[Rivet] CMS_2011_S9120041, jet reconstruction

[Sercan Sen]

Hello Andy,

Now it looks consistent what is written in the paper.

However, I add Mohammed in cc who is the author of the routine. So, he can let us know if this is exactly the same with what was done in the experiment.

Cheers,
Sercan





On Dec 12, 2012, at 4:11 PM, Andy Buckley wrote:

Hi Sercan,

Thanks for that. I've applied what I hope is a reasonable correction here:

https://rivet.hepforge.org/trac/changeset?reponame=&new=4079%40branches%2F2012-06-aidarivet%2Fsrc%2FAnalyses%2FCMS_2011_S9120041.cc&old=3921%40branches%2F2012-06-aidarivet%2Fsrc%2FAnalyses%2FCMS_2011_S9120041.cc

Can you check that this does what it should? I checked that it compiles,
and FourMomentum::isZero() should be safe.

Cheers :)
Andy


On 12/12/12 15:53, Sercan Sen wrote:

Hello Andy,

Today in the meeting I forgot to mention you that we may a little bug
in CMS_2011_S9120041 Rivet routine (http://arxiv.org/pdf/1107.0330v1.pdf).

I think in this paper jets are reconstructed in |\eta| < 2 from the
charged final state in |\eta| < 2.5 .

page 3:
"Selected events are also required to contain a track-jet with pT > 1
GeV/c, reconstructed with pseudorapidity |η| < 2. Track-jets are defined
using the SISCone algorithm [22] as implemented in the FastJet
package.... Charged particles reconstructed in the tracker with pT > 0.5
GeV/c and |η| < 2.5 are used to define the track-jet; this η range is
wider than that used for the UE analysis (|η| < 2) in order to avoid a
kinematic bias."

However, in the Rivet routine all jets are reconstructed in |\eta| < 2.5
and there is no cut on the eta of the jets (or on the eta of the leading
jet).

Thanks,
Sercan

--
Sercan Sen http://cern.ch/ssen
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--
Dr Andy Buckley, SUPA Advanced Research Fellow
Particle Physics Expt Group, University of Edinburgh

The University of Edinburgh is a charitable body, registered in
Scotland, with registration number SC005336.


--
Sercan Sen http://cern.ch/ssen
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