Abstract
We analyze the factorization to subleading power in the flavor changing neutral current process \( \overline{B}\to {X}_s{\ell}^{+}{\ell}^{-} \). In particular, we compute the so-called resolved contributions and explore the numerical impact on observables. In these contributions the virtual photon couples to light partons instead of connecting directly to the effective weak-interaction vertex. They represent an irreducible uncertainty in the inclusive \( \overline{B}\to {X}_s{\ell}^{+}{\ell}^{-} \) decay which cannot be removed by relaxing the experimentally necessary cuts in the hadronic mass spectrum.
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Benzke, M., Hurth, T. & Turczyk, S. Subleading power factorization in \( \overline{B}\to {X}_s{\ell}^{+}{\ell}^{-} \) . J. High Energ. Phys. 2017, 31 (2017). https://doi.org/10.1007/JHEP10(2017)031
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DOI: https://doi.org/10.1007/JHEP10(2017)031