Flavour-Changing Neutral Currents and Leptophobic Z' Gauge Bosons
| Autor: | David London, Karine Leroux |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2001 |
| Předmět: |
Quark
Physics Particle physics Gauge boson Nuclear and High Energy Physics 010308 nuclear & particles physics High Energy Physics::Lattice Hadron Flavour High Energy Physics::Phenomenology FOS: Physical sciences 01 natural sciences High Energy Physics - Phenomenology High Energy Physics - Phenomenology (hep-ph) 0103 physical sciences High Energy Physics::Experiment 010306 general physics Mixing (physics) Computer Science::Databases Lepton Gauge symmetry |
| Popis: | Leptophobic Z' gauge bosons can appear in models with an E_6 gauge symmetry. We show that flavour-changing neutral currents can be generated in some of these models due to the mixing of the ordinary d_R, s_R and b_R quark fields with the exotic h_R. Because the Z' does not couple to charged leptons, the constraints on the flavour-changing couplings U^{Z'}_{db} and U^{Z'}_{sb} are relatively weak. Indeed, B_q--Bbar_q mixing (q=d,s) can be dominated by Z' exchange, which will affect CP-violating rate asymmetries in B decays. Rare hadronic B decays can also be affected, while decays involving charged leptons will be unchanged. 11 pages, LaTeX, no figures |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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