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Titolo:
E(1+) M(1+) AND S-1+/M(1+) FROM AN ANALYSIS OF P(E,E'P)PI(0) IN THE REGION OF THE DELTA(1232) RESONANCE AT Q(2)=3.2 (GEV/C)(2)/
Autore:
BURKERT VD; ELOUADRHIRI L;
Indirizzi:
CONTINUOUS ELECTRON BEAM ACCELERATOR FACIL CTR,12000 JEFFERSON AVE NEWPORT NEWS VA 23606 CHRISTOPHER NEWPORT UNIV NEWPORT NEWS VA 23606
Titolo Testata:
Physical review letters
fascicolo: 20, volume: 75, anno: 1995,
pagine: 3614 - 3617
SICI:
0031-9007(1995)75:20<3614:EMASFA>2.0.ZU;2-Z
Fonte:
ISI
Lingua:
ENG
Soggetto:
RELATIVIZED QUARK-MODEL; PION-PHOTOPRODUCTION; BARYON RESONANCES; FORM-FACTORS; ELECTROPRODUCTION; TRANSITION; DELTA; GAMMA; Q2;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
22
Recensione:
Indirizzi per estratti:
Citazione:
V.D. Burkert e L. Elouadrhiri, "E(1+) M(1+) AND S-1+/M(1+) FROM AN ANALYSIS OF P(E,E'P)PI(0) IN THE REGION OF THE DELTA(1232) RESONANCE AT Q(2)=3.2 (GEV/C)(2)/", Physical review letters, 75(20), 1995, pp. 3614-3617

Abstract

We have analyzed exclusive p(e, e'p)pi(0) data to determine the electromagnetic and scalar transition multipoles in the mass region of-the Delta(1232) at the highest Q(2) value where data exist. The ratio of the electric quadrupole and the magnetic dipole transition moments is determined to be E(1+)/M(1+) = 0.06 +/- 0.02 +/- 0.03, and for the scalar quadrupole transition we find S-1+/M(1+) = 0.07 +/- 0.02 +/- 0.03. The results rule out that perturbative QCD governs the dynamics of thegamma(upsilon)ph transition at such Q(2). They are more consistent with predictions of relativistic extensions of the nonrelativistic constituent quark model.

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Documento generato il 04/07/20 alle ore 21:24:02