EXTRACTION OF THE RATIO OF THE N-ASTERISK(1535) ELECTROMAGNETIC HELICITY AMPLITUDES FROM ETA-PHOTOPRODUCTION OFF NEUTRONS AND PROTONS

被引：30

作者：

MUKHOPADHYAY, NC ^{[1
]}

ZHANG, JF ^{[1
]}

BENMERROUCHE, M ^{[1
]}

机构：

[1] UNIV SASKATCHEWAN,ACCELERATEUR LINEAIRE LAB,SASKATOON,SK S7N 5C6,CANADA

来源：

PHYSICS LETTERS B | 1995年 / 364卷 / 01期

关键词：

EFFECTIVE LAGRANGIAN; HADRON STRUCTURE; ETA PHOTOPRODUCTION; HELICITY AMPLITUDE;

D O I：

10.1016/0370-2693(95)01255-X

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Using the recent precise measurements of eta photoproduction in proton and deuteron targets, we extract the ratio of the helicity amplitudes A(1/2)(n)/A(1/2)(p), for the excitation of N*(1535), in the effective Lagrangian approach. It is fairly model-independent, Free from the final-state interaction effects, and negative as predicted by the quark models. We stress the importance of polarization observables in further elucidation of the N*(1520) photoexcitation amplitudes.

引用

页码：1 / 7

页数：7

共 13 条

[1] AZNAURYAN IG, 1985, SOV J NUCL PHYS+, V41, P158
[2] ETA-PHOTOPRODUCTION FROM THRESHOLD THROUGH THE S11(1535) RESONANCE
BENMERROUCHE, M
MUKHOPADHYAY, NC
[J]. PHYSICAL REVIEW LETTERS, 1991, 67 (09) : 1070 - 1073
[3] EFFECTIVE LAGRANGIAN APPROACH TO THE THEORY OF ETA-PHOTOPRODUCTION IN THE N-ASTERISK(1535) REGION
BENMERROUCHE, M
MUKHOPADHYAY, NC
ZHANG, JF
[J]. PHYSICAL REVIEW D, 1995, 51 (07): : 3237 - 3266
[4] PHOTOPRODUCTION AND ELECTROPRODUCTION OF NONSTRANGE BARYON RESONANCES IN THE RELATIVIZED QUARK-MODEL
CAPSTICK, S
[J]. PHYSICAL REVIEW D, 1992, 46 (07): : 2864 - 2881
[5] BARYON CURRENT MATRIX-ELEMENTS IN A LIGHT-FRONT FRAMEWORK
CAPSTICK, S
KEISTER, BD
[J]. PHYSICAL REVIEW D, 1995, 51 (07) : 3598 - 3612
[6] QUASI-2-BODY DECAYS OF NONSTRANGE BARYONS
CAPSTICK, S
ROBERTS, W
[J]. PHYSICAL REVIEW D, 1994, 49 (09): : 4570 - 4586
[7] RECOIL PROTON POLARIZATION IN ETA PHOTOPRODUCTION
HEUSCH, CA
PRESCOTT, CY
ROCHESTE.LS
WINSTEIN, BD
[J]. PHYSICAL REVIEW LETTERS, 1970, 25 (19) : 1381 - &
[8] BARYON DECAYS IN A QUARK-MODEL WITH CHROMODYNAMICS
KONIUK, R
ISGUR, N
[J]. PHYSICAL REVIEW D, 1980, 21 (07) : 1868 - 1886
[9] NEAR-THRESHOLD PHOTOPRODUCTION OF ETA-MESONS OFF THE PROTON
KRUSCHE, B
AHRENS, J
ANTON, G
BECK, R
FUCHS, M
GABLER, AR
HARTER, F
HALL, S
HARTY, P
HLAVAC, S
MACGREGOR, D
MCGEORGE, C
METAG, V
OWENS, R
PEISE, J
ROBIGLANDAU, M
SCHUBERT, A
SIMON, RS
STROHER, H
TRIES, V
[J]. PHYSICAL REVIEW LETTERS, 1995, 74 (19) : 3736 - 3739
[10] KRUSCHE B, IN PRESS

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