Measurement of the Branching Ratios of τ±→π±+nπ0τ(n=0,1,2) decays

  • Using the data sample accumulated with the Beijing Spectrometer at the center-of-mass energy of 4.03GeV,we have analysed τ±τ±→e±±+nπ0+ν's(n=0,1,2)events.The branching ratios are given as Br(τ±→π±ντ)=(11.64±0.49+0.76-0.73%,Br(τ±→π±π0ντ)=(24.00±1.34+1.36-1.30%,Br(τ±→π±0ντ)=(9.39±1.68+1.69-1.66%.
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  • [1] 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±+nπ0τ(n=0,1,2) decays[J]. Chinese Physics C, 1997, 21(3): 193-200.
BES Collaboration. Measurement of the Branching Ratios of τ±→π±+nπ0τ(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±+nπ0τ(n=0,1,2) decays

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

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±±+nπ0+ν's(n=0,1,2)events.The branching ratios are given as Br(τ±→π±ντ)=(11.64±0.49+0.76-0.73%,Br(τ±→π±π0ντ)=(24.00±1.34+1.36-1.30%,Br(τ±→π±0ντ)=(9.39±1.68+1.69-1.66%.

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