Experimental review on moment analyses

Moments of photon energy spectrum in B → Xsγ decays, of hadronic mass spectrum and of lepton energy spectrum in B → Xclν decays are sensitive to the masses of the heavy quarks as well as to the non-perturbative parameters of the heavy quark expansion. Several measurements have been performed both at the Υ(4S) resonance and at Z center of mass energies. They provide constraints on the non-perturbative parameters, give a test of the consistency of the theoretical predictions and of the underlying assumptions and allow to reduce the indetermination in the |Vcb| extraction.