Photoproduction of neutral pion pairs in the Coulomb field of the nucleus

被引：2
|
作者：
Belkov, AA [1 ]
Dillig, M [1 ]
Lanyov, AV [1 ]
机构：
[1] UNIV ERLANGEN NURNBERG, INST THEORET PHYS 3, D-91058 ERLANGEN, GERMANY
来源：
JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS | 1997年 / 23卷 / 07期
关键词：
D O I：
10.1088/0954-3899/23/7/007
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 total cross section for Coulomb photoproduction of neutral pion pairs in the reaction gamma A --> pi(0) pi(0)A is estimated within the effective chiral Lagrangian approach. The amplitude of gamma gamma* --> pi(0) pi(0) with one off-shell photon is calculated at O(p(6)) in the momentum expansion; in addition, nuclear absorption is taken into account. Besides its experimental feasibility, the results of the calculation demonstrate that the reaction gamma A --> pi(0) pi(0)A is a powerful source of information on the process gamma gamma --> pi(0) pi(0) close to threshold.
引用
收藏
页码：823 / 835
页数：13
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