LHC / ILC interplay 1

Strong Electroweak Symmetry Breaking

P.Krstonosic

Work done by : K. Mönig, W.Killian, P.Krstonosic, M. Beyer, E. Schmidt, H. Schröder

LHC / ILC interplay 2

Introduction Introduction

ee ee 4 5 6 7 10

WWWW WWWW + +

ZZWW + + + +

ZWZW ZWZW + + + +

ZZZZ ZZZZ + + + + +

• deff. remark

• All possible weak boson scattering processes and sensitivity to the quartic anomalous couplings

VVtrVVtrL 2

44

16

LHC / ILC interplay 3

ProcessesProcesses

Channel ee

qqqqWW eeee

qqqqZZ eeee

)(backgroundqqqq

qqqqeZWe

qqqqeeWWee

qqqqeeZZee

Xtt

qqqqWW

qqqqZZ

qqeWe

qqeeZee

qq

Channel ee

qqqqWW eeee

qqqqeZWe ee

qqqqeeWWee

qqqqeeZZee

qqeWe ee

qqeeZee

Xttee

• Polarization 80%L for e- , 40%R for e+ for the beams

new

• Initial state radiation taken into account • single weak boson production as background • e- e- option considered

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• dependence of the total cross section on anomalous couplings( only one varied at a time) , and sensitivity of variables used in the fit ( total mass , absolute production and decay angle )

Sensitive variables Sensitive variables

LHC / ILC interplay 5

• Matrix element calculation with

lkji

MClkji

lkji

MClkji

DATAlkji NNNL )log(

jiijiiji EDCBAR 221),(

Simulation & Fit Simulation & Fit

• Full 1ab-1 event sample generated with

WHIZARD

• Hadronization with PYTHIA followed by SIMDET fast simulation

O'mega used for calculating

event weights in the form :

where R is the ratio of the matrix element to the SM one • Sensitivity is evaluated with Binned Likelihood Fit

DATAN SM sample, RNN DATAMC • After separate analysis for signal processes double counted events were assigned to one sample according to mass distance from M(V)+M(V) mass (V=W or Z)

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ISRISR

• example of ISR influence on result

( 800GeV W+W- )

Fit for only signal process

( no background)

LHC / ILC interplay 7

1TeV e+e-1TeV e+e-

• two parameter contours

( full line 70%Cl, dotted line 90%Cl)

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1TeV e+e-1TeV e+e-

• Results from 1ab-1 sample

• 2D case ( ) 01076 • and a full 5D fit

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1TeV e+ e-1TeV e+ e-

2D 1σ Error

1.41 1.38

1.16 1.09

4

5

5D 1σ Error

-2.72 2.37

-2.46 2.35

-3.93 5.53

-3.22 3.31

-5.55 4.55

4

5

6

7

10

• result for a 1ab-1 sample from e+e- processes at 1TeV

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1TeV e-e- and combined 1TeV e-e- and combined

•in red 1ab-1 e+e- & 350fb-1 e- e-

•in blue 2ab-1 e+e-

LHC / ILC interplay 11

standard modelbackground

Triple weak boson production Triple weak boson production

LHC / ILC interplay 12

• momenta• 3 particles x 4 components 12• energy momentum conservation - 4 • on-shell condition - 3• axial invariance (-dependence) - 2

– e.g. eZ plane, ZW plane

• total 3• kinematical variables:

M(ww), M(wz),θ(Z)

• spins, 2 d.o.f

Three-body kinematicsThree-body kinematics

LHC / ILC interplay 13

5

4

preliminary

Confidence level contoursConfidence level contours

70%Cl 90%Cl

WWZ 80% e-right, 60% e+left ZZZ unpolarized

WWZ 80% e-right polarizationWWZ unpolarized

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LHC / ILC interplay 17

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LHC / ILC interplay 19

Current status

LHC ILC

Analysis Analysis

Result ResultCombine

assumptions

assumptions

Contour Number

Number Contour X

LHC / ILC interplay 20

ILC

Examples

• Limited use .. Just to make a nice plot ( increase authors citation index ) .. No use for another study

LC-PHSM-2001-038

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What we want

LHC ILC

Analysis Analysis

Result

assumptions

LHC / ILC interplay 22

SummarySummary

• Major step towards a full and consistent set of limits done

• Triple weak boson production still to come

• Interpretation of results in specific physic scenarios in plan

• waiting for results of LHC analysis