Measurement of J/ψ decays into ΛΛ π<SUP>+</SUP>π<SUP>-</SUP>

M. Ablikim et al (BESⅡ collaboration)

doi:10.1088/1674-1137/36/11/001

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> 2012, Vol. 36> Issue(11) : 1031-1039 DOI: 10.1088/1674-1137/36/11/001

Measurement of J/ψ decays into ΛΛ π⁺π^-

M. Ablikim et al (BESⅡ collaboration)

Institute of High Energy Physics, Beijing 100049, China

Abstract
HTML
Reference
Related

PDF

Abstract：
Based on 58 million J/ψ events collected by the BESⅡ detector at the BEPC, J/ψ→ΛΛ π⁺π^- is observed for the first time. The branching fraction is measured to be Br(J/ψ→ΛΛ π⁺π^-)=(4.30±0.13±0.99)×10^-3, excluding the decays to intermediate states, namely J/ψ→Ξ^-Ξ⁺, J/ψ→Σ(1385)^-Σ(1385)⁺, and J/ψ→Σ(1385)⁺Σ(1385)^-. The branching fractions for these intermediate resonance channels are measured to be:Br(J/ψ→Ξ^-Ξ⁺)=（0.90±0.03±0.18）×10^-3, Br(J/ψ→Σ(1385)^-Σ(1385)⁺)=(1.23±0.07±0.30)×10^-3,and Br(J/ψ→Σ(1385)⁺Σ(1385)^-)=(1.50±0.08±0.38)×10^-3, respectively. The angular distribution is of the form dN/d(cosθ)α(1+αcos²θ) with α=(0.35±0.29±0.06) for J/ψ→Ξ^-Ξ⁺, α=(-0.54±0.22±0.10) for J/ψ→Σ(1385)^-Σ(1385)⁺, and α=(-0.35±0.29±0.06) for J/ψ→Σ(1385)⁺Σ(1385)^-.

References

[1]

Eaton M W et al. Phys. Rev. D, 1984, 29: 804[2] Henrard P et al. Nucl. Phys. B, 1987, 292: 670-692[3] Abilkim M et al. (BES collaboration). Phys. Lett. B, 2006, 632: 181-186[4] Herber H E, Perrier J. Phys. Rev. D, 1985, 32: 2961[5] BAI J Z et al. (BES collaboration). Phys. Lett. B, 2004, 591: 42[6] Ablikim M et al. (BES collaboration). Phys. Lett. B, 2007, 648: 149[7] CHEN Hong, PING R G. Phys. Lett. B, 2007, 644: 54-58[8] Carimalo C. Int. J. Mod. Phys. A, 1987, 2: 249[9] BAI J Z et al. (BES collaboration). Nucl. Instrum. Methods A, 1994, 344: 319[10] BAI J Z et al. (BES collaboration). Nucl. Instrum. Methods A, 2001, 458: 627[11] Ablikim M et al. (BES collaboration). Nucl. Instrum. Methods A, 2005, 552: 344[12] YAO W M et al. (Particle Data Group). Journal of Physics G, 2012, 33: 1 (on the web)[13] FANG S S et al. High Energy Phys. and Nucl. Phys., 2003, 27: 277 (in Chinese)

[1]	I. I. Bigi , Xian-Wei Kang , Hai-Bo Li . CP asymmetries in Strange Baryon Decays. Chinese Physics C, 2018, 42(1): 013101. doi: 10.1088/1674-1137/42/1/013101
[2]	Y. K. Hsiao , Chao-Qiang Geng . Branching fractions of B_(c) decays involving J/ψ and X(3872). Chinese Physics C, 2017, 41(1): 013101. doi: 10.1088/1674-1137/41/1/013101
[3]	Liang Zhang , Peng-Zhi Huang . ρ meson decays of heavy hybrid mesons. Chinese Physics C, 2016, 40(7): 073105. doi: 10.1088/1674-1137/40/7/073105
[4]	WANG Dong , BAN Yong , LI Gang . ρ-ω mixing in J/ø→VP decays. Chinese Physics C, 2014, 38(6): 063101. doi: 10.1088/1674-1137/38/6/063101
[5]	MU Chun , WANG Xiao , CHEN Xiao-Lin , LIU Xiang , ZHU Shi-Lin . Dipion decays of heavy baryons. Chinese Physics C, 2014, 38(11): 113101. doi: 10.1088/1674-1137/38/11/113101
[6]	HUANG Jin-Shu , SUN Jun-Feng , LU Gong-Ru , LI Hai-Bo . Properties of the coupling constants of J/ψ→VP decays. Chinese Physics C, 2013, 37(7): 073103. doi: 10.1088/1674-1137/37/7/073103
[7]	Bhaghyesh , K. B. Vijaya Kumar , Antony Prakash Monteiro . Heavy quarkonia spectra and their decays in a relativistic quark model. Chinese Physics C, 2011, 35(11): 997-1003. doi: 10.1088/1674-1137/35/11/003
[8]	WANG Bo-Qun , MO Xiao-Hu , WANG Ping , BAN Yong . Fast computation of observed cross section for ψ'→PP decays. Chinese Physics C, 2011, 35(5): 411-418. doi: 10.1088/1674-1137/35/5/001
[9]	JIN Dan , YANG Ya-Dong . Radiative decays J/ψ → η^(')γ in perturbative QCD. Chinese Physics C, 2011, 35(8): 703-707. doi: 10.1088/1674-1137/35/8/001
[10]	LI Gang , ZHANG Yuan-Jiang , ZHAO Qiang , ZOU Bing-Song . Isospin violating mechanisms in quarkonium hadronic decays. Chinese Physics C, 2010, 34(6): 842-847. doi: 10.1088/1674-1137/34/6/037
[11]	ZHANG Yuan-Jiang , LI Gang , ZHAO Qiang . Manifestation of intermediate meson loop effects in charmonium decays. Chinese Physics C, 2010, 34(9): 1181-1184. doi: 10.1088/1674-1137/34/9/006
[12]	ZHAO Li , ZHANG Zi-Ping (for the Belle collaboration) . D⁰-D⁰ mixing and other charm decays at Belle. Chinese Physics C, 2010, 34(6): 774-779. doi: 10.1088/1674-1137/34/6/027
[13]	LI Rong , HE Zhi-Guo . J/ψ inclusive production in χ_bJ(nP) decays. Chinese Physics C, 2010, 34(7): 929-936. doi: 10.1088/1674-1137/34/7/001
[14]	M. Bischofberger (for the Belle collaboration) . Rare decays of the tau lepton at Belle. Chinese Physics C, 2010, 34(6): 902-906. doi: 10.1088/1674-1137/34/6/048
[15]	SUN Liang (for the BABAR collaboration) . Search for new physics in the B→K^(*)l⁺l^－ decays at BABAR. Chinese Physics C, 2010, 34(9): 1504-1507. doi: 10.1088/1674-1137/34/9/085
[16]	G. D. Lafferty . Rare tau decays from BABAR. Chinese Physics C, 2010, 34(6): 907-911. doi: 10.1088/1674-1137/34/6/049
[17]	S. Eidelman¹ , 2 . τ lepton decays. Chinese Physics C, 2010, 34(6): 896-901. doi: 10.1088/1674-1137/34/6/047
[18]	BES Collaboration . Experiment Study of f₀(975) in J/ψ Decays. Chinese Physics C, 1995, 19(S2): 125-131.
[19]	Yu Hong , Shen Qixing , Zhu Yucan , Zheng Zhipeng , Cheng Zhengdong . Studies of the θ(1720) Wide Resonance in J/ψ Hadronic Decays. Chinese Physics C, 1993, 17(S2): 143-146.
[20]	Tian Lili , Xie Qubing . Strong γ Decays Via Three Gluons. Chinese Physics C, 1993, 17(S3): 239-247.

Access

Get Citation

M. Ablikim et al (BESⅡ collaboration). Measurement of J/ψ decays into ΛΛ π⁺π^-[J]. Chinese Physics C, 2012, 36(11): 1031-1039. doi: 10.1088/1674-1137/36/11/001

M. Ablikim et al (BESⅡ collaboration). Measurement of J/ψ decays into ΛΛ π⁺π^-[J]. Chinese Physics C, 2012, 36(11): 1031-1039. doi: 10.1088/1674-1137/36/11/001 shu

RIS(for EndNote,Reference Manager,ProCite)

BibTex

Txt

Milestone

Received: 2012-07-16
Revised: 2012-08-16

Article Metric

Article Views(2202)
PDF Downloads(394)
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 J/ψ decays into ΛΛ π⁺π^-

M. Ablikim et al (BESⅡ collaboration)

Institute of High Energy Physics, Beijing 100049, China

Received Date: 2012-07-16
Accepted Date: 2012-08-16
Available Online: 2012-11-05

Abstract: Based on 58 million J/ψ events collected by the BESⅡ detector at the BEPC, J/ψ→ΛΛ π⁺π^- is observed for the first time. The branching fraction is measured to be Br(J/ψ→ΛΛ π⁺π^-)=(4.30±0.13±0.99)×10^-3, excluding the decays to intermediate states, namely J/ψ→Ξ^-Ξ⁺, J/ψ→Σ(1385)^-Σ(1385)⁺, and J/ψ→Σ(1385)⁺Σ(1385)^-. The branching fractions for these intermediate resonance channels are measured to be:Br(J/ψ→Ξ^-Ξ⁺)=（0.90±0.03±0.18）×10^-3, Br(J/ψ→Σ(1385)^-Σ(1385)⁺)=(1.23±0.07±0.30)×10^-3,and Br(J/ψ→Σ(1385)⁺Σ(1385)^-)=(1.50±0.08±0.38)×10^-3, respectively. The angular distribution is of the form dN/d(cosθ)α(1+αcos²θ) with α=(0.35±0.29±0.06) for J/ψ→Ξ^-Ξ⁺, α=(-0.54±0.22±0.10) for J/ψ→Σ(1385)^-Σ(1385)⁺, and α=(-0.35±0.29±0.06) for J/ψ→Σ(1385)⁺Σ(1385)^-.