Zhen hua Zhao ITPCAS Liu amp Zhao arXiv13127389 1 Contents Motivation The Model Phenomenological Consequence Summary 2 Higgs with 125 GeV mass 3 SM is completed and selfconsistent ID: 492481
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Slide1
A Realization of Effective SUSY
Zhen-hua ZhaoITP,CAS Liu & Zhao arXiv:1312.7389
1Slide2
Contents
MotivationThe ModelPhenomenological ConsequenceSummary2Slide3
Higgs with 125
GeV mass3
SM is completed and self-consistentSlide4
Gauge Hierarchy Problem
When extrapolated to higher scale Λ, Higgs mass suffers quadratic divergence problem
TeV
SUSY is good candidate for solving this problem
4Slide5
Search for SUSY
Nothing found5Slide6
Motivation
LHC constraints on SUSY particles 1st & 2nd generation squarks heavy as 10 TeVOriginal motivation for SUSY: Naturalness 3
rd
generation &
Higgsino
,
gaugino
light as 1
TeV
A model realizing this mass spectrum needed
6Slide7
Effective SUSY
For solving FCNC problem induced by soft terms“irrelevancy” hypothesis: 1st&2nd
generation
squarks
very heavy e.g. 10
TeV
“Naturalness” criterion:
3
rd
generation
squarks
should stay at 1
TeV
7
A. G. Cohen et al
hep
-ph/9607394Slide8
Framework
8
Liu
hep
-ph/0408234
N. Craig et al
arXiv:1103.3708Slide9
Gauge-Mediated-SUSY-Breaking
Hidden SectorG1 Sector
G2 Sector
9Slide10
Gauge Symmetry Breaking
G1G2
SM Gauge Symmetry
10Slide11
Gauge Coupling Constants
11
orSlide12
Yukawa Coupling
Only Yukawa coupling for 3rd generation allowed Irrelevant operators allowed by G1 G2 exist
After Gauge Symmetry Breaking
12Slide13
Produce Yukawa Coupling
An extra vector-like generation under G2
13
N. Craig et al
arXiv:1103.3708Slide14
Higgs mass and A-term
A. Arbey et al arXiv:1112.3028
14Slide15
Higgs-Messenger coupling
Z. F. Kang et al arXiv:1203.2336
15Slide16
Fields in G2 sector
16Slide17
Strong Unification
The ratio of gauge couplings flow to an infrared fixed point
D.
Ghilencea
et al
hep
-ph/9707462
17
Landau Pole
EW scale
Intermediate scale M
Slide18
Gauge coupling running
Landau Pole
EW scale
Intermediate scale M
18
Slide19
Summary
Effective SUSY can reconcile naturalness requirement with experimental results A realistic model is introduced and its phenomenological consequence discussedNot only hierarchy among sparticles but also fermions among three generations can be producedStrong coupling can be predicted without Grand Unification
19