A nonperturbative determination of C/sub A/ and the scaling of f/sub pi / and m/sup MS/

Collins, S., Davies, C. , Lepage, G.P. and Shigemitsu, J. (2002) A nonperturbative determination of C/sub A/ and the scaling of f/sub pi / and m/sup MS/. Nuclear Physics, Section B, Proceedings Supplements, 106-10, 783 -785. (doi: 10.1016/S0920-5632(01)01842-4)

Abstract

We calculate the O(a) improvement coefficient for the axial-vector current using the nonperturbative method proposed by the LANL group. Results for the coefficient in the range beta = 5.93 to 6.2 are presented. We find C/sub A/ is close to the 1-loop tadpole-improved perturbative value. In addition, scaling of the pseudoscalar decay constant and renormalised quark mass is improved compared to that obtained using the (larger) C/sub A/ values obtained by the ALPHA collaboration.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Shigemitsu, Prof Junko and Davies, Professor Christine
• Authors: Collins, S., Davies, C., Lepage, G.P., and Shigemitsu, J.
• Subjects: Q Science > QC Physics
• College/School: College of Science and Engineering > School of Physics and Astronomy
• Journal Name: Nuclear Physics, Section B, Proceedings Supplements
• Publisher: Elsevier BV
• ISSN: 0920-5632
• ISSN (Online): 1873-3832