Results on Tau Physics from BaBar
Eric Torrence (for the BaBar Collaboration)

TL;DR
This paper reviews recent tau physics results from BaBar, including limits on lepton-flavor violation, measurements of tau decay branching fractions, and tau lifetime, based on extensive data samples.
Contribution
It provides new upper limits on lepton-flavor violating tau decays and preliminary measurements of tau decay modes and lifetime using large datasets.
Findings
Upper limits on tau->lll decay branching fractions are (1-3) x 10^-7.
Measured tau lifetime is approximately 291 femtoseconds.
Tau decay branching fraction for tau- -> 3h- 2h+ nu is about 8.52 x 10^-4.
Abstract
Recent results on tau physics from BaBar are reviewed. Limits on lepton-flavor violation in the tau decay process tau->lll are presented based on 91.6 fb^1 of data. In all six decay modes considered, the numbers of events found in data are compatible with the background expectations, and upper limits on the branching fractions are set in the range (1-3) 10^-7 at 90% CL. A preliminary measurement of the five prong branching fraction based on 110.7 fb^-1 of data is presented with the result B(tau- -> 3h- 2h+ nu) = (8.52+/-0.09+/-0.40) 10^-4. A preliminary measurement of the tau lifetime based on 30 fb^-1 of data is presented where a lifetime of 290.8+/-1.5+/-1.6 fs is measured.
Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.
