We list in Table 10 the up-to-date upper limits on the tau LFV branching fractions.
Decay mode Category
90% CL Limit Exp. Ref.
Γ156 = e− γ lγ < 12.0 · 10−8 Belle [76] < 3.3 · 10−8 BaBar [43]
Γ157 = µ− γ < 4.5 · 10−8 Belle [76] < 4.4 · 10−8 BaBar [43]
Γ158 = e− π0 lP0 < 2.2 · 10−8 Belle [75] < 13.0 · 10−8 BaBar [35]
Γ159 = µ− π0 < 2.7 · 10−8 Belle [75] < 11.0 · 10−8 BaBar [35]
Γ162 = e− η < 4.4 · 10−8 Belle [75] < 16.0 · 10−8 BaBar [35]
Γ163 = µ− η < 2.3 · 10−8 Belle [75] < 15.0 · 10−8 BaBar [35]
Γ172 = e− η′(958) < 3.6 · 10−8 Belle [75] < 24.0 · 10−8 BaBar [35]
Γ173 = µ− η′(958) < 3.8 · 10−8 Belle [75] < 14.0 · 10−8 BaBar [35]
Γ160 = e− KS0 < 2.6 · 10−8 Belle [88] < 3.3 · 10−8 BaBar [41]
Γ161 = µ− KS0 < 2.3 · 10−8 Belle [88] < 4.0 · 10−8 BaBar [41]
Γ174 = e− f0(980) l S0 < 3.2 · 10−8 Belle [87]
Γ175 = µ− f0(980) < 3.4 · 10−8 Belle [87]
Γ164 = e− ρ0 l V0 < 1.8 · 10−8 Belle [86] < 4.6 · 10−8 BaBar [39]
Γ165 = µ− ρ0 < 1.2 · 10−8 Belle [86] < 2.6 · 10−8 BaBar [39]
Γ168 = e− K*(892)0 < 3.2 · 10−8 Belle [86] < 5.9 · 10−8 BaBar [39]
Γ169 = µ− K*(892)0 < 7.2 · 10−8 Belle [86] < 17.0 · 10−8 BaBar [39]
Γ170 =
e−
K *(892)0 < 3.4 · 10−8 Belle [86] < 4.6 · 10−8 BaBar [39]
Γ171 =
µ−
K *(892)0 < 7.0 · 10−8 Belle [86] < 7.3 · 10−8 BaBar [39]
Γ176 = e− φ < 3.1 · 10−8 Belle [86] < 3.1 · 10−8 BaBar [39]
Γ177 = µ− φ < 8.4 · 10−8 Belle [86] < 19.0 · 10−8 BaBar [39]
Γ166 = e− ω < 4.8 · 10−8 Belle [86] < 11.0 · 10−8 BaBar [38]
Γ167 = µ− ω < 4.7 · 10−8 Belle [86] < 10.0 · 10−8 BaBar [38]
Γ178 = e− e+ e− lll < 2.7 · 10−8 Belle [77] < 2.9 · 10−8 BaBar [82]
Γ181 = µ− e+ e− < 1.8 · 10−8 Belle [77] < 2.2 · 10−8 BaBar [82]
Γ179 = e− µ+ µ− < 2.7 · 10−8 Belle [77] < 3.2 · 10−8 BaBar [82]
Γ183 = µ− µ+ µ− < 2.1 · 10−8 Belle [77] < 3.3 · 10−8 BaBar [82]
Γ182 = e− µ+ e− < 1.5 · 10−8 Belle [77] < 1.8 · 10−8 BaBar [82]
Γ180 = µ− e+ µ− < 1.7 · 10−8 Belle [77] < 2.6 · 10−8 BaBar [82]
Γ184 = e− π+ π− lhh < 2.3 · 10−8 Belle [89] < 12.0 · 10−8 BaBar [32]
Γ186 = µ− π+ π− < 2.1 · 10−8 Belle [89] < 29.0 · 10−8 BaBar [32]
Γ188 = e− π+ K− < 3.7 · 10−8 Belle [89] < 32.0 · 10−8 BaBar [32]
Γ194 = µ− π+ K− < 8.6 · 10−8 Belle [89] < 26.0 · 10−8 BaBar [32]
Γ189 = e− K+ π− < 3.1 · 10−8 Belle [89] < 17.0 · 10−8 BaBar [32]
Γ195 = µ− K+ π− < 4.5 · 10−8 Belle [89] < 32.0 · 10−8 BaBar [32]
Γ192 = e− K+ K− < 3.4 · 10−8 Belle [89] < 14.0 · 10−8 BaBar [32]
Γ198 = µ− K+ K− < 4.4 · 10−8 Belle [89] < 25.0 · 10−8 BaBar [32]
Γ191 = e− KS0 KS0 < 7.1 · 10−8 Belle [88]
Γ197 = µ− KS0 KS0 < 8.0 · 10−8 Belle [88]
Γ185 = e+ π− π− (L) < 2.0 · 10−8 Belle [89] (L) < 27.0 · 10−8 BaBar [32]
Γ187 = µ+ π− π− (L) < 3.9 · 10−8 Belle [89] (L) < 7.0 · 10−8 BaBar [32]
Γ190 = e+ π− K− (L) < 3.2 · 10−8 Belle [89] (L) < 18.· 10−8 BaBar [32]
Γ196 = µ+ π− K− (L) < 4.8 · 10−8 Belle [89] (L) < 22.0 · 10−8 BaBar [32]
Γ193 = e+ K− K− (L) < 3.3 · 10−8 Belle [89] (L) < 15.0 · 10−8 BaBar [32]
Γ199 = µ+ K− K− (L) < 4.7 · 10−8 Belle [89] (L) < 48.0 · 10−8 BaBar [32]
Γ211 = π− Λ Λ h < 3.0 · 10−8 Belle [74] < 5.8 · 10−8 BaBar [79]
Γ212 =
π−
Λ < 2.8 · 10−8 Belle [74] < 5.9 · 10−8 BaBar [79]
Γxx = K− Λ < 4.2 · 10−8 Belle [74] < 15.· 10−8 BaBar [79]
Γxx =
K−
Λ < 3.1 · 10−8 Belle [74] < 7.2 · 10−8 BaBar [79]