Search for the Pentaquark at the HERMES

  • Evidence for a narrow baryon state is found in quasi–real photo–production on a deuterium target through the decay channel K0sp→π+π–p. A peak is found in K0sp invariant mass spectrum at 1528± 2.6(stat.)±2.1(sys.)MeV,which can be interpreted as the predicted Θ+(uudd)pentaquark baryon state. The absence of peak structure in K+p invariant mass spectrum implies that the state is very likely a isosinglet state.
  • 加载中
  • [1] .Gell-Mann M. Phys. Lett . , 1964, 8: 2142. Jaffe R L. Oxford Top Conf . , July 1976. 4553. Lipkin H J. Phys. Lett . , 1987, B195: 484; Gignoux C, Silvestre-Brac B,Richard J M. Phys. Lett. , 1987, B193: 3234. Moinest er M A, Ashery D,Landsberg L G et al. Z. Phys. , 1996, A356:2075. Manohar A. Nucl. Phys. , 1984, B248: 19; Chemtob M. Nucl. Phys. ,1985, B256: 6006. Walliser H Z. Z. Phys. , 1992, A548: 6497. Diakonov D,Petrov V,Polyakov M. Z. Phys. , 1997, A359: 3058. Praszalowicz M. Workshop on Skyrmions and Anoma-lies, World Scientic, 1987, 112; Phys. Lett . , 2003, B575: 2349. GAO H Y,MA B Q. Mod. Phys. Lett . , 1999, A14: 231310. Nakano T et al . Phys. Rev. Lett. , 2003, 91: 01200211. DIANA Collaboration, Barmin V V et al. Phys. Atom. Nucl. , 2003,66: 1715; Yad Fiz 66, 2003, 176312. CLAS Collaboration, Stepanyan S et al . Phys. Rev. Lett. , 2003, 91:25200113. SAPHIR Collaboration, Barth J et al . Phys. Lett . , 2003, B572: 127 !13214. HERMES Collaboration, Ackerstaff K et al . Nucl. Instr. Meth. , 1998,A417: 23015. Akopove N et al. Nucl. Instr. Meth. , 2002, A479: 51116. Particle Data Group,Hagiwara K et al. Phys. Rev. , 2002, D66: 01000117. HERMES Collaboration, Airapetian A et al. hep-et al. 0312044, acceptedby Phys. Lett. B
  • 加载中

Get Citation
MAO Ya-Jun. Search for the Pentaquark at the HERMES[J]. Chinese Physics C, 2004, 28(12): 1332-1335.
MAO Ya-Jun. Search for the Pentaquark at the HERMES[J]. Chinese Physics C, 2004, 28(12): 1332-1335. shu
Milestone
Received: 2003-11-29
Revised: 1900-01-01
Article Metric

Article Views(2668)
PDF Downloads(689)
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:

Search for the Pentaquark at the HERMES

    Corresponding author: MAO Ya-Jun,
  • Department of Technical Physics,School of Physics,Peking University,Beijing 100871,China

Abstract: Evidence for a narrow baryon state is found in quasi–real photo–production on a deuterium target through the decay channel K0sp→π+π–p. A peak is found in K0sp invariant mass spectrum at 1528± 2.6(stat.)±2.1(sys.)MeV,which can be interpreted as the predicted Θ+(uudd)pentaquark baryon state. The absence of peak structure in K+p invariant mass spectrum implies that the state is very likely a isosinglet state.

    HTML

Reference (1)

目录

/

DownLoad:  Full-Size Img  PowerPoint
Return
Return