New constraints on the pion EM form factor using Π′(-Q2)

被引：0
|
作者：
Abbas, Gauhar [1 ]
Ananthanarayan, B. [1 ]
Ramanan, S. [1 ]
机构：
[1] Indian Inst Sci, Ctr High Energy Phys, Bangalore 560012, Karnataka, India
来源：
EUROPEAN PHYSICAL JOURNAL A | 2009年 / 41卷 / 01期
关键词：
ELECTROPRODUCTION;
D O I：
10.1140/epja/i2009-10802-x
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 study the constraints arising on the expansion parameters c and d of the pion electromagnetic form factor from the inclusion of pure spacelike data and the phase of timelike data along with one spacelike datum, using as input the first derivative of the QCD polarization amplitude Pi'(-Q(2)). These constraints when combined with other analyses, provide a valuable check on a determination of c due to Guo et al. and on our previous work where pionic contribution to the (g - 2) of the muon was used as the input. This work further illustrates the power of analyticity techniques in form factor analysis.
引用
收藏
页码：93 / 100
页数：8
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