1. Computing in ILC Contents: ILC Project Software for ILC
MC Production using GRID
Akiya Miyamoto
KEK
Co-Convener of ILD Software WG
Chair of ILC Software Common Task Group
14 March 2012
KEKCC-IN2P3 Workshop

2. International Linear Collider (ILC)
e+e- collider
Ecm: 0.2~0.5 TeV  1 TeV
∫Ldt > 500 fb-1 in 4 years
Polarization: e-: 80%, e+: 30%
Physics objectives
Sym. breaking + Mass generation
Beyond SM
ℒ 𝑤𝑜𝑟𝑙𝑑 = ℒ 𝑔𝑎𝑢𝑔𝑒 + ℒ ℎ𝑖𝑔𝑔𝑠 + ℒ 𝑦𝑢𝑘𝑎𝑤𝑎 + ℒ 𝑏𝑒𝑦𝑜𝑛𝑑𝑆𝑀
15 March Akiya Miyamoto
IN2P3 KEK Workshop

3. LHC implication LHC results so far No new particles yet. No CMSSM SUSY
Allowed mass range of Standard Model Higgs significantly reduced
K.Tokushuku
by the end of 2012, SM Higgs is discovered or SM is ruled out
15 March Akiya Miyamoto
IN2P3 KEK Workshop

4. Higgs and ILC Higgs sector is not well know in SM
Higgs is a key for mass generation in the gauge invariant theory.
Condense in vacuum
Variety of “Higgs” are predicted in models beyond SM.
The gate way for physics beyond SM.
A scenario for ILC
~250 GeV : e+e-  ZH
Spin, Mass, Couplings
~350 GeV : Top
~ 500 GeV
ttH
Higgs self-couplings
 ILC precession is crucial to establish Higgs mechanism
Coupling constant to Higgs
Higgs mass (GeV)
15 March Akiya Miyamoto
IN2P3 KEK Workshop

5. Time line of ILC project
ILCSC
ILD, SiD
ILC
Lab.
~200 Asian
~1000 Global
WWSOC/Regional OC ( bottom up org. )
2009
2010
2011
2012
2013
(Note: the plan after 2012 is under discussion )
15 March Akiya Miyamoto
IN2P3 KEK Workshop

6. Detail Baseline Design Report (DBD)
DBD guideline
define a feasible baseline design, incl. integration, push-pull
study benchmark processes with a realistic simulation and reconstruction
R&D on critical components
improved cost estimates
ILD
SiD
15 March Akiya Miyamoto
IN2P3 KEK Workshop

7. Challenge of ILC Detectors
Calorimeter:
Neutral particles
DE/E <½ of LEP
good
bad
W/Z separation W Z
Vertex Detector
b/c/t tagging
Rvtx<1/5 LHC
Improves
h(c-tag)
Tracker: Charged particles
Dpt/pt : 1/10 of LHC
Higgs
recoil to Z
15 March Akiya Miyamoto
IN2P3 KEK Workshop

8. Challenge of Software Challenge Key features
Enrich ILC physics case, taking progresses of HEP ( work with theorists )
Show the proposed detector can do physics and meet the ILC goal
Key features
Particle Flow :  Very good jet energy resolution by highly segmented calorimeter
Vertexing:  2nd/3rd vertex reconstrucion
Tracking:  excellent DP/P in ILC condition
ILD event
Calorimeter view
Vertex
Reconstruction
15 March Akiya Miyamoto
IN2P3 KEK Workshop

9. ILC DBD benchmark studies
DBD requirements defined by Research Director (PD) and ILC Detector AdvisoryGroup (IDAG) after ILD and SiD validation in 2009
4. Develop a realistic simulation model of the baseline design, including
the identified faults and limitations.
7. Simulate and analyze updated benchmark reactions with the realistic detector model. Include the impact of detector dead zones and updated background conditions.
8. Simulate and study some reactions at 1 TeV, including realistic higher-energy backgrounds, demonstrating the detector performance.
3 out of 9 items related to the software works
Benchmark processes
1 TeV:
𝑒 + 𝑒 − →𝜈 𝜈 ℎ for 𝐵𝑟s ℎ→ 𝜇 + 𝜇 − , 𝑏 𝑏 , 𝑐 𝑐 , 𝑔𝑔, 𝑊 𝑊 ∗ : t-channel
𝑒 + 𝑒 − →𝑊+W−for 𝜎 WW and beam pol. : Forward jets
𝑒 + 𝑒 − →𝑡 𝑡 ℎ for ytop : 8~10 jets
one of 500 GeV LOI channels
Others to enrich physics case
15 March Akiya Miyamoto
IN2P3 KEK Workshop

10. Software tools Generator : Simulation Reconstruction
Whizard 1.95 as the common generator
Physsim for tth, ttz, ttbb events: ( > 6 fermions )
stdhep as the common generator format
Simulation
Based on Geant4.9.5
Common physics_list, which will be defined by Calorimeter R&D group.
Mokka(ILD), SLIC(SID) : Simple geometry (LOI)  Complex geometry(DBD)
Reconstruction
PFA: PandoraPFA(LOI era)  PandoraPFANew(ILD, SiD). IowaPFA(SiD), Garlic(ILD)
FlavourID : LCFIVertexing(LOI era)  LCFIPlus(For multi-jet environment, Vertexing first, then jet clustering )
Tracking in LOI : org.lcsim(SiD), LEPTracking(ILD) ILD for DBD: Clupatra, KalTest, IMarlinTrack
15 March Akiya Miyamoto
IN2P3 KEK Workshop

11. Software core tool Common persistency with LCIO
Common to all LC community : Bases of collaboration between
SiD (Java based) and ILD (C++ based)
ILC and CLIC community
Example
PandoraPFA and LCFIPlus have been used by both ILD and SiD
Common DST format will be defined for DBD.
Data model (PFO, etc.) are provided by LCIO and common
Better consistency among variables
LCIO 1 (LOI)  LCIO 2 (DBD)
Improved based on LOI experiences. New feature includes
Simplified a use of LCIO with ROOT
Direct access to events
Improving the event data model
15 March Akiya Miyamoto
IN2P3 KEK Workshop

12. GRID ILC VO hosted by DESY LCG + OSG (FNAL)
ILC community (ILD+SiD) and CLIC community(ILC_CLIC, SiD_CLIC) share the same VO.
GRID Production tools
CLIC & SID: ILCDirac tools (CERN)
ILD : DESY(own tool), KEK(own tool), CERN(ILCDirac)
ILD MC production for LOI ( ) were made using GRID resources provided by DESY, CC-IN2P3 ( O(1k) cpus ) and KEK. We appreciate your support !
15 March Akiya Miyamoto
IN2P3 KEK Workshop

13. Resources for MC Production
Now: ILD and SiD are validating the software tools
MC Production for ILC DBD is about to start ( < 1 month ) CLIC extended benchmark studies (1.4 TeV ) is on going in parallel.
ILC DBD demands
~ 10M events x 10min/events / ~ 2000 nodes  ~ 1 month per detector per energy point.  2 detector concepts, a few options x several energy points, with additional requests for user specific analysis.
Allocate 5 month for production: April ~ August, 2012
The rest of 2012 is for analysis and writing document
We wish to use resources at IN2P3, KEK, DESY, CERN, FNAL, … We appreciate your support in coming months in advance.
15 March Akiya Miyamoto
IN2P3 KEK Workshop

14. Japan – Europe Bandwidth
During LOI era, bandwidth between KEK to DESY/CC-IN2P3 were not satisfactory.
20~60 sec over heads in each file transfer
100~300kb/sec per port
Problems had investigated in 2010 by experts in KEKCC and DESYCC
~ 3min to reach 1 Gbyte/sec transfer speed
KEK to DESY is ~3 faster
To cure,
multi-port, multi-jobs
Proper data size ( LOI dst files were small)
Hope to be OK in DBD prod we will find out soon or better tools
DESY  KEK
Took ~3min to reach
max. transfer speed
by Soh Suzuki
15 March Akiya Miyamoto
IN2P3 KEK Workshop

15. Summary
ILC is crucial to push forward our understanding of fundamental low of nature.
ILC community is now preparing Detector Baseline Document, which will be submitted to the ILC Technical Design Report by the end of 2012.
Benchmark studies based on a realistic simulation and reconstruction are indispensable part of the DBD studies.
MC productions for ILC DBD will start soon using ILCVO of LCG grid
Computing activities of ILC will continue beyond 2012.
15 March Akiya Miyamoto
IN2P3 KEK Workshop