Speaker
Mr
Eric Persson
(University of Bonn)
Description
We investigate the role of different schemes in deciding at what order to truncate form factor expansions for semileptonic decays and how to determine the appropriate combination of truncations when multiple form factors are involved. The specific choice of truncation orders can significantly impact the reported values of exclusive $|V_{cb}|$. Additionally, we explore whether and how unitarity bounds, which provide a straightforward method for regularizing overfitting of form factors, may introduce bias in measurements. We formulate a set of suggestions on how LHCb and Belle II should treat this subject in future measurements.
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Author
Mr
Eric Persson
(University of Bonn)
Co-authors
Dean Robinson
(Lawrence Berkeley National Laboratory (LBL))
Florian Urs Bernlochner
(University of Bonn (DE))
Markus Tobias Prim
(University of Bonn (DE))
Zoltan Ligeti
(Lawrence Berkeley National Lab. (US))
