The chromomagnetic operator on the lattice

@inproceedings{Constantinou2014TheCO,
  title={The chromomagnetic operator on the lattice},
  author={Martha Constantinou and M. Leineker Costa and R. Frezzotti and V. Lubicz and Guido Martinelli and Davide Meloni and Haris Panagopoulos and S. Simula},
  year={2014}
}
We study matrix elements of the “chromomagnetic” operator on the lattice. This operator is contained in the strangeness-changing effective Hamiltonian which describes electroweak effects in the Standard Model and beyond. Having dimension 5, the chromomagnetic operator is characterized by a rich pattern of mixing with other operators of equal and lower dimensionality, including also non gauge invariant quantities; it is thus quite a challenge to extract from lattice s imulations a clear signal… 

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