PoS - Proceedings of Science
Volume 334 - The 36th Annual International Symposium on Lattice Field Theory (LATTICE2018) - Standard Model Parameters and Renormalization
Test of factorization for the long-distance effects from charmonium in $B\rightarrow K\ell^+\ell^-$
K. Nakayama*, S. Hashimoto  on behalf of JLQCD Collaboration
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Published on: May 29, 2019
We report on a calculation of the charmonium contribution to the decay $B \rightarrow K\ell^+\ell^-$ using lattice simulations with 2+1 flavors of Mobius domain wall fermions.
We focus on the region of $q^2$ below the $J/\psi$ resonance and test the factorization approximation to estimate the amplitude.
We show a possible discrepancy between lattice calculation and factorization method for the non-factorizable contribution.
DOI: https://doi.org/10.22323/1.334.0221
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