L1 trigger studies for Diffractive Higgs: inelastic telescopes simulation

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L1 trigger studies for Diffractive Higgs
inelastic telescopes simulation
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Diffractive Higgs
Double Pomeron exchange

• Cross section O(fb)
• Lgt1032
• Final state 2 central jets 2 protons
  rapidity gaps
• In this study MH120 GeV/c2

jets
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CMS/TOTEM trigger strategies

• Diff. Higgs search feasible with joint CMS/TOTEM
• CMS 2 central jets trigger with ET 40 GeV
  threshold gives too high rate (very high QCD
  background) additional conditions needed.
• From TOTEM
• Conditions on RPs.
• Conditions on T1 and T2 as vetoes.
• RP conditions reduce QCD bkg of a factor 370 in
  the case of no-pileup (Llt1033). Much less (lt10)
  in case of pileup.

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T1 and T2 as veto
T1T2 tracker with almost 4 rapidity unit
coverage T1 and T2 can be used as a veto in
order to trigger rapidity gaps (assuming T1
and/or T2 can stand L1032). 100000 signal and
gt106 QCD events have been fully simulated.
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Simulation results
Factorization
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QCD jets
gt 106 QCD di-jets events divided by pT bin.
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Conclusions

• If T1 and/or T2 can be used at L1032 they can
  provide important trigger conditions.
• Veto conditions on the telescopes result in a
  very high signal acceptance (gt90) and QCD
  background rejection (some orders of magnitude).
• As expected, in presence of pileup events
  (Lgt41032), a steep fall of efficiency is
  observed, due to the very low probability of rap
  gap survival.
• The results have been published in the
  proceedings of the HERA/LHC workshop.
• If these results are going to be included in the
  LOI a short note (TOTEM-note?) is needed to be
  quoted in the LOI.

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RISERVA
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Mass in SD events
T2 triggered