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

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

Abstract:
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.

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Verlagsausgabe §
DOI: 10.5445/IR/1000124630
Veröffentlicht am 10.11.2020
Originalveröffentlichung
DOI: 10.1103/PhysRevD.102.054008
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Zitationen: 5
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Zugehörige Institution(en) am KIT Institut für Theoretische Teilchenphysik (TTP)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2020
Sprache Englisch
Identifikator ISSN: 2470-0010, 2470-0029
KITopen-ID: 1000124630
Erschienen in Physical review / D
Verlag American Physical Society (APS)
Band 102
Heft 5
Seiten Art.Nr. 054008
Vorab online veröffentlicht am 08.09.2020
Externe Relationen Abstract/Volltext
Nachgewiesen in Web of Science
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