4 papers · 1 filter
New Dipole Penguin Contribution to K --> pi pi decays
Jan O. Eeg, Kresimir Kumericki, Ivica Picek
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,…
Soft gluon contributions to the B --> K eta' amplitude in a low energy bosonization model
J. O. Eeg, K. Kumericki, I. Picek
Intriguing B --> K eta' decays provide a unique opportunity to study a joining of two-gluon configurations arising from the penguin b --> sG and b --> sGG transitions, with those i…
Nucleon strangeness as the response to a strangeness-sensitive probe in a class of hadron models
D. Klabucar, K. Kumericki, B. Melic +1
On top of its valence quarks, the full nucleon ground state may contain appreciable admixture of s-\bar{s} pairs already at small momentum transfers. This paper discusses strangene…
Long vs. short distance dispersive two-photon K_L \to μ^+ μ^- amplitude
J. O. Eeg, K. Kumericki, I. Picek
We report on the calculation of the two-loop electroweak, two-photon mediated short-distance dispersive K_L \to μ^+μ^- decay amplitude. QCD corrections change the sign of this cont…