Photoproduction of Neutral Kaons on Liquid Deuterium Target Kabi Bantawa and D. M. Manley Kent State University ץ + n  K0 +Λ With decays: K0  π0.

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Presentation transcript:

Photoproduction of Neutral Kaons on Liquid Deuterium Target Kabi Bantawa and D. M. Manley Kent State University ץ + n  K0 +Λ With decays: K0  π0 + π0 Λ  π0 + n π0  ץ + ץ Net reaction: ץ + n  6ץ + n

Flow Chart of Analysis:

Kinematic Fit and Confidence Level: KF is a least-square Fit CL = 1-(INT f(א) dx2

Detector Efficiency Using the MC Acceptance Values:

Detector Efficiency for a Background Reaction

Invariant Mass of 2ץ from all 6-Cluster Events (Possible Combination of 6ץ to yield a π0 ) ץ+ ץ = π0

Invariant Mass of 4 Photons 4 photons from decay of KS using a 25% CL in the Kinematic fit.

Z-Vertex from Kinematic Fit

Distance Travelled by K0 and Λ Cτ = 2.68 cm Cτ = 7.89 cm

Tagging Efficiency of Glasgow Tagger

Photon Flux Variation with Eץ

Total Cross Section of the Background K0Σ+ Channel

Comparison Total Cross Section K0Σ+

Subtraction Ratios = Length of Prompt Window / Length of Random Widow Random Window Random Window Poly fit Poly. fit

Random / Prompt Subtraction

Background Subtraction

Time-of-Flight of TAPS vs. CB Energy

Variation of the Invariant Mass Squared with Momentum

Variation of Beta with Momentum