sPlot

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The sPlot or sWeights method allows disentangling the signal and background contributions in one variable $t$ by using a discriminant variable $m$ in which the probability density functions of signal and background are known.

Learn more

https://indico.cern.ch/event/940874/contributions/3953530/attachments/2127199/3581560/sweights_ms.pdf

http://arogozhnikov.github.io/2015/10/07/splot.html