On the extraction of cross sections for π0 and η photoproduction off neutrons from deuteron data

被引:20
|
作者
Tarasov, V. E. [1 ]
Briscoe, W. J. [2 ]
Dieterle, M. [3 ]
Krusche, B. [3 ]
Kudryavtsev, A. E. [1 ,2 ]
Ostrick, M. [4 ]
Strakovsky, I. I. [2 ]
机构
[1] NRC Kurchatov Inst, Inst Theoret & Expt Phys, Moscow, Russia
[2] George Washington Univ, Washington, DC 20052 USA
[3] Univ Basel, Dept Phys, CH-4056 Basel, Switzerland
[4] Johannes Gutenberg Univ Mainz, Inst Kernphys, D-55122 Mainz, Germany
关键词
Atomic Nucleus; Slow Neutron; Fast Proton; Deuteron Wave Function; Pauli Spinor;
D O I
10.1134/S1063778816020186
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 discuss the procedure of extracting the photoproduction cross section for neutral pseudoscalar mesons off neutrons from deuteron data. The main statement is that the final-state-interaction corrections for the proton and neutron target are in general not equal, but for pi(0) production there are special cases where they have to be identical and there are large regions in the parameter space of incident photon energy and pion polar angle, I similar to*, where they happen to be quite similar. The corrections for both target nucleons are practically identical for pi 0 production in the energy range of the Delta(1232)3/2+ resonance due to the specific isospin structure of this excitation. Also above the Delta-isobar range large differences between proton and neutron correction factors are only predicted for extreme forward angles (I similar to* *lt; 20A degrees), but the results are similar for larger angles. The case of eta photoproduction is also briefly considered. Numerical results for the gamma p -> pi(0) p and gamma n -> pi(0) n correction factors are discussed. Also the model description for the available data on the differential gamma d -> pi(0) pn cross sections are given.
引用
收藏
页码:216 / 227
页数:12
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