ON THE SENSITIVE AREA OF SPIN-PARITY ANALYSIS FOR J/ψ RADIATIVE DECAY PRODUCTS INTO TWO PSEUDOSCALARS

YAN Wu-Guang

Chinese Physics C> 1990, Vol. 14> Issue(3) : 193-199

ON THE SENSITIVE AREA OF SPIN-PARITY ANALYSIS FOR J/ψ RADIATIVE DECAY PRODUCTS INTO TWO PSEUDOSCALARS

YAN Wu-Guang ^,

Institute of High Energy Physics,Academia Sinica

Abstract
HTML
Reference
Related

PDF

Abstract：
The spin-parity analysis of the J/ψ radiative decay products into two pseudoscalars usually uses the angular distribution calculated by the helicity amplitude formalism.This paper investigated the sensitivity of this method and pointed out the followings; 1) there really exists some insensitive area; 2).unfortunately,θ(1720) falls into the insensitive area of 2⁺-0⁺ distinction; so the spin of θ(1720) has not been finally established yet; 3).according to the Mark-3 data,for the newly observed very narrow peak ξ(2230),the spin 0⁺ assignment can be ruled out.

References

[1]

T. Z. RUAN, et al., Proceedings of the BIMP Symposium on Heavy Flavor Physics, p. 410-418, Aue.11, 1988, Beijing; T. Z. RUAN, et al., to be published in High Energy Physics and Nuclear Physics.[2] 赵佩英等，物理学报，26(1977),16;C. S. GAO, et al., Proceedings of the Workshop on Colliding Beam Physics, p. 243, June, 1984, Beijing.[3] M. JACOB and G. C. WICK,Ann. Phys., (NY) 7(1959), 404;K. F. EINSWEILER, SLAG Report 272(1984);R. M. BALTRUSAITIS et al. Phys. Rev., D 35(1987), 2077.[4] C.EDWARDS et al., Phys, Rev. Lett., 48(1982), 458;C.EDWARDS et al., Phys. Rev.，D25(1982), 3065.[5] M. E. B. FRANKLIN, SLAC Report 254(1982).[6] J. E, AUGUSTIN et al., Orsay preprint, LAL/85-27(1985);J. E. AUGUSTIN et al., Phys. Rev. Lett., 60(1988), 2238.

[1]	LIU Zu-Hua , BAO Jing-Dong . Synthesis and Decay of Superheavy Nuclei in the Deformed Region. Chinese Physics C, 2006, 30(S2): 118-120.
[2]	XU Shu-Wei , XIE Yuan-Xiang , XING Ye-Bing , XU Fu-Rong , LIU Hong-Liang , LI Zhan-Kui . β-Delayed Proton Decays of ¹⁴⁰Tb and ¹⁴¹Dy as Well as the Spin and Parity of ¹⁴³Dy. Chinese Physics C, 2006, 30(6): 526-529.
[3]	XIAO Shu-Dong , ZHU Sheng-Jiang , YANG Li-Ming , ZHANG Zheng , JIANG Zhuo , CHE Xing-Lai , U Yong-Nan . High-Spin States and Negative Parity Levels in Neutron-Rich ^116,118,120Cd Nuclei. Chinese Physics C, 2004, 28(1): 37-41.
[4]	XU Yan-Bing , LIAO Ji-Zhi . Studies on the HF States and the Negative-Parity Spectra of Even Even Cd Nuclei. Chinese Physics C, 2003, 27(2): 142-146.
[5]	DENG Fu-Guo , YANG Chun-Xiang , SUN Hui-Bin , WU Xiao-Guang , LU Jing-Bin , ZHAO Guang-Yi , HAN Guang-Bing , PENG Zhao-Hua , YIN Li-Chang , WEN Shu-Xian , LI Guang-Sheng , YUAN Guan-Ju , , , . Study on the High-Spin States and Signature Inversion of Odd-Odd Nucleus ¹⁷⁰ Ta. Chinese Physics C, 2002, 26(5): 491-500.
[6]	XU Yan-Bing , LIAO Ji-Zhi . Studies on the HF States and the Negative Parity Bands of Even Even Ge and Se Nuclei. Chinese Physics C, 2002, 26(6): 613-619.
[7]	PENG Hong-An , DUAN Chun-Gui , YAN Zhan-Yuan , HE Zhen-Min . An Alternative Mechanism of Glueball Production in the J/ψ Radiative Decays. Chinese Physics C, 2002, 26(8): 747-752.
[8]	WU XingJu , LIANG YuSheng , XU JinZhang , CHEN XingQu , XING Zheng . Study of the Negative-Parity Yrast States in Odd-A Lu-Isotopes. Chinese Physics C, 2000, 24(4): 342-346.
[9]	Zhang Lin , Yu Hong , Shen Qixing . Angular Distributions for the Process e⁺e^－→J/ψ→γ+X(J^PC),X→BB and Spin-Parity Analysis of the Resonance X. Chinese Physics C, 1996, 20(3): 280-285.
[10]	Shen Qixing , Yu Hong . Determining the Spin-Parity of the Boson Resonance X in the Process J/ψ→X+f₀ (980) by Using the Generalized Moment Analysis Method. Chinese Physics C, 1996, 20(1): 45-47.
[11]	Shi Zongren , Wan Shuying . Negative Parity States of Collective Motion in Actinide Nuclei. Chinese Physics C, 1995, 19(5): 438-446.
[12]	Yu Hong , Shen Qixing . A Possible New Resonance State──Spin-Parity Analysis of the X Resonance in J/ψ→X＋f₀ (975) Process. Chinese Physics C, 1994, 18(12): 1143-1146.
[13]	Qian Chengde . Effects of Positive-Parity States Octupole Correlations for Even-Even Nuclei in Rotational Regions. Chinese Physics C, 1994, 18(5): 473-480.
[14]	SHEN Qixing , YU Hong . Determination of the Spin-parity of the Boson Resonance X for the Process J/ψ→V₁+X,X→γ+V₂. Chinese Physics C, 1993, 17(11): 988-992.
[15]	YU Hong , SHEN Qi-Xing , ZHU Yu-Can , ZHENG Zhi-Peng , CHENG Zheng-Dong . Studies of the Wide Resonance θ(1720) in J/ψ Hadronic Decays. Chinese Physics C, 1993, 17(7): 601-604.
[16]	SHEN Qi-Xing , YU Hong . Determining the Spin and Parity of Particle X for the Process J/ψ→V₁,X→V₂+V₃ by Using the Generalized Moment Analysis Method. Chinese Physics C, 1993, 17(6): 503-510.
[17]	SHEN Qi-Xing , YU Hong . Spin and parity analysis for the three-step two-body hadronic decay processes of J/ψ. Chinese Physics C, 1992, 16(3): 219-228.
[18]	WANG Tai-Jie , RUAN Tong-Ze , YAN Wu-Guang , YU Hong , ZHENG Min . EXPERIMENTAL METHOD FOR SPIN-PARITY ANALYSIS OF J/ψ RADIATIVE DECAY PRODUCTS. Chinese Physics C, 1990, 14(5): 385-392.
[19]	YU Hong . QUARK AND GLUON CONTENT OF η、η′AND ι(1440),THEIR DECAYS IN TWO PHOTONS AND PRODUCTIONS IN J/ψ RADIATIVE DECAY. Chinese Physics C, 1988, 12(6): 754-760.
[20]	LI ZI-PING . THE G_s PARITY OF STRANGE MESONS AND THE SELECTION RULE IN STRONG DECAY OF RESONANCE STATE. Chinese Physics C, 1981, 5(3): 372-373.

Access

Get Citation

YAN Wu-Guang. ON THE SENSITIVE AREA OF SPIN-PARITY ANALYSIS FOR J/ψ RADIATIVE DECAY PRODUCTS INTO TWO PSEUDOSCALARS[J]. Chinese Physics C, 1990, 14(3): 193-199.

YAN Wu-Guang. ON THE SENSITIVE AREA OF SPIN-PARITY ANALYSIS FOR J/ψ RADIATIVE DECAY PRODUCTS INTO TWO PSEUDOSCALARS[J]. Chinese Physics C, 1990, 14(3): 193-199. shu

RIS(for EndNote,Reference Manager,ProCite)

BibTex

Txt

Milestone

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

Article Metric

Article Views(2418)
PDF Downloads(481)
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

ON THE SENSITIVE AREA OF SPIN-PARITY ANALYSIS FOR J/ψ RADIATIVE DECAY PRODUCTS INTO TWO PSEUDOSCALARS

YAN Wu-Guang ^,

Corresponding author: YAN Wu-Guang,

Institute of High Energy Physics,Academia Sinica

Received Date: 1900-01-01
Accepted Date: 1900-01-01
Available Online: 1990-03-05

Abstract: The spin-parity analysis of the J/ψ radiative decay products into two pseudoscalars usually uses the angular distribution calculated by the helicity amplitude formalism.This paper investigated the sensitivity of this method and pointed out the followings; 1) there really exists some insensitive area; 2).unfortunately,θ(1720) falls into the insensitive area of 2⁺-0⁺ distinction; so the spin of θ(1720) has not been finally established yet; 3).according to the Mark-3 data,for the newly observed very narrow peak ξ(2230),the spin 0⁺ assignment can be ruled out.