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Fermion flavor mixing in models with dynamical mass generation
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SYSNO ASEP 0343075 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Fermion flavor mixing in models with dynamical mass generation Tvůrce(i) Beneš, Petr (UJF-V) Zdroj.dok. Physical Review D: Particles, Fields, Gravitation and Cosmology. - : American Physical Society - ISSN 1550-7998
Roč. 81, č. 6 (2010), 065029/1-065029/13Poč.str. 13 s. Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova weak interactions ; particle physics ; neutrino masses Vědní obor RIV BE - Teoretická fyzika CEZ AV0Z10480505 - UJF-V (2005-2011) UT WOS 000276195700112 DOI 10.1103/PhysRevD.81.065029 Anotace 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. Pracoviště Ústav jaderné fyziky Kontakt Markéta Sommerová, sommerova@ujf.cas.cz, Tel.: 266 173 228 Rok sběru 2011
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