Difference: LHCat2TeV (2 vs. 3)

Revision 32009-07-16 - AndrewHamilton

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META TOPICPARENT name="AndrewHamilton"

LHC at 2 TeV

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Compare to Previous Results

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We can make a direct (except p vs. pbar) comparison of LHC data to Tevatron data. This will give additional confidence in our results and detector understanding. More...
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We can make a direct (except p vs. pbar) comparison of LHC data to Tevatron data. This will give additional confidence in our results and detector understanding. More... How much lumi would we need to make reasonable comparisons to Tevatron results? (minbias, jets, anything else?)
 

Luminosity

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6 70 1100 20 120
2 20 320 6 35
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Moving from 2 TeV to 6 TeV, we gain a factor ~3 in the cross section for Z and W production. By running at 2 TeV we will have fewer of these golden calibration events. This is clearly a disadvantage if we collect 100pb-1, but with ~10pb-1 the advantage is not clear because we don't get much with ~10pb-1 at 6 TeV anyways. So, if the 2009 run will be ~10pb-1, there is not much gained in W and Z at 6 TeV.
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Moving from 2 TeV to 6 TeV, we gain a factor ~3 in the cross section for Z and W production. By running at 2 TeV we will have fewer of these golden calibration events. This is clearly a disadvantage if we collect 100pb-1, but with ~10pb-1 the advantage is not clear because we don't get much with ~10pb-1 at 6 TeV anyways. So, if the 2009 run will be ~10pb-1, there is not much gained in W and Z at 6 TeV. We need to think about whether the statistics gained in these channels will really make a difference when considering a 'short' run.

Focus our manpower

By removing the possibility to search for new physics, we will focus the entire collaboration on commissioning.

  -- AndrewHamilton - 14 Jul 2009
 
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