New B0 -> 4pi phase space CP model: LHCBGAUSS-1614.EvtGenExtras
See Jira ticket for more detailed description, LHCBGAUSS-1614
To also propagate to master and Sim09-upgrade branches.
See Jira ticket for more detailed description, LHCBGAUSS-1614
To also propagate to master and Sim09-upgrade branches.