The ILC detectors are preparing to start TDR in the next year or two. For this we need to answer a couple of difficult questions convincingly. We'll have to justify the choices for all of the detector parameters. We haven't really changed them since the LOI in 2009. That was before the discovery of the Higgs boson. We'll need to take a good look at them again and study if they are still optimal and how much small changes affect the physics reach of the experiment. For this, we need to build new tools to better understand the connection between the detector parameters and the measurement precision. In a PFA detector, the reconstruction is a big part of the detector concept. I'm interested in studying the performance of the reconstruction under both physical and computational aspects.
In no particular order, here are a few things we already know that need work.
- Vertex reconstruction and flavor tagging:
- How does it perform with more background?
- Is the innermost layer at the right distance from the IP?
- What changes are needed to implement gaseous cooling?
- Silicon tracking
- What are the current limitations of the tracking, and can we overcome it with a pixel tracker?
- What can be gained from a different aspect ratio?
- Calorimetry
- How big of an advantage does digital calorimetry have over analog?
- What's the right size for the readout?
I'm sure there will be other questions that come up during the year. I look forward to working on these and other items with a motivated and capable scientist who will join us at PNNL. Let's roll up our sleeves.
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