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1. Zhijun will discuss with Gang offline to understand the feasibility to re-simulate WW->lvqq in ZH runs and Z->bb in Z pole with new geometry and 3T magnetic field .
2. Peizhu present a detailed study of jet energy scale Gang will provide the B_likelihood cut value for 80% and 90% working point,
Peizhu will try 80% and 90% B tag working points for vetoing heavy flavor for Z->jj calibration.
3. Maarten suggest that Peizhu could try to use truth photon veto to remove ISR events,
Peizhu will also look into Veto cut efficiency
4. Maarten suggested to make a Profile of E_reco/Etruth Vs E_truth in Peizhu's slide 7 - slide 9
5. Bo Li present the correlations of B likelihood between leading jet and sub-leading jet in 2D plot.
He agree look into conditional B likelihood distribution. (eg: B likelihood distribution of leading pT jet , in condition of sub-leading pT jet with B_likelihood >0、>0.6 、>0.7 >0.8…0.9 )
He will present the C_c and C_usd (correlations factors ) next meeting.
6. For AFB measurement, Mengran will re-simulate 100k Z->mumu fullsim events, to understand angular distribution with new geometry and 3T magnetic field .
He will generated 10M~100M fastsim for Z->mumu and Z->tautau to understand background and event-by-event weak mixing angle fitting.
7.Peixun presented beam energy spread effect in WW threshold run and its impact to W mass measurement.
Peixun agreed to optimize data taking plan for WW threshold scan. (assuming 3.2 ab-1 data on WW threshold scan runs).
We discussed about the optimization priority. We agreed that W mass optimization has higher priority and W width optimization
Peixun also presented J/psi production cross section in Z pole.
Bo Liu commented that J/Psi and phi are produced in very forward region, and the statistics is not high, it may be difficult to use them for PFA or jet energy calibration.