Future Prospects for Higgs Measurements at LHC Run 2+3

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Future Prospects
Prospects for
for Higgs
Higgs
Future
Measurements at
at LHC
LHC Run
Run 2+3
2+3
Measurements
HubertKroha
Kroha
Hubert
Max-Planck-Institutfűr
fűrPhysik,
Physik,Munich
Munich
Max-Planck-Institut
forthe
theATLAS
ATLAS&&CMS
CMScollaborations
collaborations
for
21/01/2014
H.Kroha, Aspen 2014
The LHC program
LHCrun
run22++33data
datataking
takingatat13-14
13-14TeV
TeVcms
cmsenergy
energyuntil
untilend
endofof2022
2022
LHC
LHC
Injectors
LHC schedule of 02/12/2013,
(F.Bordry to LHCC, 04/12/2013),
runs 2 and 3 approved
LHC
Injectors
Start of run 2
parameters defined:
13 TeV,   0.5 m
-1
3000fbfb
-1
3000
Run 1
7-8 TeV
26 fb-1
26 fb-1
21
21

LHC design
luminosity
Run 2
Run 3
13-14 TeV 
-1
100fbfb
-1
>>100
-1
300fbfb
-1
>>300
≈≈40
40

60
60

instantaneous
PhaseI I
luminosity
Phase
upgrade
upgrade
21/01/2014
Run 4
integrated
luminosity
Run 5
-1
300fbfb
-1 / year
~~300
/ year
≈≈140
140

PhaseIIII
Phase
upgrade
upgrade
H.Kroha, Aspen 2014
HL-LHC
HL-LHC
 = average
number of
pile-up
pp interactions
per BC.
 = inel L/nb fr
2
Higgs status
With26
26fbfb−1−1atat7-8
7-8TeV
TeV(run
(run1,1,2010-2012):
2010-2012):
With
2012/13:Discovery
Discoveryofofaascalar
scalar(~3)
(~3)Higgs
Higgsboson
bosoninindecays
decaysinto
intogaugeboson
gaugebosonpairs
pairs,
,ZZ,
ZZ,WW
WW
- -2012/13:
withmass
massofof125.6
125.6GeV
GeV(ATLAS-CONF-2013-014,
(ATLAS-CONF-2013-014,CMS-PAS-HIG-13-005).
CMS-PAS-HIG-13-005).
with
2013:Evidence
Evidencefor
fordecays
decaysinto
intofermions:
fermions:H
H
: :ATLAS
ATLAS4.1
4.1 (ATLAS-CONF-2013-108
(ATLAS-CONF-2013-108),),
- -2013:
M.VazquezAcosta,
Acosta,

CMS 3.4
3.4 (CMS-HIG-13-004,
(CMS-HIG-13-004,M.Vazquez

CMS

   
CERN-LHCseminar
seminar03/12/2013)
03/12/2013)
CERN-LHC
ATL-CONF-2013-108
 =  BR/ ( BR)SM
/ [%] (26 fb-1)
21/01/2014
CMS-HIG-13-005

WW
ZZ

bb
ATLAS
20
30
26
32
325
CMS
35
26
29
33
H.Kroha, Aspen 2014
54
ATL-CONF-2013-108
CMS-HIG-13-005, 002, 023,
arXiv 1312:5353, arXiv 1312:1129
3
Higgs physics with 300 fb−1 at 13-14 TeV
With>>10
10xxexisting
existingdata
dataset,
set,2.5
2.5xxinclusive
inclusiveHiggs
Higgsproduction
productioncross
crosssection:
section:
With
Precisemeasurements
measurementsofofHiggs
Higgsproduction
productionand
anddecay
decayrates,couplings
rates,couplingsand
andmass.
mass.
••Precise
Test
Testofofthe
theStandard
StandardModel
Modelininthe
theHiggs
Higgssector
sectorand
andprobe
probefor
fornew
newphysics
physics

(orderofoffew
fewpercent
percenteffects
effectson
onHiggs
Higgscouplings
couplingsininmost
mostmodels).
models).
(order
Searchfor
forrare/
rare/new/
new/invisible
invisibledecay
decaymodes.
modes.
••Search
Measurementsofoftensor
tensorstructure
structureofofHiggs
Higgscouplings
couplingsand
andpossible
possibleCP
CPviolating
violatingcontributions.
contributions.
••Measurements
Searchfor
foradditional
additionalHiggs
Higgsbosons
bosonsbeyond
beyondthe
theStandard
StandardModel.
Model.
••Search
MeasurementofofHiggs
Higgsself-coupling
self-couplingonly
onlyrealistic
realisticfor
forHL-LHC;
HL-LHC;not
notdiscussed
discussedhere.
here.
••Measurement
(VBF)production
productioncross
crosssections
sections
Theory:NNLO/NNLL
NNLO/NNLLQCD
QCD++NLO
NLOEWK
EWKcalculations
calculationsofofHiggs
HiggsggF
ggF(VBF)
Theory:
uncertainties.
with8%
8%(0.6%)
(0.6%)scale
scaleand
and7%
7%(1.7%)
(1.7%)PDF+
PDF+suncertainties.
with
s
Branchingratios
ratioswith
withtypically
typically3-5%
3-5%uncertainty.
uncertainty.
Branching
21/01/2014
H.Kroha, Aspen 2014
4
Projections for future LHC runs
Projectionsfor
forrun
run22++33together
togetherwith
withHL-LHC
HL-LHCprojections
projectionshave
havebeen
beenprepared
preparedfor
for
•• Projections
EuropeanStrategy
StrategyUpdate
Update2012,
2012,Snowmass
SnowmassSummer
SummerStudy
Study2013
2013and
andthe
the
 European
ECFAHL-LHC
HL-LHCworkshop
workshopOctober
October2013
2013(most
(mostrecent
recentupdate).
update).
 ECFA
Goaltotokeep
keepthe
thecurrent
currentperformance
performanceininrun
run22and
and33for
formaximum
maximumdouble
doublepile-up
pile-uplevel
level
•• Goal
with
withthe
theplanned
planneddetector
detectorand
andsoftware
softwareupgrades,
upgrades,

mainlyininpixel
pixeldetectors
detectorsand
andtrigger
triggersystem
system(run
(run22&&3).
3).
mainly
Encouragedby
bysuccessful
successfulmitigation
mitigationofofeffects
effectsofofearly
earlylarge
largepile-up
pile-upininrun
run1.1.
•• Encouraged
Fullsimulation
simulationofofsignal
signaland
andbackground
backgroundprocesses
processesfor
forrun
run22not
notyet
yetavailable.
available.
•• Full
ATLAS:
ATLAS:
Parametrisationofofthe
thedetector
detectorresponse
responsederived
derivedfrom
from 
  Parametrisation
 
 - -full
fullrun
run11detector
detectorsimulation
simulationwith
withpile-up
pile-upup
uptoto
==69
69and
and

fullPhase
PhaseI Idetector
detectorsimulation
simulationfor
for
up
uptoto80
80and
and14
14=TeV
=TeVcms
cmsenergy.
energy.

- -full
Alsosimulation
simulationofofPhase
PhaseIIIIdetector
detectoroptions
optionsfor
for
==80,
80,140,
140,200
200for
forHL-LHC.
HL-LHC.

- -Also
CMS:
CMS:
Rescalingofofrun
run11signal
signaland
andbackground
backgroundyields
yieldsfor
for14
14TeV
TeVcms
cmsenergy
energy
Rescaling
withthe
theassumption
assumptionthat
thatcurrent
currentdetector
detectorperformance
performancekept
keptafter
afterupgrades.
upgrades.
with
Complementedby
byparametrized
parametrizeddetector
detectorsimulation
simulation(e.g.
(e.g.for
for2HDM
2HDMstudies).
studies).
  Complemented
21/01/2014
H.Kroha, Aspen 2014

5
Higgs coupling measurements
Measurementofof (XXH)
(XXH)· ·BR(HYY)
BR(HYY)~~ΓΓXΓΓY/ /ΓΓH (in
(in“small
“smallwidth
widthapprox.”)
approx.”)
Measurement
X Y
H

withtotal
totalHiggs
Higgswidth
widthΓΓH==SMΓΓY (+
(+ΓΓBSM),),dominated
dominatedby
byΓΓb. .

with
H
SM Y
BSM
b
4.2MeV
MeVnot
notdirectly
directlymeasurable
measurableatatLHC,
LHC,but
butexpected
expectedlimits
limitsΓΓH<<920
920(200)
(200)MeV
MeVatat300
300fbfb-1-1(3000
(3000fbfb-1-1) )from
from
H,SM==4.2
ΓΓH,SM
H
(ATLAS-PHYS-PUB-2013-014).
massshift
shiftdue
duetotofinite
finitewidth
widtheffects
effectsininHH
signal
signaland
andbackground
backgroundinterference
interference (ATLAS-PHYS-PUB-2013-014).
mass
1)Signal
Signalstrengths
strengths==BR/
BR/(
(BR)
BR)SMdetermined
determineddirectly
directlyfor
foreach
eachproduction
production&&decay
decaychannel.
channel.
1)
SM
fromfitfittoto·BR
·BRmeas.
meas.test
testdeviations
deviationsfrom
fromSM.
SM.
2)Higgs
Higgscoupling
couplingscale
scalefactors
factorsY ==ggYY/g/gYY SM from
2)
Y
YY
YY SM
Universalcouplings
couplingsVand
and Ftotoweak
weakgauge
gaugebosons
bosons(V=
(V=W,Z)
W,Z)and
andfermions
fermions(F=
(F=b,b,t,t,))ininSM.
SM.
--Universal
V
F
2
exceptΓΓ and
andΓΓZwhich
whichdepend
dependon
onW
Wand
andfermion
fermionloops
loopsininSM,
SM,
- -ΓΓYY~~YY2 , , except

Z
 global
globalcoupling
couplingscale
scalefactor
factor H22==ΓΓH/ /ΓΓH, SM. .

H
H
H, SM

Contributionsfrom
fromnew
newphysics
physicsthrough
throughΓΓBSMand
andloop
loopprocesses.
processes.
- -Contributions
BSM
3)Coupling
Couplingscale
scalefactor
factorratios
ratios XY==X/ /Yindependent
independentofofassumptions
assumptionson
onHiggs
Higgstotal
totalwidth.
width.
3)
XY
X
Y
g
 , Z
,Z
21/01/2014
H.Kroha, Aspen 2014
6
Higgs signal strength
ATLAS: Syst.
Syst.errors
errorsas
asrun
run1,1,with
with(without)
(without)theory
theoryerrors
errors
ATLAS:
CMS:Scenario
Scenario1:1: all
allsystematic
systematicerrors
errorsas
asrun
run1.1.
CMS:
(Scenario2:2:exp.
exp.syst.
syst.errors
errors~~1/
1/L,L,theory
theoryerrors
errorsxx½).
½).
 (Scenario
CMS-13-002 , Snowmass
6 - 20%
(300 fb-1)
6 - 14%
(300 fb-1)
Not yet updated for much
improved MVA analysis
Very conservative
systematic errors
Not included in projections since new,
much improved analysis in progress
ECFA Workshop
ATL-PHYS-PUB-2013-014
/ [%] (300 fb -1)
21/01/2014

WW
ZZ

ATLAS
14 (9)
13 (8)
12 (6)
22 (16)
CMS
12 (6)
11 (6)
11 (7)
14 (8)
H.Kroha, Aspen 2014

Z
not incl.
39 (38)
147 (145)
14 (11)
42 (40)
bb
62
(62)
7
Higgs couplings
Combinedfits
fitsofofselected
selectedcoupling
couplingscale
scalefactors
factorsYassuming
assumingthe
theStandard
StandardModel.
Model.
Combined
Y
Largestfitfitversion:
version:
Largest
/ [%] (300 fb-1)
ATLAS
CMS

WW
ZZ
gg

bb
tt

Z
13 (8)
8 (7)
8 (7)
11 (9)
18 (13)
b = 
22 (20)
23 (21)
79 (78)
7 (5)
6 (4)
6 (4)
8 (6)
13 (10)
15 (14)
23 (23)
41 (41)
8
(6)
Rare decay modes
4 - 15%
(300 fb-1)
CMS-13-002, Snowmass
Otherbenchmark
benchmarktests:
tests:
Other
1)Universal
Universalcouplings
couplingstotofermions
fermions(F)
(F)and
and
1)
weakvector
vectorbosons
bosons(V)
(V)as
asininthe
theStandard
StandardModel
Model
weak
2)Overall
Overallcoupling
couplingscale
scalefactor
factorH
2)
H
(sensitive
to
new
physics).

(sensitive to new physics).
3)Branching
Branchingfraction
fractionBR
BRinvtotoinvisible,
invisible,undetected
undetected
3)
inv
finalstates(sensitive
states(sensitivetotonew
newphysics).
physics).
final
/ [%]
(300 fb-1)
ATLAS
H
V
3.2 (2.5)
3.3 (2.7)
CMS
21/01/2014
H.Kroha, Aspen 2014
6
(3)
F
BRinv limit
[%]
8.6 (7.1)
9
(7)
< 28 (<25)
< 28 (<17)
8
Higgs coupling ratios
CMS-13-002, Snowmass
4 - 18%
(300 fb-1)
4 - 14%
(300 fb-1)
ATLAS-PHYS-PUB-2013-014, ECFA WS
Genericcombined
combinedfitfitofofcoupling
couplingscale
scalefactor
factorratios
ratiosXY==X/ /Yw/o
w/oassumptions
assumptionson
ontotal
totalwidth:
width:
Generic
XY
X
Y
/  [%] (300 fb-1) g·Z/H
W/Z
/ Z
g/Z
/Z
b/Z
t/g
/Z
Z/Z
ATLAS
6
(3)
5 (4)
11 (5)
12 (11)
13 (11)
b = 
18 (17)
22 (20)
78 (78)
CMS
6
(4)
7 (4)
8 (5)
9 (6)
9 (6)
11 (8)
14 (13)
23 (22)
42 (40)
21/01/2014
H.Kroha, Aspen 2014
9
Higgs couplings summary
CMS, Europ. Strategy
Testofofuniversal
universalcouplings
couplingstoto
Test
fermions(F)
(F)vs.
vs.weak
weakvector
vectorbosons
bosons(V)
(V)
fermions
3 - 6% (V)
7 - 9% (F)
Red: 1 errors
300 fb-1
300
Blue: 2 errors
Full lines:
with current theory errors
Dashed lines: without theory errors
fb-1
2.7 - 3.3% (V)
7.1 - 8.6% (F)
3000
fb-1
ATLAS
ECFA WS
1.7 - 2.6% (V)
3.2 - 4.1% (F)
About5%
5%(10%)
(10%)precision
precisionininHiggs
Higgscouplings
couplingstotovector
vectorbosons
bosons(fermions)
(fermions)reachable
reachablewith
withrun
run2&3.
2&3.
••About
BSMeffects
effectson
onHiggs
Higgscouplings
couplingsexpected
expectedwell
wellbelow
below10%
10%level.
level.
••BSM
Improvementswith
with3000
3000fbfb-1-1by
by~20-30%
~20-30% for
forvector
vectorbosons
bosons(depending
(dependingon
onreduction
reductionofoftheory
theory
••Improvements
uncertainties)and
andby
by~~50%
50% for
forfermions.
fermions.
uncertainties)
Sensitivitytotorare
raredecay
decaymodes
modestoto
(second
(secondfermion
fermiongeneration!)
generation!)and
andZZonly
onlyatatHL-LHC.
HL-LHC.
Sensitivity
21/01/2014
H.Kroha, Aspen 2014
10
Invisible Higgs decays: Higgs as portal to Dark Matter
Comparable95%
95%CL
CLlimits
limits(ATLAS)
(ATLAS)
Comparable
oninvisible
invisiblebranching
branchingratio
ratioBR
BRinvfor
for300
300fbfb-1-1
on
inv
1)indirectly
indirectlyfrom
fromHiggs
Higgscoupling
couplingfit:
fit: <<28%
28% (25%)
(25%)
1)
miss:
2)and
andfrom
fromdirect
directsearch
searchfor
forZH
ZH
(ee
(ee)
)++EETmiss
2)
:
T
32% (23%)
(23%)
<<32%
Improvementby
byfactor
factorofof22for
for3000
3000fbfb-1-1. .
Improvement
Interpretationininterms
termsofofdark
darkmatter
matterparticles
particles
Interpretation
couplingmainly
mainlytotoHiggs
Higgs(“Higgs-portal”
(“Higgs-portal”models):
models):
coupling
expecteddirect
directupper
upperlimits
limitsDM-nucleon
DM-nucleoncross
crosssection
section
expected
dependingon
onWIMP
WIMPspin:
spin:
depending
Direct search (90% CL)
Sensitivitytotolow
lowWIMP
WIMPmass
massrange
range<<mmH/2,
/2,
Sensitivity
H
exceedingsensitivity
sensitivityofofgeneric
genericastrophysical
astrophysical
exceeding
DarkMatter
Mattersearches.
searches.
Dark
Comparablesensitivity
sensitivityofofdirect
directand
andindirect
indirect
Comparable
searches.
searches.
Scalar
Majorana
Vector
ATLAS-PHYS-PUB-2013-014/15/16, ECFA WS
mH /2
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H.Kroha, Aspen 2014
11
Sensitivity to new physics from Higgs couplings
ATLAS-PHYS-PUB-2013-015, ECFA Workshop
1)Extra
ExtraHiggs
Higgselectroweak
electroweaksinglet
singletHHmixing
mixingwith
with126
126GeV
GeVHiggs
Higgshhwith
withthe
thesame
samecouplings.
couplings.
1)
Effectson
onHiggs
Higgscouplings
couplingscan
canbe
berather
ratherlarge
largeofoforder
order6%.
6%.
Effects
onHiggs
Higgswidth
widthscale
scalefactors
factorsindependent
independentofofmmH, ,BR
BRH,new. .
Sensitivityvia
viaconstraint
constraint h22++H22==11on
Sensitivity
H
h
H
H,new
Fromcoupling
couplingfitfitofofh: : H <<0.35
0.35(0.31)
(0.31) (95
(95%
%CL)
CL)for
for300
300fbfb-1-1 ((<<0.31
0.31(0.25)
(0.25)for
for3000
3000fbfb-1-1)). .
From
h
H
2)“Two
“TwoHiggs
HiggsDoublet
DoubletModels”
Models”2HDM
2HDM (more
(moregeneral
generalthan
thanMSSM
MSSMHiggs
Higgssector),
sector),
2)
modifythe
thecouplings
couplingsofofthe
thelight
lightneutral
neutralscalar
scalarHiggs
Higgshhtotoweak
weakvector
vectorbosons
bosonsand
andfermions
fermions
modify
andthe
themixing
mixingangle
angleofofthe
thetwo
twoneutral
neutralscalars
scalarshhand
andHH
dependingon
ontan
tan==vv2/ /vv1and
depending
2
1
(uptoto6%
6%effects
effectson
onb):):
(up
b
Couplings
doublet 1 to
  doublet 2 to
C
 W/Z 
fermions
C
up
fermions
down fermions
includes MSSM
to quarks as I
to leptons as II
(lepton specific)
to quarks as II
to leptons as I
(“flipped”)
Indirect limits on BSM Higgs bosons in 2HDMs
Excluded 3000 fb-1
SM decoupling
limit
(h as in SM)
Type I
Type II
Excluded 300 fb-1
Type III
Type IV
Indirect limits from couplings independent of mA
21/01/2014
H.Kroha, Aspen 2014
ATLAS-PHYS-PUB-2013-015, ECFA WS
13
Direct search for BSM Higgs bosons in 2HDMs
Cleandecay
decaychannels
channelswith
withfull
fullmass
massreconstruction
reconstruction
Clean
(ATLAS&&CMS
CMSfor
forHL-LHC,
HL-LHC,ATLAS
ATLASalso
alsofor
forrun
run2&3)
2&3): :
(ATLAS
1) Heavy
Heavyneutral
neutralHiggs
Higgsdecays
decaysH/A
H/A
,
,
1)
3000 fb-1
300 fb-1
5discovery
discoverypotential
potentialininMSSM
MSSMframework
framework: :
5
2) Heavy
HeavyCP
CPeven
evenHiggs
Higgsdecays
decaysHH
ZZ
ZZ
4l,
4l,
2)
expected95%
95%CL
CLupper
upperlimits
limitson
on·BR,
·BR, 

expected
projectionofofcurrent
currentresults:
results:
projection
ATLAS-PHYS-PUB-2013-016, ECFA WS
300 fb-1
·BR in SM
3000 fb-1
~2.5 x improvement
21/01/2014
H.Kroha, Aspen 2014
14
Direct search for BSM Higgs bosons in 2HDMs
3) CP
CPodd
oddHiggs
Higgsdecays
decays AA
ZZhh with
with ZZ
ll,ll, hh
bb
bb
3)
Expected upper limit on · BR:
300 fb-1
3000 fb-1
~3x improvement
for ·BR(AZh) = 100 fb
ATLAS-PHYS-PUB-2013-016, ECFA Workshop
CMS PAS FTR-13-024, ECFA WS
21/01/2014
H.Kroha, Aspen 2014
15
Direct search for BSM Higgs bosons in 2HDMs
 5
5discovery
discoveryregions
regionsfor
forAA
ZZhhfor
formmAdepending
dependingon
oncos(
cos(--)
)for
fortan
tan==3:3:

A
3000 fb-1
3000 fb-1
3000 fb-1
300 fb-1
3000 fb-1
300 fb-1
Type I
300 fb-1
300 fb-1
Type II
Hatched: theoretically forbidden due to vacuum stability and unitarity
21/01/2014
H.Kroha, Aspen 2014
16
Higgs coupling tensor structure
Generalmixing
mixingof
ofCP
CPstates
statesof
ofaaspin-0
spin-0Higgs
Higgsboson
bosondecaying
decayinginto
intoZZ
ZZ(V=Z)
(V=Z)
General
effectivefield
fieldtheory:
theory:
inineffective
CP even Higgs
SM tree process
anomalous CP even Higgs contributions
loop induced:
small, neglected
-2
SM rad. corr. O(10 ), BSM?
CP odd Higgs
contribution:
BSM
orgg4(CP
(CPviolating)
violating)to
toSM
SMgg1=1
=1tree
treelevel
levelterm.
term.
Testfor
foradmixtures
admixtureswith
withcouplings
couplingsgg2or
Test
2
4
1
ATLAS:
ATLAS:
8Dfitfitto
todistributions
distributionsof
ofkinematic
kinematicvariables
variables
8D
(m4l,m
,mZZ1,2,,1,2, ,,
,1,,))generated
generateddepending
dependingon
ongg2and
andgg4
(m
4l
1,2
1
2
4
1,2
Freeparameters:
parameters:
Free
Realand
andimaginary
imaginarypart
partof
ofcouplings
couplingsgg2and
andgg4rel.
rel.totogg1. .
Real
2
4
1
Alternatively:fitfitof
ofcollection
collectionof
of
Alternatively:
matrixelement
elementratios
ratiosfor
forSM
SMand
andalternative
alternativehypotheses.
hypotheses.
matrix
CMS: Matrix
Matrixelement
elementlikelihood
likelihoodapproach
approachas
asfor
forrun
run1.
1.
CMS:
21/01/2014
H.Kroha, Aspen 2014
17
Higgs to ZZ tensor structure and CP mixing
ATLAS-PHYS-PUB-2013-013, ECFA Workshop
fb-1
fb-1
Factor 2-3 improvement with HL-LHC
21/01/2014
H.Kroha, Aspen 2014
Expected 95% CL regions
18
Higgs to ZZ tensor structure and CP mixing
Alternativedescription
descriptionininterms
termsofofcross
crosssection
sectionfractions
fractionsfgfg2,4=|g
=|g2,4|2|22,4/(
/(1++|g|g2,4|2|22,4))
Alternative
2,4
2,4
1
2,4
2,4
2,4
=
arg
(g
/g
):
and
relative
phases

2,4/g11
):
and relative phases gg2,4
2,4 = arg (g2,4
g4
CMS
phase
dependent
3000 fb-1
300 fb-1
phase
averaged
ATLAS-PHYS-PUB-2013-013,
ECFA Workshop
Sensitivity for 10-20% CP violating
admixture with run 2&3.
Factor 2-3 improvement with HL-LHC.
95%CL
CLlimit
limitfgfg4<<0.51
0.51
95%
4
fromCMS
CMSrun
run11data.
data.
from
21/01/2014
CMS-13-002, Snowmass
95%CL
CLupper
upperlimits
limits
95%
ATLAS8D
8Dfitfit
ATLAS
ATLAS
CMS
H.Kroha, Aspen 2014
0.13
0.13
0.04
fg4 =
ATLASME
MEfitfit
ATLAS
0.15 0.43
0.037 0.20
0.13
0.04
19
Conclusions
Oneofofthe
themain
maingoals
goalsofofLHC
LHCrun
run22&&33(14
(14TeV,
TeV,300
300fbfb-1-1):):
•• One
Precisemeasurement
measurementofofHiggs
Higgsproperties,
properties,ininparticular:
particular:
Precise
Higgscouplings
couplingstotogauge
gaugebosons
bosonsatat5%,
5%,totofermions
fermions(b,
(b,))atat10%
10%level.
level.
- -Higgs
Sensitivityfor
forCP-odd
CP-oddadmixtures
admixturestotoscalar
scalarHiggs
Higgsatat10-20%
10-20%level.
level.
- -Sensitivity
Similarconclusions
conclusionsfrom
fromATLAS
ATLASand
andCMS
CMSprojections
projectionstaking
takinginto
intoaccount
accountininspite
spiteofof
•• Similar
differencesininthe
theassumptions.
assumptions.
differences
Similarsensitivity
sensitivityofofdirect
directsearches
searchesandindirectly
andindirectly
•• Similar
fromHiggs
Higgscoupling
couplingmeasurements
measurementstoto
from
extensionsofofthe
theHiggs
Higgssector
sector
 - - extensions


DarkMatter
Mattercoupling
couplingtotoHiggs.
Higgs.
- - Dark
Typicallyfactor
factorofof2-3
2-3improvement
improvementwith
with3000
3000fbfb-1-1atatHL-LHC.
HL-LHC. 

•• Typically
Improvementofoftheory
theoryprecision
precisionneeded,
needed,too.
too.
Improvement
Sensitivitytotorare
rareHiggs
Higgsdecay
decaymodes
modes(including
(includingcoupling
couplingtotosecond
secondfermion
fermiongeneration,
generation,
•• Sensitivity
H)and
andHiggs
Higgsself-coupling
self-couplingonly
onlyatatHL-LHC.
HL-LHC.
H)
21/01/2014
H.Kroha, Aspen 2014
20
Backup
21/01/2014
H.Kroha, Aspen 2014
21
Detector upgrades performance for runs 2 & 3
Detectorupgrades
upgradesfor
forhigh-luminosity,
high-luminosity,high
highpile-up
pile-upconditions
conditionsininrun
run22&&33mainly
mainlyinin
Detector
pixeldetectors
detectorsand
andtrigger.
trigger.
pixel
Mainimprovements
improvementsininmissing
missingenergy
energyresolution,
resolution,bbtagging
taggingperformance
performanceand
andtrigger
triggerefficiency
efficiency
Main
ATLAS b-tagging
performance dep. on
pile-up level <> and
silicon tracker upgrades
ATLAS ETmiss distribution
for <> = 60 in run 3
ATLAS-PHYS-PUB-2013-009,
ECFA WS
ATLAS-PHYS-PUB-2013-007,
arXiv 1307:7292, Snowmass
Improvement of the CMS trigger efficiency
for Higgs channels due to upgrades in run 2
at L = 2.2 ·1034 cm -2 s-1
CMS-13-002, Snowmass
21/01/2014
H.Kroha, Aspen 2014
22
Backup: Higgs status
21/01/2014
H.Kroha, Aspen 2014
23
Backup: Higgs status
Typicalmagnitudes
magnitudesof
ofBSM
BSMHiggs
Higgscoupling
couplingmodifications
modifications
Typical
21/01/2014
H.Kroha, Aspen 2014
24
Higgs width
SMwidth
widthofof4.2
4.2MeV
MeVfor
formmH==126
126GeV
GeVnot
notmeasurable
measurableatatLHC.
LHC.
SM
H
Finitewidth
widtheffects:
effects: apparent
apparentHiggs
Higgsmass
massshift
shiftdue
duetoto
Finite
interferencebetween
betweenHH
signal
signaland
andcontinuum
continuumdiphoton
diphotonproduction
productionbackground
background
interference
(L.J.Dixon
Dixonand
andY.Li,
Y.Li,arXiv:1305:3854,
arXiv:1305:3854,Sep.
Sep.2013,
2013,S.P.
S.P.Martin,
Martin,arXiv:1303:3342,
arXiv:1303:3342,March
March2013).
2013).
(L.J.
CMSlimit
limitfrom
fromrun1
run1data:
data: ΓΓH << 6.9
6.9GeV
GeV (95%
(95%CL).
CL).
CMS
H
ATLASexpected
expectedlimits
limitsfor
for300
300fbfb-1-1(3000
(3000fbfb-1-1):): ΓΓH<< 920
920MeV
MeV(200
(200MeV)
MeV) (95%
(95%CL).
CL).
ATLAS
H
ATLAS-PHYS-PUB-2013-014, ECFA Workshop
Mass shift upper limit (ΓH)
Mass shift (ΓH)
Expected SM mass shift = -54.4 MeV
21/01/2014
H.Kroha, Aspen 2014
25
Higgs Portal to Dark Matter
ATLAS-PHYS-PUB-2013-014
ATLAS-PHYS-PUB-2013-015
Direct limits: 90% CL
Indirect limits: 95% CL
Scalar
Majorana
Vector
Sensitivitytotolow
lowWIMP
WIMPmass
massrange
range<<mmH/2,
/2,
Sensitivity
H
exceedingsensitivity
sensitivityofofgeneric
genericastrophysical
astrophysicalDM
DMsearches.
searches.
exceeding
SensitivityofofHiggs
Higgscoupling
couplingmeasurements
measurementscomparable
comparabletotothe
theone
oneofof
Sensitivity
directsearches
searchesfor
forinvisible
invisibleHiggs
Higgsdecays
decaysatatLHC.
LHC.
direct
21/01/2014
H.Kroha, Aspen 2014
26
Backup: Higgs Portal Models for DM
ATLAS-PHYS-PUB-2013-014, ECFA Workshop
21/01/2014
H.Kroha, Aspen 2014
27
Direct search for BSM Higgs bosons in 2HDMs
 95%
95%CL
CLAA
ZZhhexclusion
exclusionregions
regionsinintan
tandepending
dependingon
oncos(
cos(--)
)for
formmA==400
400GeV:
GeV:

A
Excluded
3000 fb-1
Excluded
3000 fb-1
Excluded
300 fb-1
Excluded 300 fb-1
Type I
Type II
Hatched: theoretically forbidden due to vacuum stability and unitarity
21/01/2014
H.Kroha, Aspen 2014
28
Search for BSM Higgs bosons in 2HDMs
Directvs.
vs.mmA–independent
–independentindirect
indirectlimits
limits
Direct
A
onAA
ZZh:
h: complementary
complementaryinformation
information
on
CMS PAS FTR-13-024, ECFA WS, 3000 fb-1
Allowed by
indirect search
Type II
Excluded by
direct search
Type I
21/01/2014
Type II
H.Kroha, Aspen 2014
29
Direct Search for BSM Higgs bosons in 2HDMs
CMS PAS FTR-13-024, ECFA WS
Type I
21/01/2014
Type II
H.Kroha, Aspen 2014
30
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