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Resonant structure of τ→϶π0ντ and τ→ωπντ decays

Physical Review D Particles Fields Gravitation and Cosmology 61:7 (2000) 1-16

Authors:

KW Edwards, R Janicek, PM Patel, AJ Sadoff, R Ammar, P Baringer, A Bean, D Besson, R Davis, S Kotov, I Kravchenko, N Kwak, X Zhao, S Anderson, VV Frolov, Y Kubota, SJ Lee, R Mahapatra, JJ O'Neill, R Poling, T Riehle, A Smith, S Ahmed, MS Alam, SB Athar, L Jian, L Ling, AH Mahmood, M Saleem, S Timm, F Wappler, A Anastassov, JE Duboscq, KK Gan, C Gwon, T Hart, K Honscheid, H Kagan, R Kass, J Lorenc, H Schwarthoff, E Von Toerne, MM Zoeller, SJ Richichi, H Severini, P Skubic, A Undrus, M Bishai, S Chen, J Fast, JW Hinson, J Lee, N Menon, DH Miller, EI Shibata, IPJ Shipsey, Y Kwon, AL Lyon, 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, V Shelkov, R Stroynowski, J Ye, T Wlodek, M Artuso, R Ayad, E Dambasuren, S Kopp, G Majumder, GC Moneti, R Mountain, S Schuh, T Skwarnicki, S Stone, A Titov, G Viehhauser, JC Wang, A Wolf, J Wu, SE Csorna, KW McLean, S Marka, Z Xu, R Godang, K Kinoshita, IC Lai, P Pomianowski, S Schrenk, G Bonvicini

Abstract:

The resonant structure of the four pion final state in the decay τ→3ππ0ντ has been analyzed using 4.27 million τ+τ- pairs collected by the CLEO II experiment at the Cornell Electron Storage Ring. A partial wave analysis of the resonant structure of the ô-»3 τ→3ππ0ντ decay has been performed; the spectral decomposition of the four pion system is dominated by the ωπ and a1π final states. The mass and width of the ρ′ resonance have been extracted from a fit to the τ→ωπντ spectral function. We have searched for second class currents in the decay τ→ωπντ using spin-parity analysis and established an upper limit on the non-vector current contribution. ©2000 The American Physical Society.

Update of the search for the neutrinoless decay τ→μγ

Physical Review D Particles Fields Gravitation and Cosmology 61:7 (2000) 1-6

Authors:

S Ahmed, MS Alam, SB Athar, L Jian, L Ling, AH Mahmood, M Saleem, S Timm, F Wappler, A Anastassov, JE Duboscq, KK Gan, C Gwon, T Hart, K Honscheid, H Kagan, R Kass, J Lorenc, TK Pedlar, H Schwarthoff, E Von Toerne, MM Zoeller, SJ Richichi, H Severini, P Skubic, A Undrus, S Chen, J Fast, JW Hinson, J Lee, N Menon, DH Miller, EI Shibata, IPJ Shipsey, V Pavlunin, D Cronin-Hennessy, Y Kwon, AL Lyon, EH Thorndike, CP Jessop, 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, R Ayad, E Dambasuren, S Kopp, G Majumder, GC Moneti, R Mountain, S Schuh, T Skwarnicki, S Stone, G Viehhauser, JC Wang, A Wolf, J Wu, SE Csorna, KW McLean, S Márka, Z Xu, R Godang, K Kinoshita, IC Lai, S Schrenk, G Bonvicini, D Cinabro, LP Perera, GJ Zhou, G Eigen, E Lipeles, M Schmidtler, A Shapiro, WM Sun, AJ Weinstein, F Würthwein, DE Jaffe, G Masek, HP Paar, EM Potter, S Prell, V Sharma, DM Asner, A Eppich, J Gronberg, TS Hill, DJ Lange, RJ Morrison, HN Nelson, RA Briere

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.

Limits on Gravitino Production and New Processes with Large Missing Transverse Energy in p-pbar Collisions at sqrt(s)=1.8 TeV

ArXiv hep-ex/0003026 (2000)

Authors:

CDF Collaboration, T Affolder

Search for New Particles Decaying to top-antitop in proton-antiproton collisions at squareroot(s)=1.8 TeV

ArXiv hep-ex/0003005 (2000)

Limit on the tau neutrino mass from τ-→϶-π+π-π 0vτ

Physical Review D Particles Fields Gravitation and Cosmology 61:5 (2000) 1-7

Authors:

M Athanas, P Avery, CD Jones, M Lohner, C Prescott, AI Rubiera, J Yelton, J Zheng, G Brandenburg, RA Briere, A Ershov, YS Gao, DYJ Kim, R Wilson, TE Browder, Y Li, JL Rodriguez, H Yamamoto, T Bergfeld, BI Eisenstein, J Ernst, GE Gladding, GD Gollin, RM Hans, E Johnson, I Karliner, MA Marsh, M Palmer, C Plager, C Sedlack, M Selen, JJ Thaler, J Williams, KW Edwards, R Janicek, PM Patel, AJ Sadoff, R Ammar, P Baringer, A Bean, D Besson, D Coppage, R Davis, S Kotov, I Kravchenko, N Kwak, X Zhao, L Zhou, S Anderson, VV Frolov, Y Kubota, SJ Lee, R Mahapatra, JJ O'Neill, R Poling, T Riehle, A Smith, MS Alam, SB Athar, AH Mahmood, S Timm, F Wappler, A Anastassov, JE Duboscq, KK Gan, C Gwon, T Hart, K Honscheid, H Kagan, R Kass, J Lorenc, H Schwarthoff, E Von Toerne, MM Zoeller, SJ Richichi, H Severini, P Skubic, A Undrus, M Bishai, S Chen, J Fast, JW Hinson, J Lee, N Menon, DH Miller, EI Shibata, IPJ Shipsey, S Glenn, Y Kwon, AL Lyon, EH Thorndike, CP Jessop, K Lingel, H Marsiske, ML Perl, V Savinov, D Ugolini, X Zhou, TE Coan, V Fadeyev

Abstract:

From a data sample of 29058 τ±→϶±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.