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Volumn 78, Issue 11, 2008, Pages

Realistic lattice determination of αs(MZ) revisited

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EID: 58149260249     PISSN: 15507998     EISSN: 15502368     Source Type: Journal    
DOI: 10.1103/PhysRevD.78.114504     Document Type: Article
Times cited : (88)

References (32)
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    • note
    • We have quoted, to be specific, the τ decay result of Ref., which contains a careful treatment of the small, but (for a precision determination) numerically important, D>4 operator product expansion contributions, the inconsistent treatment of which created unquantified theoretical systematic errors in a number of the earlier τ-decay-based analyses. The results of the fifth order fixed order perturbation theory analysis, 0.1185-0.0009+0.0014, and of the more model-dependent extension, 0.1180±0.0008, both reported in Ref., are compatible within errors with that of Ref., but are based on assumed, rather than fitted, values for the relevant D=6 and 8 operator product expansion contributions. The ranges corresponding to the two results of Ref., however, are fully contained within the range listed in the table.
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