Table 3.

A summary of the tight cuts applied to the data to produce a low background event sample

Variable	Cut range	Units
Tagged time	$-5<{\text{t}}_{{\pi }^0}<5$	ns
Coplanarity	$-30<\Delta \varphi <30$	Degree
Missing mass	$1850<{\text{M}}_{\mathrm{miss}}<2100$	MeV/c${}^2$
Cone angle	$0<{\theta }_{\mathrm{Cone}}<0.3$	Radian
Invariant mass	$110<{\text{M}}_{\mathrm{inv}}<160$	MeV/c${}^2$
Spectator momentum	$0<\left|{\mathrm{P}}_{\mathrm{spec}}\right|<200$	MeV/c