starterkit-lessons
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Fix lesson for FilterInTrees
After the last modifications, the lesson (https://lhcb.github.io/starterkit-lessons/second-analysis-steps/filter-in-trees.html) doesn't make sense as we're not really selecting those events that are not compatible with a K*. In the end, it's all very confusing.
What I did was reuse the decay to build D*+ -> D0 (->K*(->K+pi-)pi0) pi+ reusing the K+ from the original decay, but this is not very interesting. We need to think of a better physics case.
Ideas?