Measurement of the B -> pi l nu Branching Fraction and Determination of |Vub| with Tagged B Mesons
The BABAR Collaboration, B. Aubert
Abstract
We report a measurement of the B -> pi l nu branching fraction based on 211 fb-1 of data collected with the BABAR detector. We use samples of B0 and B+ mesons tagged by a second B meson reconstructed in a semileptonic or hadronic decay, and combine the results assuming isospin symmetry to obtain BF(B0 -> pi- l+ nu) = (1.33 +/- 0.17(stat) +/- 0.11(syst)) x 10-4. We determine the magnitude of the Cabibbo-Kobayashi-Maskawa matrix element |Vub| by combining the partial branching fractions measured in ranges of the momentum transfer squared and theoretical calculations of the form factor. Using a recent lattice QCD calculation, we find |Vub| = (4.5 +/- 0.5(stat) +/- 0.3(syst) +0.7/-0.5(FF)) x 10-3, where the last error is due to the normalization of the form factor.
Create a lesson
Related papers
Accelerating Optical Photon Simulation in DUNE with Opticks
Ilker Parmaksiz, Aaron Higuera, Laura Paulucci et al.
Search for high-mass resonances in photon-jet final states using 140 fb-1 of pp collisions at s = 13 TeV with the ATLAS detector
ATLAS Collaboration
Efficient binned profile likelihood minimization for precision measurements with RABBIT
David Walter, Josh Bendavid, Kenneth Long
A Weighting Method for Incorporating Mass Resolution Effects in Amplitude Analysis
Benhou Xiang, Wenqian Zheng, Hongxun Yang et al.
A High Performance Partial Wave Analysis Framework for Hadron Spectroscopy
Benhou Xiang, Shuangshi Fang, Beijiang Liu
Measurement of tZq inclusive and differential cross-sections in pp collisions at s = 13~TeV with the ATLAS detector
ATLAS Collaboration