Bi-weekly meeting of Snowmass energy frontier topical group EF03 (top and heavy flavor production). We have time for updates from people working on Snowmass studies. We will also have plenty of time for discussion.
The meeting will be on zoom at https://msu.zoom.us/j/99445309904 The meeting password on zoom is 202021.
p7: very large difference, differences covered by systematic uncertainties in scale uncertainties in the predictions. This is why NNLO is important.
p9: b-production measurements at LHC are only from 7 TeV so far - hopefully people on ATLAS and CMS are working on this with 13 TeV data.
p10: first bin in right plot is terrible, not just high-pT tail - would need resummation included to get the first bin correct, threshold effect.
p10: matching procedure is to match b hadron to b-tagged jet, which has its uncertainties. There might be differences between b quark and b hadron.
- Important that PDF fitters have access to the full model of uncertainties, that there are no hidden ones.
- Tension between measurements by different experiments and/or different final states leads to lack of improvement in PDF fits
- Opportunities to study this at NNLO, various approximations available (in particular, use one PDF set to get k-factors, then apply that to other PDF sets.
- It’s clear what to do, but missing person power. The fast interfaces can be set up, but calculations will then need to be done to populate grids, and to compare to data and evaluate fits. For W+HF and Z+HF production
- Schedule a joint meeting with theory frontier to discuss these topics and the predictions, and how to make them available and what else might be coming soon.