|
| | | | |
| | | |
| Stat |
Members: 3664
Articles: 2'599'751
Articles rated: 2609
27 December 2024 |
|
| | | | |
|
Article overview
| |
|
|
Perturbative Corrections for Staggered Fermion Bilinears | | Apoorva Patel
; Stephen Sharpe
; | | Date: |
30 Oct 1992 | | Journal: | Nucl.Phys. B395 (1993) 701-732 | | Subject: | hep-lat | | Abstract: | We calculate the perturbative corrections to fermion bilinears that are used in numerical simulations when extracting weak matrix elements using staggered fermions. This extends previous calculations of Golterman and Smit, and Daniel and Sheard. In particular, we calculate the corrections for non-local bilinears defined in Landau gauge with gauge links excluded. We do this for the simplest operators, i.e. those defined on a $2^4$ hypercube, and for tree level improved operators which live on $4^4$ hypercubes. We also consider gauge invariant operators in which the ``tadpole’’ contributions are suppressed by projecting the sums of products of gauge links back in to the gauge group. In all cases, we find that the variation in the size of the perturbative corrections is smaller than those with the gauge invariant unimproved operators. This is most strikingly true for the smeared operators. We investigate the efficacy of the mean-field method of Lepage and Mackenzie at summing up tadpole contributions. In a companion paper we apply these results to four-fermion operators. | | Source: | arXiv, hep-lat/9210039 | | Services: | Forum | Review | PDF | Favorites | |
|
|
No review found.
Did you like this article?
Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.
|
| |
|
|
|
REGISTER