Hi, Sasha
Thanks, the distributions are indeed very similar. Note that the ANL
server keeps HERWIG++ ttbar samples, while the Nebraska server keeps
MadGraph5+Pythia ttbar samples. But the fast simulation (Delphes3.06)
and pileup samples should be the same.
cheers, Sergei
Sergei Chekanov | WWW : www.hep.anl.gov/chakanau
=============== | Email: [log in to unmask]
HEP Division, ANL | Tel : +01-630-252 6541
9700 S.Cass,Argonne,IL 60439,USA | Fax : +01-630-252-5782
On 04/29/2013 05:26 PM, Alexandre Khanov wrote:
> Hi Meena,
>
> I produced the plots for those samples as well:
>
> anl samples: http://hep0.okstate.edu/khanov/snowmass/ttbar/
> unl samples: http://hep0.okstate.edu/khanov/snowmass/ttbar1/
>
> there are subtle differences (e.g. a slight shift in HT, including the
> no pileup samples), but the PU dependence is pretty much the same for
> both samples.
>
> -- Regards, Sasha
>
>
> On Mon, 29 Apr 2013, Meenakshi Narain wrote:
>
>> Hi Sasha,
>> Can you also look at some of the ttbar files at
>> http://red-gridftp11.unl.edu/Snowmass/Delphes-3.0.6.1/
>>
>> there are 13 and 33 TeV samples, with 0, 50 and 140 Pileup.
>> I believe in these samples, the pileup files are different from those
>> which
>> Sergei used. If would be a good to have feedback. For the 0 and 50 PU,
>> the
>> ttbar are about a few Million events. 140 PU the stats is much lower.
>>
>> in addition to ttbar there are also many other background samples.
>>
>> Regards,
>> Meenakshi
>>
>>
>>
>>
>>
>> On Apr 29, 2013, at 1:13 AM, Alexandre Khanov <[log in to unmask]>
>> wrote:
>>
>> Hi Sergei,
>>
>> thanks, it's working now. I looked at available ttbar samples
>> and made some plots:
>>
>> http://hep0.okstate.edu/khanov/snowmass/ttbar/
>>
>> Could you please take a look and see if they make sense to you?
>> I'm particularly concered about the MET and HT distributions.
>> MET (second column) changes a lot from 0 to 50 to 140 PU. HT
>> (third column) is almost the same for 0 and 50 PU but changes
>> dramatically from 50 to 140 PU. What particularly worries me is
>> that if I just calculate the sum of selected leptons and jets'
>> transverse momenta (columns 4,5) I don't see any big PU
>> dependence. Is it expected?
>>
>> -- Regards, Sasha
>>
>>
>> On Mon, 29 Apr 2013, Sergei Chekanov wrote:
>>
>>
>> Hi, Sasha
>>
>> Today I was copying new Delphes files, this could
>> case this glitch. It works now.
>>
>> Here are recent updates for:
>>
>>
>> https://atlaswww.hep.anl.gov/asc/wikidoc/doku.php?id=snowmass2013:montecarl
>>
>> o
>>
>> 1) Corrected truth particles for all top samples
>> (now we store all muons, electrons, taus, bosons and
>> exotic particles, i.e. Z')
>>
>> 2) New Pythia8 sample for Higgs+ttbar
>>
>> 3) Explained how to read Delphes output without
>> installing ROOT
>>
>> best, Sergei
>>
>> Sergei Chekanov | WWW :
>> www.hep.anl.gov/chakanau
>> =============== | Email:
>> [log in to unmask]
>> HEP Division, ANL | Tel :
>> +01-630-252 6541
>> 9700 S.Cass,Argonne,IL 60439,USA | Fax :
>> +01-630-252-5782
>>
>> On 04/28/2013 06:25 PM, Alexandre Khanov wrote:
>> Hi Sergei,
>> the samples were there this morning but
>> now I'm not able to access them:
>>
>> http://atlaswww1.hep.anl.gov/asc/snowmass2013/delphes36/ttbar/mu0/
>> Not Found
>> The requested URL
>> /asc/snowmass2013/delphes36/ttbar/mu0/
>> was not found
>> on this server.
>> Are you moving the samples around or
>> there is a problem with the server?
>> -- Regards, Sasha
>> Sergei Chekanov wrote:
>> Dear all,
>>
>> There are a few MC samples with ttbar
>> available for testing:
>> https://atlaswww.hep.anl.gov/asc/wikidoc/doku.php?id=snowmass2013:montecarl
>>
>> o#monte_carlo_samples_using_the_snowmass_detector
>>
>> (low pT ttbar, high pT ttbar and
>> Zprime(3TeV)->ttbar for mu=0,50,140).
>>
>> The samples were generated using the
>> Snowmass Combined LHC detector:
>> http://www.snowmass2013.org/tiki-index.php?page=Energy_Frontier_FastSimulat
>>
>>
>> ion#Fast_Simulation_and_Pileup_strategy_-_the_Snowmass_detector
>>
>> best, Sergei
>>
>>
>>
>>
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