mt2 0.1.6

Stransverse mass computation as a numpy ufunc.

mt2

MT2, Asymmetric MT2, and the Stransverse Mass

This package may be used to evaluate MT2 in all its variants.

Specifically, it provides a numpy ufunc interface to the bisection algorithm and C++ implementation of http://arxiv.org/abs/1411.4312. The variable MT2 itself is described in http://arxiv.org/abs/hep-ph/9906349. Related information may be found in papers relating to MT2 linked from https://www.hep.phy.cam.ac.uk/~lester/mt2/index.html.

License

Please cite:

• http://arxiv.org/abs/hep-ph/9906349, if you use MT2 in an academic paper, and

• http://arxiv.org/abs/1411.4312 if you use this particular calculator.

Example Usage

Single calculation of MT2:

from mt2 import mt2

pxA =   410
pyA =    20
mVisA = 100
chiA =  100

pxB =  -210
pyB =  -300
mVisB = 150
chiB =  100

pxMiss = -200
pyMiss =  280

val = mt2(mVisA, pxA, pyA, mVisB, pxB, pyB, pxMiss, pyMiss, chiA, chiB)
print("Expected mT2 = 412.628.  Computed mT2 = ", val)

An example using broadcasting:

to appear soon ....

History

0.1.5 (2021-02-10)

• Migrate to preliminary v7 of C file

• Disable copyright message printing on run

• Move away from pybind11 in favour of raw numpy C API

0.1.4 (2021-02-09)

• Actually fix the build, maybe

0.1.3 (2021-02-09)

• Fix the build

0.1.2 (2021-02-09)

• Attempt C++ build

0.1.1 (2021-02-09)

• Trivial change to test updating package on PyPI.

0.1.0 (2021-02-09)

• First release on PyPI.