Hadronic vacuum polarization using gradient flow

Hadronic vacuum polarization using gradient flow

A bstract The gradient-flow operator product expansion for QCD current correlators including operators up to mass dimension four is calculated through NNLO. This paves an alternative way for efficient lattice evaluations of hadronic vacuum polarization functions. In addition, flow-time evolution equ...

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Veröffentlicht in:The journal of high energy physics 2020-08, Vol.2020 (8), p.1-30, Article 109
Hauptverfasser: Harlander, Robert V., Lange, Fabian, Neumann, Tobias
Format: Artikel
Sprache:eng
Schlagworte:
Classical and Quantum Gravitation
Elementary Particles
Lattice QCD
Perturbative QCD
Physics
Physics and Astronomy
Quantum Field Theories
Quantum Field Theory
Quantum Physics
Regular Article - Theoretical Physics
Relativity Theory
Renormalization Group
String Theory
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Zusammenfassung:A bstract The gradient-flow operator product expansion for QCD current correlators including operators up to mass dimension four is calculated through NNLO. This paves an alternative way for efficient lattice evaluations of hadronic vacuum polarization functions. In addition, flow-time evolution equations for flowed composite operators are derived. Their explicit form for the non-trivial dimension-four operators of QCD is given through order α s 3 .
ISSN:1029-8479
1029-8479
DOI:10.1007/JHEP08(2020)109