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susynt / SusyNtuple

UCI Taffard's group analysis ntuples
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Switching to new MT2 tool #82

Closed amete closed 9 years ago

amete commented 9 years ago

Hi @gerbaudo @dantrim @ataffard

I've just created a new brach from the master that incorporates the new MT2 tool. The source code is at [1]. I break down their code into source/header files, and integrated them in to SusyNtuple. In Run-I we used to assume that the visible particles are massless, so were the LSPs. The new tool give a handle to calculate MT2 w/ asymmetric LSP values, which I've integrated in, though by default we use 0 GeV. One thing that attracted my attention in the new code is that by default the visible masses are taken from the four-vectors directly. I modified their code a bit such that we can set this should we want to do 1-1 comparison. For the 2L analysis, or in general leptonic MT2 calculation, the difference is mostly academic. The end user don't have to change anything, all the changes happen under the SusyNtuple's hood. Please let me know what you guys think.

Best, Serhan

[1] https://svnweb.cern.ch/trac/atlasphys-susy/browser/Physics/SUSY/Tools/CalcGenericMT2/

gerbaudo commented 9 years ago

Thanks! for reference, can you add a comment (on github or in the code) where you modified their implementation? (so that we need what to change if we need to re-import the header).

The corresponding changes in susynt/susynt-read#4 and susynt/susynt-write#8 should also be tested, please.

amete commented 9 years ago

Thanks @gerbaudo, I've just added the relevant comments.