Matching the heavy-quark fields in QCD and HQET at four loops

Andrey G. Grozin, Peter Marquard, Alexander V. Smirnov, Vladimir A. Smirnov, Matthias Steinhauser

Результат исследования: Научные публикации в периодических изданияхстатьярецензирование

3 Цитирования (Scopus)


The QCD/HQET matching coefficient for the heavy-quark field is calculated up to four loops. It must be finite; this requirement produces analytical results for some terms in the four-loop on-shell heavy-quark field renormalization constant which were previously only known numerically. The effect of a nonzero lighter-flavor mass is calculated up to three loops. A class of on-shell integrals with two masses is analyzed in detail. By specifying our result to QED, we obtain the relation between the electron field and the Bloch-Nordsieck field with four-loop accuracy.

Язык оригиналаанглийский
Номер статьи054008
Число страниц22
ЖурналPhysical Review D
Номер выпуска5
СостояниеОпубликовано - 1 сент. 2020


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