QCD Sum Rules and the Determination of Fundamental Parameters

2003/03/15 by Jens Erler, M. X. Luo, Erler, Jens +2
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph

paper · pdf · doi:10.48550/arxiv.hep-ph/0303133

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

arxiv created 2003/03/27 · arxiv updated 2009/11/30

Abstract

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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