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Title: E{sub 1+}/M{sub 1+} and S{sub 1+}/M{sub 1+} from an analysis of p(e,e{prime}p){pi}{sup 0} in the region of the {Delta} (1232) resonance at Q{sup 2}=3.2 (GeV/c){sup 2}

Abstract

The authors have analyzed exclusive p(e,e{prime}p){pi}{sup 0} data to determine the electromagnetic and scalar transition multipoles in the mass region of the {Delta} (1232) at the highest Q{sup 2} value where data exist. The ratio of the electric quadrupole and the magnetic dipole transition moments is determined to E{sub 1+}/M{sub 1+} = 0.06{+-}0.02{+-}0.03, and for the scalar quadrupole transition they find S{sub 1+}/M{sub 1+} = 0.07{+-}0.02{+-}0.03. The results rule out that perturbative QCD governs the dynamics of the {gamma}{sub {nu}}p{Delta} transition at such Q{sub 2}. They are more consistent with relativistic quark model calculations using the light cone formalism.

Authors:
;
Publication Date:
Research Org.:
Thomas Jefferson National Accelerator Facility, Newport News, VA (US)
Sponsoring Org.:
USDOE Office of Energy Research (ER) (US)
OSTI Identifier:
756164
Report Number(s):
DOE/ER/40150-1529; CEBAF-PR-95-01
TRN: US0002738
DOE Contract Number:  
AC05-84ER40150
Resource Type:
Journal Article
Journal Name:
Phys Rev Lett
Additional Journal Information:
Other Information: Submitted to Phys Rev Lett; PBD: 1 May 1995
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; PIONS NEUTRAL; ELECTROPRODUCTION; FOUR MOMENTUM TRANSFER; EXCLUSIVE INTERACTIONS; DELTA-1232 BARYONS; MULTIPOLES; QUARK MODEL; QUANTUM CHROMODYNAMICS; GEV RANGE 01-10; LIGHT CONE; TRANSITION AMPLITUDES; PARTICLE STRUCTURE

Citation Formats

Burkert, V, and Elouadrhiri, L. E{sub 1+}/M{sub 1+} and S{sub 1+}/M{sub 1+} from an analysis of p(e,e{prime}p){pi}{sup 0} in the region of the {Delta} (1232) resonance at Q{sup 2}=3.2 (GeV/c){sup 2}. United States: N. p., 1995. Web.
Burkert, V, & Elouadrhiri, L. E{sub 1+}/M{sub 1+} and S{sub 1+}/M{sub 1+} from an analysis of p(e,e{prime}p){pi}{sup 0} in the region of the {Delta} (1232) resonance at Q{sup 2}=3.2 (GeV/c){sup 2}. United States.
Burkert, V, and Elouadrhiri, L. Mon . "E{sub 1+}/M{sub 1+} and S{sub 1+}/M{sub 1+} from an analysis of p(e,e{prime}p){pi}{sup 0} in the region of the {Delta} (1232) resonance at Q{sup 2}=3.2 (GeV/c){sup 2}". United States. https://www.osti.gov/servlets/purl/756164.
@article{osti_756164,
title = {E{sub 1+}/M{sub 1+} and S{sub 1+}/M{sub 1+} from an analysis of p(e,e{prime}p){pi}{sup 0} in the region of the {Delta} (1232) resonance at Q{sup 2}=3.2 (GeV/c){sup 2}},
author = {Burkert, V and Elouadrhiri, L},
abstractNote = {The authors have analyzed exclusive p(e,e{prime}p){pi}{sup 0} data to determine the electromagnetic and scalar transition multipoles in the mass region of the {Delta} (1232) at the highest Q{sup 2} value where data exist. The ratio of the electric quadrupole and the magnetic dipole transition moments is determined to E{sub 1+}/M{sub 1+} = 0.06{+-}0.02{+-}0.03, and for the scalar quadrupole transition they find S{sub 1+}/M{sub 1+} = 0.07{+-}0.02{+-}0.03. The results rule out that perturbative QCD governs the dynamics of the {gamma}{sub {nu}}p{Delta} transition at such Q{sub 2}. They are more consistent with relativistic quark model calculations using the light cone formalism.},
doi = {},
journal = {Phys Rev Lett},
number = ,
volume = ,
place = {United States},
year = {1995},
month = {5}
}