James Osborne

Strong coupling from the revised ALEPH data for hadronic τ decays

We apply an analysis method previously developed for the extraction of the strong coupling from the OPAL data to the recently revised ALEPH data for non-strange hadronic

An Updated determination of

\tau

\alpha_s

decays. Our analysis yields the values

from

\alpha_s(m_\tau^2)=0.296\pm 0.010

\tau

using fixed-order perturbation theory, and

decays

\alpha_s(m_\tau^2)=0.310\pm 0.014

Duality violations in τ hadronic spectral moments

using contour-improved perturbation theory. Averaging these values with our previously obtained values from the OPAL data, we find

A new determination of \alpha_s from hadronic \tau\ decays

\alpha_s(m_\tau^2)=0.303\pm 0.009

Search for Heavy Stops with Merged Top-Jets

, respectively,

Issues in determining αs from hadronic τ decay and electroproduction data

\alpha_s(m_\tau^2)=0.319\pm 0.012