id,summary,reporter,owner,description,type,status,priority,milestone,component,version,resolution,keywords,cc 378,B0 mixing leads to crash,Frank Siegert,Frank Siegert,"We see a crash when enabling mixing of neutral mesons (e.g. B0) by adding the following lines in `Decaydata.db/HadronConstants.dat`: {{{ x_B = 0.776 y_B = 0.0 Mixing_B = 1 }}} The problem seems to be happening in `Hadron_Decay_Handler::FillDecayTree` with the removal of the non-mixed decay blob from the bloblist (`if (*bit==blob) p_bloblist->erase(bit);`). I don't see right away what is going wrong and don't have the time to follow up right now, so am reporting it here so that it is not lost. A simple run card to reproduce this together with the changes in `/share/SHERPA-MC/Decaydata.db` above is: {{{ (run){ EVENTS = 10000 BEAM_1 = 2212; BEAM_ENERGY_1 = 4000; BEAM_2 = 2212; BEAM_ENERGY_2 = 4000; MI_HANDLER = None MASSIVE[5]=1 }(run) (processes){ Process 93 93 -> 5 -5 93{0} Order (*,2); CKKW sqr(30/E_CMS) End process; }(processes) }}}",defect,new,major,rel-2.3.0,Hadron Decays,2.2.4,,,