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First Observation of the Decay τ- → K*-η ντ

Physical Review Letters 82:2 (1999) 281-285

Authors:

M Bishai, S Chen, J Fast, JW Hinson, N Menon, DH Miller, EI Shibata, IPJ Shipsey, S Glenn, Y Kwon, AL Lyon, S Roberts, EH Thorndike, CP Jessop, K Lingel, H Marsiske, ML Perl, V Savinov, D Ugolini, X Zhou, TE Coan, V Fadeyev, I Korolkov, Y Maravin, I Narsky, R Stroynowski, J Ye, T Wlodek, M Artuso, E Dambasuren, S Kopp, GC Moneti, R Mountain, S Schuh, T Skwarnicki, S Stone, A Titov, G Viehhauser, JC Wang, J Bartelt, SE Csorna, KW Mc Lean, S Marka, Z Xu, R Godang, K Kinoshita, IC Lai, P Pomianowski, S Schrenk, G Bonvicini, D Cinabro, R Greene, LP Perera, GJ Zhou, S Chan, G Eigen, E Lipeles, JS Miller, M Schmidtler, A Shapiro, WM Sun, J Urheim, AJ Weinstein, F Würthwein, DE Jaffe, G Masek, HP Paar, EM Potter, S Prell, V Sharma, DM Asner, J Gronberg, TS Hill, DJ Lange, RJ Morrison, HN Nelson, TK Nelson, D Roberts, BH Behrens, WT Ford, A Gritsan, H Krieg, J Roy, JG Smith, JP Alexander, R Baker, C Bebek, BE Berger, K Berkelman, V Boisvert, DG Cassel, DS Crowcroft, M Dickson, S Von Dombrowski, PS Drell, KM Ecklund, R Ehrlich, AD Foland, P Gaidarev, RS Galik

Abstract:

The decay τ-→ K*- η ν τ has been observed with the CLEO II detector. The K*- is reconstructed in two decay channels, K*-→ KSπ-→π+π- and K*-→ K-π0. The η is reconstructed from the decay η → γγ. The measured branching fraction isB(τ-→ K*-π η ντ)=(2.9 ± 0.8 ±0.4) × 10-44. We also measure the inclusive branching fractions without requiring the K* resonance, B(τ-→ KSπ- η ντ)=(1.10 ± 0.35 ±0.11) × 10-4 and B(τ-→ K-π0 η ντ)=(1.77 ± 0.56 ±0.71) × 10-4. The results indicate that the K*- resonance dominates the KSπ- mass spectrum. © 2000 The American Physical Society.
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First Observations of ϒ(1S)→γπ+π- and ϒ(1S)→γπ+π0π0

Physical Review Letters 82:2 (1999) 286-290

Authors:

A Anastassov, JE Duboscq, KK Gan, T Hart, K Honscheid, H Kagan, R Kass, J Lee, H Schwarthoff, A Wolf, MM Zoeller, SJ Richichi, H Severini, P Skubic, A Undrus, M Bishai, S Chen, J Fast, JW Hinson, N Menon, DH Miller, EI Shibata, IPJ Shipsey, S Glenn, Y Kwon, AL Lyon, S Roberts, EH Thorndike, CP Jessop, K Lingel, H Marsiske, ML Perl, V Savinov, D Ugolini, X Zhou, TE Coan, V Fadeyev, I Korolkov, Y Maravin, I Narsky, R Stroynowski, J Ye, T Wlodek, M Artuso, E Dambasuren, S Kopp, GC Moneti, R Mountain, S Schuh, T Skwarnicki, S Stone, A Titov, G Viehhauser, JC Wang, J Bartelt, SE Csorna, KW Mc Lean, S Marka, Z Xu, R Godang, K Kinoshita, IC Lai, P Pomianowski, S Schrenk, G Bonvicini, D Cinabro, R Greene, LP Perera, GJ Zhou, S Chan, G Eigen, E Lipeles, JS Miller, M Schmidtler, A Shapiro, WM Sun, J Urheim, AJ Weinstein, F Würthwein, DE Jaffe, G Masek, HP Paar, EM Potter, S Prell, V Sharma, DM Asner, J Gronberg, TS Hill, DJ Lange, RJ Morrison, HN Nelson, TK Nelson, D Roberts, BH Behrens, WT Ford, A Gritsan, H Krieg, J Roy, JG Smith, JP Alexander

Abstract:

We report on a study of exclusive radiative decays of the ϒ(1S) resonance collected with the CLEO II detector operating at the Cornell Electron Storage Ring. We present the first observation of the radiative decays ?(1S)→γπ+#x03C0;- and ϒ(1S)→ γ #x03C0;0#x03C0;0. For the dipion mass regime m#x03C0;#x03C0; > 1.0 GeV we obtain B(ϒ(1S)→ γ#x03C0;+#x03C0;-)=(6.3±1.2±1.3)×10-5 and B(ϒ(1S)→ γ#x03C0;0#x03C0;0)=(1.7±0.6±0.3)×10-5. © 2000 The American Physical Society.
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Orbital modulation and longer term variability in the radio emission from Cygnus X-1

Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) 302:1 (1999) l1-l5

Authors:

GG Pooley, RP Fender, C Brocksopp
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A large-scale bulk flow of galaxy clusters

ASTROPHYSICAL JOURNAL 512:2 (1999) L79-L82

Authors:

MJ Hudson, RJ Smith, JR Lucey, DJ Schlegel, RL Davies
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Abundance Gradients from Massive, Early-Type Stars — the Milky Way and Beyond

Chapter in Chemical Evolution from Zero to High Redshift, Springer Nature (1999) 24-29
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