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Two-loop electroweak top corrections: are they under control?
G. Degrassi, S. Fanchiotti, F. Feruglio +2
The assumption that two-loop top corrections are well approximated by the contribution is investigated. It is shown that in the case of the ratio neutral-to-charge…
Heavy Meson Hyperfine Splitting: A Complete Calculation
N. Di Bartolomeo, F. Feruglio, R. Gatto +1
The hyperfine splittings and are analyzed in the framework of an effective lagrangian…
On the coupling of heavy mesons to pions in QCD
P. Colangelo, A. Deandrea, N. Di Bartolomeo +3
We compute the strong coupling constant , with and respectively pseudoscalar and vector heavy mesons by using the QCD sum rules approach. Our computation is…
The Physics of the Chiral Fermions
Ferruccio Feruglio
We review the aspects of chiral gauge theories related to the violation of the decoupling property. The case of the top quark is worked out in detail. The mechanism of anomaly canc…