Investigating bounds on decoherence in quantum mechanics via B and   D-mixing
  We investigate bounds on decoherence in quantum mechanics by studying $B$ and $D$-mixing observables, making use of many precise new measurements, particularly from the LHC and B factories. In that respect we show that the stringent bounds obtained by a different group in 2013 rely on unjustified assumptions. Finally, we point out which experimental measurements could improve the decoherence bounds considerably. 
Alexander Lenz, David Hodges, Daniel Hulme, Sandra Kvedaraite, Jack   Richings, Jian Shen Woo and Philip Waite
hep-ph hep-ex