1. Measurement of the kaon content of three-prong tau decays
- Author
-
M. K. Sullivan, H. Yamamoto, S. J. Yellin, D. E. Pellett, Y. X. Wang, J. Lys, G. S. Greenbaum, R. L. Holtzapple, G. Zapalac, E. M. Wang, H. H. Bingham, George P Yost, S. C. Loken, S. Khacheryan, R. R. Ross, D. O. Caldwell, G. R. Lynch, A. Lu, D. R. Nygren, R. J. Madaras, G. Godfrey, W.A. Wenzel, Gilbert Shapiro, A. M. Eisner, M. L. Stevenson, K. T. Knöpfle, E. S. Miller, R. C. Berg, Werner Hofmann, J. M. Hauptman, R. R. Kofler, Philippe Eberhard, D. J. Lambert, H. P. Paar, Y. T. Oyang, Orin I. Dahl, M. T. Ronan, K. H. Fairfield, H. Marsiske, C. D. Buchanan, W. Vernon, N. A. Nicol, A. P.T. Palounek, R. Belcinski, M. G. Strauss, S. B. Chun, E.E. Bloom, A. R. Clark, D.A. Bauer, J. J. Eastman, G. E. Masek, and R. W. Stephens
- Subjects
Combinatorics ,Physics ,Systematic error ,Particle physics ,Branching fraction ,TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY ,TheoryofComputation_GENERAL ,MathematicsofComputing_DISCRETEMATHEMATICS - Abstract
We present branching fraction measurements of three-prong decays of the [tau][sup [minus]] lepton based on data from the TPC/Two-Gamma detector at SLAC PEP. The decays are classified according to the identities of the charged tracks to give simultaneous measurements of [ital B][[tau][sup [minus]][r arrow][nu][sub [tau]] [ital K][sup [minus]][pi][sup +][pi][sup [minus]]]=0.58[sub [minus]0.13][sup +0.15]% and [ital B][[tau][sup [minus]][r arrow][nu][sub [tau]] [ital K][sup [minus]][ital K][sup +][pi][sup [minus]]]=0.15[sub [minus]0.07][sup +0.09]%, and upper limits of [ital B][[tau][sup [minus]][r arrow][nu][sub [tau]][pi][sup [minus]][ital K][sup +][pi][sup [minus]]][lt]0.25%, [ital B][[tau][sup [minus]][r arrow][nu][sub [tau]] [ital K][sup [minus]][pi][sup +][ital K][sup [minus]]][lt]0.09%, and [ital B][[tau][sup [minus]][r arrow][nu][sub [tau]] [ital K][sup [minus]][ital K][sup +][ital K][sup [minus]]][lt]0.21%, where additional neutrals may be present in each case. The branching fractions are normalized to the world average three-prong topological branching fraction and there is an estimated 20% systematic error in addition to the listed statistical errors. We find the mass distributions in the [ital K][sup [minus]][pi][sup +][pi][sup [minus]] decay are consistent with [ital K][sub 1] dominance, and obtain branching fractions of [ital B][[tau][sup [minus]][r arrow][nu][sub [tau]] [ital K][sub 1][sup [minus]](1270)]=0.41[sub [minus]0.35][sup +0.41]% and [ital B][[tau][sup [minus]][r arrow][nu][sub [tau]] [ital K][sub 1][sup [minus]](1400)]=0.76[sub [minus]0.33][sup +0.40]%.
- Published
- 1994