Kaon_LT Experiment

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2023 Oct 16 (Notes from CT Leakage Meeting)

Attendance: Alicia P., Ali U., Garth H., Richard T.

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Cointime Leakage Issue

- Ali was updated on the bifurcation seen in beta vs CT

- The bifurcation needs to be cut out and corrected with a beta efficiency

- A consistent beta cut needs to be applied for all runs (heep included)

- Use 8.2 data as a reference to check what good data looks like

- Nathan suggested it may be a rate dependent correction so such a beta efficiency may need to be applied setting by setting

- It is a beta correction not CT (they are correlated), but a cut in beta will also apply to CT

- CT is based off the SHMS reference time so HMS should be correlated to this

- Ali can add the beta efficiency to the report file to check the possible rate dependence

	- In CT vs beta: Three boxes...

	- Around central peak

	- Lower bifurcation

	- Upper streak

- This will require a MM cut for each particle type, a CT cut, and possibly randoms

- CT vs MM plot binned in cuts of beta may help to pick a good "box" for each scenario

- Maybe combine upper+lower and apply cut in CT vs MM. Then compare ratio of this upper+lower and central peak to all data, respectively.

- Make sure PID also included

Next Steps

- Everything will need to be replayed after this

	- This will include new offset values

	- Out of plane offsets is not fully resolved yet

		- Possibly find from Pmy?

- Ali will work on report file and Richard will finish up offsets. Then a new replay of all data will be done.