Estimate of the systematic error in tau decay due to duality violations

Abstract

With the help of a physically motivated ansatz, which is fitted to the data, we estimate the size of possible duality violations in hadronic tau decay. The result is that the uncertainty associated with these violations could impact the alpha_s determination from the total decay width at a level which we estimate to be δalpha_s(m_tau) \sim 0.003-0.010. Consequently, it cannot be neglected.

5 pages, 2 Figures. 8th Conference Quark Confinement and the Hadron Spectrum, September 2008, Mainz, Germany

References in corpus (5)

• Hadronic Z- and tau-Decays in Order alpha_s^4
• Alpha_s(M_Z) from hadronic tau decays
• Unraveling duality violations in hadronic tau decays
• Possible duality violations in tau decay and their impact on the determination of alpha_s
• Determination of QCD condensates from tau-decay data

Cited by in corpus (1)

• Contribution from Duality Violations to the theoretical error on alpha_s