High energy heavy ion physics, or the perfect quark liquid
Volume 2
a.k.a. fffn9a85, fffn9a78, FIZ/2/094E
Basics
This course features work done individually by the students, measuring quantities from real life examples.
Background material for the course can be found in the following slides and notes:
- A set of slides about the flow analysis by Srikanta Tripathy: [pdf1], [pdf2]
- An old set of (Hungarian) slides: [pdf]
- Another old set of (partly Hungarian) slides: [pptx]
- An overview talk I gave recently on the phases of QCD: [pptx] [pdf]
- An overview talk I gave recently on hard probes: [pptx]
- A few slides on Bose-Einstein correlations: [pptx], [pdf]
- A recorded talk on Bose-Einstein correlations: [youtube]
- A textbook by László Csernai: [pdf]
- Measurement of the elliptic flow with the reaction plane method: [pdf]
- Measurement of the elliptic flow with the cumulants method: [pdf]
Prerequisites
In order to complete this course, you need to be familiar with c++ and ROOT. Below are some materials that may be helpful.
- A c++ tutorial: http://www.cplusplus.com/doc/tutorial/
- A short c++ course: https://www.phenix.bnl.gov/~purschke/CppCourse_BNL/
- ROOT webpage: https://root.cern.ch/
- ROOT guide: [html]
- A ROOT course: [pdf] (slides 29-61: C++ basics; slides 61-75: ROOT basics; slides 76-109: Histograms, functions, graphs;
- A few useful ROOT tutorials:
- Histograms: https://root.cern.ch/histogramming
- Histogram examples: https://root.cern.ch/doc/master/group__tutorial__hist.html
- Fitting examples: https://root.cern.ch/doc/master/group__tutorial__fit.html
- Trees: https://root.cern.ch/meet-ttree
- Minuit2: https://root.cern.ch/root/htmldoc/guides/minuit2/Minuit2.html
- Other HowTo pages: https://root.cern.ch/howtos
Working with data
- You will just have to download this data from the location provided at the beginning of the course
- Analyze
- Download analysis code [tgz]
- Read the README file there
- Put the data tree at the same location, or rewrite the analysis code to use the web-based file.
- Create the exe, exe/object, exe/object/dependencies directories
- Compile the code via make all, and run it as exe/analyzetree.exe <data.root> <output.root> <number of events to analyze>, with keeping the number of events to analyze low, i.e. 50000 or so (for experimenting)
- Plot the results via root.exe -b -q Plot_analyzetree.C\(\"<output.root>,<figures directory>\"\), substituting the output file produced in the previous step. You will also need a (preferably web based) directory for the plotted figures.
- Check if you can get back to zvertex, centrality and reaction plane distributions given at my BNL public web area
- You can access the particle properties through p.GetEntry(ientry), and then p.E[itrack] and similarly for others.
Máté Csanád
September 17, 2018