N* resonances from KΛ amplitudes in sliced bins in energy

被引：0

作者：

Anisovich, A. V. ^{[1
,2
]}

Burkert, V. ^{[3
]}

Hadzimehmedovic, M. ^{[6
]}

Ireland, D. G. ^{[5
]}

Klempt, E. ^{[1
,3
]}

Nikonov, V. A. ^{[1
,2
]}

Omerovic, R. ^{[6
]}

Sarantsev, A. V. ^{[1
,2
]}

Stahov, J. ^{[6
]}

Svarc, A. ^{[4
]}

Thoma, U. ^{[1
]}

机构：

[1] Univ Bonn, Helmholtz Inst Strahlen & Kernphys, Nussallee 14-16, D-53115 Bonn, Germany

[2] Particle & Nucl Phys Inst, Orlova Rosha 1, Gatchina 188300, Russia

[3] Thomas Jefferson Lab, 12000 Jefferson Ave, Newport News, VA 23606 USA

[4] Rudjer Boskovic Inst, Bijenicka Cesta 54,POB 180, Zagreb 10002, Croatia

[5] Univ Glasgow, Sch Phys & Astron, SUPA, Glasgow G12 8QQ, Lanark, Scotland

[6] Univ Tuzla, Fac Nat Sci & Math, Univ 4, Tuzla 75000, Bosnia & Herceg

来源：

EUROPEAN PHYSICAL JOURNAL A | 2017年 / 53卷 / 12期

基金：

俄罗斯科学基金会; 英国科学技术设施理事会;

关键词：

PSEUDOSCALAR-MESON PHOTOPRODUCTION; OPERATOR EXPANSION METHOD; PARTIAL-WAVE ANALYSIS; QUARK-MODEL; MEV-C; SPIN OBSERVABLES; BARYON SPECTRUM; GAMMA-P; SCATTERING; DECAYS;

D O I：

10.1140/epja/i2017-12443-x

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

The two reactions gamma p -> K+Lambda and pi(-) p -> K-0 Lambda are analyzed to determine the leading photoproduction multipoles and the pion-induced partial wave amplitudes in slices of the invariant mass. The multipoles and the partial-wave amplitudes are simultaneously fitted in a multichannel Laurent+Pietarinen model (L+P model), which determines the poles in the complex energy plane on the second Riemann sheet close to the physical axes. The results from the L+P fit are compared with the results of an energy-dependent fit based on the Bonn-Gatchina (BnGa) approach. The study confirms the existence of several poles due to nucleon resonances in the region at about 1.9 GeV with quantum numbers J(P) = 1/2(+), 3/2(+), 1/2(-), 3/2(-), 5/2(-).

引用

页数：18

共 68 条

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