LHC FCC ee FCC hh HLLHC Plans Prospects for HL LHC Higgs Measurements Factors multiplying SM c ouplings Trilinear Higgs c oupling Projected e e Colliders Luminosity ID: 917108
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Slide1
Back to the
Future (?)
LEP
LHC
FCC-
ee
FCC-
hh
Slide2HL-LHC Plans
Slide3Prospects
for HL-LHC Higgs Measurements
Factors multiplying SM c
ouplings
Trilinear Higgs coupling
Slide4Projected
e
+
e- Colliders:
Luminosity vs Energy
t
Slide5ILC Measurements of H Couplings
Slide6The vision:
explore 10
TeV scale directly (100 TeV pp
) + indirectly (e+e-
)
Future Circular Colliders
Slide7FCC-
ee
Parameters & Run Plan
FCC-
ee
CDR
Slide8Possible
FCC-
ee Precision Measurements
Z peak
± 4
GeV
for α
EM
,
l
ine shape
WW
threshold
t
tbar
threshold
FCC-
ee
CDR
Slide9Precision Electroweak Measurements
with FCC-ee
Blondel
et al,
arXiv:
1809.01830
Slide10Precision Electroweak Measurements
Present and future EWPO errors
Comparison of future EWPO errors with TH estimates
Blondel
et al,
arXiv:
1809.01830
Slide11Numbers of Diagrams to be Calculated
Blondel
et al,
arXiv:
1809.01830
A lot of work
for theorists,
b
ut feasible!
Slide12Need to reduce theoretical uncertainties to match experimental errors
Needed for BSM interpretations
High precision at FCC-
ee
Big statistics at FCC-
hh
Accuracies of Future H Measurements
Slide13Sensitivity to HHH Coupling
Sensitivity through
radiative
corrections
Combining all
FCC-ee centre-of-mass energies: precision in
κλ of ±40% Improved to ±35% in combination with HL-
LHC
Further improved to
±25% when
c
Z
fixed
to
SM value
.
FCC-
ee
CDR
Slide14Sensitivity to
e+e-H Coupling
Sensitive to ~ 3 × SM
Slide15Parameters of
FCC-
hh
& HL/HE-LHC
Slide16At the LHC and beyond:
Higgs Cross Sections
Slide17Examples of Higgs Measurements
Slide18Prospects for HE-LHC Higgs Measurements
Higgs
trilinear
coupling:Combination with HL-LHC
Slide19FCC Constraints on
κV,F
Slide20SM Effective Field Theory: Tool to Search for BSM
D=6 operators in electroweak,
diboson data
D=
6 operators affecting Higgs observables
Slide21Global fit to dimension-6 operators using precision electroweak data, W
+W
- at LEP, Higgs and diboson data from LHC Runs 1 and 2Improvements in the constraints from Run 2
Constraints on BSM modelsSome contribute to operators at tree levelStops that contribute at loop level
Updated Global SMEFT
Fit
to
Higgs,
Diboson
and Electroweak Data
JE
, Murphy,
Sanz
&
You
, arXiv:
1803.03252
Slide22Run 2 Higgs
Measurements
used in
SMEFT Fit
CMS
ATLAS
Include allavailablekinematical information
+ W
+
W
-
m
easurement
a
t high
p
T
Probe 12 SMEFT directions
JE
,
Murphy,
Sanz
&
You
, arXiv:
1803.03252
Slide23Summary
20
13
Warsaw basis
JE
,
Murphy,
Sanz
&
You
, arXiv:
1803.03252
Slide24F
its to each operator individually
Extrapolating Global Fit to HL/HE-LHC
EMSY,
based on
arXiv:
1803.03252
Slide25F
its to all operators simultaneously
Extrapolating Global Fit to HL
/HE-LHC
EMSY,
based on
arXiv:
1803.03252
Slide26Generated by first-order electroweak phase transition
Observable if |Φ|6
/Λ2, Λ
small, also at HL-LHC
Reach of HL-LHC:
625 GeV
@ 3σ, 766 GeV 2σ
Reach of LISA:
580
GeV
Remark on Primordial Gravitational Waves
JE,
Lewicki
& No, arXiv:1809.08242
Slide27You must be joking!
We still believe in
supersymmetry
Slide28What lies beyond the Standard Model?
Supersymmetry
Stabilize electroweak vacuum
Successful
prediction for Higgs mass
Should be < 130
GeV
in simple models
Successful predictions for couplings
Should be within few % of SM values
Naturalness, GUTs, string,
…,
dark
matter
New motivations
From LHC Run 1
Slide29Inputs to Global Fits for New Physics
Flavour
observables:
Interpretation
requires lattice inputs
Electroweak
observables
LHC
observables
Dark Matter
Slide30Quo Vadis
gμ
- 2?
Strong discrepancy between BNL experiment and e+e-
data now ~ 3.7 σ
New experiment at FNAL (J-PARC)
New physics
a
t
TeV
scale?
SUSY?
Keshavarrzi
, Nomura &
Teubner
, arXiv:1802.02995
Slide31Craig@LHCP
Slide32Analysis of pMSSM11
Phenomenological MSSM with 11 parametersSample parameter space using
Multinest techniqueSampling with/without g-2Dedicated sampling of Dark Matter regionsSample 2 × 109
points
Bagnaschi
, Sakurai, JE et al
,
arXiv:1710.11091
Slide33Best-Fit
Sparticle
Spectrum
Phenomenological MSSM
Fit without g
μ
-2
Bagnaschi
, Sakurai, JE et al
,
arXiv:1710.11091
Accessible to LHC?
Slide34Best-Fit
Sparticle
Spectrum
Phenomenological MSSM
Fit with g
μ
-2
Accessible to LHC?
Bagnaschi
, Sakurai, JE et al
,
arXiv:1710.11091
Slide35Bagnaschi
, Sakurai, JE et al,
arXiv:1710.11091
Sparticle
Masses in the
pMSSM
68 & 95% CL ranges
Best-fit values
Accessible in pair production at
ILC500
,
ILC1000
,
CLIC
& production at
e+e
- colliders
Fit without g
μ
-2
Slide36Bagnaschi
, Sakurai, JE et al,
arXiv:1710.11091
Sparticle
Masses in the
pMSSM
68 & 95% CL ranges
Best-fit values
Accessible in pair production at
((ILC500))
,
(
ILC1000)
,
CLIC
& production at
e+e
- colliders
Fit with g
μ
-2
Slide37The Lighter Stop may be Light
χ2
likelihood functions for mstop, stop mixing
Mstop < 500
GeV allowed with Δχ2 ~ 2
pMSSM11
Bagnaschi
,
Bahl
, JE et al
,
arXiv:1810.10905
Slide38Squark-Gluino Plane
Discover 12
TeV
squark
,16 TeV
gluino @ 5σ
Slide39Bagnaschi
, Sakurai, JE et al
,
arXiv:1710.11091
No issue with
m
easured Higgs mass
Central values of decay
BRs similar to SM
Substantial deviations
possible
Fit without g
μ
-2
Fit with g
μ
-2
Higgs properties in
the
pMSSM
Slide40Simplified Dark Matter Models
Dark matter
χ + mediator particle of spin 0 or 1Assume
leptophobic gauge boson Y of some U(1)’ with vector and/or axial-vector couplingsModel parameters:
Coupling of mediator Y to dark matter: gDM
Coupling of Y to quarks (assumed universal): gSM
Mediator mass: mYDark matter particle mass: m
χ
Global analysis using
MasterCode
Bagnaschi
, …, JE et al
,
to appear
Slide41Dark Matter Simplified Models
Leptophobic
vector
m
ediator
Mediator masses between 100
GeV
and > 5
TeV
allowed
Bagnaschi
, …, JE et al
,
to appear
Coupling to SM particles
Coupling to
daark
matter
s
-channel annihilation
t-channel
Slide42Dark Matter Simplified Models
Leptophobic
axial-vector mediator
Mediator masses between 100
GeV
and > 5
TeV
allowed
Bagnaschi
, …, JE et al
,
to appear
Coupling to SM particles
Coupling to
daark
matter
s
-channel annihilation
t-channel
Slide43Dark Matter Simplified Model
Leptophobic
vector
m
ediator
Bagnaschi
, …, JE et al
,
to appear
Leptophobic
axial mediator
Spin-independent scattering
Spin-dependent scattering
Scattering could be close to experimental limits
Slide44«
Empty
» space
is unstable
Dark matter
Origin of matter
Hierarchy/naturalness
Masses of neutrinos
Inflation
Quantum
gravity
…
HL-LHC
is
on
its
way
ILC
might
be
next
CLIC’s
energy
advantageous
FCC
most
versatile
The
Standard Model