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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.accessioned2021-02-04T20:06:40Z
dc.date.available2021-02-04T20:06:40Z
dc.date.issued2013-01-01
dc.identifier.issn1824-8039
dc.identifier.doihttp://dx.doi.org/10.34944/dspace/5954
dc.identifier.urihttp://hdl.handle.net/20.500.12613/5972
dc.description.abstractWe study matrix elements of the "chromomagnetic" operator on the lattice. This operator is contained in the strangeness-changing effective Hamiltonian which describes electroweak effects in the Standard Model and beyond. Having dimension 5, the chromomagnetic operator is characterized by a rich pattern of mixing with other operators of equal and lower dimensionality, including also non gauge invariant quantities; it is thus quite a challenge to extract from lattice simulations a clear signal for the hadronic matrix elements of this operator. We compute all relevant mixing coefficients to one loop in lattice perturbation theory; this necessitates calculating both 2-point (quark- Antiquark) and 3-point (gluon-quark- Antiquark) Green's functions at nonzero quark masses. We use the twisted mass lattice formulation, with Symanzik improved gluon action. For a comprehensive presentation of our results, along with detailed explanations and a more complete list of references, we refer to our forthcoming publication [1].
dc.format.extent316-
dc.relation.haspartProceedings of Science
dc.rights.urihttps://creativecommons.org/licenses/by-nc-sa/3.0/
dc.subjecthep-lat
dc.subjecthep-lat
dc.titleThe 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.updated2021-02-04T20:06:37Z
refterms.dateFOA2021-02-04T20:06:40Z


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