Neutrino oscillations

References

• Tommy Ohlsson and Håkan Snellman, Neutrino Oscillations with Three Flavors in Matter of Varying Density Eur. Phys. J. C 20, 507 (2001)
• Olga Mena, Irina Mocioiu, and Soebur Razzaque, Oscillation effects on high-energy neutrino fluxes from astrophysical hidden sources Phys. Rev. D 75, 063003 (2007)

How to get the code

• The code has been uploaded to a GitHub repository

• You can browse the code (no need for an account, although if you want to contribute to the development of this code then you should get one)

• However you need to install Git if you want to fetch this code. I am not going to give you instructions about it. I believe there is sufficient documentation around.

• After installing Git, setup a working directory. Inside it, then execute:

cd workingdir
git clone https://github.com/andres0sorio/GRBsWork.git

• You will get the whole repository in its latest version.

• Note: at the Uniandes Hep Server ---this works:

cd workingdir
git clone git://github.com/andres0sorio/GRBsWork.git

Compilation

Requirements

• A ROOT version (any version above 5.34.00) compiled with the following interfaces
  • GSL needed by MathMore
  • XML libraries needed by Root XML parser

• Instructions on how to compile ROOT are here Install ROOT from source

• BOOST Libraries

Make

• Once you get code, cd into the src/ directory and do make

cd src/
make

• The tricky part is to get the requisites.

Make in CMSSW

• Only for CMS users: If you are using a system that is configured to run CMSSW, just try the following before make:

cd src/
source compileWcmssw.csh #or .sh if in BASH
make

• Then you will be ready to run.

Running

• After you have successfully compiled the code --no errors reported-- you can run the excecutables located under the subdirectory bin/. For our paper 01, we need to run the executable named paper01.exe. Options avaiable for this executable are explained if you ask for help:

cd bin/
./paper01.exe --help
Allowed options:
  --help                produce help message
  --model arg           model selection ( ModelA, ModelB, ModelC ) *
  --prob arg            selected probability ( Pee,Pem,Pet,Pmm,Ptt,... ) *
  --erange arg          energy range ( = emin,emax )
  --angles arg          use the following mixing angles ( = theta_1(12),theta_2(13),theta3(23) )
  --dmass2 arg          use the following delta masses square ( = dm2(Dm23sq),dM2(Dm21sq) )
  --modfile arg         use the specified model paramater file ( mymodelfile.xml )
  --steps arg           excecute steps ( 1,2,3,... )
  --earth arg           select earth model (EarthA, EarthB)

• --model and --prob options are obligatory. The rest are optional.

A bit of explanation

• This executable runs over the available star model profies. We got from Reference [Mena] three models available: "ModelA", "ModelB", "ModelC". Each one has different parameters. In this code, the parameters for each model are stored in the XML configuration file model_parameters.xml.

• The excutable DOES not produce plots. It produces a ROOT with ntuples that contains the data points for a model and probabilities. You need to run a script over those ntuples to make the plots. This script is provided.

• Plots are stored under the subdirectory results/.

• In summary to produce the results we got in our paper, we need:

An example

* Let's say we want to generate the probabilities vs energy plots for e-e e-mu and e-tau. You will need to do:

cd bin/
./paper01.exe --model ModelA --prob Pee,Pem,Pet

The range in energy is fixed to what is contain in the model_parameters.xml file. However, you can also give the energy range:

cd bin/
./paper01.exe --model ModelA --prob Pee,Pem,Pet --erange 1.0e11,1.0e12

• In any case, this produces the root file output.root. You can now run the script make_plots_paper01.C on this file. Start a ROOT session:

cd bin/
root -l
root [1] .L make_plots_paper01.C 
root [2] makePlots()

• You are done!

Documentation

Doxygen

It is pretty simple to generate documentation for this code using doxygen which can be installaed on your machine.

• A doxygen configuration file is available under the doc/ directory. Just do the following (assuming you got doxygen installed):

cd doc/
doxygen config

• This will generate documentation for all code in html format. Then to open it, go to your web browser and click on "Open File". Give the path to "doc/html/index.html" and the you are done.

• You will be able to explore the code in detail. Doxygen will show you for instance, the collaboration between classes as in this graph:

Data Flow

• Example: ROOT-tuple content of some data:
  

XML Configuration files

• matrix_config.xml (Based on Olga Mena's reference)

• Different mixing parameters setups also used by us:

• model_config.xml: XML model config file - (as in Olga Mena reference). Default values given in the XML file:

• Variations to these default parameters.
  • model_config_SetI.xml: model_config_SetI.xml
  • model_config_SetII.xml: model_config_SetII.xml