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