Simultaneous photoproduction of η and π0 mesons on the proton

被引：66

作者：

Ajaka, J. ^{[1
]}

Assafiri, Y. ^{[1
]}

Bartalini, O. ^{[2
,3
]}

Bellini, V. ^{[4
,5
]}

Bouchigny, S. ^{[1
]}

Castoldi, M. ^{[6
]}

D'Angelo, A. ^{[2
,3
]}

Didelez, J. P. ^{[1
]}

Di Salvo, R. ^{[2
,3
]}

Doering, M. ^{[7
]}

Fantini, A. ^{[2
,3
]}

Fichen, L. ^{[1
]}

Gervino, G. ^{[8
,9
]}

Ghio, F. ^{[10
,11
]}

Girolami, B. ^{[10
,11
]}

Giusa, A. ^{[5
]}

Guidal, M. ^{[1
]}

Hourany, E. ^{[1
]}

Kunne, R.

Lapik, A. ^{[12
]}

Sandri, P. Levi ^{[13
]}

Moricciani, D. ^{[2
,3
]}

Mushkarenkov, A. ^{[12
]}

Nedorezov, V. ^{[12
]}

Oset, E. ^{[14
,15
]}

Randieri, C. ^{[12
]}

Rudnev, N.

Russo, G. ^{[4
,5
]}

Schaerf, C. ^{[2
,3
]}

Sperduto, M. ^{[4
,5
]}

Sutera, M. ^{[4
,5
]}

Turinge, A. ^{[16
]}

机构：

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

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

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

[4] Univ Catania, I-95123 Catania, Italy

[5] Ist Nazl Fis Nucl, Lab Nazl Sud, I-95123 Catania, Italy

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

[7] Univ Georgia, Athens, GA 30602 USA

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

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

[10] Ist Nazl Fis Nucl, Sez Sanita, I-00191 Rome, Italy

[11] Ist Super Sanita, I-00191 Rome, Italy

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

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

[14] Univ Valencia, CSIC, Ctr Mixto, IFIC, Valencia 46071, Spain

[15] Univ Valencia, CSIC, Ctr Mixto, Dept Fis Teor, Valencia 46071, Spain

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

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 100卷 / 05期

关键词：

D O I：

10.1103/PhysRevLett.100.052003

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The analysis of the gamma p ->eta pi(0)p reaction has been performed using data from the GRAAL experiment. The total and differential cross sections and the beam asymmetry have been obtained from threshold up to 1.5 GeV of beam energy. The two resonances S-11(1535) and Delta(1700) are expected to be excited in the intermediate states of this reaction. The results are used to test predictions based on the assumption that both resonances are dynamically generated from the meson-baryon interaction provided by chiral Lagrangians. The term involving the Delta(1700) excitation, followed by the decay into eta Delta(1232), is found to be dominant.

引用

页数：5

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