Measurement of the τ Polarization Asymmetry in τ→a1 v→π±π0π0v Decay at Z0 Peak

Liu Zhenan; Chen Guoming; Chen Hesheng; Tang Xiaowei

近期发现有不法分子冒充我刊与作者联系，借此进行欺诈等不法行为，请广大作者加以鉴别，如遇诈骗行为，请第一时间与我刊编辑部联系确认（《中国物理C》（英文）编辑部电话：010-88235947,010-88236950），并作报警处理。

本刊再次郑重声明：

（1）本刊官方网址为cpc.ihep.ac.cn和https://iopscience.iop.org/journal/1674-1137

（2）本刊采编系统作者中心是投稿的唯一路径，该系统为ScholarOne远程稿件采编系统，仅在本刊投稿网网址（https://mc03.manuscriptcentral.com/cpc）设有登录入口。本刊不接受其他方式的投稿，如打印稿投稿、E-mail信箱投稿等，若以此种方式接收投稿均为假冒。

（3）所有投稿均需经过严格的同行评议、编辑加工后方可发表，本刊不存在所谓的“编辑部内部征稿”。如果有人以“编辑部内部人员”名义帮助作者发稿，并收取发表费用，均为假冒。

《中国物理C》（英文）编辑部

2024年10月30日

Chinese Physics C> 1998, Vol. 22> Issue(11) : 990-995

Measurement of the τ Polarization Asymmetry in τ→a₁ v→π^±π⁰π⁰v Decay at Z⁰ Peak

Institute of High Energy Physics. CAS, Beijing 100039

Abstract
HTML
Reference
Related

PDF

Abstract：
The τ polarization asymmetry in τ→a₁v→π^±π⁰ π⁰v decay at Z⁰ peak is measured using data collected by L3 detector at LEP in 1992 and 1993, A_pol=－0.239±0.126±0.100, where the first error is statistical and the second systematic. And the effective electroweak mixing angle sin²θ_w=0.2197±0.0219 is derived.

References

[1]	L3 Collab, Nucl. Instr. and Meth, 1990, A289:35 [2] Chen Guoming, Chen Gang. High Energy Phys. and Nuclear Phys. (in Chinese), 1995, 19:692(陈国明,陈刚,高能物理与核物理,1995, 19:692) [3] Rouge A Z. Phys., 1990, C48:75[4] Rouge A.TAU LEPTON PHYSICS,Orsay,France,Septembetr, 18—22,1990

[1]	K. I. Beloborodov , A. V. Berdyugin , A. A. Botov , V. B. Golubev , T. V. Dimova , V. P. Druzhinin , A. G. Kharlamov , D. P. Kovrizhin , I. A. Koop , A. A. Korol , S. V. Koshuba , A. E. Obrazovsky , E. V. Pakhtusova , D. A. Shtol , S. I. Serednyakov , Z. K. Silagadze , A. N. Skrinsky , Yu. A. Tikhonov , Yu. M. Shatunov , A. V. Vasil'ev . Study of the process e⁺e^－→π⁺π^－π⁰π⁰ at energies √s<1 GeV. Chinese Physics C, 2010, 34(6): 680-685. doi: 10.1088/1674-1137/34/6/012
[2]	WANG Shuai-Wei , HUANG Jin-Shu , SONG Tai-Ping , LU Gong-Ru . Simultaneous Solution to B_d⁰→φK^*0 Polarization Anomaly and B_d→φK_S CP Asymmetry. Chinese Physics C, 2007, 31(10): 900-906.
[3]	DAI Lian-Rong , FU Yao , LIU Zhong-Zuo , WANG Yin , TONG Lei , LI Chun-Ran . Structure of Ξ^*Ω_(0,1/2) Dibaryon. Chinese Physics C, 2006, 30(S2): 271-273.
[4]	LIU Zhen-An . Z⁰ Data Analysis in L3 Cosmic-Ray Experiment. Chinese Physics C, 2003, 27(5): 395-398.
[5]	SHAO Feng-Lan , XIE Qu-Bing , LI Shi-Yuan . Sensitive Observables for Color Connections in Three-Jet Events at Z⁰ Pole. Chinese Physics C, 2003, 27(6): 479-483.
[6]	BES Callaboration . Decay of the J/ψ to Σ⁰Σ⁰ Final State. Chinese Physics C, 2002, 26(2): 93-99.
[7]	Yao Xueyi , Chen Guoming , Chen Gang , Chen Hesheng , Tang Xiaowei . Measurement of Structure Function of τ→π^±2π⁰v. Chinese Physics C, 1999, 23(1): 10-16.
[8]	BES Collaboration . Measurements of the Branching Ratios for the Decays J/ψ→γπ⁰,γη, γη'→ 3γ at BES. Chinese Physics C, 1997, 21(5): 385-392.
[9]	BES Collaboration . Measurement of the Branching Ratios of τ^±→π^±+nπ⁰+ν_τ(n=0,1,2) decays. Chinese Physics C, 1997, 21(3): 193-200.
[10]	Zhu Guohuai . Reestimate for CP Asymmetries in Decays of Neutral B-Flavored Mesons. Chinese Physics C, 1996, 20(10): 913-918.
[11]	LI Tie-Zhong . The Relation of Family and Extra Z⁰ Boson Number. Chinese Physics C, 1992, 16(1): 15-21.
[12]	JIN Bing-Nian , XU Ya-Di . Z⁰ Line Shape Fit. Chinese Physics C, 1992, 16(3): 197-201.
[13]	ZHANG Zhao-Xi , CHEN Yu-Qi . The Production of B_c⁽B_c) Meson Through Z⁰ Boson Decay. Chinese Physics C, 1992, 16(4): 335-339.
[14]	Jin Bingnian , Xu Yadi . Z⁰ Line Shape Fit. Chinese Physics C, 1992, 16(S1): 11-16.
[15]	LI Tie-Zhong . One Plan of Identifying Various Extra z⁰ Bosons Models. Chinese Physics C, 1991, 15(9): 804-811.
[16]	Li Tiezhong . A Scheme for Identifying Various Extra z⁰ Boson Models. Chinese Physics C, 1991, 15(S3): 273-281.
[17]	PAN Ling-Jun , JIANG Huan-Qing . ASYMMETRY FOR π⁺ SINGLE CHARGE EXCHANGE FROM ALIGNED NUCLEUS ¹⁶⁵Ho. Chinese Physics C, 1989, 13(7): 614-619.
[18]	LI Tie-Zhong . EXTRA Z⁰ BOSONS AND THE DIFFICULTY OF PROTON DECAY. Chinese Physics C, 1988, 12(4): 484-492.
[19]	LIN Jin-Hu , ZHENG Zhe-Zhu . THE HADRON 1→0 DECAY PROCESSESIN A 3+1 DIMENSIONAL THEORY. Chinese Physics C, 1986, 10(2): 153-157.
[20]	LIU Yao-Yang . RADIATIVE DECAY OF Z⁰ AND HEAVY LEPTON. Chinese Physics C, 1985, 9(4): 505-507.

Access

Get Citation

Liu Zhenan, Chen Guoming, Chen Hesheng and Tang Xiaowei. Measurement of the τ Polarization Asymmetry in τ→a₁ v→π^±π⁰π⁰v Decay at Z⁰ Peak[J]. Chinese Physics C, 1998, 22(11): 990-995.

RIS(for EndNote,Reference Manager,ProCite)

BibTex

Txt

Milestone

Received: 1997-12-02
Revised: 1900-01-01

Article Metric

Article Views(2683)
PDF Downloads(555)
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

Measurement of the τ Polarization Asymmetry in τ→a₁ v→π^±π⁰π⁰v Decay at Z⁰ Peak

Corresponding author: Liu Zhenan,

Institute of High Energy Physics. CAS, Beijing 100039

Received Date: 1997-12-02
Accepted Date: 1900-01-01
Available Online: 1998-11-05

Abstract: The τ polarization asymmetry in τ→a₁v→π^±π⁰ π⁰v decay at Z⁰ peak is measured using data collected by L3 detector at LEP in 1992 and 1993, A_pol=－0.239±0.126±0.100, where the first error is statistical and the second systematic. And the effective electroweak mixing angle sin²θ_w=0.2197±0.0219 is derived.