Opened 5 years ago
Last modified 5 years ago
#1372 new Bug
Problem with N-subjettiness values
| Reported by: | andrea.diluca | Owned by: | |
|---|---|---|---|
| Priority: | major | Milestone: | |
| Component: | Delphes code | Version: | Delphes 3 |
| Keywords: | Cc: |
Description
I'm running ./DeplphesPythia8 with the attached card and .cmd file. I'm interested on the N-subjettiness variables. From the definitions (arXiv:1011.2268), I would expect the values of these variables to be lower than 1. But I obtain values up to 250. Do you know the values that Delphes returns are normalized as in the definition?
Thank you.
Attachments (2)
Change History (4)
by , 5 years ago
| Attachment: | card_ATLAS_subjet.tcl added |
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comment:1 by , 5 years ago
According to Eq.2.2 in https://arxiv.org/pdf/1011.2268.pdf it seems you can normalize easily the tau_i by the pT(jet)*(jet parameter R) to get the normalized definition. This said one is usually interested in ratios of tau_i/tau_j where the normalisation does not matter.
comment:2 by , 5 years ago
Thank you for your kind and fast answer. Reading some commented code, in which it is furnished the N-subjettiness definition reference, I supposed the output variables to be already normalized.
Thank you again.
card