Transcript Large/Huge Detector Concept

Benchmark for
detector performance
11. Nov. 2004
@Concept meeting in
7th ACFA LCWS in Taipei
Y. Sugimoto
KEK
Two aspects of “Benchmark”

Physics benchmark
Detector
Performances
Physics
Outputs

Necessary to
•Advertise ILC
•Show
necessity of det.
R&D
•Show
advantage over
other detector
models
Detector benchmark
Physics
Process
Necessary to
Detector
Performance
•Optimize
detector
parameters
Many detector performances can be
determined only when the physics process
is specified
Guideline of selection of
detector benchmark process

Select minimum set of candidate physics processes without
duplication of final-state topology (event shape) for the detector
benchmark:




Topology means “two light quark jets”, “two tau jets with
missing E”, etc.
Select processes which give measure of detector
performance more directly and less analysis-dependently
Make a matrix “Detector performance”– “Physics process”
Study on the matrix elements relevant to each detector performance
Physics benchmark:
Important processes in ILC

Higgs Physics







e+e-  ZH
-H
nn
 ZHH
- HH
nn
 t-t H
SUSY





Standard Model






e+e-  t t
 ZZ
 WW
ff

e+e-  ~
e e~
~
m~
m
~t t~
~
 c1+ c1 c10 c20
 c10 c10 g
~t ~
t
Extra dimension



e+e-  GKK g (K.K. graviton)
 HH (graviton exchange)
 f f (graviton exchange)
Detector benchmark

Momentum resolution


e+e-  ZH, Z mm (Recoil mass resolution. May be
categorized in Physics benchmark.)
 MH=120 GeV, ECM=500 GeV
Jet energy resolution


e+e-  t t, qq, bb, cc (q: light quarks)
 ECM=50 – 500 GeV (several points)
 Basic data sample
e+e-  ZH, Z  j j, Hcc, bb
 MH=120 GeV, ECM=500 GeV
 Jet energy resolution for 4-jet events
Detector benchmark (2)

c- and b- tagging

e+e-  ZH, Znn, Hcc, bb (, t t)



MH=120GeV, ECM=500GeV
Tagging in 2-jet case
e+e-  ZH, Zj j, Hcc, bb (, t t)


MH=120GeV, ECM=500GeV
Tagging in 4-jet case
~
Detector benchmark (3)

t-tagging efficiency



e+e-  ZH, Z j j, Ht t, (cc, bb)
 MH=120GeV, ECM=500GeV
 Tagging in 4-jet case
~ tt
~ c0
e+e-  ~
t t,
 ECM=500GeV, Dm=10GeV
 Tagging of soft t
 2-g b.g. may be necessary
e+e-  t t (, qq, cc)
 ECM=500 GeV
 Tagging of hard t
Detector benchmark (3)

Target number of events



0.1M events/each process
Generated events should have a common output
format analyzable by different detector study
groups
If necessary, background events should also
be generated
Summary

Processes needed for detector benchmark



e+e-  ZH (MH=120GeV, ECM=500GeV)
e+e-  ~t t~ (ECM=500GeV, Dm=10GeV)
e+e-  t t, qq, cc, bb (ECM=50 – 500GeV)