New Dipole Penguin Contribution to K → ππ decays

  • Jan O. Eeg, Krešimir Kumerički, Ivica Picek
  • Published 2008


We point out that the standard chromomagnetic penguin dipole operator has a counterpart corresponding to off-shell momenta for external quarks. By employing the chiral quark model, we show that this new dipole penguin operator has the same bosonisation as the standard Q6 operator. Accordingly, this new operator enlarges by ∼ 5 % the referent Q6 contribution… (More)


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