Post on 17-Mar-2018
SupersymmetryS. James Gates, Jr.
University System of Maryland Regents Professor, Distinguished University Professor
John S. Toll Professor of Physics,Center for String and Particle Theory Director, and
Affiliate Mathematics Professor
University of Maryland, Physics Department, Rm. 1117, College Park, MD 20742-4111 http://umdphysics.umd.edu/people/faculty/135-gates.html
(a.) Higgs Boson(b.) Gravitational Waves(c.) Superpartners(d.) Evidence of Superstrings
(a.) Higgs Boson(b.) Gravitational Waves(c.) Superpartners(d.) Evidence of Superstrings
(a.) Higgs Boson(b.) Gravitational Waves(c.) Superpartners(d.) Evidence of Superstrings
(a.) Higgs Boson(b.) Gravitational Waves(c.) Superpartners(d.) Evidence of Superstrings
From The SM To The With Higgs
The Higgs And The LHC
Overview of LHC Higgs Production Factory
A Higgs Production & Decay Process
A Higgs Production & Decay Process
Productivity & Performance
From The SM To The MSSM
gµυ (graviton)
Ψµd (gravitino)
Gµi (gluon)
λi (gluino)
Aµ (photon)λ (photino)
(charged IVB) Wµ+
(+charged Wino) W+
(neutral IVB) Zµ0
(neutral Zeno) Z
(charged IVB) Wµ−
(-charged Wino) W−
Force Carriers (Gauge Particles)
0
0
80.6
?
0
0
91.2
?
0
?
80.6
?
0
0
+1
+1
0
0
0
0
0
0
-1
-1
2
3/2
1
1/2
1
1/2
1
1/2
1
1/2
1
1/2
M Q S
~
~
~
~
~
uu (up-squark)
cc (charmed-squark)
tt (top-squark)
d(down-squark) d
s(strange-squark) s
b(bottom-squark) b
SQuarks & Quarks
4x10-3
?
7x10-3
?
1.5
?
0.15
?
173
?
4.7
?
2/3
2/3
-1/3
-1/3
2/3
2/3
-1/3
-1/3
2/3
2/3
-1/3
-1/3
1/2
0
1/2
0
1/2
0
1/2
0
1/2
0
1/2
0
M Q S
~
~
~
~
~
~
υe
υe (e-sneutrino)
υµ
υµ (µ -sneutrino)
υτ
υτ (τ -sneutrino)
SLeptons & Leptons
~0
?
5x10-4
?
~0
?
0.106
?
~0
?
1.784
?
0
0
-1
-1
0
0
-1
-1
0
0
-1
-1
1/2
0
1/2
0
1/2
0
1/2
0
1/2
0
1/2
0
M Q S
e(selectron) e
µ(smuon) µ
τ(staon) τ
mass unit GeVc2
mυ → 10−8/10−4/10−2
~
~
~
~
~
~
LHC Search For The MSSM (Sci Run-1)
Wrong!
In my view, the current situation is akin to thatofan explorer who, having scoured the easternseaboard of North America, concludes that nogroves of Sequoiadendron giganteum exist inthe entire continental USA.
As with this hypothetical hunt for giantsequoia trees, finding evidence for SUSYdepends on the observer looking in the rightplace.
Effects: MSSM vs. SM Five Higges
Q: Why Would Nature Possess More Than One Higgs?
A: More Local Symmetries or …
Q: Why Does SUSY Possess More Than One Higgs?
A: Anomalies!
But There Are QuantumDangers: Anomalies
But There Are QuantumDangers: Anomalies
Effects: MSSM vs. SM Couplings
‘Running Constants’
A Comparison
Effects: MSSM vs. SM Naturalness
Effects: MSSM vs. SM Dark Matter
Much Older Then ButMuch Younger Now
If the ‘anomalies in the branching ratios’grow after more analysis of data, thenthe post-Standard Model Era will havebegun -- a rich spectrum of Higgs-likefields could be the avatars for theexistence of symmetries beyond those ofthe SM…maybe even SUPERSYMMETRY.
Effects: Taming The Quantum Vacuum
THANK
YOU