Chinese Physics C > 2009, Vol. 33 > Issue(S1): 18-20 DOI: 10.1088/1674-1137/33/S1/006

Contributions of qqqq q components to nucleon spin structure

Abstract
HTML
Reference
Related

PDF

Abstract：
The spin structure of nucleons is presented in the framework of an extended quark model which in addition to the conventional qqq structure also takes into account qqqq q admixtures in the nucleon wave functions, where the qqqq q components are in colored quark cluster configurations. The axial vector weak coupling constant and spin distributions for polarized nucleons as well as spin content are obtained for the lowest positive parity qqqq q configurations in flavor-spin dependent interaction. In particular, the contributions of the down and strange quarks to the proton spin and the sum rule for polarized neutron are negative, in agreement with recent experiments.

References

[1]

. Helminen C, Riska D O. Nucl. Phys. A, 2002, 699: 6242. LI Q B, Riska D O. Phys. Rev. C, 2006, 73: 035201; Nucl.Phys. A, 2005, 766: 172; Phys. Rev. C, 2006, 74: 0152023. Juliá-Díaz, Riska D O. Nucl. Phys. A, 2006, 780: 1754. ZOU B S, Riska D O. Phys. Rev. Lett., 2005, 95: 072001;Riska D O, ZOU B S. Phys. Lett. B, 2006, 36: 2655. AN C S, Riska D O, ZOU B S. Phys. Rev. C, 2006, 73:0352076. AN C S, LI Q B, Riska D O, ZOU B S. Phys. Rev. C, 2006,74: 0552057. Donoghue J F, Golowich E. Phys. Rev. D, 1977, 15: 34218. HE H X, ZHANG X Z, ZHUO Y Z. Chinese Phys., 1984,4: 3599. ZOU B S. Int. J. Mod. Phys. A, 2006, 21: 83510. Particle Data Group. J. Phys. G: Nucl. Part. Phys., 2006,33: 96611. FNAL E866/NuSea Collaboration. Towell R S et al. Phys.Rev. D, 2001, 64: 05200212. HERMES Collaboration. Airaptian A et al. Phys. Rev. D,2007, 75: 01200713. de Florian D, Navarro G A, Sassot R. Phys. Rev. D, 2005,71: 094018

[1]	D. O. Riska. Five-quark components in baryons. Chinese Physics C, 2010, 34(9): 1201-1204.doi:10.1088/1674-1137/34/9/010
[2]	Ali N,Atashbar Tehrani. Jacobi polynomials and non-singlet structure function F₂(x,Q²) up to N³LO. Chinese Physics C, 2010, 34(9): 1479-1481.doi:10.1088/1674-1137/34/9/077
[3]	Atashbar Tehrani. Nucleon/nuclei polarized structure function, using Jacobi polynomials expansion. Chinese Physics C, 2010, 34(9): 1534-1537.doi:10.1088/1674-1137/34/9/093
[4]	WANG Fan,CHEN Xiang-Song,LU Xiao-Fu,SUN Wei-Min. Gauge invariance and quantization applied to atom and nucleon internal structure. Chinese Physics C, 2010, 34(9): 1312-1319.doi:10.1088/1674-1137/34/9/031
[5]	WANG Fan,CHEN Xiang-Song,SUN Wei-Min,. Nucleon internal structure: a new set of quark, gluon momentum, angular momentum operators and parton distribution functions. Chinese Physics C, 2009, 33(12): 1197-1204.doi:10.1088/1674-1137/33/12/023
[6]	AN Chun-Sheng. Five-quark components in N^*(1535). Chinese Physics C, 2009, 33(12): 1393-1396.doi:10.1088/1674-1137/33/12/063
[7]	HUA Hui,LI Zhong-Yu,WANG Shou-Yu,MENG Jie,LI Zhi-Huan,LI Xiang-Qing,XU Fu-Rong,LIU Hong-Liang,ZHANG Shuang-Quan,ZHOU Shan-Gui,YE Yan-Lin,JIANG Dong-Xing,ZHENG Tao,ZHU Li-Hua,WU Xiao-Guang,LI Guang-Sheng,HE Chuang-Ye,MA Li-Ying,LU Fei,FAN Feng-Ying,HAN Li-Ying,WANG He,XIAO Jun,LI Xue-Qin,CHEN Dong,FANG Xiao,LOU Jian-Lin,LIU Ying,HAO Xin,PAN Bo,LI Li-Hua. Structure change of¹⁵⁶Yb at high-spin states. Chinese Physics C, 2009, 33(S1): 148-150.doi:10.1088/1674-1137/33/S1/047
[8]	WANG Yan-Zhao,ZHANG Hong-Fei,GAO Yong-Hua,HOU Zhao-Yu,DONG Jian-Min,DUAN Chun-Gui,ZUO Wei. Quark distributions in nuclei and nuclear effects on nucleon structure functions. Chinese Physics C, 2009, 33(4): 263-268.doi:10.1088/1674-1137/33/4/005
[9]	A. J. Buchmann. Excited nucleon electromagnetic form factors from broken spin-flavor symmetry. Chinese Physics C, 2009, 33(12): 1257-1260.doi:10.1088/1674-1137/33/12/034
[10]	XU Qiang,ZHU Sheng-Jiang,CHE Xing-Lai,DING Huai-Bo,GU Long,ZHU Li-Hua,WU Xiao-Guang,LIU Ying,HE Chuang-Ye,LI Li-Hua,PAN Bo,HAO Xin,LI Guang-Sheng. High spin band structure in¹³⁹Nd. Chinese Physics C, 2009, 33(S1): 185-187.doi:10.1088/1674-1137/33/S1/059
[11]	SUN Liang,LU Jing-Bin,YANG Dong,WANG Lie-Lin,LIU Yun-Zuo,ZHU Li-Hua,WU Xiao-Guang,LI Guang-Sheng. Level scheme in¹⁶⁰Tm towards complete high-spin structure. Chinese Physics C, 2008, 32(S2): 134-137.
[12]	LI Xue-Qin,ZHU Li-Hua,WU Xiao-Guang,HE Chuang-Ye,LIU Ying,PAN Bo,HAO Xin,LI Li-Hua,WANG Zhi-Ming,LI Guang-Sheng,LI Zhong-Yu,WANG Shou-Yu,XU Qiang,WANG Jian-Guo,DING Huai-Bo,ZHAI Jian. Structure of high spin states in¹¹²In. Chinese Physics C, 2008, 32(S2): 124-126.
[13]	CUI Ying,CHEN Xiao-Lin,DENG Wei-Zhen,ZHU Shi-Lin. Possible Heavy Tetraquarks qQqQ,qqQQ and qQQQ. Chinese Physics C, 2007, 31(1): 7-13.
[14]	DONG Yu-Bing. Higher-Twist Effects on the Nucleon Spin Structure Functions in the Small Q²Range. Chinese Physics C, 2001, 25(8): 720-724.
[15]	Yang Jianjun,Ma Boqiang,Li Guanglie. Non-perturbative Quark Propagator and the Study of the Non-trivial Q²Dependence in the Nucleon Structure Functions. Chinese Physics C, 1997, 21(2): 146-156.
[16]	Yang Jianjun,Ma Boqiang,Li Guanglie. Nonperturbative Quark Propagator and Study of NontrivialQ-Dependence in Nucleon Structure Functions. Chinese Physics C, 1997, 21(S1): 471-482.
[17]	Dong Yubing. Effects of Negative Energy Components on N and Δ Spectra. Chinese Physics C, 1995, 19(S2): 191-197.
[18]	Zhu Shengjiang,Ma Wenchao,Ahmad,B. Dichter,H. Emling,R. Holzman,R. V. F. Janssens,T. L. Khoo,M. Quader,P. J. Daly,Z. Grabowski,M. Piiparinen,W. Trzaska,M. W. Drigert,U. Garg. High Spin Level Structure in¹⁵³Dy and Shape Changes in Neutron-Deficient Dy Nuclei. Chinese Physics C, 1991, 15(S2): 165-171.
[19]	Cao Zhijun,Shen Jianping,Li Guanglie. The Role of Nucleon-Nucleon Short-Range Correlations in the Nuclear Structure Function in thex> 1 Region. Chinese Physics C, 1989, 13(S3): 281-288.
[20]	He Zhenmin,Hou Yunzhi. Nuclear Effect on the Nucleon Structure Functions and HighP_TJet Production in p-Fe Collisions. Chinese Physics C, 1988, 12(S3): 245-250.

Access

Get Citation

WAN Meng, TIAN Wei-Zhao and CHEN Hong. Contributions of qqqq q components to nucleon spin structure[J]. Chinese Physics C, 2009, 33(S1): 18-20. doi: 10.1088/1674-1137/33/S1/006

WAN Meng, TIAN Wei-Zhao and CHEN Hong. Contributions of qqqq q components to nucleon spin structure[J]. Chinese Physics C, 2009, 33(S1): 18-20. doi:10.1088/1674-1137/33/S1/006 shu

RIS(for EndNote,Reference Manager,ProCite)

BibTex

Txt

Milestone

Received: 2008-10-22
Revised: 1900-01-01

Article Metric

Article Views(6301)
PDF Downloads(1216)
Cited by(0)

Policy on re-use

To reuse of subscription content published by CPC, the users need to request permission from CPC, unless the content was published under an Open Access license which automatically permits that type of reuse.

通讯作者:陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

Contributions of qqqq q components to nucleon spin structure

Corresponding author:WAN Meng,

Received Date:2008-10-22

Accepted Date:1900-01-01

Available Online:2009-01-10

Abstract:The spin structure of nucleons is presented in the framework of an extended quark model which in addition to the conventional qqq structure also takes into account qqqq q admixtures in the nucleon wave functions, where the qqqq q components are in colored quark cluster configurations. The axial vector weak coupling constant and spin distributions for polarized nucleons as well as spin content are obtained for the lowest positive parity qqqq q configurations in flavor-spin dependent interaction. In particular, the contributions of the down and strange quarks to the proton spin and the sum rule for polarized neutron are negative, in agreement with recent experiments.

HTML

Reference (1)

Contributions of qqqq q components to nucleon spin structure

Abstract：

References

Access

Article Metrics

Metrics

通讯作者:陈斌, bchen63@163.com

Email This Article