| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1835258 | Nuclear and Particle Physics Proceedings | 2015 | 4 Pages |
Abstract
An energy scan near the τ pair production threshold has been performed using the BESIII detector. About 24 pb−1 of data, distributed over four scan points, was collected. This analysis is based on τ pair decays to ee, eμ, eh, μμ, μh, hh, eρ, μρ and πρ final states, where h denotes a charged π or K. The mass of the τ lepton is measured from a maximum likelihood fit to the τ pair production cross section data to be , which is currently the most precise value in a single measurement.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Nuclear and High Energy Physics
