Search for Light Neutral Particle in Low Energy e<SUP>+</SUP>e<SUP>－</SUP> Annihilation

He Jingtang; Zhu Guoyi; La Yusheng; Dong Xiaoli

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《中国物理C》（英文）编辑部

2024年10月30日

Chinese Physics C> 1994, Vol. 18> Issue(5) : 404-408

Search for Light Neutral Particle in Low Energy e⁺e^－ Annihilation

Institute of High Energy Physics, Academia Sinica, Beijing 1100039

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Abstract：
This paper reports the experiment result from a search for light neutral particle U by measuring the monoenergetic gamma ray in the singlet positronium annihilation: e⁺e^－(1S0)→γ+U. No evidence for the existence of such a particle of mass Mu＜2me has been found on the level of 2σ statndard deviation.

References

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[1]	HE Kang-Lin , MO Xiao-Hu , WANG Ping , YUAN Chang-Zheng . Experimental Searches for the Non-DD Decays of ψ(3770) in e⁺e^－ Collider. Chinese Physics C, 2007, 31(2): 125-137.
[2]	LIU Xi-Ming , SUN Xu-Bin . Strangeness Suppression in e⁺e^－ Light Flavour Jets. Chinese Physics C, 2007, 31(2): 138-142.
[3]	LIU Xi-Ming , WANG Yong-Gang , ZHANG Xue-Yao . Hadrons Production from Light Quark Jets in e^＋e^－ Annihilation. Chinese Physics C, 2004, 28(1): 11-16.
[4]	JIN Yi , LI Shi-Yuan , XIE Qu-Bing . Fragmentation of Light Initial Quarks into Charm Measons in e⁺e^－ Annihilation. Chinese Physics C, 2003, 27(10): 852-856.
[5]	WANG Hai-Long , LIU Xi-Ming , WANG Yu-Shui . Mass Dependence of Hadron Production Rates in e⁺e^－ Annihilations at High Energy. Chinese Physics C, 2002, 26(5): 471-476.
[6]	BES Collaboration . Measurement of Production Cross Section of D_s⁺D_s^－ in e⁺e^－ Annihilation at the Center-of-Mass Energy of s=4.03GeV. Chinese Physics C, 2001, 25(6): 465-475.
[7]	Chen Esheng , Wang Qun , Xie Qubing , Chen Yan . Multiplicity of D^*± in e⁺e^－ Annihilation at s=29─35Gev. Chinese Physics C, 1998, 22(3): 234-240.
[8]	Lu Gongru , Li Haibo , Yang Yadong . One Loop PGBs Effects on tt Production in High Energy e⁺e^- Annihilation. Chinese Physics C, 1996, 20(6): 522-532.
[9]	Wang Zhengzhi . Probability of e⁺e^－ Annihilation in High Energy Collision and Intermittency. Chinese Physics C, 1996, 20(1): 61-64.
[10]	Wang Qun , Xie Qubing . Production Percentages of L=1 Excited Baryons in e⁺e^－ Annihilation. Chinese Physics C, 1994, 18(9): 807-812.
[11]	Liu Ximing . Difference of Particle Multiplicities Between Quark Jets of Different Flavors in e⁺e^－ Annihilation. Chinese Physics C, 1994, 18(9): 829-835.
[12]	CHEN E-Sheng . Average Yields of Long-Lived Charged Particles in High Energy e⁺e^－ Annihilation. Chinese Physics C, 1993, 17(3): 252-261.
[13]	CHEN E-Sheng , LI Ming-Ming . Yields of Charmed and Beautiful Mesons in e⁺e^－ Annihilation at s=10—178GeV 的e⁺e^-. Chinese Physics C, 1991, 15(11): 981-990.
[14]	LIU Xi-Ming , WU Hua-You . THE FRAGMENTATION OF GLUON OF GLUON IN e⁺e^－ ANNIHILATION. Chinese Physics C, 1990, 14(11): 1001-1006.
[15]	CHEN E-Sheng , XIE Qu-Bing . THE RATIO OF CHARMED BARYON TO MESON IN e⁺e^－ ANNIHILATION. Chinese Physics C, 1990, 14(4): 319-324.
[16]	LIU Xi-Ming . THE FRAGMENTATION SCHEMES IN e⁺e^－ ANNIHILATION. Chinese Physics C, 1990, 14(1): 31-35.
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[18]	CHEN Zhi-Jiang , XIE Qu-Bing , MA Wen-Jun . THE NEAREST CORRELATION IN RAPIDITY AND THE MULTIPLICITY DISTRIBUTION IN e⁺e^－ ANNIHILATION. Chinese Physics C, 1988, 12(6): 742-748.
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He Jingtang, Zhu Guoyi, La Yusheng and Dong Xiaoli. Search for Light Neutral Particle in Low Energy e⁺e^－ Annihilation[J]. Chinese Physics C, 1994, 18(5): 404-408.

He Jingtang, Zhu Guoyi, La Yusheng and Dong Xiaoli. Search for Light Neutral Particle in Low Energy e⁺e^－ Annihilation[J]. Chinese Physics C, 1994, 18(5): 404-408. shu

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

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1.
沈阳化工大学材料科学与工程学院沈阳 110142

Search for Light Neutral Particle in Low Energy e⁺e^－ Annihilation

Corresponding author: He Jingtang,

Institute of High Energy Physics, Academia Sinica, Beijing 1100039

Received Date: 1900-01-01
Accepted Date: 1900-01-01
Available Online: 1994-05-05

Abstract: This paper reports the experiment result from a search for light neutral particle U by measuring the monoenergetic gamma ray in the singlet positronium annihilation: e⁺e^－(1S0)→γ+U. No evidence for the existence of such a particle of mass Mu＜2me has been found on the level of 2σ statndard deviation.