SAB 14.5.2007Jorma Tuominiemi 1 HIP CMS PROGRAMME HIGHLIGHTS 2006- 2007 PLANS 2007- FUNDING

SAB 14.5.2007 Jorma Tuominiemi 1

HIP CMS PROGRAMME

HIGHLIGHTS 2006-2007

PLANS 2007-FUNDING


HIP CMS PROGRAMME

CMS PHYSICS ANALYSIS PROJECT Project Leader: V.Karimäki

CMS TRACKER PROJECT Project Leader: Eija Tuominen


1. PHYSICS ANALYSIS PROJECT

Physics simulation, study of the discovery potential of CMS, preparation for event reconstruction and physics analysis in CMS

CMS computing at HIP

CMS user support coordination

Software alignment of the CMS tracker

GEANT4 simulation tools


Project personnel

Veikko Karimäki, PhD Project Leader HelsinkiJorma Tuominiemi, Prof. Programme Director CERN/HkiRitva Kinnunen, PhD Senior Scientist HelsinkiKati Lassila-Perini, PhD Senior Scientist CERNSami Lehti, PhD Senior scientist HelsinkiTomas Lindén, PhD Senior scientist HelsinkiTapio Lampén, PhD PostDoc scientist HelsinkiAatos Heikkinen, MSc PhD Student HelsinkiJukka Nysten, MscEng Phd Student

CERNMikko Voutilainen, MScEng PhD student FermilabLauri Wendland, PhD Student HelsinkiPekka Kaitaniemi Student Helsinki


Physics Analysis, Status and Plans

1. Development and maintenance of tagging package withimpact parameter for CMSSW

2. Analysis of the H± -> , -> hadrons+ in fully hadronic channel from gg -> tbH± for 1 fb-1

- Trigger development and tests, in progress - Particle flow method for jet measurement, in

progress - Analysis of fake track measurement for

identification - Top reconstruction - Reconstruction of jet-MET transverse mass and

mH± measurement - Background measurement from data, exploiting W-

> events

R. Kinnunen, S. Lehti, L.Wendland


Physics Analysis, Status and Plans

.

3. Continuation of the H/A->-> 2 jets analysis for a PhD work (LW)

4. Development of a Neural Network Analysis tools for and b tagging

5. Joint project with HIP phenomenologists for Higgs boson searches in SUSY cascades with non-universal gaugino masses (almost finalized)

6. Participation to the Les Houches 2007 Workshop ”Physics at TeV Coolliders”


Trigger definition for the PTDR (ORCA) studies:Level-1: jet, ET > 93 GeV HLT: Missing ET > 67 GeV, primary vertex reconstruction with pixel lines, regional reconstruction in the full tracker around the Level-1 jet, pT > 25 GeV for the leading track, isolation in a cone around the leading track

CMSSW development: optimization of the L1 and HLT thresholds for heavy chargedHiggs bosons with H± -> , -> hadrons+

Development and tests of the Single Tau + MET trigger

tagging package with impact parameter

CMSSW vs ORCA testsfor 1-prong ’s:- agreement found for transverse impact parameter distributions (ipT)- uncertainty estimated more accurately in CMSSW

CMSSW

ORCA ORCA

CMSSW

Tracks from±n


Particle flow method for -jet measurementBackground suppression in the H± -> , -> hadrons+ channel is largely based on the helicity correlations in the H± -> versus W± -> decays. These correlations be exploited applying the cut pleading track/E jet > 0.8

Improvement of the pleading track/E jet resolution is expected from-jet reconstruction with Particle Flow methods

Principle of the method for 1-prong decays:- reconstruct ECAL clusters (from )- add to the momentum of the charged pion

A significant tail due to HCAL resolution was observed in the pleading track/E jet distribution with jet reconstruction in calorimeters

Benchmark result from the official CMS EFlow package for the energy resolution of single in the detector

Application of the package to gg -> tbH±, H± -> , -> hadrons+ in progress



Computing status

CMS Tier2 funding status

Cooperation with Finnish IT Centre for Science (CSC)

Hardware

Software and manpower

T.Lindén


Funding for LHC computing

The cost estimate for 2008 needs further iteration until it balances.

84%93%59%Ratio

0.95 MEUR0.86 MEUR1.35 MEURApplied

0.8 MEUR0.8 MEUR0.8 MEURGranted

201020092008

Good news: Ministry of education granted funds for HIP CMS Tier2 acquisition


Computing status

Acquisition of 2008-2010 hardware together with CSCMost centers have an annual acquisition process which gets price benefits,but can lead to heterogeneous computing resources. This needs to be agreed on with CSC weather to make one big acquisition or several smaller.

• Steering board for the Acquisition group to be nominated by 16th of May• HIP - CSC Contract to be written, CSC drafts• Technical acquisition specifications to be written by beginning of June 2006• New CSC machine room not ready by 1st of April 2008 - Exploring alternative temporary machine room solutions• Tough time schedule to have a production system by 1st of April, because of EU-acquisition regulations


Computing status

New manpower

• NDGF has one CMS middleware developer, Erik Edelmann

Hardware

• CSC loans to FTL, HIP and KL 128 AMD Opteron 2,2 GHz CPUs to be connected to ametisti, which will have 260 CPUs in total• Disk space is a limiting factor, HIP own purchase or purchasing at CSC


Computing status

Software• Building CMSSW works now on ametisti• dCache pool moved to NDGF production dCache server, needs some work• New PhEDEx installed, but needs testing• Squid server installation in progress on silo3• ProdAgent plugins for ARC middleware under development

Remaining issues• CSA07 contribution is vital• Manpower• Disk space in 2007• Implement CRAB/ASAP CMS plugins to ARC middleware• Balance aqcuisition between computing power and operations costs


User Support clients

User Support task definition

passive support: documentation

active support: solving problems

Our interests in support provided through EGEE

CMS User Support by HIP

Kati Lassila-Perini

CMS User Support Coordinator

Helsinki Institute of Physics


Typical CMS User Support client

A physicist doing analysis AND developing analysis software s/he wants to know the details of the software, such as

- where a track comes from- with which algorithm it was reconstructed- what is the efficiency of the algorithm

s/he does not want to know any computing details, such as

- where the data is stored- which procedures provide the access to the data

Two different approaches are needed for computing and software issues


User Support task definition Provide use support for analysis

Help desk, triaging of problems organize and provide documentation organize tutorials provide guidance to user for trouble shooting analysis jobs define what is needed for users to monitor and track jobs and

data in the system user accounts and VO management

Coordination based at CERN team at CERN involvement of SW developers involvement of physicists user support front-end at each T1/T2


Passive and active support

Passive support:documentation

- getting started- detailed software guide

monitoring and trouble shooting tools

making the existing documentation easily available Active support:

help desksavannah portal for user questione-mail contacthypernews forums

Aim at organizing good passive support to minimize the need for active support – always needed anyway for problem reporting


The CMSSW documentation consists of WorkBook: to get started and up to first analysis.

Reference Manual - technical documentation:- class lists

- brief description of content and purpose of each package

- data formats

- default configuration files and sequences.

CMS Offline Guide - the rest, i.e.:- description of algorithms and software architecture

- documentation which is too detailed for the WorkBook

- instructions for analysis and validation.

The CMSSW documentation


Track based tracker modules alignment

PhD thesis April 20, 2007 : Tapio Lampén: ”Detector Alignment Studies for the CMS Detector”

Many CMS groups active in the application of the H.I.P. algorithm:• CERN (F.Ronga et al., CMSSW)• Johns Hopkins (A.Gritsan, survey constraints)• Fermilab (J.Pivarski, muon chambers alignment)• INFN (R.Covarelli et al., TIB alignment at TIF, cosmics)• Vienna (C.Bloch, TOB alignment)• Karlsruhe (F-P.Schilling, alignment framework)Strong cooperation between different groups!

Other two algorithms used in CMS are ‘Millepede’ and Kalman Filter algorithm. The H.I.P. algorithm is computationally simple, and it has the most robust approach. It has been used in most of the alignment studies in CMS.

T.Lampén, V.Karimäki

SAB 14.5.2007 Jorma Tuominiemi 21CMS Pixel

Near future work

Studies of HIP algorithm (and comparisons with other algorithms) with

real data from Cosmic Rack setup (CERN and Helsinki C-Racks)

CMS Pixel

other real (cosmic) data?

Update of misalignment simulation of CMS (tools for standard misalignment scenarios)

benefit from the strong experience on SW development of the existing misalignment scenarios (T.Lampén)

CSA07 alignment exercise

Cosmic Rack

SiBT


Geant4 hadron showers

The problem: Hadronic showers simulated with standard Geant4 physics

lists are too short and narrow in comparison with test-beam data for LHCcalorimetry.

Solution: Significant amount of work has been done to understand andimprove the Geant4 simulation quality.A key observation was made: inclusion of intra-nuclear cascade models

of

Bertini-type (or Binary cascade) to Geant4 physics list will: Provide larger visible energy, the best resolution and the lowest

e/ratio Generate longer and wider hadronic showers

A.Heikkinen


High resolution Geant4 modeling for LHC

calorimetry

Double differential crosssectionfor neutrons producedin proton scattering off aluminum.Bertini models vs.experimental data.

(From A. Heikkinen with T. Koiet al., Validation of HadronicModels in Geant4, In proceedingsof Hadronic Shower SimulationWorkshop, September 6-8, FERMILAB.)


High resolution Geant4 modeling for LHC

calorimetry

J. Apostolakis et al.: Hadronic Shower Shape Studies in Geant4,CERN-LCGAPP-2007-02, March 22, 2007

summarizes these studies, and gives new recommendations for choosingoptimal physics models for LHC simulations: Suggested physics list is based on Geisha models (LHEP) Use combination of QGSP and Bertini cascade (QGSP BERT) if more precise physics is needed (e.g. for energy response and resolution)

Studies validating Geant4 physics still continue (in CMS and ATLAS, forexample) and significant improvements are expected in June 2007

releaseof Geant4 9.0.


Publications & Conferences

List of publications

Conferences

Documents

SAB 14.5.2007Jorma Tuominiemi 1 HIP CMS PROGRAMME HIGHLIGHTS 2006- 2007 PLANS 2007- FUNDING