Measurements of |Vub| at BaBar

The BaBar experiment, located at the Stanford Linear Accelerator Center (SLAC), produces millions of B mesons. The decays of the B mesons can be used to measure many elements of the Cabibbo-Kobayashi-Maskawa (CKM) matrix, which quantifies the quarks' flavor changing probabilities. One of the important and least known elements is |Vub|. Its value is not predicted by the Standard Model. Its measurement is a critical constraint on the Unitarity Triangle, and thus, on the Standard Model itself. Our knowledge of |Vub| comes from measurements of the small B → Xulv decay rates where a 'b' to 'u' quark transition is present. In these decays, the hadronic system in the final state can be reconstructed either inclusively or exclusively using tagged or untagged techniques. The precisions are limited by the uncertainties in the non-perturbative QCD calculations that are used to extract |Vub| from the measured decay rates. There are no new measurements from BaBar for this conference. However, in this talk, we highlight some features of the most recent ones and give you the references to all the BaBar measurements done so far in this field. We also summarize the state of the art of the |Vub| measurements and compare the direct experimental results with the values obtained by global fits to the Unitarity Triangle