Light Quark Mass Effects in Bottom Quark Mass Determinations

Abstract

Recent results for charm quark mass effects in perturbative bottom quark mass determinations from $\Upsilon$ mesons are reviewed. The connection between the behavior of light quark mass corrections and the infrared sensitivity of some bottom quark mass definitions is examined in some detail.Comment: Invited talk presented at RADCOR-2000, Carmel, CA, Sep. 2000; 15 pages, latex, 3 postscript figures; eliminated typo in Eq.(3