simulations required for review peter jacobs lbnl
Download
Skip this Video
Download Presentation
Simulations Required for Review Peter Jacobs, LBNL

Loading in 2 Seconds...

play fullscreen
1 / 9

Simulations Required for Review Peter Jacobs, LBNL - PowerPoint PPT Presentation


  • 64 Views
  • Uploaded on

Simulations Required for Review Peter Jacobs, LBNL. Basis for EMCal physics case: Trigger: p 0 / g , e, jet Full jet reconstruction Gamma/pi0 discrimination Electron/hadron discrimination (neutron background) Need to assess impact of EMCal on key physics measurements

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about ' Simulations Required for Review Peter Jacobs, LBNL' - cameo


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
simulations required for review peter jacobs lbnl
Simulations Required for ReviewPeter Jacobs, LBNL
  • Basis for EMCal physics case:
    • Trigger: p0/g, e, jet
    • Full jet reconstruction
    • Gamma/pi0 discrimination
    • Electron/hadron discrimination
    • (neutron background)
  • Need to assess impact of EMCal on key physics measurements
    • not sufficient only to quote resolutions or background suppression factors
  • Need to assess impact of reduces acceptances (staging and “upgrade” scenarios)

An EMC for ALICE

trigger
Trigger
  • p0/g trigger: PHOS technology in hand
    • no simulations needed of hardware performance (?)
  • Jet trigger: see talks by pmj and Chris
    • imho understood sufficiently except for HLT rejection performance (use offline reco to study)
  • Electrons: new topic, needs targeted study
    • some back of envelope calculations would help and may be all that is possible in time remaining
    • compare to other ALICE lepton measurements
        •  new manpower needed!

An EMC for ALICE

g p 0
g/p0
  • See Marco’s talk
  • need to incorporate cross sections, g/p0 ratio
  • estimate fragmentation photon contributions

An EMC for ALICE

electron hadron discrimination
Electron/hadron discrimination
  • Role of EMCal in ALICE for electrons:
    • vs TRD?
    • in coincidence with TRD?
    • e-mu coincidence w/ muon arm?
  • No time before December to dig into this in detail
    • needs new effort

An EMC for ALICE

full jet reconstruction
Full jet reconstruction
  • IMHO this is the centerpiece of the physics case for the EMCAL
  • Thus far there are detailed studies of specific response but afaik only partial assessment of physics performance
    • Need to assess finite resolution in light of physical spectrum
    • Need to assess effects of jet quenching
    • Varying background: p+p, minbias Pb+Pb, central Pb+Pb
    • Need to compare leading hadrons vs charged jets vs full jets (w/ EMCal)

An EMC for ALICE

slide7

physical

spectrum

Ereco/Ethrown

d-fn input

Ethrown

Not the clearest way to plot it , need to redo and expand…

An EMC for ALICE

jet physics simulations
Jet physics simulations
  • TPC+EMCal response: use detailed geant w/ d-fn input parameterize
  • Throw physical distribution w/ parameterized response
  • Look at bias on parton energy distribution
    • Leading particle vs charged jets vs full jets
    • pp vs PbPbminbias vs PbPbcentral
    • quenching models

IMHO this issue is central to physics case: need to make signficant progress in next month

An EMC for ALICE

reduced acceptance
Reduced acceptance

p0 etc: rate scales linearly with acceptance

Finite size jet patch: slightly more complicated but still geometric

No advantage to detailed simulations:

Tom should define the scenarios, then redo the simple acceptance calculations:

Full acceptance

An EMC for ALICE

ad