetic dipole M1 p --> Delta(1232) transition has been measured using 270to 320 MeV tagged linearly polarized photons in the p(<(gamma)over right arrow>, p)pi(o) reaction at the Mainz Microtron MAMI. Differentialcross sections and photon asymmetries were determined by measuring the recoil proton in the cylindrically symmetric 4 pi detector DAPHNE. From the proton angular distributions the ratio E2/M1 = -(2.5 +/- 0.2 +/- 0.2)% at the maximum of the Delta(1232) resonance has been derived.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 07/08/20 alle ore 07:05:41