Hello
I need to create a chain (background) with several files, each one representing a different physics channel, with its own cross-section. I need to weight each channel with Luminosity, cross-section and the total number of generated events.
I found how to force TChain to plot the data with only one weight, but couldn’t find how to have diferent weights to each tree.
I tried to load the tree, assign a weight to it, then add it to the chain, but when making some histo, root simply exited, if I had issued a “.q” command.
I’m using ROOT 3.05/07 running on Linux RH 9.0
Thanks
Luiz Mundim