Speaker
Florian Urs Bernlochner
(KIT - Karlsruhe Institute of Technology (DE))
Description
The precision determination of the CKM matrix element $|V_{cb}|$ from
semileptonic $B \to D^*$ and $B \to D$ decays provides an important input to test
the unitarity of the CKM matrix and search for new physics. In recent
analyses, higher values of $|V_{cb}|$ were extracted using (the so-called BGL)
form factor parametrization, which allows more freedom to describe the
experimental spectra. We develop a systematic approach to assess the
role of the truncation order of the form factor parametrization, and
study its impact on the extracted value of $|V_{cb}|$. In addition, we survey
the current status of $|V_{cb}|$ extractions and their compatibility with heavy
quark symmetry.
Authors
Florian Urs Bernlochner
(KIT - Karlsruhe Institute of Technology (DE))
Zoltan Ligeti
(Lawrence Berkeley National Lab. (US))
Dean Robinson
(UC Santa Cruz/ LBL)
