Precise measurement of Σ beam asymmetry for positive pion photoproduction on the proton from 800 to 1500 MeV

被引：31

作者：

Bartalini, O ^{[1
]}

Bellini, V

Bocquet, JP

Capogni, M

Castoldi, M

D'Angelo, A

Didelez, JP

Di Salvo, R

Fantini, A

Gervino, G

Ghio, E

Girolami, B

Guidal, M

Hourany, E

Kouznetsov, V

Kunne, R

Lapik, A

Sandhi, PL

Lleres, A

Moricciani, D

Nedorezov, V

Nicoletti, L

Rebreyend, D

Renard, F

Roudnev, N

Schaerf, C

Sperduto, A

Sutera, M

Turinge, A

Zucchiatti, A

Arndt, R

Briscoe, W

Strakovsky, I

Workman, R

机构：

[1] Ist Nazl Fis Nucl, Sez Roma 2, I-00133 Rome, Italy

[2] Univ Roma Tor Vergata, I-00133 Rome, Italy

[3] Ist Nazl Fis Nucl, Sez Catania, I-95100 Catania, Italy

[4] Univ Catania, I-95100 Catania, Italy

[5] Inst Nucl Sci, IN2P3, F-38026 Grenoble, France

[6] Ist Nazl Fis Nucl, Sez Genova, I-16146 Genoa, Italy

[7] Univ Genoa, I-16146 Genoa, Italy

[8] Inst Phys Nucl, IN2P3, F-91406 Orsay, France

[9] Ist Nazl Fis Nucl, Sez Torino, I-10125 Turin, Italy

[10] Univ Turin, I-10125 Turin, Italy

[11] Ist Nazl Fis Nucl, Sez Roma 1, I-00161 Rome, Italy

[12] Inst Super Sanita, I-00161 Rome, Italy

[13] Inst Nucl Res, Moscow 117312, Russia

[14] Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy

[15] Inst Theoret & Expt Phys, Moscow 117259, Russia

[16] RRC Kurchatov Inst, Moscow 123182, Russia

[17] George Washington Univ, Washington, DC 20052 USA

来源：

PHYSICS LETTERS B | 2002年 / 544卷 / 1-2期

关键词：

pi(+) photoproduction; baryon resonances; polarization observables; photon beam asymmetry; partial wave analysis;

D O I：

10.1016/S0370-2693(02)02467-X

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The Sigma beam asymmetry for positive pion photoproduction on the proton has been measured over an angular range of 40-170degrees at photon energies from 0.8 to 1.5 GeV The resulting data set includes 237 accurate points, 136 of these belonging to an almost unexplored domain above 1.05 GeV. Data of such high precision provide severe constraints for partial wave analyses. The influence of this experiment on the GW multipole analysis is demonstrated. Significant changes are found in multipoles connected to the S-31(1620) and P-13 (1720) resonances. Comparisons using the MAID analysis are also presented. (C) 2002 Published by Elsevier Science B.V.

引用

页码：113 / 120

页数：8

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