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alpha(s) Determination from Tau Decays: Theoretical Status
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alpha(s) Determination from Tau Decays: Theoretical Status
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| Pich Zardoya, Antonio Perfil | |||
| This document is a artículoDate2010 | |||
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Este documento está disponible también en : http://hdl.handle.net/10550/42515 |
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| The total tau hadronic width can be accurately calculated using analyticity and the operator product expansion. The result turns out to be very sensitive to the value of alpha_s(m_tau^2), providing a precise determination of the strong coupling constant. The theoretical description of this observable is updated, including the recently computed O(alpha_s^4) contributions. The experimental determination of alpha_s(m_tau^2) and its actual uncertainties are discussed. | |||
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Pich Zardoya, Antonio 2010 alpha(s) Determination from Tau Decays: Theoretical Status Acta Physica Polonica B 3 1 165 170 |
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