| Issue |
EPJ Web Conf.
Volume 137, 2017
XIIth Quark Confinement and the Hadron Spectrum
|
|
|---|---|---|
| Article Number | 06001 | |
| Number of page(s) | 9 | |
| Section | Section C: Heavy Quarks | |
| DOI | https://doi.org/10.1051/epjconf/201713706001 | |
| Published online | 22 March 2017 | |
https://doi.org/10.1051/epjconf/201713706001
Rare B meson decays on the lattice
Helmholtz-Institut für Strahlen- und Kernphysik (Theorie), Bethe Center for Theoretical Physics, Universität Bonn, D-53115 Bonn, Germany
a e-mail: aagadjanov@hiskp.uni-bonn.de
Published online: 22 March 2017
We discuss a framework for the measurement of the B → K* transition form factors in lattice simulations, when the K* eventually decays. The possible mixing of πK and ηK states is considered. We reproduce the two-channel analogue of the Lellouch-Lüscher formula, which allows one to extract the B → K*l+l− decay amplitude in the low-recoil region. Since the K* is a resonance, we provide a procedure to determine the form factors at the complex pole position in a process-independent manner. The infinitely-narrow width approximation of the results is also studied.
© The Authors, published by EDP Sciences, 2017
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