paper

Matching of gauge invariant dimension 6 operators for and transitions

arXiv:1512.02830 · doi:10.1007/JHEP05(2016)037

Abstract

New physics realized above the electroweak scale can be encoded in a model independent way in the Wilson coefficients of higher dimensional operators which are invariant under the Standard Model gauge group. In this article, we study the matching of the gauge invariant dim-6 operators on the standard physics Hamiltonian relevant for and transitions. The matching is performed at the electroweak scale (after spontaneous symmetry breaking) by integrating out the top quark, , and the Higgs particle. We first carry out the matching of the dim-6 operators that give a contribution at tree level to the low energy Hamiltonian. In a second step, we identify those gauge invariant operators that do not enter transitions already at tree level, but can give relevant one-loop matching effects.

33 pages, 3 figures. Eqs. (3.13), (4.24)-(4.26) corrected

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