Software tools for ILC Studies Akiya Miyamoto KEK CIAW07 November 5-7, IHEP, Beijing, China

Our software tools Event Reconstruction Digitizer Finder Fitter Detector Simulator QuickSim FullSim Event Generator Pythia CAIN StdHep Beamtest Analysis Physics Analysis Jet finder 6 November 20072CIAW07, Akiya Miyamoto

ROOT objects : Event Tree & Configuration Our software tools Beamtest Analysis Event Reconstruction Digitizer Finder Fitter Detector Simulator QuickSim FullSim Event Generator Pythia CAIN StdHep Physics Analysis Jet finder  Link to various tools at  GLD Software at  All packages are kept in the CVS. Accessible from 6 November 20073CIAW07, Akiya Miyamoto

DescriptionDetectorLanguageIO-FormatRegion SimdetFast Monte CarloTeslaTDRFortranStdhep/LCIOEU SGVFast Monte CarloflexibleC++None(LCIO)EU LelapsFast Monte CarloSiD, flexibleC++SIO, LCIOUS QuickSimFast Monte CarloGLDFortranROOTAsia Brahms-SimFull sim. - Geant3TeslaTDRC++ASCII, LCIOEU MokkaFull sim. – Geant4TeslaTDR, LDCC++LCIOEU SLICFull sim. – Geant4SiDC++LCIOUS ILC-ROOTFull sim. – Geant44thC++ROOTUS+EU JupiterFull sim. – Geant4GLDC++ROOT, LCIOAsia Brahms-RecoReconstruction frameworkTeslaTDRFortranLCIOEU Marlin Reconstruction Analysis framework Flexible,LDCC++LCIOEU Org-lcsimReconstruction packagesSiD(flexible)JavaLCIOUS SatellitesReconstruction packagesGLDC++ROOTAsia LCCDConditions data toolkitLDC, SiD,..C++MySQL, LCIOEU GEARGeometry DescriptionFlexibleC++XMLEU LCIOPersistency/Data modelAllC++,Java, Fortran -EU,US,A sia JAS3/WIREDAnalysis tool/Event displayLDC, SiD …Java XML,LCIO,stdhep, heprep, US, EU JSFAnalysis frameworkAllC++ROOT/LCIOAsia Software tools in the world 6 November 20074CIAW07, Akiya Miyamoto

Jupiter/Satellites for Full Simulation Studies JUPITER JLC Unified Particle Interaction and Tracking EmulatoR IO Input/Output module set URANUS LEDA Monte-Carlo Exact hits To Intermediate Simulated output Unified Reconstruction and ANalysis Utility Set Library Extension for Data Analysis METIS Satellites Geant4 based Simulator JSF/ROOT based Framework JSF: the analysis flow controller based on ROOT The release includes event generators, Quick Simulator, and simple event display MC truth generator Event Reconstruction Tools for simulation Tools For real data 6 November 20075CIAW07, Akiya Miyamoto

Jupiter feature - 1 Modular structure  easy installation of sub- detectors Currently using Geant4 8.2p01. Update to Gean4.9p01 soon. Geometry  Simple geometries are implemented ( enough for the detector optimization )  parameters ( size, material, etc ) can be modified by input ASCII file.  Parameters are saved as a ROOT object for use in Satellites later 6 November 20076CIAW07, Akiya Miyamoto

Jupiter feature - 2 Run mode: – A standalone Geant4 application – JSF application to output a ROOT file. Output:  Exact Hits of each detectors (Smearing in Satellites)  Pre- and Post- Hits at before/after Calorimeter  Used to record true track information which enter CAL/FCAL/BCAL.  Break points in tracking volume  Interface to LCIO format is prepared in the JSF framework Break point Post-hits Input:  StdHep file(ASCII), HepEvt, CAIN, or any generators implemented in JSF.  Binary StdHep file interface was implemented, but yet to be tested. 6 November 20077CIAW07, Akiya Miyamoto

GLD Geometry in Jupiter FCAL BCAL IT VTX CH2mask 1 module Include 10cm air gap as a readout space 6 November 20078CIAW07, Akiya Miyamoto

A Typical Event 6 November 20079CIAW07, Akiya Miyamoto

10 Satellites Analysis Jupiter result make smeared TPC hits from exact hit make TPC tracks make hybrid tracks (TPC+IT+VTX) make smeared/merged CAL hits from exact hit make Particle Flow Objects jet clustering Physics Study Cheated track finder Kalman fitter Cheated track finder Kalman fitter Cheated PFA or Realist PFA(GLD-PFA) Cheated PFA or Realist PFA(GLD-PFA) 1x1cm 2  5x1cm 2 cell Satellites is a collection of JSF modules for Jupiter data reconstruction 6 November 2007CIAW07, Akiya Miyamoto

Momentum Resolution Exact hit points created by single  events were fitted by Kalman fitter  (p t )/p t 2 (GeV -1 ) by A.Yamaguchi (Tsukuba) 6 November CIAW07, Akiya Miyamoto

Jet Measurements in ILC Det. Particle reconstruction Charged particles in tracking Detector Photons in the ECAL Neutral hadrons in the HCAL (and possibly ECAL) b/c ID: Vertex Detector  Large detector – spatially separate particles  High B-field – separate charged/neutrals  High granularity ECAL/HCAL – resolve particles For good jet erg resolution  Separate energy deposits from different particles 6 November CIAW07, Akiya Miyamoto

e+e+ e-e- Critical part to complete detector design  Large R & medium granularity vs. small R & fine granularity  Large R & medium B vs. small R & high B  Importance of HD Cal resolution vs. granularity  … Algorithm developed in GLD: Consists of several steps  Small-clustering  Gamma Finding  Cluster-track matching  Neutral hadron clustering Red : pion Yellow :gamma Blue : neutron GLD PFA 6 November CIAW07, Akiya Miyamoto

GLD PFA Performances Using 1x1cm 2 calorimeter cell size  E jet /E jet is uniform except very forward does not change significantly for ECAL cell size of 1x5cm 2 is worse for higher energy jets 6 November CIAW07, Akiya Miyamoto

LDC00 PandoraPFA A detailed and highly tuned algorithm – Topology based cluster merging – Identify photons, merged tracks, backscatters, MIP segments – Perform iterative re-clustering as needed, using track momentum    Won’t merge Won’t merge Could get merged 30 GeV 12 GeV 18 GeV 10 GeV Track 6 November CIAW07, Akiya Miyamoto

Detector Optimization Z  uds pair events are used for detector optimization PandoraPFA: B dep. for 100 GeV jets SiD like LDC like GLD like PandoraPFA: ECAL segmentation GLD PFA: Dep. on ECAL Rin Larger ECAL Rin performs better ( R is slightly more important than BR 2 rule) Further studies on physics channels are awaited. 6 November CIAW07, Akiya Miyamoto

Physics performance Studies of physics performances by full simulations have been started. Preliminary result by GLD-PFA, including ISR/BS, and b-tag. m H offset and wide  (m H ) are seen. Study is in progress to improve them. GLD Cheated PFA Analysis, ISR , undetected particles, and E double count are main contributor to  (m H ). After correct them, it is same as Z0 case 6 November CIAW07, Akiya Miyamoto

Physics Performance -2 6 November CIAW07, Akiya Miyamoto

Software for LOI/EDR era For LOI, Research Director/IDAG/WWSOC will define physics processes for detector benchmarks. A plan is under discussion. – Candidate processes: Reduced set of processes defined by the physics benchmark panel (hep-ex/ ) SM background processes would be considered StdHep files at SLAC would be used as standard generator inputs ILD: – GLD and LDC are going to work on common models. Jupiter+Satellites  Mokka+MarinReco LCIO format is accepted as a common IO format and a basis of joint studies. 6 November CIAW07, Akiya Miyamoto

T.Yoshioka, ALCPG07 21

22 T.Yoshioka, ALCPG07 For Z0 events, Satellites and GLD-PFA resolution is ~30%/√E For Higher energies ( 350 GeV), Jupiter-PandoraPFA performs better than GLD-PFA Need more studies to understand consistencies and differences.

GRID for ILD study GRID is a tool – to produce huge amount of data needed to optimize detector parameters for LOI/EDR – to share data samples across oceans ILC VO and CALICE VO hosted by DESY will be used for GRID based ILD studies. In Japan, KEK joined ILC and CALICE VO and is operating as a WLCG production site. Tohoku and Kobe are another GRID sites related to the ILC activities. GRID in KEK has been used to access files in DESY so far. Installation of JSF/Jupiter/Satellites in GRID are slowly in progress. 6 November CIAW07, Akiya Miyamoto

Summary Software tools based on ROOT and Geant4 have been developed and extensively used for GLD studies. For ILD studies in coming months, close collaboration with European tools are more important. LCIO and GRID are keys for activities in this direction. 6 November CIAW07, Akiya Miyamoto

Backup Slides

JSF 26 Framework: JSF = Root based application – All functions based on C++, compiled or through CINT – Provides common framework for event generations, detector simulations, analysis, and beam test data analysis – Unified framework for interactive and batch job: GUI, event display – Data are stored as root objects; root trees, ntuples, etc Release includes other tools QuickSim, Event generators, beamstrahlung spectrum generator, etc.

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Sample study by QuickSim Incl. beamstrahlung 350GeV, nominal  (Mh)~109MeV Incl. beamstrahlung 350GeV, high-lum  (Mh)~164MeV Incl. beamstrahlung 250GeV, nominal  (Mh)~27MeV  E/E(beam)~0.1% Differential Luminosity(500GeV) 28

GLD Configuration GLD Side view Moderate B Field : 3T R(ECAL) ~ 2.1m  ECAL: 33 layers of 3mm t W/2mm t Scint./1mm t Gap  HCAL: 46 layers of 20mm t Fe/5mm t Scint./1mm t Gap Photon sensor: MPPC ~O(10M) ch. Configuration of sensor is one of the R&D items 29

GLD Configuration - 2 TPC: R: 0.45  2.0m, ~200 radial sample Half Z: 2.3m MPGD readout:  r  <150  m SIT: Silicon Strip Barrel/Endcap VTX: Fine Pixel CCD: ~5x5mm 2 2 layers x 3 Super Layers 30