Work

Perturbative calculation of O(a) improvement coefficients

Year: 2003

Type: article

Abstract: We compute several coefficients needed for $O(a)$ improvement of currents in perturbation theory, using the Brodsky-Lepage-Mackenzie prescription for choosing an optimal scale ${q}^{*}.$ We then compare the results to non-perturbative calculations. Normalization factors of the vector and axial vector currents show good agreement, especially when allowing for small two-loop effects. On the other hand, there are large discrepancies in the coefficients of $O(a)$ improvement terms. We suspect that they arise primarily from power corrections inherent in the nonperturbative methods.

Source: Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields

DOI: 10.1103/physrevd.67.014503

Authors: Junpei Harada, Shoji Hashimoto, Andreas S. Kronfeld, Tetsuya Onogi

Institutions: Hiroshima University, High Energy Accelerator Research Organization, Fermi National Accelerator Laboratory, Kyoto University, Yukawa Institute for Theoretical Physics

Language: Latvian

Topic: Quantum Chromodynamics and Particle Interactions

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

OpenAlex ID: W2090919449

FWCI: 0.898

Cites: 24

Cited by: 8

Related to: 10