Connor Graham's Analysis

This page summarises key points and events from my <nop>PhD analysis, if you make any changes to this topic (or sub-topics) please sign your name next to the edit. My thesis topic is an analysis of 2017 data from the NA62 experiment at CERN, to make a measurement of the branching fraction K⁺→π⁺νν to 10% Standard Model sensitivity.

Timeline

To view the dates of meetings, shifts, other events and presentations view the event timeline page.

Non-analysis work this week:

• Added subsections to this TWiki page by the use of links and wikiwords, so this one page doesn't get too long

Analysis

To view the past, current and future progression of the analysis work view the analysis timeline page.

Thesis document

I've collected all the relevant guideline documents and found a LATEX template for a generic "science and engineering" thesis. I've made a draft copy, added some basic information, style (both in the code and pdf) and some preliminary chapter titles. I'll mostly work on this in the background at this stage, such as a little while on shifts or during long periods of travel.

Some initial content has been added in bullet point and section title format, this will be expanded (when time allows) to some first draft paragraphs.

Instructions:

NA62 framework and user directory: (may expand this into a complete section with the instructions written out to be easier to read)

Instruction file in the shared directory under: /readme/analysisbuild.txt

I'm currently using "NA62AnalysisBuilder.py build -j16 --build-user-only --old-specialtrigger fullanalysis.conf" to build my config file

• --old-specialtrigger (explained above) is for backward compatibility with datasets that were filtered using an older revision
• --build-user-only speeds up the build if the framework is built and up-to-date (wouldn't advise this unless this analyser has been built at least once completely)
• -j16 uses more cores to run the build, also speeding it up

Instruction file in the shared directory under: /readme/NA62MC.txt

How to download and run the cvmfs version of the analysis framework to generate a reconstructed MC .root file.

Generating an analyser for a specific (or style of) root file

Instruction file in the shared directory under: /readme/MakeClass_instructions.txt

How to generate an analyser from a root file using the <nop>MakeClass() ROOT function, then subsequently run that function in the ROOT comand line.

Code

• Current version of my K_μ2 normalisation sample code on 16/11/17 (runs with data and r1720 of the Git framework): /codes/kmu2norm/KaonEventAnalysis.cc (.hh also in this directory, as required to build)
• Simple histogram plotter, last updated 16/11/17 (see code for instructions): /codes/simple_histo_plotter.C