$SU(2)\times U(1)$ gauge invariance and the shape of new physics in rare $B$ decays

Benjamin Grinstein; Jorge Martin Camalich; Rodrigo Alonso

arxiv: 1407.7044 · v1 · pith:3IFZA7HKnew · submitted 2014-07-25 · ✦ hep-ph

SU(2)times U(1) gauge invariance and the shape of new physics in rare B decays

Rodrigo Alonso , Benjamin Grinstein , Jorge Martin Camalich This is my paper

classification ✦ hep-ph

keywords physicsdecaysgaugeoperatorsconstraintsinvariancerarescale

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New physics effects in $B$ decays are routinely modeled through operators invariant under the strong and electromagnetic gauge symmetries. Assuming the scale for new physics is well above the electro-weak scale, we further require invariance under the full Standard-Model gauge symmetry group. Retaining up to dimension-6 operators, we unveil new constraints between different new-physics operators that are assumed to be independent in the standard phenomenological analyses. We illustrate this approach by analyzing the constraints on new physics from rare $B_{q}$ (semi-)leptonic decays.

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