Measurement of the Branching Ratios of τ±→π±+nπ0+ντ(n=0,1,2) decays

BES Collaboration

Chinese Physics C> 1997, Vol. 21> Issue(3) : 193-200

Measurement of the Branching Ratios of τ^±→π^±+nπ⁰+ν_τ(n=0,1,2) decays

BES Collaboration

Institute of High Energy Physics,The Chinese Academy of Sciences,Beijing 100039

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Abstract：
Using the data sample accumulated with the Beijing Spectrometer at the center-of-mass energy of 4.03GeV,we have analysed τ^±τ^±→e^±+π^±+nπ⁰+ν's(n=0,1,2)events.The branching ratios are given as Br(τ^±→π^±ν_τ)=(11.64±0.49^+0.76_－0.73%,Br(τ^±→π^±π⁰ν_τ)=(24.00±1.34^+1.36_－1.30%,Br(τ^±→π^±2π⁰ν_τ)=(9.39±1.68^+1.69_－1.66%.

References

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PDG, Review of Particle Properties, Phys. Rev., D50(19941)4 04.[2] BES collab., Nucl. Instr. Method, A344(1994)319.[3] BES合作组, 高能物理与核物理, 21(1997)97[4] 吴济民、赵佩英, 高能物理与核物理, 17(1993)379[5] PDG, 1995 Partial Update to the Review of Particle Properties.[6] Blocker et al., Phys Lett. 1098(1982)119.[7] Adler et al, Phys Rev Lett., 59(1987)1527.

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BES Collaboration. Measurement of the Branching Ratios of τ^±→π^±+nπ⁰+ν_τ(n=0,1,2) decays[J]. Chinese Physics C, 1997, 21(3): 193-200.

BES Collaboration. Measurement of the Branching Ratios of τ^±→π^±+nπ⁰+ν_τ(n=0,1,2) decays[J]. Chinese Physics C, 1997, 21(3): 193-200. shu

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

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Measurement of the Branching Ratios of τ^±→π^±+nπ⁰+ν_τ(n=0,1,2) decays

BES Collaboration

Institute of High Energy Physics,The Chinese Academy of Sciences,Beijing 100039

Received Date: 1900-01-01
Accepted Date: 1900-01-01
Available Online: 1997-03-05

Abstract: Using the data sample accumulated with the Beijing Spectrometer at the center-of-mass energy of 4.03GeV,we have analysed τ^±τ^±→e^±+π^±+nπ⁰+ν's(n=0,1,2)events.The branching ratios are given as Br(τ^±→π^±ν_τ)=(11.64±0.49^+0.76_－0.73%,Br(τ^±→π^±π⁰ν_τ)=(24.00±1.34^+1.36_－1.30%,Br(τ^±→π^±2π⁰ν_τ)=(9.39±1.68^+1.69_－1.66%.