Hard exclusive production of two pions

被引：1
|
作者：
Polyakov, MV [1 ]
机构：
[1] Petersburg Nucl Phys Inst, Div Theory, Gatchina 188350, Russia
来源：
NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS | 1999年 / 79卷
关键词：
D O I：
10.1016/S0920-5632(99)00720-3
中图分类号：
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号：
摘要：
The leading twist parametrization of dipion mass distribution in hard exclusive reactions is proposed. The parameters of this parametrization are related to quark distributions (usual and skewed) in the pion and to distribution amplitudes of mesons (pi, rho, etc.). We show that measurements of the shape of dipion mass distribution in hard exclusive reactions can give important information about partonic structure of the pion. The expression for the amplitude of the reaction gamma*gamma --> pi pi near the threshold in terms of singlet quark distribution in the pion is presented.
引用
收藏
页码：349 / 351
页数：3
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