【摘 要】
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We report a feasibility study for violation in τ-→ KSπ-vτ decays at a Super Tau Charm Facility (STCF).With an expected luminosity of 1 ab-1 collected by STC
【机 构】
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State Key Laboratory of Particle Detection and Electronics, Hefei 230026, China;University of Scienc
论文部分内容阅读
We report a feasibility study for violation in τ-→ KSπ-vτ decays at a Super Tau Charm Facility (STCF).With an expected luminosity of 1 ab-1 collected by STCF per year at a center-of-mass energy of 4.26 GeV,the statistical sensitivity for CP violation is determined to be of order 9.7 × 10-4 by measuring the decay-rate difference between τ+ → KSπ+-vτ and τ-→ KSπ-vτ.The analysis is performed using a reliable fast simulation software package,which can describe the detector responses properly and vary the responses flexibly for further optimization.Moreover,the energy-dependent efficiencies for reconstructing τ-→ KSπ-vτ are presented.The expected CP sensitivity is proportional to 1/√(£) in the energy region from 4.0 to 5.0 GeV.The sensitivity of CP violation is of order 3.1 × 10-4 with 10 ab-1 integrated luminosity,which is equivalent to ten years' data taking in this energy region at STCF.
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