Search for B+ --> mu+ nu_mu with inclusive reconstruction at BaBar
The BABAR Collaboration: B. Aubert, et al

TL;DR
This study searches for the rare leptonic decay of B mesons into muons and neutrinos using the BaBar dataset, employing an inclusive reconstruction method to set an upper limit on its branching fraction.
Contribution
It introduces an inclusive reconstruction approach to search for B+ to mu+ nu_mu decays and provides a new upper limit on its branching fraction.
Findings
Set a 90% CL upper limit of 1.3 x 10^{-6} on the branching fraction.
Utilized a fully inclusive method with the highest momentum lepton identification.
Analyzed approximately 426 fb^{-1} of BaBar data.
Abstract
We search for the purely leptonic decay in the full BaBar dataset, having an integrated luminosity of approximately 426 fb. We adopt a fully inclusive approach, where the signal candidate is identified by the highest momentum lepton in the event and the companion is inclusively reconstructed without trying to identify its decay products. We set a preliminary upper limit on the branching fraction of at the 90% confidence level, using a Bayesian approach.
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Taxonomy
TopicsParticle physics theoretical and experimental studies · Superconducting Materials and Applications · Particle Accelerators and Free-Electron Lasers
