[measurements] Some LEP measurement updates (#122)

* Added missing INSPIRE reference

Data was added in 2019, but the value is the same in the 2020 PDG

* Add LEP measurements of Z and W leptonic decay

flavio/data/measurements.yml

@@ -5939,6 +5939,16 @@ A_l SLD:
  [1.0, 0.007],
  [1.0]]
 
+LEP Z leptonic decay:
+ experiment: LEP
+ inspire: ALEPH:2005ab
+ description: Table 7.1
+ values:
+ Gamma(Z->nunu): 165.8 +- 0.8 e-3 # Width per neutrino species without assuming LFU
+ Gamma(Z->ee): 83.92 +- 0.12 e-3
+ Gamma(Z->mumu): 83.99 +- 0.18 e-3
+ Gamma(Z->tautau): 84.08 +- 0.22 e-3
+
 LHCb W->lnu 2016:
  experiment: LHCb
  inspire: Aaij:2016qqz
@@ -6023,10 +6033,14 @@ OPAL Z LFV:
 LEP W->leptons:
  experiment: LEP
  inspire: Schael:2013ita
+ description: Table 5.5 and Equations (5.2)-(5.4)
  values:
  BR(W->enu): 10.71 ± 0.16 e-2
  BR(W->munu): 10.63 ± 0.15 e-2
  BR(W->taunu): 11.38 ± 0.21 e-2
+ Rmue(W->lnu): 0.993 +- 0.019
+ Rtaue(W->lnu): 1.063 +- 0.027
+ Rtaumu(W->lnu): 1.070 +- 0.026
 
 PDG W width:
  inspire: Patrignani:2016xqp
@@ -7738,7 +7752,7 @@ ISTRA+ Kl3 2003:
  RT(K->pimunu): -0.0007(71)
 
 PDG Lambda->plnu:
- inspire:
+ inspire: Zyla:2020zbs
  values:
  g1/f1(Lambda->penu): -0.718(15)