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CEPC Physics and detector regular meeting
Wednesday, January 10, 2018 from 15:00 to 17:00 (Asia/Shanghai)
at IHEP ( A511 )
Attending：Joao, Manqi, Zhijun, Gang, Huirong, Feipeng,
Vidyo: Tao, Haijun, Franco, Paolo, Patrizia, Roberto
1. Introduction from Joao
We should get a compeleted new version before the end of this month. After that, we have two month before the review, every group should talk with each other.
2. Physics and simulation
Yaquan said that they tested the impact of magnetic field from 3.5T to 3T with several processes: H->bb,cc,gg, H->mumu, also test the impact on b-tagging. Since the time is limited and they only have the signal sample with 3T now, or these new results, for the new version CDR, they will just focus on the impact, without full simulation study.
Joao said that we can not only mention the impact, also the mixture contents of the results with both 3T and 3.5T looks not professional. He prefer to get the full results with 3T, so the convenor should decide which process to be put with new results.
Based on Joao's suggestion, Yaquan suggested to generate the background for H->mumu now, to make sure we can have a completed results for 3T.
At the same time, the electroweak part should also have some contents. Joao said that this work will be responsible by Zhijun. The EWK contents can includes the performance study with fast simulation.
3. TPC
Huirong said that they had uploaded the new version to Git. For this new version, they add some new parts and revise other chapters, also some chapters need to be revised and polished soon.
4. CALO
Tao said for ECAL, they change changed to the new geometry with 15 by 15. Now the simulation is matched with it and some problems need to be fixed. For example, the time resolution for SiPM has no problem, but for the sintalletor, they need more study. They try to get new reult soon. And for HCAL, they rewited some detailed parts. Tao said they plan to submit the new version before Jan 20.
Also Roberto said that they will continue talk with Chinese group, to make sure the same timescale and unification of the contents.
5. Magnet:
Manqi suggested to add some paragraph for 2.5 T magnet field.
6. Common issues:
For the TTbar case, temporary we decided to ignore it, however, the IAC suggested to consider it. So we need to discuss again on the Steering Committee Group meeting.