The Spin Crisis of the Proton

  • The relationship between the Gerasimov-Drell-Hearn(GDH)sum rule and the first monent,ΓP-the proton spin dependent structure function integral,is established.According to the sum rule and quark structure model of baryon,[SUsf(6)⊙O(3)]⊙SUc(3),the spin problem of the proton is discussed The present theoretical results are also compared with the data measured by EMC and SLAC groups.Our prediction is in good agreement with the data.We find that the P33(1232)photo-cxcitation dominates the spin structure function integrals and contributes negatively at low momentum transfer.At higher momentum transfer,the contribution of the P33 is positive,and it decreases rapidly as Q2 increasing and finally becomes negligible The integral changes its sign from negative into positive at about Q2=0.3GeV2.
  • 加载中
  • [1] EM Colab.,J.Ashman et al.,Phys.Leet.,B206(1988)364;EM Collab.J.Ashman et al.,Nucl.Phys.,B328(1989)1.[2]E.Leader,E.Predazzi,An Introdnction to Gauge theories and the new Phviscs,Campridge Press,1982.[3]R.Decker,M.Nowakowski,U.Wiedner,CERN-PPE/92-010,23,Jan.1992.[4]B.L.Iole,V.A.Khoze.L.N.Lppatov,Hard Processes,North Holand,1984.[5]S.D.Drel,A.O.Heam. Phys.Rev.Lett.,16(1966)908;S.B.Gerasimov,Sov.J.Nucl.Phys.,2(1966)430.[6]J.Elis,R.L.Jaffe,Phys.Rev.,D9(1974)1444:D10(1974)1669(E).[7]Zhen-ping Li,Phys.Rev,D47(1993)1854.[8]Ma Wei-hsing,Zhang Lin,Zhenping Li,Q2-Dependence of Polariszed Structure Function of the Nucleon and Deuteron at Non-perturbation QCD Region,Nucl.Phys.,A,to be published.[9]V.Barkert.Z.Li.,Phys.Rev.,D47(1993)46.
  • 加载中

Get Citation
Ma Weixing and Wu Qing. The Spin Crisis of the Proton[J]. Chinese Physics C, 1997, 21(4): 362-367.
Ma Weixing and Wu Qing. The Spin Crisis of the Proton[J]. Chinese Physics C, 1997, 21(4): 362-367. shu
Milestone
Received: 1900-01-01
Revised: 1900-01-01
Article Metric

Article Views(3924)
PDF Downloads(539)
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

  1. 本站搜索
  2. 百度学术搜索
  3. 万方数据库搜索
  4. CNKI搜索

Email This Article

Title:
Email:

The Spin Crisis of the Proton

    Corresponding author: Ma Weixing,
  • Institute of High Energy Physics,The Chinese Academy of Sciences,Beijing 1000392 Department of Physics,Defense University of Scienceand Technology,Changsha 410073

Abstract: The relationship between the Gerasimov-Drell-Hearn(GDH)sum rule and the first monent,ΓP-the proton spin dependent structure function integral,is established.According to the sum rule and quark structure model of baryon,[SUsf(6)⊙O(3)]⊙SUc(3),the spin problem of the proton is discussed The present theoretical results are also compared with the data measured by EMC and SLAC groups.Our prediction is in good agreement with the data.We find that the P33(1232)photo-cxcitation dominates the spin structure function integrals and contributes negatively at low momentum transfer.At higher momentum transfer,the contribution of the P33 is positive,and it decreases rapidly as Q2 increasing and finally becomes negligible The integral changes its sign from negative into positive at about Q2=0.3GeV2.

    HTML

Reference (1)

目录

/

DownLoad:  Full-Size Img  PowerPoint
Return
Return