Search for Second-Class Currents in tau- -> omega.pi-.nu_tau
The BABAR Collaboration: B. Aubert, et al
TL;DR
This paper searches for second-class currents in tau decays to omega pi nu, using a large dataset, and finds no evidence, setting an upper limit on their contribution.
Contribution
The study provides the first upper limit on second-class currents in tau to omega pi nu decays using BABAR data.
Findings
No evidence for second-class currents was observed.
An upper limit of 0.69% was set at 90% confidence level.
The result constrains theoretical models predicting second-class currents.
Abstract
We report an analysis of tau- decaying into omega.pi-.nu_tau with omega -> pi+pi-pi0 using a data sample containing nearly 320 million tau pairs collected with the BABAR detector at the PEP-II B-Factory. We find no evidence for second-class currents and we set an upper limit of 0.69% at 90% confidence level for the fraction of second-class currents in this decay mode.
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