Result of search for low velocity exotic particles

The L3+C experiment, taking advantage of the L3 muon magnetic spectrometer, measured the spatial tracks of charged cosmic ray particles to obtain rigidity as well as velocity. One possible low velocity exotic particle is observed. The existing uncertainties are discussed, and the flux upper limit of the low velocity exotic particles from this observation is deduced based on the assumption of a null observation. The result is 6.2×10-10 cm-2.s-1.sr-1 at 90% confidence level in the velocity range from 0.04c to 0.5c.

作 者： MA Xin-Hua DING Lin-Kai GUO Ya-Nan HE Zuo-Xiu HUO An-Xiang JING Cai-Liu KUANG Hao-Huai MA Yu-Qian QING Cheng-Rui SHEN Chang-Quan YU Zhong-Qiang ZHANG Chao ZHU Qing-Qi   作者單位： MA Xin-Hua,DING Lin-Kai,GUO Ya-Nan,HUO An-Xiang,JING Cai-Liu,KUANG Hao-Huai,MA Yu-Qian,SHEN Chang-Quan,YU Zhong-Qiang,ZHANG Chao,ZHU Qing-Qi(Institute of High Energy Physics, CAS, Beijing 100049, China)

HE Zuo-Xiu,QING Cheng-Rui(Institute of Theoretical Physics, CAS, Beijing 100081, China) 

刊 名： 中國物理C（英文版）  ISTIC 英文刊名： CHINESE PHYSICS　C  年，卷(期)： 2009 33(8)  分類號(hào)： O4  關(guān)鍵詞： exotic particle   cosmic ray   L3+C  

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