Simple explanation of strong suppression of fermionic EFT operators and custodial symmetry breaking

Adolfo Guevara, Fernando Alvarado, Juan José Sanz Cillero

The present approach relies on the SM chiral symmetry breaking pattern $SU(2{)}_L\otimes SU(2{)}_R\to SU(2{)}_{L+R}$, with the EW Goldstone bosons given in a non-linear realization and t…