brief tech summary

README.md

@@ -4,6 +4,7 @@
 ### Table of Contents
 1. [Organisation](#organisation)
 2. [Overview of goals and studies](#overview-of-goals-and-studies)
+3. [How to implement your FCC-hh study ](#how-to-implement-your-FCC-hh-study)
 
 -----
 
@@ -13,6 +14,8 @@
 
 E-group for the FCC-hh P&P studies: [email protected]
 
+To subscribe, go [here](https://e-groups.cern.ch/e-groups/EgroupsSearchForm.do).
+
 Monthly meetings are planned for Thursdays, 4PM, CERN time, starting from mid October.
 - [Indico category](https://indico.cern.ch/category/18814/)
 
@@ -36,7 +39,7 @@ O(monthly) meetings: Mondays, 3pm-5pm, CERN time. Usually the third Monday of ea
 - [indico category "Physics Performance"](https://indico.cern.ch/category/12894/).
 
 
-E-group used for announcements: **FCC-PED-FeasibilityStudy**. To subscribe, go [here](https://e-groups.cern.ch/e-groups/EgroupsSearchForm.do). -->
+E-group used for announcements: **FCC-PED-FeasibilityStudy**.  -->
 
 
 ---------
@@ -66,9 +69,12 @@ We have collected a list of ongoing studies as well as ideas of areas below, but
 
 ### How to implement your FCC-hh study 
 
-#### Technical workflow overview 
+#### Overview
 
-<img src="images/flowchart_fcc_hh_workflow.png" alt="Overview of technical workflow" usemap="#techworkflow">
+ <figure>
+  <img src="images/flowchart_fcc_hh_workflow.png" alt="Overview of technical workflow" usemap="#techworkflow">
+  <figcaption>Overview of the FCC-hh workflow. Click on the various steps for more information.</figcaption>
+</figure> 
 
 <map name="techworkflow">
     <area shape="rect" coords="6,37,279,90" alt="Event generation tutorial for FCC" href="https://hep-fcc.github.io/fcc-tutorials/main/fast-sim-and-analysis/FccFastSimGeneration.html" target="_blank">
@@ -80,11 +86,22 @@ We have collected a list of ongoing studies as well as ideas of areas below, but
     <area shape="rect" coords="640,195,776,220" alt="EDM4hep event data model" href="https://github.com/key4hep/EDM4hep" target="_blank"> 
     <area shape="rect" coords="365,182,607,237" alt="FCCAnalyses framework" href="https://github.com/HEP-FCC/FCCAnalyses" target="_blank"> 
     <area shape="rect" coords="294,197,357,220" alt="ROOT trees information" href="https://root.cern/manual/trees/" target="_blank"> 
-    <area shape="rect" coords="6,182,128,237" alt="CMS combine package documentation" href="https://cms-analysis.github.io/HiggsAnalysis-CombinedLimit/latest/" target="_blank"> 
+    <area shape="rect" coords="6,182,128,237" alt="CMS combine package documentation" href="https://cms-analysis.github.io/HiggsAnalysis-CombinedLimit/latest/" target="_blank">
+</map>
 
+The typical technical workflow of a FCC-hh study is illustrated above. We rely on the software tools provided by the [key4hep project](https://github.com/key4hep) - a common, turnkey software stack for future colliders. 
 
-</map>
+Commonly generators like [MadGraph](https://launchpad.net/mg5amcnlo) and [POWHEG](https://powhegbox.mib.infn.it/) are used for the generation of proton-proton collision events at energies ~ 100 TeV. **Info about the PDF sets**. Those events are then stored in the [LHE format](https://arxiv.org/abs/hep-ph/0609017). 
+
+Hadronization, particle decays and a fast detector simulation with `DELPHES` are then applied in one step, resulting in reconstructed events stored in the EDM4hep data model. The available `DELPHES` scenarios for FCC-hh and where to find them are described in more detail [below](#delphes-scenarios-for-FCC-hh-and-official-production-campaigns). 
+
+To process the `EDM4hep` events we use the common `FCCAnalyses` framework, providing multi-threaded vectorial analysis tools using `ROOT`'s [RDataframe class](https://root.cern/doc/master/classROOT_1_1RDataFrame.html). 
+
+The output of `FCCAnalyses` framework can either be another (flat) `ROOT` ntuple, or simple histograms, which can than be further used in the standard ways, e.g. with multi-variate analysis (MVA) libraries, and the final statistical interpretation with the `combine` statistics tool, from the `CMS` collaboration. 
+
+More information, as well as hands-on examples, for every one of these steps are given in the [Quick Start Example](#quick-start-example) section below. 
 
+### Delphes scenarios for FCC-hh and official production campaigns
 
 
 #### Quick start example