ΔS=2 and ΔC=2 bag parameters in the SM and beyond from Nf=2+1+1 twisted-mass LQCD

Abstract

We present unquenched lattice QCD results for the matrix elements of four-fermion operators relevant to the description of the neutral K and D mixing in the Standard Model and its extensions. We have employed simulations with Nf = 2 + 1 + 1 dynamical sea quarks at three values of the lattice spacings in the interval 0.06 - 0.09 fm and pseudoscalar meson masses in the range 210 - 450 MeV. Our results are extrapolated to the continuum limit and to the physical pion mass. Renormalization constants have been determined non-perturbatively in the RI-MOM scheme. In particular, for the Kaon bag-parameter, which is relevant for the \overline{K}^0-K^0 mixing in the Standard Model, we obtain B_K^{RGI} = 0.717(24).

Added comments to error budget discussion; fig.19 corrected. Version to appear in PRD

References in corpus (14)

• Light hadrons from lattice QCD with light (u,d), strange and charm dynamical quarks
• Current status of the Standard Model CKM fit and constraints on $\Delta F=2$ New Physics
• Implications of D^0-\bar D^0 Mixing for New Physics
• $K_L-K_S$ mass difference from lattice QCD
• D-Dbar mixing and new physics: general considerations and constraints on the MSSM
• Computing K and D meson masses with N_f = 2+1+1 twisted mass lattice QCD
• K^0-\bar K^0 mixing beyond the standard model and CP-violating electroweak penguins in quenched QCD with exact chiral symmetry
• Lessons from Recent Measurements of D-\bar D Mixing
• BK-parameter from Nf = 2 twisted mass lattice QCD
• Neutral kaon mixing beyond the standard model with nf=2+1 chiral fermions
• Charm mixing in the Standard Model and beyond
• Charm as a domain wall fermion in quenched lattice QCD
• Perturbative renormalization factors and O(a^2) corrections for lattice 4-fermion operators with improved fermion/gluon actions
• Calculation of BSM Kaon B-parameters using Staggered Quarks

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