Update of the search for the neutrinoless decay τ→μγ
Physical Review D - Particles, Fields, Gravitation and Cosmology 61:7 (2000) 1-6
Abstract:
We present an update of the search for the lepton family number violating decay τ→μγ using 12.6 million τ+τ- pairs collected with the CLEO detector. No evidence of a signal has been found and the corresponding upper limit is script B sign(τ→μγ)<1.1×10-6 at 90% C.L., significantly smaller than previous experimental limits. ©2000 The American Physical Society.Limit on the tau neutrino mass from τ-→π-π+π-π 0vτ
Physical Review D - Particles, Fields, Gravitation and Cosmology 61:5 (2000) 1-7
Abstract:
From a data sample of 29058 τ±→π±π+π -π0vτdecays observed in the CLEO detector we derive a 95% confidence upper limit on the tau neutrino mass of 28 MeV. ©2000 The American Physical Society.Measurement of B→ρlv decay and
Physical Review D - Particles, Fields, Gravitation and Cosmology 61:5 (2000) 1-19
Abstract:
Using a sample of 3.3×106 Y(4S)→BB̄ events collected with the CLEO II detector at the Cornell Electron Storage Ring (CESR), we measure B(B→ρlv), |Vub|, and the partial rate (ΔΓ) in three bins of q2≡(pB -pρ)2. We find B(B0→ρ-l+v)=(2.69±0.41 -0.40+0.35±0.50)×10-4, |Vub|=(3.23±0.24-0.26+0.23 ±0.58)×10-3, ΔΓ(0Performance of the CLEO III LiF-TEA ring imaging Cherenkov detector in a high-energy muon beam
Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 441:3 (2000) 374-392
Abstract:
The CLEO III Ring Imaging Cherenkov detector uses LiF radiators to generate Cherenkov photons which are then detected by proportional wire chambers using a mixture of CH4 and TEA gases. The first two photon detector modules which were constructed, were taken to the Fermilab and tested in a beam dump that provided high-momentum muons. We report on results using both plane and 'sawtooth'-shaped radiators. Specifically, we discuss the number of photoelectrons observed per ring and the angular resolution. The particle separation ability is shown to be sufficient for the physics of CLEO III.Structure functions in the decay τ∓→π∓π0π0ν τ
Physical Review D - Particles, Fields, Gravitation and Cosmology 61:5 (2000) 1-11