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drkovalskyi / Bmm5

BsToMuMu analysis code for CMS experiment at CERN
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Use acos for alphaXY #1

Closed drkovalskyi closed 4 years ago

drkovalskyi commented 4 years ago

Cosine of the point angle is very close to one for signal events and most of its discriminating power comes from very short variations in the angle, so it's better to use angle instead of its cosine as it's done for 3D alpha.

The change requires retraining of the MVA, which is time consuming.

drkovalskyi commented 4 years ago

Added extra variable called alphaXY