Light-cone QCD sum rules for the Λ baryon electromagnetic form factors and its magnetic moment

被引：12
|
作者：
Liu, Yong-Lu [1 ]
Huang, Ming-Qiu [1 ]
Wang, Dao-Wei [1 ]
机构：
[1] Natl Univ Def Technol, Dept Phys, Changsha 410073, Hunan, Peoples R China
来源：
EUROPEAN PHYSICAL JOURNAL C | 2009年 / 60卷 / 04期
基金：
中国国家自然科学基金;
关键词：
CHARGED-PION ELECTROPRODUCTION; DECAY SIGMA+->P-GAMMA; RESONANCE PHYSICS; 8.83 (GEV/C)(2); OCTET BARYONS; NUCLEON; PROTON; Q(2)=1.75; NEUTRON; MESON;
D O I：
10.1140/epjc/s10052-009-0971-9
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：
We present the light-cone QCD sum rules up to twist 6 for the electromagnetic form factors of the Lambda baryon. To estimate the magnetic moment of the baryon, the magnetic form factor is fitted by the dipole formula. The numerical value of our estimation is mu(Lambda) =-(0.64 +/- 0.04) mu(N), which is in accordance with the experimental data and the existing theoretical results. We find that it is twist 4 but not the leading twist distribution amplitudes that dominate the results.
引用
收藏
页码：593 / 601
页数：9
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