Limits for Excited ${{\boldsymbol \tau}}$ (${{\boldsymbol \tau}^{*}}$) from Single Production
INSPIRE search
These limits are from ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \tau}^{*}}{{\mathit \tau}}$ and depend on transition magnetic coupling between ${{\mathit \tau}}$ and ${{\mathit \tau}^{*}}$. All limits assume ${{\mathit \tau}^{*}}$ $\rightarrow$ ${{\mathit \tau}}{{\mathit \gamma}}$ decay. Limits from LEP are for chiral coupling, whereas all other limits are for nonchiral coupling, ${{\mathit \eta}_{{L}}}$ = ${{\mathit \eta}_{{R}}}$ = 1. In most papers, the limit is expressed in the form of an excluded region in the $\lambda −{\mathit m}_{{{\mathit \tau}^{*}}}$ plane. See the original papers.
