A SENSITIVE METHOD TO DISTINGUISH THE SPIN OF THE HEAVY LEPTON <EM>τ </EM>FROM ITS TWO BODY DECAY ENERGY SPECTRA

WU JING-YUAN; CHEN ZHONG-MO; ZHANG ZI-XIAN

Chinese Physics C> 1979, Vol. 3> Issue(1) : 67-74

A SENSITIVE METHOD TO DISTINGUISH THE SPIN OF THE HEAVY LEPTON τ FROM ITS TWO BODY DECAY ENERGY SPECTRA

Abstract
HTML
Reference
Related

PDF

Abstract：
We point out that in e⁺+e^-→τ⁺+τ^- for spin 3/2 τ^±the different helicity statesof τ^{^±}will possess different weights.When the beam energy is much larger than themass of τ,we argue that,in some renormalizable models,τ may even have only ±1/2 helieity states.Therefore,the two body d cay energy spectra will show a significantdifference from that of τ with spin 1/2.This provides us with a very sensitivemethod to distinguish the spin of τ.

References

[1]

J. Kirkby, Invited talk presented at the 1977 International Symposium on Lepton and Photon Interactions at High Energies, Hamburg, SLAG-PUB-2040.[2] K.Fujikawa and N. Nawamoto, Phys, Rev. Letters, 35 (1975), 1560.[3] 伍经无、李小源、陈中祺，高能物理与核物理，2 (1978), 286.[4] D. Lurie, "Particles and Fields ", Interecience, 1968.[5] T. D. Lee and C. N. Yang, Phys. Rev., 128 (1962), 885.[6] G.J. Komen. Phys. Letters. 68B (1977). 275.[7] T. D. Lee and G. C. Wick, Phys. Rev., D2 (1970), 1033.[8] H. Georgi and S. L. Glashow, Phys. Rev. Letters, 28 (1972), 1494.[9] PLUTO Collaboration, G. Alexander et al., Preprint, DESY 78/30.[10] G. J. Feldman, SLAC-PUB-2138 (1978).[11] Jasper Kirkby, SLAC-PUB-2127 (1978).[12] Y. S. Tsai, SLAC-PUB-2105 (1978).

[1]	GUO Yun-Jun , HE Kang-Lin . Muon Identification Using the Efficiencies Ratio Method at BESⅡ. Chinese Physics C, 2007, 31(11): 1050-1055.
[2]	HU Xi-Duo , SHAO Ming-Zhu , LUO Shi-Yu , LIU Yong-Sheng , ZHU De-Hai . Average Field Idea and Single Particle Model for 2 Dimension Crystallization Beams(Ⅱ). Chinese Physics C, 2004, 28(2): 196-199.
[3]	SHEN Shui-Fa , YU Xiao-Han . Decay of ⁸³Sr and Discussion of Its Daughter's Band Structures. Chinese Physics C, 2004, 28(S1): 78-80.
[4]	Yang Jianjun , Ma Boqiang , Li Guanglie . Non-perturbative Quark Propagator and the Study of the Non-trivial Q² Dependence in the Nucleon Structure Functions. Chinese Physics C, 1997, 21(2): 146-156.
[5]	Yu Hong , Shen Qixing , Zhang Lin . Angular Distribution of Process e⁺e^－→τ⁺τ^－,τ^－→a₁υτ,a₁→ρπ and Characteristics of a₁ Meson. Chinese Physics C, 1994, 18(7): 583-590.
[6]	BES Collaboration . Experimental Study of Resonance f₂(1270) in the J/ψ Hadronic Decay. Chinese Physics C, 1993, 17(2): 97-106.
[7]	SANG Jian-Ping , LIU Chao-Shan , LIU Yong . Relation Between the Gap at Z=64 Subshell and the Abrupt Transition in the Region N=88～90. Chinese Physics C, 1991, 15(2): 150-157.
[8]	HOU Ren-Chang , ZHAO Xuan . QUADRUPOLE-OCTUPOLE TWO-PHONON EXCITATIONS IN INELASTIC SCATTERING. Chinese Physics C, 1983, 7(2): 236-244.
[9]	Sa Ben-hao , Zhang Xi-zhen , Li Zhu-xia , Shi Yi-jin . A PRIMARY RESEARCH OF THE PHONON RENORMALIZATION OF NUCLEAR FIELD THEORY. Chinese Physics C, 1980, 4(3): 398-400.

Access

Get Citation

WU JING-YUAN, CHEN ZHONG-MO and ZHANG ZI-XIAN. A SENSITIVE METHOD TO DISTINGUISH THE SPIN OF THE HEAVY LEPTON τ FROM ITS TWO BODY DECAY ENERGY SPECTRA[J]. Chinese Physics C, 1979, 3(1): 67-74.

WU JING-YUAN, CHEN ZHONG-MO and ZHANG ZI-XIAN. A SENSITIVE METHOD TO DISTINGUISH THE SPIN OF THE HEAVY LEPTON τ FROM ITS TWO BODY DECAY ENERGY SPECTRA[J]. Chinese Physics C, 1979, 3(1): 67-74. shu

RIS(for EndNote,Reference Manager,ProCite)

BibTex

Txt

Milestone

Received: 1978-05-17
Revised: 1900-01-01

Article Metric

Article Views(2264)
PDF Downloads(274)
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

A SENSITIVE METHOD TO DISTINGUISH THE SPIN OF THE HEAVY LEPTON τ FROM ITS TWO BODY DECAY ENERGY SPECTRA

Received Date: 1978-05-17
Accepted Date: 1900-01-01
Available Online: 1979-02-05

Abstract: We point out that in e⁺+e^-→τ⁺+τ^- for spin 3/2 τ^±the different helicity statesof τ^{^±}will possess different weights.When the beam energy is much larger than themass of τ,we argue that,in some renormalizable models,τ may even have only ±1/2 helieity states.Therefore,the two body d cay energy spectra will show a significantdifference from that of τ with spin 1/2.This provides us with a very sensitivemethod to distinguish the spin of τ.