We compute non-perturbatively the B-parameters of the complete basis of four-fermion operators needed to study the Kaon oscillations in the SM and in its supersymmetric extension. We perform numerical simulations with two dynamical maximally twisted sea quarks at three values of the lattice spacing on configurations generated by the ETMC. Unwanted operator mixings and O(a) discretization effects are removed by discretizing the valence quarks with a suitable OsterwalderSeiler variant of the Twisted Mass action. Operators are renormalized non-perturbatively in the RI/MOM scheme. Our preliminary result for B^RGI_K is 0.73(3)(3).
Kaon oscillations in the Standard Model and Beyond using Nf=2 dynamical quarks / V., Bertone; Dimopoulos, Petros; R., Frezzotti; G. C., Rossi; A., Vladikas; V., Gimenez; D., Palao; V., Lubicz; S., Simula; F., Mescia; Papinutto, MAURO LUCIO. - In: POS PROCEEDINGS OF SCIENCE. - ISSN 1824-8039. - ELETTRONICO. - LATTICE2009:(2010). (Intervento presentato al convegno The XXVII International Symposium on Lattice Field Theory (LAT2009) tenutosi a Beijing, China) [10.22323/1.091.0258].
Kaon oscillations in the Standard Model and Beyond using Nf=2 dynamical quarks
DIMOPOULOS, PETROS;PAPINUTTO, MAURO LUCIO
2010
Abstract
We compute non-perturbatively the B-parameters of the complete basis of four-fermion operators needed to study the Kaon oscillations in the SM and in its supersymmetric extension. We perform numerical simulations with two dynamical maximally twisted sea quarks at three values of the lattice spacing on configurations generated by the ETMC. Unwanted operator mixings and O(a) discretization effects are removed by discretizing the valence quarks with a suitable OsterwalderSeiler variant of the Twisted Mass action. Operators are renormalized non-perturbatively in the RI/MOM scheme. Our preliminary result for B^RGI_K is 0.73(3)(3).I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
