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Chiral behavior of the B(s,d)-Bbar(s,d) mixing amplitude in the Standard Model and beyond
Damir Becirevic, Svjetlana Fajfer, Jernej Kamenik
We compute the chiral logarithmic corrections to the Bd and Bs mixing amplitudes in the Standard Model and beyond. We then investigate the impact of the inclusion of the lowest-lyi…
Search for New Physics in Rare D Decays
Svjetlana Fajfer, Sasa Prelovsek
In many extensions of the standard model an additional up-like heavy quark appears. Its appearance induces flavour changing neutral current transition in the up-quark region at the…
Chiral loop corrections to strong decays of positive and negative parity charmed mesons
Svjetlana Fajfer, Jernej Kamenik
We consider chiral loop corrections to the effective couplings which describe the strong interactions of two heavy mesons of even or odd parities and a light pseudoscalar meson, wi…
b to d d s bar transition and constraints on new physics in B^- decays
Svjetlana Fajfer, Jernej Kamenik, Nejc Kosnik
The b to d d s bar transition gives extremely small branching ratios within the standard model, thus providing an appropriate ground for testing new physics. Using renormalization…
Note on helicity amplitudes in D to V semileptonic decays
Svjetlana Fajfer, Jernej Kamenik
Motivated by the recent extraction of the helicity amplitudes for the D+ -> K*0bar mu+ nu decay, done by the FOCUS collaboration, we determine helicity amplitudes for the D+ -> K*0…