Measurement of the quadratic slope parameter in the K_L -> 3π^0 decay Dalitz plot
arXiv:hep-ex/0106075 · doi:10.1016/S0370-2693(01)00861-9
Abstract
A value of (-6.1 +- 0.9_{stat} +- 0.5_{syst})*10^{-3} is obtained for the quadratic slope parameter h in the K_L -> 3π^0 decay Dalitz plot at the NA48 experiment at the CERN SPS. The result is based on 14.7*10^6 fully reconstructed K_L -> 3π^0 -> 6γdecays. This is the most precise measurement of any of the Dalitz plot slope parameters in the charged and neutral kaon decays so far.
13 pages, 3 figures, 2 tables