7/10/2004Erika Garutti1 The FLC Group (Future Linear Collider) oder ( Forschung an Lepton Collidern) Erika Garutti.

7/10/2004 Erika Garutti 1

The FLC Group(Future Linear Collider)

oder(Forschung an Lepton Collidern)

Erika Garutti

7/10/2004 Erika Garutti 2

• Hardware development/construction and test

of advanced high tech. detectors

• Software development of analysis programs

and detector simulations

• Analysis analysis of experimental data

What does a physicist do the whole day long?

7/10/2004 Erika Garutti 3

• Hardware development/construction and test

of advanced high tech. detectors

• Software development of analysis programs

and detector simulations

• Analysis analysis of experimental data

What does a physicist do the whole day long?

need to understand simulation and hardware

need to understand the physicsto address

need to understand the detectorto simulate

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Hardware activities @

Build a detector for experiments @ the ILC : the facility for the physics of the next 50 years

• max. Energy 500 – 800 GeV• superconductive cavities• High Luminosity • 33 km long

The ILC will be COLD!!!

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The TESLA detector

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Hardware activities @

New Physics implies:New requirementsNew technologyNew materials

• Tracking: Time Projection Chamber (TPC)

• Calorimetry: Hadronic Calorimeter (HCAL)

TPCTPC

ECALECALHCAHCALL

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Time Projection Chamber

Gas Electron Multiplier read out

- large volume: 3.5m diameter- simpler mechanics compared to wire chamber - distance between holes ~ resolution (100m)- easy 3D track reconstruction- low cost

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Time Projection Chamber

-built and tested @ DESY-Next steps: resolution and tracking studies in 5T magnetic field with e- beam

with laser system

TPC Lab. @ DESY

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Hadronic Calorimeter

First prototype already in operation @ DESY

- high granularity:small tile size

multiple layers

- high number of channels- need of small and cheap

photo-detectors for independent fiber read

out new technology development

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Technology to the limit

• 1 mm2 photo-detectors/1024 pixels

• Single photon signal • High granularity small

tiles• 800.000 channels read out

for TESLA

Pixels of the SiPM

SiPM

Silicon PhotoMultiplier (SiPM)MEPhI&PULSAR

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Software activities @

-Development of tracking software for TPC detector simulation

-Development of energy reconstruction software for HCAL

detector simulation

-MC simulation of ILC detector: geometry detectors property detector studies

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If there is a Higgs:

• the main production mechanisms are:

High energy WW fusion Low energy Higgs-strahlung

In the channel: ZH → ZWW → 4jets ℓ ν

Analysis @

Higgs physics at the ILC Understanding of mass generation Higgs couplings to bosons and fermions

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Analysis @

H

Z

e+

e-

Z *

Higgs main production mechanism at the ILC:Higgs-strahlung process

ZH X ZH qqbb ZH WW qq

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Analysis @

After the Higgs discovery (LHC?), the ILC will study:

Cross section Quantum numbers Couplings

CP

vio

lati

ng c

onri

b. to

SM

M=MZH+iMZAHWWbb BG: HZbb gHbb vs gHWW

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The Higgs potential

ee ZHH 6 jets

•Is the Higgs the Higgs?

•Check= M2H/2v2

•few tens of events

•reconstruct observable from 3 dijet masses

with LEP-like detector significance < 3

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WW/ZZ separation

Dilution factor vs cut:integrated luminosity equivalentNo Higgs scenario:

•WW scattering violates unitarity at ~1.2TeV, or new forces show up

•access EWSB mechanism from WW scattering•analyze eeWW and eeZZ channels•need to separate ZZ background•no kinematic fit possible due to the neutrinos We need a high resolution detector (a factor 2 better than LEP) OR we pay with luminosity (~40% more needed)

Ejet /

~(s/MW2)2

TESLA

LEP

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•Challenge: separate W and Z in their hadronic decay mode

•Dijet masses in WW, ZZ events (no kinematic fit possible):

40% more lumi is required for same resolution if =60%

Jet energy resolution

LEP-like detector LC design goal

%30%60

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Super Symmetry (SUSY)

• Fundamental symmetry between Fermions and Bosons

• Doubles the number of existing particles

• Symmetry breaking no super-symmetric particle observed by now

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Start from the past to understand the future

The OPAL experiment at LEP (CERN)Precision measurement of Z0 / WHiggs searchSUSY, search for new physics

Topics covered at FLC:- heavy Quarks: backward-forward asymmetry

b-fragmentation- Triple-gauge-boson coupling- Higgs search: double-charge Higgs bosons production - SUSY search: heavy stable charge particles- Technicolor search

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Start from the past to understand the future

The H1 experiment at DESYUnderstand QCD and the proton structure

Topics covered at FLC:- heavy Quarks production:

b-fragmentation

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: a large & international group

Group leader Prof. Dr. Rolf-Dieter Heuer (Uni HH) Dr. Ties Behnke (DESY)

8 wissenschaftliche Mitarbeiter (promoviert)1 Hochschulassistent: Klaus Desch1 DESY-Wissenschaftler: Felix Sefkow8 DESY-Fellows: Steve Aplin, Karsten Buesser, E.G., Markus Hamann, Thorsten Kuhl, Roman Poeschl, Alexei Raspereza, Peter Wienemann1 Gastwissenschaftler: Vasiliy Morgunov

10 DoktorandenPhilip Bechtle, Filip Franco-Sollova, Marius Groll, Andreas Imhof, Tatsiana Klimkovich, Thomas Krämer, Thorsten Lux, Niels Meyer, Jorgen Samson, Blanka Sobloher

4 Diplomanden Markus Ball, Matthias Enno Janssen, Hendrik Meyer, Oliver Wendt

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YOU @ ?!?!

To know more about what YOU could do @ FLC:

Contact: Klaus Desch, Ties Behnke, Rolf Heuer, Felix Sefkow Surf: www-flc.desy.deE-mail: in DESY-Telephone book

(www.desy.de)Pass by: Building 1d

There is a lot to be done for the physics of the future !!!