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--- energy:qcd [2020/08/08 09:33] – [Topics] schmittm
+++ energy:qcd [2020/11/16 09:40] (current) – [Meetings] schmittm
@@ Line 7: / Line 7: @@
 This topical group covers the following: physics with jet and jet substructure, calculations of higher-order effects and their impact on precision QCD physics, measurements of the strong coupling constant and its running, measurements of quark masses, PDF fits and PDF-sensitive measurements, W/Z(+jets) boson production,  and techniques to improve accuracy of future MC event generators.
-There is a tight synergy with other groups, including [[energy:EF06]] and [[energy:EF07]].
+There is a strong synergy with other EF groups, including [[energy:EF06]] and [[energy:EF07]] and also the [[https://snowmass21.org/theory/precision|TF06 group on the Theory Frontier]].
 If you have a topic you feel would be of interest to the group, please contact the conveners: <[email protected]> <[email protected]>
@@ Line 14: / Line 14: @@
 =====Meetings=====
-Our meetings general take place on Mondays.  Recent meetings include:
+Our meetings generally take place on Mondays.  Recent meetings include:
   * May 18, 2020: [[https://indico.fnal.gov/event/43273/|Kick-off]]
   * June 1, 2020: [[https://indico.fnal.gov/event/43488/|Orientation: past and recent work.]]
@@ Line 20: / Line 20: @@
   * July 17,  2020: [[https://indico.fnal.gov/event/44315/|MC  event  generator uncertainties]]
   * Aug  3-4, 2020: [[https://indico.fnal.gov/event/44316/|Mini-workshop on non-perturbative uncertainties]]
+  * Aug 24, 2020: [[https://indico.fnal.gov/event/45073/|Letters of Intent]]
+  * Sep 21, 2020: [[https://indico.fnal.gov/event/45614/|Jet substructure]]
+  * Oct 12, 2020: [[https://indico.fnal.gov/event/45893/|LOI: alpha_S]]
+  * Oct 26, 2020: [[https://indico.fnal.gov/event/46101/|LOI: precision calculations]]
+The general link is [[https://indico.fnal.gov/category/1139/|here]].
 =====Topics=====
 Some (but not all) of the topics addressed by EF05:
-   * Measurements of alpha_<sub>S</sub>
+   * Measurements of alpha<sub>S</sub>
    * Parton Distribution Functions (together with [[energy:E06]])
    * Connections between the High-Luminosity LHC and e.g. the Electron-Ion Collider (EIC) (together with [[energy:EF07]])
@@ Line 32: / Line 37: @@
    * Non-perturbative aspects
    * MC Event Generators
+   * Quality of theory predictions for Higgs boson, top quark production, etc.
-Other topics include Lattice QCD, Connections to machine learning, jets and nuclear effects in lepton-ion scattering, precision calculations at small x<sub>Bj</sub>, Regge trajectories, etc.
+Other topics include Lattice QCD, Connections to machine learning, jets and nuclear effects in lepton-ion scattering, spin observables, precision calculations at small x<sub>Bj</sub>, Regge trajectories, etc.
+=====Big Questions / Topics for Study=====
+A number of questions are emerging from the discussions in [[https://indico.fnal.gov/category/1139/|EF05 Meetings]].  This is a partial list:
+  - What precision in alpha<sub>S</sub> can be reached by each future machine/experiment?
+  - The HEP and EIC communities should develop some joint benchmarks for PDFs.  (EIC accesses high x<sub>Bj</sub>)
+  - What is the evolution of jets as a function of energy at the EIC and at hadron colliders?  What can EIC jet studies learn from techniques developed at the LHC?
+  - Are jets universal?  How can we tell?  If not, how do we deal with non-universality in our hadronization models?
+  - How can we get more precise and robust systematic uncertainties?  How do experimental and theoretical uncertainties mix?
+  - What is a theoretical uncertainty (e.g. renormalization and factorization scales)?  How can "theoretical" uncertainties reported by experimentalists be decorrelated so that they can properly be taken into account?
+  - It is important to explore PDFs coming from lattice calculations.  Does the traditional PDF community need to provide guidance?
+  - We need a "Les Houches" accord on a realistic assessment of parton shower uncertainties (and correlations).  There are new ideas from the theory community about how to formulate these uncertainties.
+  - How do we keep separate tuning of ostensibly non-perturbative parameters such as h<sub>damp</sub> from perturbative physics which should be essentially parameter-free?
+  - What can we learn about non-perturbative physics using minimum-bias events at the LHC?
+  - How can we promote the analysis of Belle data to provide crucial information on non-perturbative QCD?
+  - What information (if any) can be extracted from neutrino data - i.e., data used to calibrate beam fluxes?
+  - Which spectra and measurements are most useful for constraining non-perturbative effects?
+  - What is a better way to analyze and study multiple-parton interactions (and the underlying event)?
+  - Can the community provide an informal rating of MC event generators?  What would be the basis for such a rating?
+  -
 ====Monte Carlo event samples====
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 Activities will be grouped around several **Letters of Interest**.  The portal for submitting an LOI is [[https://snowmass21.org/loi|here]].
+===== Submitted LOI =====
+Letters of Intent submitted to Energy Frontier (as primary frontier) [[https://www.snowmass21.org/docs/files/?dir=summaries/EF| shown in this link]]. Here is the list of submitted LOIs that include EF as primary or secondary topic.
+ First index before "/"  corresponds to the primary frontier used for the submission.
+ {{url>https://www.snowmass21.org/docs/files/list.php?frontier=EF5  border 100%,1200px}}