Higgs and Calotopoclusters

1
Higgs and Calotopoclusters

• 10k events of H(130GeV)?4l
• In the event where 2 staco muons and 1 medium
  electron are reconstructed (PTleptons gt 10 GeV)
  and isolation (etcone20/et) lt 0.2
• The efficiency in finding the unfound electrons
  is 1256/1218 96 .
• Pt gt 5GeV for the topoclusters.

2
Calotopoclusters matching a track in the Higgs
sample ( hlt 2.7).

• 10k events of H(130GeV)?4l
• In the event where 2 staco muons and 1 medium
  electron are reconstructed (PTleptons gt 10 GeV)
  and isolation (etcone20/et) lt 0.2
• Remove the calotopoclusters that matches the
  reconstructed medium electron within DR lt0.2
• Create a topocluster candidate container
• Find a topocluster that matches the unfound truth
  electron within DR lt0.2
• Clean the track container from the tracks that
  matches the reconstructed medium electron and the
  two reconstructed muons
• Take the topocluster candidates that matches a
  track candidate within DR lt 0.2
• Calotopoclusters and tracks should be gt 5 GeV

3
Higgs mass with 1medium electron,2muons and a
track that matches a truth unfound electron
4
Here is the Higgs mass with 1 medium electron and
2 muons calotopocluster that matches a track
With truth matching
If I require that topocluster matches a track e
811/1256 65
5
The Z and Z (with the truth match)
The missing electron seems to be most of the time
from a Z
6
The Higgs mass without Particle ID
No truth
If Mmm is within 10 GeV from the MZ_PDG Then
The Z is from the two muons Otherwise The Z if
from the electron and the calotopocluster As a
cut on the plot above The on shell Z should be in
between 80 GeV and 100 Gev
7
Some ideas and .

• When requiring the track matching, the efficiency
  drops but this may help with the background in
  the central region where there is tracking.
• Probably if I try to learn how to do isolation on
  tracks it may help a little bit.
• Do you think I should pursue this idea and add
  the particle ID .
• I send an e-mail to M. Aharouche to check on the
  status of data with his frwd electrons as I will
  need also his help to learn how to do it. There
  is no documentation about it at all. Last time he
  told me that he is working on twiki page for
  that.
• The Zjets background does not exist in release
  13. (release 12 was the best in terms of data
  availability)