Published May 2020
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Matching the heavy-quark fields in QCD and HQET at four loops
Creators
- 1. Novosibirsk State University (Russian Federation)
- 2. Budker Institute of Nuclear Physics, Novosibirsk (Russian Federation)
- 3. Deutsches Elektronen–Synchrotron (DESY), Zeuthen (Germany)
- 4. Moscow State University (Russian Federation). Research Computing Center
- 5. Moscow State University (Russian Federation). Skobeltsyn Institute of Nuclear Physics
- 6. Karlsruher Institut für Technologie (KIT), Karlsruhe (Germany). Institute für Theoretische Teilchenphysik
Description
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 non-zero 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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Additional details
Identifiers
- arXiv
- arXiv:2005.14047;
Publishing Information
- Imprint Pagination
- 20 p.
- ISSN
- 0418-9833
- Report number
- DESY--20-092
INIS
- Country of Publication
- Germany
- Country of Input or Organization
- Germany
- INIS RN
- 52032467
- Subject category
- S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
- Descriptors DEI
- B QUARKS; C QUARKS; FLAVOR MODEL; QUANTUM CHROMODYNAMICS; QUANTUM ELECTRODYNAMICS; RENORMALIZATION; T QUARKS
- Descriptors DEC
- BEAUTY PARTICLES; CHARM PARTICLES; COMPOSITE MODELS; ELECTRODYNAMICS; ELEMENTARY PARTICLES; FERMIONS; FIELD THEORIES; MATHEMATICAL MODELS; PARTICLE MODELS; POSTULATED PARTICLES; QUANTUM FIELD THEORY; QUARK MODEL; QUARKS; TOP PARTICLES
Optional Information
- Secondary number(s)
- SAGEX--20-14