Mattione Update 06012011

X(2000)⁰ Mass

• X(2000)⁰: The combination of tracks yielding a mass closest to the X(2000)⁰.
• 10000 generated events: ~49% reconstruction efficiency, was ~52% on b1pi wiki page.
• However, very significant high-mass tail.

Code as of 06/01/2011

π⁰ Mass

• π⁰: The combination of tracks yielding a mass closest to the π⁰.
• Significantly worse resolution than originally.

Code as of 06/01/2011

• π⁰: Original version on b1pi wiki page:

Original version on b1pi wiki page

γ Reconstruction

• γ's were reconstructed with p & E = 0 until a fix by David Lawrence this morning.
• For each of the generated photons that were matched with reconstructed photons, Δp (generated - reconstructed) vs generated p:

Code as of 06/01/2011, Δp (generated - reconstructed) vs generated p