Sea quark contributions to nucleon electromagnetic form factors with the nonlocal chiral effective Lagrangian

被引：0

作者：

杨明炀 ^{[1
,2
]}

王平 ^{[1
,3
]}

机构：

[1] Institute of High Energy Physics CAS

[2] College of Physics Sciences University of Chinese Academy of Sciences

[3] Theoretical Physics Center for Science Facilities CAS

来源：

Chinese Physics C | 2020年 / 05期

关键词：

electromagnetic form factors; nonlocal Lagrangian; chiral symmetry;

D O I：

暂无

中图分类号：

O572.33 [介子];

学科分类号：

070202 ;

摘要：

The sea quark contributions to the nucleon electromagnetic form factors of the up, down and strange quarks are studied with the nonlocal chiral effective Lagrangian. Both octet and decuplet intermediate states are included in the one loop calculations. Compared with the strange quark form factors, although their signs are the same,the absolute value of the light quark form factors are much larger. For both the electric and magnetic form factors, the contribution of the d quark is larger than of the u quark. The current lattice simulations of the light sea quark form factors are in between our results for the u and d quarks.

引用

页码：4 / 10

页数：7

共 6 条

[1] Constraints on the s ? s ˉ asymmetry of the proton in chiral effective theory[J] . X.G. Wang,Chueng-Ryong Ji,W. Melnitchouk,Y. Salamu,A.W. Thomas,P. Wang. Physics Letters B . 2016
[2] Parity-Violating Electron Scattering and the Electric and Magnetic Strange Form Factors of the Nucleon[J] . D.S. Armstrong,R.D. McKeown. Annual Review of Nuclear and Particle Science . 2012 (1)
[3] The strangeness form factors of the proton within nonrelativistic constituent quark model revisited
Kiswandhi, Alvin
Lee, Hao-Chun
Yang, Shin Nan
[J]. PHYSICS LETTERS B, 2011, 704 (04) : 373 - 377
[4] New quantization conditions for field theory without divergence
Wang Ping
[J]. CHINESE PHYSICS C, 2011, 35 (03) : 223 - 227
[5] Electromagnetic excitation of the Δ ( 1232 ) -resonance[J] . Vladimir Pascalutsa,Marc Vanderhaeghen,Shin Nan Yang. Physics Reports . 2007 (5)
[6] Chiral and continuum extrapolation of partially-quenched lattice results[J] . C.R. Allton,W. Armour,D.B. Leinweber,A.W. Thomas,R.D. Young. Physics Letters B . 2005 (1)

← 1 →