2017/05/15 by Lubej, Matic
#FOS: Physical sciences #High Energy Physics - Experiment (hep-ex)
paper · doi:10.48550/arxiv.1705.05289
Semileptonic B meson decays involving low-mass charged leptons e or μ are expected to be free of non-Standard Model contributions and therefore play a critical role in determinations of \vert Vub \vert and \vert Vcb \vert. Of all the CKM matrix parameters, \vert Vub \vert is the least precisely measured and in most need of additional studies in order to better constrain the apex of the Unitarity Triangle. We focus on exclusive reconstruction of charmless semileptonic B meson decay B → πℓ ν, and present prospects and estimates for measuring \vert Vub \vert at Belle II with the full planned dataset of 50~ab-1 of integrated luminosity.