Search for new massive particles in cosmic rays

	Search for new massive particles in cosmic rays
	Chen HS(陈和生); Dai ZJ(戴长江); Ding LK(丁林恺); Guo YN(过雅南); Huo AX(霍安祥); Jing CL(经才骝); Kuang HH(况浩怀); Liu HT(刘海涛); Ma JM(马基茂); Shen ZQ(沈长铨)
刊名	PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS
	1997
卷号	282 期号:1 页码:2-34
关键词	cosmic ray dark matter mass of particle
英文摘要	In this paper, some unusual cosmic ray events are reviewed. They are the Yunnan event recorded in 1972 using a cloud chamber at Yunnan Cosmic Ray Station (YCRS) near Kunming, the south-west of China; the six exotic events (Kolar events) collected during 1965 to 1975 in the Kolar Gold Mine Field (KGF) in south India; and a double-core event obtained also in KGF in 1979 at a depth different from that where the other six were obtained, In addition, some interesting phenomena were also noticed: the abnormal upward muon flux observed by the MINI collaboration, and several intriguing signals seen in the proton detector in KGF, A careful kinematics analysis has shown that all these exotic events are likely to be related to a kind of heavy and slow-moving (i.e. with a Lorentz factor gamma approximate to 2-5) particles produced from cosmic ray interactions. Besides, the rough flux estimates in these experiments seem to indicate that the event rate does not depend on the depth. Thus a natural hypothesis is that there is a heavy and neutral component in the cosmic rays which might be related with the long-sought weakly interacting massive particle (WIMP) - one of the most promising candidates of the dark matter of our Universe. Moreover, from the tracks seen in these events, there is also a signal of the possible existence of a kind of heavy and charged particles with a relatively long lifetime (say, longer than 10(-9) s) which might be the interacting products of the unknown cosmic ray particles mentioned above. We then turn to the question of how to search for these exotic particles in cosmic rays, and propose to build a dedicated magnetic spectrometer for identifying them.
学科主题	Physics
类目[WOS]	Physics, Multidisciplinary
收录类别	SCI
WOS记录号	WOS:A1997WT87400001
公开日期	2016-05-03
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/225440]
专题	高能物理研究所_院士高能物理研究所_粒子天体物理中心
推荐引用方式 GB/T 7714	Chen HS,Dai ZJ,Ding LK,et al. Search for new massive particles in cosmic rays[J]. PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS,1997,282(1):2-34.
APA	陈和生.,戴长江.,丁林恺.,过雅南.,霍安祥.,...&Gao, CS.(1997).Search for new massive particles in cosmic rays.PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS,282(1),2-34.
MLA	陈和生,et al."Search for new massive particles in cosmic rays".PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS 282.1(1997):2-34.