First evidence of ψ(2S)→Ω-Ω+

M. Ablikim et al (BESⅡ collaboration)

doi:10.1088/1674-1137/36/11/002

Chinese Physics C> 2012, Vol. 36> Issue(11) : 1040-1045 DOI: 10.1088/1674-1137/36/11/002

First evidence of ψ(2S)→Ω^-Ω⁺

M. Ablikim et al (BESⅡ collaboration)

Institute of High Energy Physics, Beijing 100049, China

Abstract
HTML
Reference
Related

PDF

Abstract：
The decay ψ(2S)→Ω^-Ω⁺ is analyzed using 14×10⁶ ψ(2S) events recorded by the Beijing Spectrometer Ⅱ (BESⅡ) at the Beijing Electron Positron Collider (BEPC). Based upon events with no missing charged tracks and a satisfactory four-constraint kinematic t, we determine the upper limit for the branching fraction of ψ(2S)→Ω^-Ω⁺ to be 1.5×10⁴ at a 90% confidence level. By including events with one missing charged track, we are able to report the first evidence of an Ω⁺ signal with a statistical signi cance of 3.1|σ. The branching fraction of ψ(2S)Ω⁺ is determined to be (4.80±1.56(stat)±1.30(sys))10⁵.

References

[1]

Farrar G R, Jackson R D. Phys. Rev. Lett., 1975,35: 1416; Ioffe B L. Phys. Lett. B, 1976, 63: 425; Vainshtein A I, Zakharov V I. Phys. Lett. B, 1978, 72: 368; Brodsky S J, Lepage G P. Phys. Rev. D, 1981, 24: 2848[2] Bolz J. Kroll P. Eur. Phys. J. C, 1998, 2: 545-556[3] BAI J Z et al. (BES collaboration). Phys. Rev. D, 2001, 63: 032002[4] Pedlar T K et al. (CLEO collaboration). Phys. Rev. D, 2005, 72: 051108[5] BAI J Z et al. (BES collaboration). Nucl. Instrum. Methods A, 2001, 458: 627[6] Ablikim M et al. (BES collaboration). Nucl. Instrum. Methods A, 2005, 552: 344[7] Beringer J et al. (Particle Data Group). Phys. Rev. D, 2012, 86: 010001 (web edition: accessed on July 09, 2012)[8] Ablikim M et al. (BES collaboration). Phys. Rev. D, 2004, 70: 092002[9] Bityukov S I, Krasnikov N V. Nucl. Instrum. Methods A, 2003, 502: 795-798[10] Ablikim M et al. (BES collaboration). Phys. Lett. B, 2007, 648: 149-155

[1]	Zhi-Gang Wang , Hui-Juan Wang . Analysis of the 1S and 2S states of Λ_Q and Ξ_Q with QCD sum rules. Chinese Physics C, 2021, 45(1): 013109. doi: 10.1088/1674-1137/abc1d3
[2]	Xi-Jie Zhan , Jian-Xiong Wang . Inclusive $ {{\Upsilon(1S,2S,3S)}}$ photoproduction at the CEPC. Chinese Physics C, 2021, 45(2): 023112. doi: 10.1088/1674-1137/abce11
[3]	M. Alekseev , A. Amoroso , R. Baldini Ferroli , I. Balossino , M. Bertani , D. Bettoni , F. Bianchi , J. Chai , G. Cibinetto , F. Cossio , F. De Mori , M. Destefanis , R. Farinelli , L. Fava , G. Felici , I. Garzia , M. Greco , L. Lavezzi , C. Leng , M. Maggiora , A. Mangoni , S. Marcello , G. Mezzadri , S. Pacetti , P. Patteri , A. Rivetti , M. Da Rocha Rolo , M. Savrié , S. Sosio , S. Spataro , L. Yan . A model to explain the angular distribution of $ {{{J /\psi}}} $ and $ {{\psi(2S)}} $ decay into $ {\Lambda \overline{\Lambda}} $ and ${\Sigma^0 \overline{\Sigma^0}} $. Chinese Physics C, 2019, 43(2): 023103. doi: 10.1088/1674-1137/43/2/023103
[4]	Ai-Jun Ma , Ya Li , Wen-Fei Wang , Zhen-Jun Xiao . S-wave resonance contributions to B_(s)⁰→η_c(2S)π⁺π^-in the perturbative QCD factorization approach. Chinese Physics C, 2017, 41(8): 083105. doi: 10.1088/1674-1137/41/8/083105
[5]	M. Ablikim , M. N. Achasov , X. C. Ai , et al. (BESⅢ collaboration) . Evidence for e⁺e^-→γχ_c1,2 at center-of-mass energies from 4.009 to 4.360 GeV. Chinese Physics C, 2015, 39(4): 041001. doi: 10.1088/1674-1137/39/4/041001
[6]	WANG Zai-Jun , REN Zhong-Zhou , DONG Tie-Kuang . Probe the 2s_1/2 and 1d_3/2 state level inversion with electron-nucleus scattering. Chinese Physics C, 2014, 38(2): 024102. doi: 10.1088/1674-1137/38/2/024102
[7]	WU Jia-Jun , ZOU Bing-Song . Evidence for a new resonance Σ^(1380) with J^P*=1/2^－. Chinese Physics C, 2010, 34(9): 1508-1511. doi: 10.1088/1674-1137/34/9/086
[8]	WEI Dai-Hui , YANG Yong-Xu . Pseudoscalar mixing in J/ψ and ψ(2S) decay. Chinese Physics C, 2010, 34(12): 1785-1790. doi: 10.1088/1674-1137/34/12/002
[9]	JIANG Xing-Yu , FANG Shuang-Shi , ZHU Yu-Can , LU Gong-Ru . Pseudoscalar-Meson Mixing in ψ(2S)→VP Decays. Chinese Physics C, 2006, 30(8): 724-730.
[10]	QIAN Hai-Jie , SU Run , WANG Jia-Ou , WU Xiang , DONG Yu-Hui , WU Zi-Yu , WANG Yu-Tian , WEI Long , , . O 1s2p2p Auger Process Investigation of the Pr_1-x Sr_x MnO₃ System. Chinese Physics C, 2003, 27(S1): 40-44.
[11]	WANG Ping , YUAN Chang-Zheng , MO Xiao-Hu . Contribution of One-Photon Annihilation at ψ(2S) in e⁺e^－ Experiment. Chinese Physics C, 2003, 27(6): 465-473.
[12]	FU Cheng-Dong , MO Xiao-Hu , ZHANG Jia-Wen , ZHU Yong-Sheng , YUAN Chang-Zheng , DONG Xin , DONG Liao-Yuan . Fast Reconstruction of ψ(2S) Data and Corresponding Quality Supervision. Chinese Physics C, 2003, 27(8): 653-658.
[13]	BES Collaboration . Abnormal Suppression of Vector-Tensor Decays of ψ(2S). Chinese Physics C, 1997, 21(1): 89-96.
[14]	BES Collaboration . Determination of J/ψ Leptonic Branching Fraction Via ψ(2S)→π⁺π^－J/ψ. Chinese Physics C, 1996, 20(2): 97-106.
[15]	BES Collaboration . Study of ψ(2S)Decays into pπ and KK. Chinese Physics C, 1996, 20(6): 481-490.
[16]	Yu Zhaoxian , Liu Yehou , Li Qinglin , Liang Bifang . Study of SU(2)_q,s Coherent State by Using (q,s) Deformed Harmonic Oscillators of SU(2)_q,s Quantum Algebra. Chinese Physics C, 1995, 19(3): 258-263.
[17]	BES Collaboration . New Suppression Mode of the ψ(2S) Hadronic Decay. Chinese Physics C, 1995, 19(1): 93-96.
[18]	SA Bei-Hao , ZHU Zheng-Kun , ZHANG Xiao-Ze , JIN Xing-Nan . THE EVIDENCE OF DECONFINEMENT PHASE TRANSITION OF SU(2) LATTICE GAUGE MODEL BY MONTE CARLO METHOD. Chinese Physics C, 1988, 12(5): 601-607.
[19]	CHEN Qi-Zhou , LI Zhi-Bing , HE Bao-Peng , LUO Xiang-Qian , GUO Shuo-Hong . THE WEAK INTERACTION MATRIX ELEMENTS OF │ΔS│=2 ON LATTICE. Chinese Physics C, 1988, 12(4): 459-464.
[20]	SONG Xiao-Tong , CHING Cheng-Rui , HO Tso-Hsiu . APPROXIMATE B.S. WAVE FUNCTIONS FOR AN ELECTROMAGNETIC BOUND SYSTEM OF SPINS (1/2, 1/2) OR (1/2, 1/2) WITH UNEQUAL MASSES. Chinese Physics C, 1984, 8(5): 531-538.

Access

Get Citation

M. Ablikim et al (BESⅡ collaboration). First evidence of ψ(2S)→Ω^-Ω⁺[J]. Chinese Physics C, 2012, 36(11): 1040-1045. doi: 10.1088/1674-1137/36/11/002

M. Ablikim et al (BESⅡ collaboration). First evidence of ψ(2S)→Ω^-Ω⁺[J]. Chinese Physics C, 2012, 36(11): 1040-1045. doi: 10.1088/1674-1137/36/11/002 shu

RIS(for EndNote,Reference Manager,ProCite)

BibTex

Txt

Milestone

Received: 2012-07-11
Revised: 2012-08-14

Article Metric

Article Views(2550)
PDF Downloads(720)
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

First evidence of ψ(2S)→Ω^-Ω⁺

Institute of High Energy Physics, Beijing 100049, China

Received Date: 2012-07-11

Accepted Date: 2012-08-14

Available Online: 2012-11-05

Abstract: The decay ψ(2S)→Ω^-Ω⁺ is analyzed using 14×10⁶ ψ(2S) events recorded by the Beijing Spectrometer Ⅱ (BESⅡ) at the Beijing Electron Positron Collider (BEPC). Based upon events with no missing charged tracks and a satisfactory four-constraint kinematic t, we determine the upper limit for the branching fraction of ψ(2S)→Ω^-Ω⁺ to be 1.5×10⁴ at a 90% confidence level. By including events with one missing charged track, we are able to report the first evidence of an Ω⁺ signal with a statistical signi cance of 3.1|σ. The branching fraction of ψ(2S)Ω⁺ is determined to be (4.80±1.56(stat)±1.30(sys))10⁵.

HTML

Reference (1)

First evidence of ψ(2S)→Ω^-Ω⁺

Abstract：

References

Access

Article Metrics

Metrics

通讯作者: 陈斌, bchen63@163.com

Email This Article

First evidence of ψ(2S)→Ω^-Ω⁺

HTML

目录