ΛΛ,ΛΛγ and ΛΛπ<SUP>0</SUP> Productions in J/ψ Decay

BES Collaboration

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(2) : 97-105

ΛΛ,ΛΛγ and ΛΛπ⁰ Productions in J/ψ Decay

BES Collaboration

Institute of High Energy Physics,The Chinese Academy of Sciences,Beijing 100039

Abstract
HTML
Reference
Related

PDF

Abstract：
The channels of J/ψ decay into,ΛΛ,ΛΛγ and ΛΛπ⁰ are analyzed with 7.8×10⁶ J/ψ events collected by BES detector at BEPC Collider.The branching ratios for three channels and the angular distribution for the first channel are measured.The branching ratios are Br(J/ψ→ΛΛ)=(l.08±0.06±0.24)×10^－3,Br(J/ψ→ΛΛγ)－4(90% CL)and Br(J/ψ→ΛΛπ⁰)=(2.3±0.7±0.8)×l0^－4 respectively. The angular distribution for J/ψ→ΛΛ is dN dcosθ=N₀(1+αcos²0),α=0.52±0.33±0.13.

References

[1]

Brodsky S L, Lepage G P. Phys. Rev., 1981, D24:2848[2] Claudson M, Giashow S L, Wise M B. Phys. Rev., 1982, D25: 1345[3] Carimalo C. Int J. Mod. Phys., 1987, A2:249[4] Peruzzi I et al. Phys. Rev., 1978, D17:2901[5] Eaton M W et al. Phys. Rev., 1984, D29:804[6] Pallin D et al. Nucl. Phys., 1987, B292:653

[1]	CHEN Jun-Xiao , HOU Zhao-Yu , LI Ying , . Branching ratio of rare decay B⁰(B_s)→γνν. Chinese Physics C, 2006, 30(4): 289-293.
[2]	WU Xiang-Yao , LIU Xiao-Jing , GONG Pi-Feng , LI Qi-Lang , SHI Zong-Hua , GUO Yi-Qing . Study of D⁰→π^－l⁺ν_l Decay. Chinese Physics C, 2006, 30(11): 1048-1052.
[3]	PING Rong-Gang , YUAN Chang-Zheng . Baryon Resonance in χ_c0→BBMM Decays. Chinese Physics C, 2006, 30(8): 731-735.
[4]	LU GoNG-Ru , WANG Ru-Min , YANG Ya-Dong . Analysis of the Annihilation Decays B0s,d→J/ψ γ with QCD Factorization. Chinese Physics C, 2005, 29(3): 232-236.
[5]	WU Xiang-Yao , CAO Xue-Lei , YIN Xin-Guo . Nonfactorization in D⁺→K⁰K⁺ Decays. Chinese Physics C, 2004, 28(2): 129-133.
[6]	. Study of Exclusive Hadronic Decays for D0→Ks0π+π- and D0→Ks0K+K- and Their Resonant Structures. Chinese Physics C, 2004, 28(1): 1-10.
[7]	LIU Fang , LI Jin , HUANG Yi-Bin , YAN Mu-Lin . ρ-ω Interference in J/ψ-Decays and ρ→ππ^-π⁰ Decay. Chinese Physics C, 2004, 28(3): 239-244.
[8]	LI Ying , LU Cai-Dian . Calculation of Rare Decay B⁺→D⁺_sK^*0 in Perturbative QCD Approach. Chinese Physics C, 2003, 27(12): 1062-1066.
[9]	BES Callaboration . Decay of the J/ψ to Σ⁰Σ⁰ Final State. Chinese Physics C, 2002, 26(2): 93-99.
[10]	Liu Zhenan , Chen Guoming , Chen Hesheng , Tang Xiaowei . Measurement of the τ Polarization Asymmetry in τ→a₁ v→π^±π⁰π⁰v Decay at Z⁰ Peak. Chinese Physics C, 1998, 22(11): 990-995.
[11]	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.
[12]	BES Collaboration . Experimental Study of f₀ (975) in the J/ψ Decays. Chinese Physics C, 1995, 19(4): 289-295.
[13]	LIU Liang-Gang . ρ⁰-ω Mixing Effect in the (ρ⁰,ω)→e⁺e^－ Pair Decay. Chinese Physics C, 1993, 17(7): 614-618.
[14]	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.
[15]	DU Dong-Sheng , XING Zhi-Zhong . CP-Violating Effects in Two-Body Baryonic Decays of B⁰－B⁰ System. Chinese Physics C, 1992, 16(5): 398-407.
[16]	SONG Xiao-Tong , DAI You-Shan . THE COULOMB DISINTEGRATION CROSS-SECTION AND DECAY RATE OF THE SPIN (0－3/2) ELECTROMAGNETIC BOUND SYSTEM. Chinese Physics C, 1987, 11(1): 24-31.
[17]	HUANG Tao , XIE Yi-Cheng . A PHYSICAL CONSEQUENCE OF THE GAUGE INVARIANCE IN THE PROCESS π⁰→γγ. Chinese Physics C, 1985, 9(4): 437-441.
[18]	LIU Yao-Yang . RADIATIVE DECAY OF Z⁰ AND HEAVY LEPTON. Chinese Physics C, 1985, 9(4): 505-507.
[19]	LI Bing-An . DECAY π⁰→2γ IN THE MIT BAG MODEL. Chinese Physics C, 1984, 8(3): 279-284.
[20]	MA ZHONG-QI , DONG FANG-XIAO , YUE ZONG-WU , ZHOU XIAN-JIAN , XUE PEI-YOU . D⁰-MESON DECAYS Γ（D⁰→K⁺K^-）/Γ（D⁰→π⁺π^-）. Chinese Physics C, 1981, 5(1): 130-133.

Access

Get Citation

BES Collaboration. ΛΛ,ΛΛγ and ΛΛπ⁰ Productions in J/ψ Decay[J]. Chinese Physics C, 1998, 22(2): 97-105.

BES Collaboration. ΛΛ,ΛΛγ and ΛΛπ⁰ Productions in J/ψ Decay[J]. Chinese Physics C, 1998, 22(2): 97-105. shu

RIS(for EndNote,Reference Manager,ProCite)

BibTex

Txt

Milestone

Received: 1900-01-01
Revised: 1900-01-01

Article Metric

Article Views(4005)
PDF Downloads(616)
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

ΛΛ,ΛΛγ and ΛΛπ⁰ Productions in J/ψ Decay

BES Collaboration

Institute of High Energy Physics,The Chinese Academy of Sciences,Beijing 100039

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

Abstract: The channels of J/ψ decay into,ΛΛ,ΛΛγ and ΛΛπ⁰ are analyzed with 7.8×10⁶ J/ψ events collected by BES detector at BEPC Collider.The branching ratios for three channels and the angular distribution for the first channel are measured.The branching ratios are Br(J/ψ→ΛΛ)=(l.08±0.06±0.24)×10^－3,Br(J/ψ→ΛΛγ)－4(90% CL)and Br(J/ψ→ΛΛπ⁰)=(2.3±0.7±0.8)×l0^－4 respectively. The angular distribution for J/ψ→ΛΛ is dN dcosθ=N₀(1+αcos²0),α=0.52±0.33±0.13.