BK-parameter from Nf = 2 twisted mass lattice QCD

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dc.contributor.authorConstantinou, M.
dc.contributor.authorDimopoulos, P.
dc.contributor.authorFrezzotti, R.
dc.contributor.authorJansen, K.
dc.contributor.authorGimenez, V.
dc.contributor.authorLubicz, V.
dc.contributor.authorMescia, Federico
dc.contributor.authorPanagopoulos, H.
dc.contributor.authorPapinutto, M.
dc.contributor.authorRossi, G. C.
dc.contributor.authorSimula, S.
dc.contributor.authorSkouroupathis, A.
dc.contributor.authorStylianou, F.
dc.contributor.authorVladikas, A.
dc.contributor.authorETM Collaboration
dc.date.accessioned2019-04-08T12:11:20Z
dc.date.available2019-04-08T12:11:20Z
dc.date.issued2011-01-01
dc.date.updated2019-04-08T12:11:20Z
dc.description.abstractWe present an unquenched N f = 2 lattice computation of the B K parameter which controls K 0 − ¯¯¯¯ K 0 oscillations. A partially quenched setup is employed with two maximally twisted dynamical (sea) light Wilson quarks, and valence quarks of both the maximally twisted and the Osterwalder-Seiler variety. Suitable combinations of these two kinds of valence quarks lead to a lattice definition of the B K parameter which is both multiplicatively renormalizable and O ( a ) improved. Employing the nonperturbative RI-MOM scheme, in the continuum limit and at the physical value of the pion mass we get B RGI K = 0.729 ± 0.030 , a number well in line with the existing quenched and unquenched determinations.
dc.format.extent20 p.
dc.format.mimetypeapplication/pdf
dc.identifier.idgrec623813
dc.identifier.issn1550-7998
dc.identifier.urihttps://hdl.handle.net/2445/131795
dc.language.isoeng
dc.publisherAmerican Physical Society
dc.relation.isformatofReproducció del document publicat a: https://doi.org/10.1103/PhysRevD.83.014505
dc.relation.ispartofPhysical Review D, 2011, vol. 83, num. 1, p. 014505
dc.relation.projectIDinfo:eu-repo/grantAgreement/EC/FP7/249309/EU//HPLQCD
dc.relation.urihttps://doi.org/10.1103/PhysRevD.83.014505
dc.rights(c) American Physical Society, 2011
dc.rights.accessRightsinfo:eu-repo/semantics/openAccess
dc.sourceArticles publicats en revistes (Física Quàntica i Astrofísica)
dc.subject.classificationFísica de partícules
dc.subject.classificationExperiments
dc.subject.otherParticle physics
dc.subject.otherExperiments
dc.titleBK-parameter from Nf = 2 twisted mass lattice QCD
dc.typeinfo:eu-repo/semantics/article
dc.typeinfo:eu-repo/semantics/publishedVersion

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