Structure of the nucleon from electromagnetic timelike form factors

被引：75

作者：

Iachello, F ^{[1
]}

Wan, Q ^{[1
]}

机构：

[1] Yale Univ, Sloane Phys Lab, Ctr Theoret Phys, New Haven, CT 06520 USA

来源：

PHYSICAL REVIEW C | 2004年 / 69卷 / 05期

关键词：

D O I：

10.1103/PhysRevC.69.055204

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：

Recent experimental data on spacelike and timelike form factors of the nucleon are analyzed in terms of a model with an intrinsic structure and a meson cloud. The calculations are in perfect agreement with spacelike proton data, but deviate drastically from spacelike neutron data at Q(2) > 1 (GeV/c)(2). We suggest that timelike data be used to understand this discrepancy. Analysis of timelike data shows excellent agreement with both proton and neutron data in the entire range of measured q(2) = -Q(2), 3.52 less than or equal to q(2) less than or equal to 15 (GeV/c)(2) values.

引用

页码：055204 / 1

页数：5

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