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Volumn 78, Issue 5, 2008, Pages

High-precision charm-quark mass and QCD coupling from current-current correlators in lattice and continuum QCD

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EID: 53349151444     PISSN: 15507998     EISSN: 15502368     Source Type: Journal    
DOI: 10.1103/PhysRevD.78.054513     Document Type: Article
Times cited : (209)

References (54)
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    • The error on the r1 quoted in this paper, r1=0.321(5)fm, includes estimates of all errors involved in simulating the upsilons. This value has been extensively checked in many other calculations: see, for example, for 11 other calculations that verify this value with precisions ranging from 1.5% to 3%.
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    • One might worry about large nonperturbative contributions to the ηc mass from cc̄→gluons→cc̄ coming, for example, from mixing between the ηc and a nearby glueball. Such an effect is largely ruled out by the fact that our simulation (which does not allow such mixing) gives the correct masses for both the ηc and the ψ. In particular, the difference between their masses in the simulation agrees with experiments to within ±5MeV, which is less than 0.2% of the ηc's mass.
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