Speaker
Description
We give a general prescription for the transformation between four-fermion effective operator bases via corrected Fierz identities at the one-loop level. The procedure has the major advantage of only relating physical operators between bases, eliminating the necessity for Fierz-evanescent operators, thereby reducing the number of operators which enter in higher-order EFT computations. Additionally, when performing basis changes using loop-corrected Fierz identities, the dependence on renormalization scheme factorizes between the two bases, implying that such transformations simultaneously change renormalization scheme along with the operator basis. We illustrate the utility of loop-corrected Fierz identities in flavor physics through several examples of BSM phenomenology.
| Collaboration / Activity | University of Zurich |
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