Evidence for nucleon-resonance excitation in ω-meson photoproduction

被引：35

作者：

Ajaka, J ^{[1
]}

Assafiri, Y

Bouchigny, S

Didelez, JP

Fichen, L

Guidal, M

Hourany, E

Kouznetsov, V

Kunne, R

Mushkarenkov, AN

Nedorezov, V

Rudnev, N

Turinge, A

Zhao, Q

机构：

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

[2] Russian Acad Sci, Inst Nucl Res, Moscow 117312, Russia

[3] IV Kurchatov Atom Energy Inst, Moscow 123182, Russia

[4] Univ Surrey, Dept Phys, Guildford GU2 7XH, Surrey, England

来源：

PHYSICAL REVIEW LETTERS | 2006年 / 96卷 / 13期

关键词：

D O I：

10.1103/PhysRevLett.96.132003

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The photoproduction of the omega meson has been studied at GRAAL from threshold up to a photon energy of 1.5 GeV. The differential cross sections and beam asymmetries have been measured precisely at all angles. The total cross section is also obtained. Systematic enhancements of the differential cross section at large angles and nonzero beam asymmetries at intermediate angles provide clear evidence for s- and u-channel resonant processes. The data are compared to the results of hadron and quark models.

引用

页数：4

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