Viewing a response to: @lemouth/particle-physics-utopian-io-objects-isolation-histogramming-and-a-first-task-request
Hi @lemouth, I have a few questions regarding the exercise: With regards to step 4 in the exercise, the paper states: > Events are rejected if the minimum opening angle between pTmiss and any of the four highest transverse momenta jets, ∆φ(pTmiss,pTjet), is less than 0.5. Are we to ignore this criteria since you wrote: > This is similar to anything we have done so far, as we only focus on transverse momentum and pseudorapidity constraints here. In table 3 of the photon identification paper, the criteria looks like: > 0.7 GeV + 0.005 pTgamma 1 GeV + 0.005 pTgamma Am I right to think that the pTgamma value is to be retrieved from: photon.momentum().Gamma() ? Do we need to care about the hadronic fraction*fh*? Thanks!
| author | irelandscape |
|---|---|
| permlink | re-lemouth-particle-physics-utopian-io-objects-isolation-histogramming-and-a-first-task-request-20180621t132802087z |
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Concerning the opening angle stuff, we will ignore it entirely, as the full selection strategy in fact. This requires a post on its own as special methods are in order to extract cutflows and things like that. For the moment, we solely focus on object definitions. > Am I right to think that the pTgamma value is to be retrieved from: photon.momentum().Gamma() ? This is just an abbrevation for the pt of the photon. The symbol of the photon is the Greek letter gamma. Therefore, one needs to use `myphoton->pt()` > Do we need to care about the hadronic fractionfh? No. We can't do that with our simulation setup (that approximates the real experimental apparatus).
| author | lemouth |
|---|---|
| permlink | re-irelandscape-re-lemouth-particle-physics-utopian-io-objects-isolation-histogramming-and-a-first-task-request-20180621t185446629z |
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Ok thanks for the clarification.
| author | irelandscape | ||||||
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You are welcome. By the way, have you noticed the tag requirements? :)
| author | lemouth |
|---|---|
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