η-meson photoproduction and N* resonances

被引：19
|
作者：
Choi, K. S. [1 ,2 ]
Nam, S. I. [3 ]
Hosaka, A. [4 ]
Kim, H. Ch [5 ]
机构：
[1] Pusan Natl Univ, Dept Phys, Pusan 609735, South Korea
[2] Pusan Natl Univ, Nucl Phys & Radiat Technol Inst NuRI, Pusan 609735, South Korea
[3] Kyoto Univ, Yukawa Inst Theoret Phys, Kyoto 6068502, Japan
[4] RCNP, Osaka 5670047, Japan
[5] Inha Univ, Dept Phys, Inchon 402751, South Korea
来源：
JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS | 2009年 / 36卷 / 01期
关键词：
ISOBAR-MODEL; PHOTOEXCITATION; PARTICLES; NUCLEONS; THETA(+); REGION; PROTON; SPIN;
D O I：
10.1088/0954-3899/36/1/015008
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：
We investigate the. photoproduction using the effective Lagrangian approach at the tree level. We include eight nucleon resonances, that is, D-13(1520), S-11(1535), S-11(1650), D-15(1675), F-15(1680), D-13(1700), P-11(1710), P-13(1720) as well as possible background contributions. In addition, we introduce the new nucleon resonance N*(1675) which was announced by the GRAAL, CB-ELSA and Tohoku LNS-GeV-gamma experiments. We investigate a possible role of the resonance with testing its spin and parity for four different cases of J(P) = 1/2(+/-) and 3/2(+/-). We calculate various cross sections including beam asymmetries for neutron and proton targets. We find noticeable isospin asymmetry in transition amplitudes for proton and neutron targets.
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页数：16
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