XLVII International Meeting on Fundamental Physics

Standard Model fermion corrections to the Electroweak Chiral Lagrangian at one-loop level

Not scheduled

30m

Centro Cultural Isabel de Farnesio, Aranjuez, Madrid (Spain)

Coffee break + Poster session

Speaker

Carlos Quezada Calonge (Universidad Complutense de Madrid)

Description

We consider an effective non-linear Electroweak Chiral Lagrangian containing three would-be Goldstone bosons: $\omega^a$ which transform non-linearly as a triplet under $SU(2)_L \times SU(2)_R $ and a Higgs singlet $h$ plus its couplings to fermions via Yukawa interactions. This low energy model is valid for the range $M_h,M_W,M_Z \ll s \ll 4 \pi v \simeq 3$ TeV.

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Since the nex-to-leading order corrections due to fermion loops are proportional to the mass of the fermion we have performed the calculation for the heaviest fermion: top quark. We present both the finite and divergent part to the one-loop contribution, finding an agreement with other authors for the latter.