collider phenomenology of susy cosmic connections
DESCRIPTION
Collider Phenomenology of SUSY Cosmic Connections. &. 杨 金 民. 中科院理论物理所. 2006.9.16 于清华. 目 录. 1 、 Introduction to SUSY. 2 、 Fine-tuning & SUSY. 3 、 GUT & SUSY. 4 、 Cosmic Dark Matter & SUSY. 5 、 SUSY at Colliders. 6 、 Conclusion. 1 、 Introduction. 1.1 What is and why SUSY ?. SUSY. - PowerPoint PPT PresentationTRANSCRIPT
Collider Phenomenology of SUSY
Cosmic Connections
杨 金 民中科院理论物理所
2006.9.16 于清华
&
目 录1 、 Introduction to SUSY
2 、 Fine-tuning & SUSY
3 、 GUT & SUSY
4 、 Cosmic Dark Matter & SUSY
5 、 SUSY at Colliders
6 、 Conclusion
1 、 Introduction
|F |B SUSY
1.1 What is and why SUSY ?
起源 :
起源于 60 年代末 ; 起源于纯数学逻辑
物理模型创建于 70 年代初
一直是研究热点,有 30000 篇文章发表 !
Why ?
Fine Tuning
GUT
ElectroweakBaryogenesis
Affleck-DineBaryogenesis
Inflation
Dark Matter
SUSY
SUSY
超对称是物理吗?超粒子有多重?LHC 上发现?
???
R- 宇称 R- 宇称
1.2 SUSY Models
MSSM NMSSM
Singlet S
MSSM mSUGRA
mSUGRA
不同的破缺机制
Split-SUSY
• Fine-tuning • GUT • 暗物质
TeV-Scale SUSYall sparticles < TeV
5 Higgs bosons1 < 130 GeV
4 < TeV
sparticles
Higgs Bosons1 < 150 GeV
4 : superheav
y
Gauginos/Higgsinos < TeV
Others : superheavy
Weak Scale 100 GeV
1 TeV SM break
1015 GeV
2. Fine-tuning & SUSY
1019 GeV
GUT
究竟是多大?
2100 GeV
Bare
In SUSY:
2 cancel
remain
How heavy ? Depends on
More about
Higgs mass:
EW baryogenesis:
3. GUT & SUSY
not sensitive to sfermions
light gauginos/higgsino (??)
SU
SY
SM
sfermions
gauginos/higgsino GUT
Maybe unaccessible at LHC
Light !Not necessarily so light for LHC
4. Dark Matter & SUSY
Mass: weak-scale
Interaction: weak-scale
Dark Matter
WIMP
Which one is LSP dark matter ?
LSP ?
LSP (Dark Matter)
mSUGRA
Split-SUSY
sfermions
gauginos/higgsino
DarkMatter
Maybe heavyMaybe unaccessible at LHC
Light !Most likely so light for LHC
5 、 SUSY Search at Colliders
LEP (I, II)Tevatron I
Tevatron II
LHC
closed
on-going
up-coming
ILC imagining
LEP (I, II)
Tevatron (I,II)
SUSY
tan > 2
m h , m A ,
m H >
95 GeV
Selectron > 100 GeV
Smuon > 97 GeV
Stau> 93 GeV
100 GeV < stop
100
GeV
< s
bott
om
100 GeV < squark
103.5 GeV < chargino47 GeV < neutralino
LEP
stop -> c chi
stop -> b l snu stop -> c chi
Tevatron
LHC ILC
沙漠淘金!
1 粒金子 /100 亿粒沙子
LHC ILC
在 LHC 上发现
在 ILC 上精确测量粒子谱
LHC: SUSY Typical Signature
ET
b
b
b-jet
b-jet ET
LHC
Sparticlessfermions
gauginosHiggsinos
squarks
sleptons
gluinocharginosneutralinos
Higgs Bosonsh, H (CP-even)
H
A (CP-odd)
What SUSY partilces can be found at LHC?
Depends on good
detection capabilities
for b’s and tau’s
只能发现 h
, muonsH A
Gold-plated signal
LEP II excluded
LHC
TeV-scale SUSY
mSUGRA
LHC
LHC Dark Matter Constraint
sparticle
sfermion
gauginohiggsino
MSSM
SplitSUSY
man
y
seve
ral
maybe no
?
Higgs h, H
A, H
all
at least h
onl
y h
Split-SUSY
+
1-
1pp
e+e- +
1-
1
h H, A, H sfermions gaugino/Higgsino
Higgs bosons sparticles
SM
weak-scale SUSY
Split-SUSY
??
??
LHC
LHCweak-scale
SUSY 发现初步测量参数
预言
暗物
质密
度
ILC
精确
测量
精确预言暗物质密度
astrophysics
6 、 Conclusion
E. Witten2002, Beijing