ΔS=2 and ΔC=2 bag parameters in the standard model and beyond from N$_f$=2+1+1 twisted-mass lattice QCD

By N. Carrasco, P. Dimopoulos, R. Frezzotti, V. Lubicz, G. Rossi, S. Simula, C. Tarantino. 2015

144 citations recorded by the source corpus.

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).

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/19ee4adc9798556bfcaf7a43a142a02040d8982d

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In Nuclear and High Energy Physics

1. Rainer Sommer
2. Stephen R. Sharpe
3. M. Morte
4. A. Vladikas
5. P. Dimopoulos
6. S. Simula
7. C. Bernard
8. S. Gottlieb

Citations in the corpus

• Review of lattice results concerning low-energy particle physics (2016, methodology): “For QCD with Nf = 2 + 1 + 1 there is now a published calculation from the ETM Collaboration [42]; updated results forNf = 2+1 have been reported by several collaborations, i.”