We present preliminary results on the of neutral kaon oscillations in extensions of the Standard Model. Using Nf = 2 maximally twisted sea quarks and Osterwalder-Seiler valence quarks, we achieve both O(a)-improvement and continuum-like renormalization pattern for the relevant fourfermion operators. We perform simulations at three values of the lattice spacing and extrapolate/interpolate our results to the continuum limit and physical light/strange quark mass. The calculation of the renormalization constants of the complete operator basis is performed nonperturbatively in the RI-MOM scheme.
K0 - K0 bar Mixing Beyond the SM from Nf=2 tmQCD / Dimopoulos, Petros; Martinelli, Guido; R., Frezzotti; G. C., Rossi; A., Vladikas; V., Gimenez; V., Lubicz; S., Simula; F., Mescia; Papinutto, MAURO LUCIO. - In: POS PROCEEDINGS OF SCIENCE. - ISSN 1824-8039. - ELETTRONICO. - LATTICE2010:(2011). (Intervento presentato al convegno The XXVIII International Symposium on Lattice Field Theory–LATTICE2010 tenutosi a Villasimius, Sardinia, Italy) [10.22323/1.105.0302].
K0 - K0 bar Mixing Beyond the SM from Nf=2 tmQCD
DIMOPOULOS, PETROS;MARTINELLI, Guido;PAPINUTTO, MAURO LUCIO
2011
Abstract
We present preliminary results on the of neutral kaon oscillations in extensions of the Standard Model. Using Nf = 2 maximally twisted sea quarks and Osterwalder-Seiler valence quarks, we achieve both O(a)-improvement and continuum-like renormalization pattern for the relevant fourfermion operators. We perform simulations at three values of the lattice spacing and extrapolate/interpolate our results to the continuum limit and physical light/strange quark mass. The calculation of the renormalization constants of the complete operator basis is performed nonperturbatively in the RI-MOM scheme.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
