Počet záznamů: 1
Fermion flavor mixing in models with dynamical mass generation
0343075 - UJF-V 2011 RIV US eng J - Článek v odborném periodiku
Fermion flavor mixing in models with dynamical mass generation.
Physical Review D: Particles, Fields, Gravitation and Cosmology. Roč. 81, č. 6 (2010), 065029/1-065029/13 ISSN 1550-7998
Výzkumný záměr: CEZ:AV0Z10480505
Klíčová slova: weak interactions * particle physics * neutrino masses
Kód oboru RIV: BE - Teoretická fyzika
Impakt faktor: 4.964, rok: 2010
We present a model-independent method of dealing with fermion flavor mixing in the case when instead of constant, momentum-independent mass matrices one has rather momentum-dependent self-energies. This situation is typical for strongly coupled models of dynamical fermion mass generation. We demonstrate our approach on the example of quark mixing. We show that quark self-energies with a generic momentum dependence lead to an effective Cabibbo-Kobayashi-Maskawa matrix, which turns out to be in general nonunitary, in accordance with previous claims of other authors, and to nontrivial flavor changing electromagnetic and neutral currents. We also discuss some conceptual consequences of the momentum-dependent self-energies and show that in such a case the interaction basis and the mass basis are not related by a unitary transformation. In fact, we argue that the latter is merely an effective concept, in a specified sense.
Trvalý link: http://hdl.handle.net/11104/0185637