and split samples

We perform studies of the and masses by splitting the sample based on several criteria:

• Particle/anti-particle
• Pre/post Target Silicon runs³⁵
• momentum $p(\lc)$
• Soft pion momentum $p(\pion_s)$

The only systematic effect originates from splitting the data according to the momentum of the soft pion, $p(\pion_s)$, and only in the case of the . This effect is illustrated by the last two points in the top plot in sc_mass:split1. In this case, a systematic error of $0.21~\mevcc$survives.

 

Figure 6.11: and systematic errors from split samples. The solid and dashed lines are the measurement and statistical errors. Points 1 & 2 are for particle and antiparticle separately. Points 3 & 4 are for runs less than and greater than 9750. Points 5 & 6 split the sample at $\lsig = 7$. Points 7 & 8 split the sample in momentum at 70 . Points 9 & 10 split the sample in soft pion momentum at 5 .

sc_mass:split1