Impact factor of Chinese Physics C is 3.6 in 2023 Impact factor of Chinese Physics C is 3.6 in 2022 2021 Impact Factor 2.944
Advanced Search
Chinese Physics C> 1995, Vol. 19> Issue(5) : 385-392 

Study of the Decay τ±→π+π-π±υτ at s=4.03 GeV

  •  Institute of High Energy Physics, Academia Sinica, Beijing 100039

  • The τ+τ－ production has been studied in the data acquired by the Beijing Spectrometer (BES) at the comer-of-mass energy 4.03 GeV. Using a double-tagging technique, the decay τ~±→π~+π~-π~±υ_τhas been investigated. The branching ratios are determined to be Br(τ~±→a_1~±υ_τ→ρ~0π~±υ_τ, ρ~0→π~+π~-) = (7.3±0.5) % and Br(τ~±→ K~*±υτ→K_s~0π~±υτ, K_s~0→π~+π~-) = (6.0 ±1.5) ×10~(-3). From the Dalitz projection distribution, the dominant decay mode of ρπ in a~1 decay has been observed. Meanwhile,we have also found that the S-wave contribution dominates the a_1 decay. Applying the Kuhn model to fit the data, we have obtained the a_1 resonance parameters of m_a1=1.24±0.02 GeV and Γ_a1=0.57±0.07 GeV.
  • 加载中

  • References

    [1] ParticleDataGroup,Phys.Rev.,D45;（1992）.[2]BESCollaboration,Nucl.Instr. Meth.in Phys.Res,A344（994）319.[3]陈少敏，Thevτ Mass and Helicity Measurementat BES,第二届BES年会，北京，1993年7月。[4]J.H.Kuhn,F.Wagner,Nucl.Phys,B236（1984）16.[5]S.Jadach,Z.Was,Comp.Phys.Commun.,36（1985）191.S.Jadach,J.H.Kuhn.Z.Was,Comp.PhysCommun.,64（1990）275.S.Jadach,B.F.L.Ward,Z.Was,Comp Phys.Commun.66（1991）276.[6]B.Andersonetal.,Phys.Rep,97（1983）31;Phy.Letts.,B199（1987）191.[7]E.Eichtenletal,Phys.RevLett,36（1976）132.[8]郑志鹏，漆纳丁，北京谱仪最新物理结果，第一届北极圈加速器和物理的未来发展讨论会会刊，芬兰，萨里塞卡，1994年8月。[9]童国梁，李勇等，Measurement of the BRof Decayτ-→a1-vτ（π+π-π-）,第三届BES年会，杭州，1994年7月。[10]J.H.Kuhn,A.Santamaria;Z.Phys,C48（1990）445.

  • Access

    加载中

Get Citation
BES collaboration. Study of the Decay τ±→π+π-π±υτ at s=4.03 GeV[J]. Chinese Physics C, 1995, 19(5): 385-392.
BES collaboration. Study of the Decay τ±→π+π-π±υτ at s=4.03 GeV[J]. Chinese Physics C, 1995, 19(5): 385-392. shu
Milestone
Received: 1900-01-01
Revised: 1900-01-01
Article Metric

Article Views(4120)
PDF Downloads(480)
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:

Study of the Decay τ±→π+π-π±υτ at s=4.03 GeV

  • Institute of High Energy Physics, Academia Sinica, Beijing 100039
  • Received Date: 1900-01-01
  • Accepted Date: 1900-01-01
  • Available Online: 1995-05-05

Abstract: The τ+τ－ production has been studied in the data acquired by the Beijing Spectrometer (BES) at the comer-of-mass energy 4.03 GeV. Using a double-tagging technique, the decay τ~±→π~+π~-π~±υ_τhas been investigated. The branching ratios are determined to be Br(τ~±→a_1~±υ_τ→ρ~0π~±υ_τ, ρ~0→π~+π~-) = (7.3±0.5) % and Br(τ~±→ K~*±υτ→K_s~0π~±υτ, K_s~0→π~+π~-) = (6.0 ±1.5) ×10~(-3). From the Dalitz projection distribution, the dominant decay mode of ρπ in a~1 decay has been observed. Meanwhile,we have also found that the S-wave contribution dominates the a_1 decay. Applying the Kuhn model to fit the data, we have obtained the a_1 resonance parameters of m_a1=1.24±0.02 GeV and Γ_a1=0.57±0.07 GeV.

    HTML

Reference (1)

目录

Link
IOPScience
SCOAP3
arXiv
Chinese Physical Society
Journal information
Introduction
Editorial Board
Others
Subscribe
Contact us
QQ: 1307685413
Tel: +86-010-88235947
Fax: +86-010-88233126
E-mail: cpc@ihep.ac.cn

  • CPC Website

  • IOP Website

  • CPC WeChat

Copyright © Institute of High Energy Physics, Chinese Academy of Sciences, 19B Yuquan Road, Beijing 100049, China 京ICP备05002789号-1

Supported by: Beijing Renhe Information Technology Co. Ltd  E-mail: info@rhhz.net

/

DownLoad:  Full-Size Img  PowerPoint
Return
Return