Show simple item record

dc.creatorConstantinou, M
dc.creatorCosta, M
dc.creatorFrezzotti, R
dc.creatorLubicz, V
dc.creatorMartinelli, G
dc.creatorMeloni, D
dc.creatorPanagopoulos, H
dc.creatorSimula, S
dc.date.accessioned2021-02-03T19:34:47Z
dc.date.available2021-02-03T19:34:47Z
dc.date.issued2014-01-01
dc.identifier.issn1824-8039
dc.identifier.doihttp://dx.doi.org/10.34944/dspace/5894
dc.identifier.urihttp://hdl.handle.net/20.500.12613/5912
dc.description.abstract© Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike Licence. The Chromomagnetic operator (CMO) mixes with a large number of operators under renormal-ization. We identify which operators can mix with the CMO, at the quantum level. Even in dimensional regularization (DR), which has the simplest mixing pattern, the CMO mixes with a total of 9 other operators, forming a basis of dimension-five, Lorentz scalar operators with the same flavor content as the CMO. Among them, there are also gauge noninvariant operators; these are BRST invariant and vanish by the equations of motion, as required by renormalization theory. On the other hand using a lattice regularization further operators with d ≤ 5 will mix; choosing the lattice action in a manner as to preserve certain discrete symmetries, a minimul set of 3 additional operators (all with d < 5) will appear. In order to compute all relevant mixing coefficients, we calculate the quark-antiquark (2-pt) and the quark-antiquark-gluon (3-pt) Green's functions of the CMO at nonzero quark masses. These calculations were performed in the continuum (dimensional regularization) and on the lattice using the maximally twisted mass fermion action and the Symanzik improved gluon action. In parallel, non-perturbative measurements of the K - π matrix element are being performed in simulations with 4 dynamical (Nf = 2 + 1 + 1) twisted mass fermions and the Iwasaki improved gluon action.
dc.relation.haspartProceedings of Science
dc.rights.urihttps://creativecommons.org/licenses/by-nc-sa/3.0/
dc.subjecthep-lat
dc.subjecthep-lat
dc.titlePerturbative and non-perturbative renormalization results of the chromomagnetic operator on the lattice
dc.typeArticle
dc.type.genreConference Proceeding
dc.ada.noteFor Americans with Disabilities Act (ADA) accommodation, including help with reading this content, please contact scholarshare@temple.edu
dc.date.updated2021-02-03T19:34:45Z
refterms.dateFOA2021-02-03T19:34:48Z


Files in this item

Thumbnail
Name:
1412.1718v1.pdf
Size:
214.4Kb
Format:
PDF

This item appears in the following Collection(s)

Show simple item record

https://creativecommons.org/licenses/by-nc-sa/3.0/
Except where otherwise noted, this item's license is described as https://creativecommons.org/licenses/by-nc-sa/3.0/