v 1 3 A ug 1 99 5 CLNS 95 / 1338 CLEO 95 – 8 February 7 , 2008

0 v 1 6 A ug 1 99 9 CLNS 99 / 1628 CLEO 99 – 8

Using the CLEO II detector operating at the CESR ee collider, we have measured the structure functions in the decay τ → πππντ , based on a sample corresponding to 4 × 10 produced τ -pair events. We determine the integrated structure functions, which depend only on the three pion invariant mass, as well as the structure functions differential in the Dalitz plot. We extract model independent limi...

ep - e x / 99 06 01 5 v 3 2 1 Ju n 19 99 CLNS 99 / 1621 CLEO 99 / 5 Limit on Tau Neutrino Mass from τ − →

From a data sample of 29058 τ → ππππντ decays observed in the CLEO detector we derive a 95% confidence upper limit on the tau neutrino mass of 28 MeV. Typeset using REVTEX

/ 95 08 34 8 v 1 2 2 A ug 1 99 5 Mass relation of ρ and a 1 mesons Bing

A mass relation of ρ and a 1 mesons has been obtained from Weinberg's first sum rule and KSFR sum rule.

/ 95 08 35 6 v 1 2 3 A ug 1 99 5 MC / TH 95 / 14 ρ → 4 π in chirally symmetric models

ar X iv : h ep - p h / 95 08 24 5 v 1 5 A ug 1 99 5 UCSD / PTH 95 - 07 June 1995 EFFECTIVE FIELD THEORIES

These lectures introduce some of the basic notions of effective field theories, as used in particle physics. The topics discussed are the ∆S = 1 and ∆S = 2 weak interactions, and chiral perturbation theory as applied to mesons, baryons, and hadrons containing heavy quarks.