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- W3088573894 abstract "Extending previous work on this subject, we evaluate the impact of vector-like fermions at next-to-leading order accuracy in models with a massive vector leptoquark embedded in the $SU(4)times SU(3)^primetimes SU(2)_Ltimes U(1)_X$ gauge group. Vector-like fermions induce new sources of flavor symmetry breaking, resulting in tree-level flavor-changing couplings for the leptoquark not present in the minimal version of the model. These, in turn, lead to a series of non-vanishing flavor-changing neutral-current amplitudes at the loop level. We systematically analyze these effects in semileptonic, dipole and $Delta F=2$ operators. The impact of these corrections in $bto snunu$ and $bto ctaunu$ observables are discussed in detail. In particular, we show that, in the parameter region providing a good fit to the $B$-physics anomalies, the model predicts a $10%$ to $50%$ enhancement of $mathcal{B}(Bto K^{(*)}nunu)$." @default.
- W3088573894 created "2020-10-01" @default.
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- W3088573894 date "2020-12-09" @default.
- W3088573894 modified "2023-10-10" @default.
- W3088573894 title "Vector leptoquarks beyond tree level. III. Vectorlike fermions and flavor-changing transitions" @default.
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- W3088573894 doi "https://doi.org/10.1103/physrevd.102.115015" @default.
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