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Editorial discussion of Physics and Detector CDR.
CDR Editors Email List: cepc-cdr-dp-editors@maillist.ihep.ac.cn
CEPC detector CDR meeting
Thursday, July 19, 2018 from 21:00 to 23:55 (Asia/Shanghai)
by Vidyo
Attending: Charlie Young, Fulvio Piccinini, Gang Li, Jianming Qian, Joao, Kaili Zhang, Liantao Wang, Mingrui Zhao, Tong Li, Yaquan Fang, Boxiang Yu, Zhaoru Zhang, Zhijun Liang, Zian Zhu,
1. Liantao introduced the status of Chapter 2 OVERVIEW OF THE PHYSICS CASE
Liantao said that he has a editing group with 10 people to work on this section.
1) Jianming concerned that there is some overlap with the later sections, for example the plots for higgs coupling is shown again in physics section. Liantao and Joao thought it’s fine, since we have to mention what physics we can do at the beginning of this chapter. The plot in this section is using the fit, and it is an overview description, the analysis will come later. Just make sure the plots are coincident with the later one. Also FCC has the similar statement. Liantao said he saw the FCC physics section, actually our draft is in better shape.
2) Liantao didn’t mention any analysis in this chapter. But it is fine. And for QCD sub-section, it is the standard part for electron collider. The electroweak physics only has the results of the fit. A small section on this is still missing and Liantao will work with Fulvio and others to get this done. These details will go into the later part of the CDR in chapter 11.
3) For flavor physics, Liantao said the problem is he didn’t have any research on it, and the citation is quite few. If someone has any information for flavor physics, Liantao can add it. It was decided that he will write a simple chapter with a couple pages with at least the obvious statements about the number of events we will have for flavor physics: B, charm, and tau. This is importnat in the context of the chinese physics interests.
2. Joao go thourgh the structure of Chapter 3
1) Charlie clarified his comments for this chapter that we should firstly mention the physics requirement at beginning.
2) Liantao suggested to have an overall introduction for this chapter. We should specify what we want to achieve before introduce the condition.
3) For chapter 3.1, the contents more focus on the measurement, not real experimental condition. We should mention for example the beam conditions, and beam backgrounds.
4) For chapter 3.2, there is no parameters and quantified description. Jianming said he will add them later. Charlie said we should explain why we pick these numbers.
5) On section 3.3.1, the baseline detector, Joao thought that we should mention the advantages of the particle flow detector in a section immediately before the baseline detector. This is because PFA is a general idea that can apply to several concepts. Charlie thought it is fine, because the PF calorimeter is baseline.
6) Joao proposed that the full silicon concept be made into a sub-section of the baseline concept because they share pretty much everything else. Charlie didn’t agree with the structure, since the dimension for calorimeter in full silicon concept may be changed, we should treat it as a independent concept. We didn't have a final agreement on this and still need the text for the FST concept.
7) People in general think we should not be naming the detector at this point but we leave this for a discussion later since it should include higher level people.
3. Status for Chapter10 and 11
Yaquan said most of the contents for these two chapter are there.
1) Check whether the physics requirement are included.
2) Jianming said the Higgs section later needs ~3 days editing/cleanup.
3) For EWK section, Liantao said that the chapter 11.2 is missing the note for how we do the parameter fit. He will add this part and circulate in his group.
4) For EWK section, an expert from ATLAS W mass measurement is helping with this section. For some parameter, they will make sure the parameter is coincident with accelerator side. They will update the text by end of this month.
5) Charlie will try to review these two chapters during these two days.
4. General comments from Charlie
Charlie said for some chapters, the description are not clear enough, so the reader may be confused. Some areas have lots of details because peoople feel those are importnat work then did, but the most important is to pass a clear message. The CDR is for the reader, not for the writers.
Charlie proposes to ask for some people not in our research group, and therefore more free to make radical changes, to read the text and edit it uniformly taking into account the outside reader prespective. A the end the CDR will be public to everyone.
Charlie will read now chapter 10, and proceed afterwards to chapter 11. We expect to have the full set of comments from Charlie before Monday.