title: SU(2)×U(1) gauge invariance and the shape of new physics in rare B decays.
abstract: 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 electroweak scale, we further require invariance under the full standard model gauge symmetry group. Retaining up to dimension-six 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.
authors.affiliation: Department of Physics, University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093-0319, USA.
authors.forename: R
authors.initials: R
authors.lastname: Alonso
authors.affiliation: Department of Physics, University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093-0319, USA.
authors.forename: B
authors.initials: B
authors.lastname: Grinstein
authors.affiliation: Department of Physics, University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093-0319, USA and PRISMA Cluster of Excellence Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, 55128 Mainz, Germany.
authors.forename: J
authors.initials: J
authors.lastname: Martin Camalich