A case for learning the role of Si-PMs

to improve the working of HO

Monika Mittal(Panjab University,Chandigarh)

Supervisor :Prof Manjit KaurCo-Supervisor :Prof S.Dugad

OUTLINE

Completed my Pre-Ph.D theoretical course work.

Also learnt basic software needed for CMS analysis (CMSSW,

ROOT , Latex)

Event Generation – Pythia6 & Pythia8

Analysis – To reconstruct invariant mass under CMSSW framework

Test Beam Analysis(Data 2009)

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P P

Detector Simulation

Event ReconstructionsElectron, muons, gamma, jets, Missing energy

Physics Analysis, Plots, predictions

Papers, articles, talks ….

HEP Expt Event Generator

PYTHIA,HERWIG,ISAJET,SHERPA

Event Generator

Compare with Data

CMSSW/ATHENAGEANT4

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INTRODUCTION TO PYTHIA

• Pythia program - a standard tool for generation of high-energy collisions.

• Includes hard processes , models for intial- and final-state parton showers, multiple parton interactions, beam remnants, string fragmentation and particle decays.

• PYTHIA8 a complete rewrite in C++

• Started learning event generation with PYTHIA6 and then with PYTHIA8

• Also learning how to generate different processes (hard process , ISR etc...) for particle production

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Different processes in pythia8

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• Study out p-p interaction at the generation level as in actual CMS experiment, Using Pythia8GeneratorFilter

• Weak Single Boson production

• Allow Z boson to decay only through channels :

Z +

Z e+e

Generation of events using PYTHIA8

0Zff

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Invariant Mass Distribution

• sing CMSSW_4_1_5, writing analyzer to calculate invariant mass of Z boson from the produced –

• with Electron -positron pair and

• ISR &FSR On and Off

• with + pair and

• ISR & FSR On and Off

Initial state radiation(ISR) Final state radiation(FSR)8/6/2011 7

Invariant mass disribution plot for Z + & Z e+e

Z + Z e+e

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Invariant Mass Distribution

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Invariant Mass Distribution

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Test beam data analysis

Analyze the Test Beam Data for muon in HO (outerpart of hadron calorimeter)Towers for different values of eta and phi

The code which I use to anayze the test beam data for muon

Eta allowed value : 0.348 -0.870

i.e (tower index 5 -11 ring1 for HO)

Phi for one complete slice i.e 20 degree

With granuality 0.087*0.087 in eta-phi

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Muon Runno:106427, eta:7, phi:4

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Muon Runno:106425, eta:8, phi:4

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Muon Runno:106426, eta:9, phi:4

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Muon Runno:106437, eta:7, phi:2

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Muon Runno:106436, eta:8, phi:2

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Muon Runno:106434, eta:9, phi:2

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• Shall continue to work with CMSSW and TB2009 data (Pythia and Hit Level simulation completed)

• Participate in the service work /shifts

• Participate in CMS-Calorimeter Test Beams. Analysis of TB data will be part of my Ph.D. Thesis.

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Work to be done during July-December, 2011

• To participate in the Test Beam runs for HO (Si-PMs)during 15-30 July and October, 2011 along-with the team from FermiLab.Permission granted by Jim Freeman & Chris Tully (Coordinators)The work will be done under the supervision of Prof S.Dugadwho will be at CERN during July & August & Prof. Manjit Kaur

• Analyze the Test Beam 2011 and prepare results by December 2011.

• Shall learn to work with the required Software including GEANT4

• Since no other Test Beam runs are anticipated innear future, the CERN visit is requested to be approved.

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THANK YOU