Coherent Neutral Pion and eta Meson Photoproduction on the Deuteron

被引：0
|
作者：
Ishikawa, Takatsugu [1 ]
机构：
[1] Mikamine 1-2-1,Taihaku, Sendai, Miyagi 9820826, Japan
来源：
FEW-BODY SYSTEMS | 2021年 / 62卷 / 03期
关键词：
MONITOR; NUCLEON;
D O I：
10.1007/s00601-021-01621-4
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Coherent photoproduction of the neutral pion and eta meson on the deuteron, gamma d ->lambda(0) eta d, has been experimentally studied at E-gamma < 1.15 GeV. The total cross section as a function of the incident energy shows a rapid increasing behavior below 1 GeV. The existing theoretical calculations well-reproduce the data including final-state interactions. We havemeasured the differential cross sections d sigma/dM(pi d), d sigma/dM(eta d), and d sigma/d Omega(d) in the gamma d center-of-mass frame for the first time. An enhancement is observed near the.d threshold in d(s)/dM(eta d), suggesting a strong eta d attraction. The enhancement is consistent with a predicted isoscalar 1(-) eta NN bound state from the eta NN and pi NN coupled-channel calculation.
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页数：5
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