Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1994-04-25
Phys.Lett. B329 (1994) 129-135
Physics
High Energy Physics
High Energy Physics - Phenomenology
8 pages, Latex A complete postscript file is available via anonymous ftp at ttpux2.physik.uni-karlsruhe.de (129.13.102.139) as
Scientific paper
10.1016/0370-2693(94)90528-2
We compute the renormalization mismatch displayed in 1--loop approximation by classically equivalent 4-quark operators and coming from different possible definitions of the $\gamma_5$ matrix in dimensional regularization. The result is then employed to study the effect of the various treatments of $\gamma_5$ upon the size of radiative corrections to 4-quark condensates in the QCD sum rules for $\rho$ and $A_1$ mesons. We find that a fully anticommuting $\gamma_5$ which automatically respects non-anomalous chiral Ward-Slavnov identities leads to considerably smaller corrections and reduces theoretical uncertainty in the QCD prediction for the $\tau$ hadronic decay rate.
Adam L.-E.
Chetyrkin K. G.
No associations
LandOfFree
Renormalization of 4-Quark Operators and QCD-Sum Rules does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Renormalization of 4-Quark Operators and QCD-Sum Rules, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Renormalization of 4-Quark Operators and QCD-Sum Rules will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-4438