Kaon mixing beyond the SM from N-f=2 tmQCD and model independent constraints from the UTA
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Kaon mixing beyond the SM from N-f=2 tmQCD and model independent constraints from the UTA

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Kaon mixing beyond the SM from N-f=2 tmQCD and model independent constraints from the UTA

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dc.contributor.author Bertone, V.
dc.contributor.author Carrasco Vela, Nuria
dc.contributor.author Ciuchini, M.
dc.contributor.author Dimopoulos, P.
dc.contributor.author Frezzotti, R.
dc.contributor.author Giménez Gómez, Vicente
dc.contributor.author Lubicz, V.
dc.contributor.author Martinelli, Guido
dc.contributor.author Mescia, Federico
dc.contributor.author Papinutto, Mauro
dc.contributor.author Rossi, G.C.
dc.contributor.author Silvestrini, L.
dc.contributor.author Simula, S.
dc.contributor.author Tarantino, C.
dc.contributor.author Vladikas, A.
dc.date.accessioned 2014-02-19T10:42:15Z
dc.date.available 2014-02-19T10:42:15Z
dc.date.issued 2013
dc.identifier.uri http://dx.doi.org/10.1007/JHEP03(2013)089
dc.identifier.uri http://hdl.handle.net/10550/33086
dc.description.abstract We present the first unquenched, continuum limit, lattice QCD results for the matrix elements of the operators describing neutral kaon oscillations in extensions of the Standard Model. Owing to the accuracy of our calculation on Delta S = 2 weak Hamiltonian matrix elements, we are able to provide a refined Unitarity Triangle analysis improving the bounds coming from model independent constraints on New Physics. In our non-perturbative computation we use a combination of N-f = 2 maximally twisted sea quarks and Osterwalder-Seiler valence quarks in order to achieve both O(a)-improvement and continuum-like renormalization properties for the relevant four-fermion operators. The calculation of the renormalization constants has been performed non-perturbatively in the RI-MOM scheme. Based on simulations at four values of the lattice spacing and a number of quark masses we have extrapolated/interpolated our results to the continuum limit and physical light/strange quark masses.
dc.relation.ispartof Journal of High Energy Physics, 2013, vol. 03, num. 3, p. 089-1 -089-53
dc.rights.uri info:eu-repo/semantics/openAccess
dc.source Bertone, V. Carrasco Vela, Nuria Ciuchini, M. Dimopoulos, P. Frezzotti, R. Giménez Gómez, Vicente Lubicz, V. Martinelli, G. Mescia, Federico Papinutto, Mauro Rossi, G.C. Silvestrini, L. Simula, S. Tarantino, C. Vladikas, A. 2013 Kaon mixing beyond the SM from N-f=2 tmQCD and model independent constraints from the UTA Journal of High Energy Physics 03 3 089-1 089-53
dc.subject Física
dc.title Kaon mixing beyond the SM from N-f=2 tmQCD and model independent constraints from the UTA
dc.type info:eu-repo/semantics/article
dc.date.updated 2014-02-19T10:42:15Z
dc.identifier.doi http://dx.doi.org/10.1007/JHEP03(2013)089
dc.identifier.idgrec 091296

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