K →π matrix elements of the chromomagnetic operator on the lattice

@inproceedings{Constantinou2014KM,
  title={K →π matrix elements of the chromomagnetic operator on the lattice},
  author={Martha Constantinou and Manuel J Costa and R. Frezzotti and Vittorio Lubicz and Guido Martinelli and Davide Meloni and Haralambos Panagopoulos and S. Simula},
  year={2014}
}
  • Martha Constantinou, Manuel J Costa, +5 authors S. Simula
  • Published 2014
  • Physics
  • We present the results of the first lattice QCD calculation of the $K \to \pi$ matrix elements of the chromomagnetic operator $O_{CM} = g\, \bar s\, \sigma_{\mu\nu} G_{\mu\nu} d$, which appears in the effective Hamiltonian describing $\Delta S = 1$ transitions in and beyond the Standard Model. Having dimension 5, the chromomagnetic operator is characterized by a rich pattern of mixing with operators of equal and lower dimensionality. The multiplicative renormalization factor as well as the… CONTINUE READING

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