QCD Sum Rules and the Determination of Fundamental Parameters

Details QCD Sum Rules and the Determination of Fundamental Parameters QCD Sum Rules and the Determination of Fundamental Parameters

2003-03-15

arxiv.org/abs/hep-ph/0303133v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

Presented in the 8th Accelerator and Particle Physics Institute (APPI 2003), Appi, Iwate Ken, Japan, Feb 25-28 2003

Scientific paper

We present a new QCD sum rule with high sensitivity to the continuum regions of charm and bottom quark pair production. Combining this sum rule with existing ones yields very stable results for the msbar quark masses, m_c(m_c)$ and m_b (m_b). Comparison of our approach with experimental data allows for a robust theoretical error estimate. We have also provided a new evaluation of the lifetime of the tau lepton, serving as a strong constraint on alpha_s.

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