Please use this identifier to cite or link to this item:
http://hdl.handle.net/2307/399
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Constantinou, Martha | - |
dc.contributor.author | Lubicz, Vittorio | - |
dc.contributor.author | Panagopoulos, Haralambos | - |
dc.contributor.author | Skouroupathis, Apostolos | - |
dc.contributor.author | Stylianou, Fotos | - |
dc.date.accessioned | 2010-08-03T13:30:16Z | - |
dc.date.available | 2010-08-03T13:30:16Z | - |
dc.date.issued | 2009 | - |
dc.identifier.uri | http://hdl.handle.net/2307/399 | - |
dc.description.abstract | We calculate the corrections to the amputated Green's functions of 4-fermion operators, in 1-loop Lattice Perturbation theory. The novel aspect of our calculations is that they are carried out to second order in the lattice spacing, O(a^2). We employ the Wilson/clover action for massless fermions (also applicable for the twisted mass action in the chiral limit) and the Symanzik improved action for gluons. Our calculations have been carried out in a general covariant gauge. Results have been obtained for several popular choices of values for the Symanzik coefficients (Plaquette, Tree-level Symanzik, Iwasaki, TILW and DBW2 action). We pay particular attention to Delta F=2 operators, both Parity Conserving and Parity Violating (F stands for flavour: S, C, B). We study the mixing pattern of these operators, to O(a^2), using the appropriate projectors. Our results for the corresponding renormalization matrices are given as a function of a large number of parameters: coupling constant, clover parameter, number of colors, lattice spacing, external momentum and gauge parameter. The O(a^2) correction terms (along with our previous O(a^2) calculation of Z_Psi) are essential ingredients for minimizing the lattice artifacts which are present in non-perturbative evaluations of renormalization constants with the RI'-MOM method. A longer write-up of this work, including non-perturbative results, is in preparation together with members of the ETM Collaboration. | en |
dc.language.iso | en | en |
dc.publisher | PoS - Proceedings of Science | en |
dc.subject | Lattice QCD | en |
dc.subject | Renormalization | en |
dc.title | O(a^2) corrections to 1-loop matrix elements of 4-fermion operators with improved fermion/gluon actions | en |
dc.type | conferenceObject | en |
dc.subject.miur | Settori Disciplinari MIUR::Scienze fisiche::FISICA TEORICA, MODELLI E METODI MATEMATICI | en |
dc.subject.miur | Scienze fisiche | - |
dc.subject.isicrui | Categorie ISI-CRUI::Scienze fisiche::Physics | en |
dc.subject.isicrui | Scienze fisiche | - |
dc.subject.anagraferoma3 | Scienze fisiche | en |
dc.relation.pagenumber | 260 | en |
dc.identifier.url | http://pos.sissa.it/archive/conferences/091/260/LAT2009_260.pdf | - |
dc.relation.conferencename | Lattice 2009 - The XXVII International Symposium on Lattice Field Theory | en |
dc.relation.conferencedate | 2009-07-25 | - |
dc.relation.conferenceplace | Peking University, Beijing, China | en |
local.test | test | - |
dc.description.romatrecurrent | Dipartimento di Fisica 'Edoardo Amaldi' | * |
item.fulltext | With Fulltext | - |
item.grantfulltext | restricted | - |
item.languageiso639-1 | other | - |
Appears in Collections: | X_Dipartimento di Fisica 'Edoardo Amaldi' ATC - Atti di Convegno |
Files in This Item:
File | Description | Size | Format | Existing users please Login |
---|---|---|---|---|
71_LAT2009_260.pdf | 127.76 kB | Adobe PDF | Request a copy |
Page view(s)
86
Last Week
0
0
Last month
0
0
checked on Jul 2, 2024
Download(s)
11
checked on Jul 2, 2024
Google ScholarTM
Check
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.