Shu's weekly group discussion
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Asia/Shanghai
Tsung-Dao Lee Institute/N6F-N630 - Smart Classroom (Tsung-Dao Lee Institute)
Tsung-Dao Lee Institute/N6F-N630 - Smart Classroom
Tsung-Dao Lee Institute
Also at Room 603, New Science Building #5, Minhang Campus
15
Description
点击链接入会，或添加至会议列表：
https://cern.zoom.us/j/4042031778
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Speaker: Bai-Hong Zhou (TDLI, SJTU)
Today's focus:
[ssWW]:- Plot the LL/LX/ssWW sig vs bkg score in WZCR with Mjj reweighting for WZ QCD;
- Presented the ParT results to weekly analysis meeting;
[Hyy*]:
- Updated the combination results with new workspace provided;
- Summary of all the updated materials is still on going;
Plans:
[ssWW]:
- Check the systematics impact for ParT;
- Check if necessary to include the third/forth jet information;
- Begin to look the neutrino reconstruction in ssWW analysis;
[Hyy*]:
- Summarize all the updated combination results and share the materials in mattermost;
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Speaker: Zhiyu Zhao (TDLI, SJTU)
Today's focus:
[STCF EMC]:- Through optical simulations, I studied how different intrinsic crystal properties affect the timing resolution. I found that:
- The sensor coverage area and the crystal size are the dominant factors limiting the current detector’s timing resolution, followed by the scintillation decay time; the wavelength shifter has the smallest impact.
- Moreover, the relative contributions from the sensor area and the crystal size increase with energy.
- I studied the timing response of CsI crystals to different types of particles（γ/n/e/μ）, as timing information can be used for particle identification. For calorimeters, the most important application is neutral (n/γ) discrimination. I provided a preliminary estimate of the timing-resolution requirement for (n/γ) separation: at 100 MeV, to achieve efficient (n/γ) discrimination using only the EMC, the timing resolution should reach about 300 ps.
- In the experiment, I used a short-pass optical filter to remove slow photons while retaining fast photons. The measured timing resolution for MIPs (~30 MeV) can reach 0.59 ns; in comparison, the timing resolution without the filter is 1.34 ns. A great progress.
[DarkSHINE ECAL simulation]:
- Using the refactored simulation code, I studied the detector performance under different conditions, including effective light yield, energy threshold, beam spot size, detector dimensions, and so on. This work will also be included as supplementary material in my PhD dissertation.
Plans:
- [STCF EMC] : Study the uniformity of the experimentally measured timing resolution for particles incident at different positions.
- Through optical simulations, I studied how different intrinsic crystal properties affect the timing resolution. I found that:
