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arxiv: hep-ph/9911461 · v1 · submitted 1999-11-23 · ✦ hep-ph

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Charm Effects in the bar{MS} Bottom Quark Mass from Upsilon Mesons

A. H. Hoang (CERN) , A. V. Manohar (UC , San Diego)
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classification ✦ hep-ph
keywords massquarkcharmshiftupsilonaffectsbottomcancellation
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We study the shift in the $\Upsilon$ mass due to a non-zero charm quark mass. This shift affects the value of the $\bar{\rm MS}$ $b$-quark mass extracted from the $\Upsilon$ system by about -20 MeV, due to an incomplete cancellation of terms that are non-analytic in the charm quark mass. The precise size of the shift depends on unknown higher order corrections, and might have a considerable uncertainty if they are large.

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    Renormalon resummation with a holomorphic timelike coupling yields estimates for b and c quark pole masses and related hadronic parameters from MS-bar inputs and known series coefficients.