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ρ is calculated using k_{t} R=0.4 jets reconstructed from locally calibrated (LCW) topoclusters within η<2. The density calculation is with respect to the Voronoi area of the jets as defined  
Changed:  
< <  in [[http://iopscience.iop.org/11266708/2008/04/005][JHEP 0804 (2008) 005]]. Topoclusters are an attempt to reconstruct threedimensional  
> >  in JHEP 0804 (2008) 005. Topoclusters are an attempt to reconstruct threedimensional  
energy deposits in the calorimeter and are built using a nearestneighbor algorithm that clusters calorimeter cells with energy significance (E_{cell}/σ) >4 for the seed, >2 for  
Line: 18 to 17  
using informaton derived from test beam and detailed GEANT4 simulatons (EM scale) and σ is the sum in quadrature of the electronic and expected pileup noise, as described in Sec. 10.5.2 of  
Changed:  
< <  [[http://iopscience.iop.org/17480221/3/08/S08003][JINST 3 (2008) S08003]]. Topoclusters can be further calibrated using local  
> >  JINST 3 (2008) S08003. Topoclusters can be further calibrated using local  
information (LCW) as described in  
Changed:  
< <  [[http://www.sciencedirect.com/science/article/pii/S0168900204012884][Nucl. Instrum. Meth. A 531 (2004) 481]]. The pileup noise used in  
> >  Nucl. Instrum. Meth. A 531 (2004) 481. The pileup noise used in  
topoclustering is chosen to match the pileup conditons. Pileup is simulated by overlaying GEANT4 simulated events from PYTHIA (v6.4) including nondiffractive and diffractive events. Truth jets are 
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Line: 226 to 226  
 
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< < 
 
> > 

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Changed:  
< <  
> >  Information Common To All Plots  
Changed:  
< < 
 
> >  ρ is calculated using k_{t} R=0.4 jets reconstructed from locally calibrated (LCW) topoclusters within η<2. The density calculation is with respect to the Voronoi area of the jets as defined in [[http://iopscience.iop.org/11266708/2008/04/005][JHEP 0804 (2008) 005]]. Topoclusters are an attempt to reconstruct threedimensional  
energy deposits in the calorimeter and are built using a nearestneighbor algorithm that clusters calorimeter cells with energy significance (E_{cell}/σ) >4 for the seed, >2 for neighbors, and >0 at the boundary. E_{cell} is calibrated using informaton derived from test beam and detailed GEANT4 simulatons (EM scale) and σ is the sum in quadrature of the electronic and  
Changed:  
< <  expected pileup noise, as described in Sec. 10.5.2 of JINST 3 (2008) S08003. Topoclusters can be further calibrated using local information (LCW) as described in Nucl. Instrum. Meth. A 531 (2004) 481. The pileup noise used in topoclustering is chosen to match the pileup conditons. Pileup is simulated by overlaying GEANT4 simulated events from PYTHIA (v6.4) including nondiffractive and diffractive events. Despite the optimization of the noise thresholds in each  
> >  expected pileup noise, as described in Sec. 10.5.2 of
[[http://iopscience.iop.org/17480221/3/08/S08003][JINST 3 (2008)
S08003]]. Topoclusters can be further calibrated using local
information (LCW) as described in
[[http://www.sciencedirect.com/science/article/pii/S0168900204012884][Nucl.
Instrum. Meth. A 531 (2004) 481]]. The pileup noise used in
topoclustering is chosen to match the pileup conditons. Pileup is
simulated by overlaying GEANT4 simulated events from PYTHIA (v6.4)
including nondiffractive and diffractive events. Truth jets are
built using stable particles from the hardscatter collision excluding
muons and neutrinos.
 
case, an increase in the RMS of the ρ distribution is observed with higher values of <μ>.  
Changed:  
< < 
 
> > 
 
 
Deleted:  
< <  ρ is calculated using k_{t} R=0.4 jets reconstructed from locally calibrated (LCW) topoclusters within η<2. The density calculation is with respect to the Voronoi area of the jets as defined in JHEP 0804 (2008) 005. Topoclusters are an attempt to reconstruct threedimensional energy deposits in the calorimeter and are built using a nearestneighbor algorithm that clusters calorimeter cells with energy significance (E_{cell}/σ) >4 for the seed, >2 for neighbors, and >0 at the boundary. E_{cell} is calibrated using informaton derived from test beam and detailed GEANT4 simulatons (EM scale) and σ is the sum in quadrature of the electronic and expected pileup noise, as described in Sec. 10.5.2 of JINST 3 (2008) S08003. Topoclusters can be further calibrated using local information (LCW) as described in Nucl. Instrum. Meth. A 531 (2004) 481. The pileup noise used in topoclustering is chosen to match the pileup conditons. Pileup is simulated by overlaying GEANT4 simulated events from PYTHIA (v6.4) including nondiffractive and diffractive events.  
For each choice of pileup noise (σ_{noise}^{pileup}), the dependence is approximately linear. The effect of increasing the pileup noise value is visible as a moderation of the effect of pileup on ρ. Optimization of σ_{noise}^{pileup} results in partial suppression of pileup activity in the calorimeter.  
Changed:  
< < 
 
> > 
 
Line: 61 to 55  
of the pileup contribution to the jet p_{T}. This contribution is calculated as the median eventbyevent p_{T} density (ρ) multiplied by the jet area (A).  
Deleted:  
< <  ρ is calculated using k_{t} R=0.4 jets reconstructed from locally calibrated (LCW) topoclusters within η<2. The density calculation is with respect to the Voronoi area of the jets as defined in JHEP 0804 (2008) 005. Topoclusters are an attempt to reconstruct threedimensional energy deposits in the calorimeter and are built using a nearestneighbor algorithm that clusters calorimeter cells with energy significance (E_{cell}/σ) >4 for the seed, >2 for neighbors, and >0 at the boundary. E_{cell} is calibrated using informaton derived from test beam and detailed GEANT4 simulatons (EM scale) and σ is the sum in quadrature of the electronic and expected pileup noise, as described in Sec. 10.5.2 of JINST 3 (2008) S08003. Topoclusters can be further calibrated using local information (LCW) as described in Nucl. Instrum. Meth. A 531 (2004) 481. The pileup noise used in topoclustering is chosen to match the pileup conditons. Pileup is simulated by overlaying GEANT4 simulated events from PYTHIA (v6.4) including nondiffractive and diffractive events.  
The residual dependence is largest in the forward region, as ρ is
calculated in the central region only. It is observed that the choice
of the pileup noise (σ_{noise}^{pileup}) has a
small effect on the residual pileup dependence.
 
Changed:  
< <  
> >  
[eps]  
Changed:  
< <  
> >  
[eps]
 
Added:  
> >  The mean p_{T} response of anti‐k_{t} R=0.4 jets as a
function of truth jet p_{T} for events with 80 interactions
per bunch crossing (solid lines, <μ>=80) and with no pileup (dotted
lines, <μ>=0). In <μ>=80 events, there is a significant
increase in the response due to the additional contribution of pileup
particles; this additional energy from pileup is not correlated with
the hard scatter jet p_{T}. Three different values of pileup
noise (σ_{noise}^{pileup}) are chosen for both
<μ>=80 and <μ>=0 events. Higher values of sigma reduce the
p_{T} response in both cases. In events with no pileup this
indicates that signal is being suppressed. In events with <μ>=80,
higher values of σ_{noise}^{pileup} partially
reduce the extra energy from pileup, but
σ_{noise}^{pileup} alone is not able to fully
restore the jet response to that of the jets with <μ>=0.
 
The RMS width of the p_{T} response distribution for reconstructed jets as a function of eta. Truth jets are built using stable particles from the hardscatter collision,  
Line: 98 to 115  
simulated data with pileup before (after) the application of the eventbyevent jet area pileup subtraction using the median p_{T} density.  
Changed:  
< <  ρ is calculated using k_{t} R=0.4 jets reconstructed from locally calibrated (LCW) topoclusters within η<2. The density calculation is with respect to the Voronoi area of the jets as defined in JHEP 0804 (2008) 005. Topoclusters are an attempt to reconstruct threedimensional energy deposits in the calorimeter and are built using a nearestneighbor algorithm that clusters calorimeter cells with energy significance (E_{cell}/σ) >4 for the seed, >2 for neighbors, and >0 at the boundary. E_{cell} is calibrated using informaton derived from test beam and detailed GEANT4 simulatons (EM scale) and σ is the sum in quadrature of the electronic and expected pileup noise, as described in Sec. 10.5.2 of JINST 3 (2008) S08003. Topoclusters can be further calibrated using local information (LCW) as described in Nucl. Instrum. Meth. A 531 (2004) 481. The pileup noise used in topoclustering is chosen to match the pileup conditons. Pileup is simulated by overlaying GEANT4 simulated events from PYTHIA (v6.4) including nondiffractive and diffractive events. The degrada+on in the width of the response distribution increases with  
> >  The degradation in the width of the response distribution increases with  
increased pileup activity, though in each case the pileup subtraction procedure is able to recover ~25% of the degradation in the central region of the calorimeter. The remaining degradation may be attributed  
Line: 122 to 123  
the choice of pileup noise has comparatively little effect on the RMS in
the absence of pileup.
 
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> >  
[eps]  
Changed:  
< <  
> >  
[eps]  
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> >  
[eps]  
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> >  
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Deleted:  
< <  
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> > 
 
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