Exclusive electroproduction of pion pairs

被引：0
|
作者：
Warkentin, N. [1 ]
Diehl, M.
Ivanov, D. Yu.
Schaefer, A.
机构：
[1] Univ Regensburg, Inst Theoret Phys, D-93040 Regensburg, Germany
[2] DESY, Deutsch Elektronen Synchrotron, D-22603 Hamburg, Germany
[3] Sobolev Inst Math, Novosibirsk 630090, Russia
来源：
EUROPEAN PHYSICAL JOURNAL A | 2007年 / 32卷 / 03期
关键词：
D O I：
10.1140/epja/i2007-10374-9
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 electroproduction of pion pairs on the nucleon in the framework of QCD factorization for hard exclusive processes. We extend previous analyses by taking the hard-scattering coefficients at next-to-leading order in alpha(s) . The dynamics of the produced pion pair is described by two-pion distribution amplitudes, for which we perform a detailed theoretical and phenomenological analysis. In particular, we obtain constraints on these quantities by comparing our results with measurements of angular observables that are sensitive to the interference between two-pion production in the isoscalar and isovector channels.
引用
收藏
页码：273 / 291
页数：19
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