sPHENIX is a new detector at RHIC.

[John Lajoie <lajoie AT iastate.edu>]

Hi Aaron,

On 10/23/2017 4:39 PM, Aaron Angerami wrote:

L94: As discussed in the jet TG meeting, the efficiency is a strong function of the minimum pT cut used to select jets; inefficiency arises because the low side of the response distribution causes jets to be measured below the nominal cutoff and the efficiency is the integral of the response distribution above this cut. I thought the conclusion of that discussion was that the apparent lack of an effect in Fig. 1.3 was because there was no minimum pT cut applied. If a cut is applied, it should be stated in the text. To demonstrate the fragmentation dependence, a plot of the JER vs leading z would be far more general and effective.

I think the discussion in the Jet ToG might not have been clear.  There is *no* minimum pT cut on the reconstructed jets that go into making the fragmentation ratio plots. The only cuts applied were that the truth jet had a p>50GeV/c and was within |eta|<0.6, and that the highest momentum jet in the event was found within dR<0.4 of the truth jet.  In that sense, the curves in Fig 1.3 are really an efficiency for finding a jet in the two configurations shown vs. the SS310 configuration.

Regards,
John

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John Lajoie

Professor of Physics

Iowa State University

 

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