Alice has found that the Z->bb and H->bb decays basically look the same. This is expected!
The one difference is in the pT - so we will figure out how to make a plot of the pTs and compare them.
Two possibilities: increasing the number of events should help, but also check the range/units. We see that pythia uses GeV, so the range 0,200 should be okay.
The other thing that came up was the problem of decay chains - there are many Zs for example present in one event but they are all just copies of the original.
What Alice wants is to reproduce the "branching fraction/ratio" of Z->bb. So the denominator is all Zs, but to stop including Zs that are just radiating other Zs! To do this we can ask that the Z has not got a daughter that is also a Z
For Z->bb there is some weird asymmetry with the bs and bbars passing the filter, and this is not present for H->bb.
Alice increased the number of events considering the sqrt N uncertainties and they do seem to be equalising.
We are meeting on Monday at 4pm : Alice to make a one-page report outline for then
Alice has found that the Z->bb and H->bb decays basically look the same. This is expected!
The one difference is in the pT - so we will figure out how to make a plot of the pTs and compare them. Two possibilities: increasing the number of events should help, but also check the range/units. We see that pythia uses GeV, so the range 0,200 should be okay.
The other thing that came up was the problem of decay chains - there are many Zs for example present in one event but they are all just copies of the original. What Alice wants is to reproduce the "branching fraction/ratio" of Z->bb. So the denominator is all Zs, but to stop including Zs that are just radiating other Zs! To do this we can ask that the Z has not got a daughter that is also a Z
For Z->bb there is some weird asymmetry with the bs and bbars passing the filter, and this is not present for H->bb. Alice increased the number of events considering the sqrt N uncertainties and they do seem to be equalising.
We are meeting on Monday at 4pm : Alice to make a one-page report outline for then