Table of Contents
Observation of interference in D+ semileptonic decay into Kpmn
Motivations for semileptonic charm physics
PPT Slide
The (Kp)mn is very accessible to experiment...
The FOCUS (Kp)mn signal
This decay is also very accessible to theory
Five observables are studied
Decay rate details
Form factor ratios as tests of LGT
What happened when we fit K*mn?
...and we found plenty
Nearly all the qV asymmetry was below the K* pole!
Developing an asymmetry through interference...
The Breit-Wigner interference would give the asymmetry a distinctive mass dependence
Angular momentum makes the prescription unique
For a small amplitude interference will dominate..
Studies of the acoplanarity-averaged interference
..but a broad resonant amplitude works just fine.
Dependence of asymmetry on cosql
Q2 dependence of asymmetry
Acoplanarity dependent interference terms
Acoplanarity dependence of the interference term
Mass dependence of the acoplanarity interference.
A note on our acoplanarity conventions
Saw apparent CP violation earlier. Was this it?
But surely an effect this large must have been observed before?
Did E791 see it?
BEATRICE??
Implications
The moral of the story....
Question slides
Resolution study
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