MONTE-CARLO CALCULATION ON ACHIEVABLE ACCURACY OF TAU LIFETIME MEASUREMENT BY USING TEC TYPE VERTEX CHAMBER IN e+e－ INTERACTION AT CENTER OF MASS ENERGY √s =40GeV

ZHU Yong-Sheng

Chinese Physics C> 1984, Vol. 8> Issue(5) : 513-522

MONTE-CARLO CALCULATION ON ACHIEVABLE ACCURACY OF TAU LIFETIME MEASUREMENT BY USING TEC TYPE VERTEX CHAMBER IN e⁺e^－ INTERACTION AT CENTER OF MASS ENERGY √s =40GeV

ZHU Yong-Sheng ^,

Institute of High Energy Physics, Academia Sinica

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Abstract：
The most accurate tau lifetime measurement in e⁺e^－ experiments by now is reported by MARK Ⅱ with the value (3.20±0.41±0.35)×10^－13 sec. wherein the second and the third terms are statistical and systematic errors respectively. By using TEC (Time Expansion Chamber) type vertex chamber with position resolution 40μ in r-φ plane at similar experimental condition (∫Ldt=40pb^－1), MONTE-CARLO calculation shows: at center of mass energy √s =40GeV the statistical error of tau lifetime can be decreased to 0.13×10^－13 sec. and the systematic error is in a comparable value.

References

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C. A. Blocker et al., Phys. lett., 109B, (1982), 119.[2] X. LI and E. MA, Phys. Rev. Lett., 47, (1981), 1788, D. Miller, Phys. Rev., D23, (1981), 1158. G. L. Kane, SLAC-PUB-2326 (1979);D. Miller, SLAC-PUB-2713 (1981 ).[3] J. Jaros SLAC-PUB-3044 (1983);J. Jaros et al., SLAC-PUB-3164 (1983).[4] H. J. Behrend et al., DESY 82-056 (1982).[5] R. Brandelik et al., Phys. Lett., 92B, (198G), 199.[6] W. T. Ford et al., SLAC-PUB-2913 (1982).[7] G. J. Feldman et al., Phys. Rev. Lett., 48,(1982),66.[8] A. H. Walenta. IEEE Trans. Nucl. Sci. NS-26, Nr. 1,(1979),73.[9] A. H. Walenta et al., Inter. Conf. on Instrumentation for Colliding Beam Physics, 1982, SLAC Stanford, California.

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ZHU Yong-Sheng. MONTE-CARLO CALCULATION ON ACHIEVABLE ACCURACY OF TAU LIFETIME MEASUREMENT BY USING TEC TYPE VERTEX CHAMBER IN e⁺e^－ INTERACTION AT CENTER OF MASS ENERGY √s =40GeV[J]. Chinese Physics C, 1984, 8(5): 513-522.

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

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沈阳化工大学材料科学与工程学院沈阳 110142

MONTE-CARLO CALCULATION ON ACHIEVABLE ACCURACY OF TAU LIFETIME MEASUREMENT BY USING TEC TYPE VERTEX CHAMBER IN e⁺e^－ INTERACTION AT CENTER OF MASS ENERGY √s =40GeV

ZHU Yong-Sheng ^,

Corresponding author: ZHU Yong-Sheng,

Institute of High Energy Physics, Academia Sinica

Received Date: 1900-01-01
Accepted Date: 1900-01-01
Available Online: 1984-10-05

Abstract: The most accurate tau lifetime measurement in e⁺e^－ experiments by now is reported by MARK Ⅱ with the value (3.20±0.41±0.35)×10^－13 sec. wherein the second and the third terms are statistical and systematic errors respectively. By using TEC (Time Expansion Chamber) type vertex chamber with position resolution 40μ in r-φ plane at similar experimental condition (∫Ldt=40pb^－1), MONTE-CARLO calculation shows: at center of mass energy √s =40GeV the statistical error of tau lifetime can be decreased to 0.13×10^－13 sec. and the systematic error is in a comparable value.