ohio state dusel theory workshop stuart raby underground detectors investigating grand unification...
TRANSCRIPT
Ohio State DUSEL Theory Workshop
Stuart Raby
Underground Detectors Investigating Grand
UnificationBrookhaven National Lab
October 16, 2008
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Targeted for NSF National Science Board,members of Congress and their staff
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Virtues of SUSY GUTs
MZ << MGUT “Natural” Explains charge quantization Predicts gauge coupling unification !! Predicts SUSY particles at LHC
Title of talk 10
Grand Unification - SO( 10 ) GUT
spinor repsn.of SO( 10 )
tensor product of 5 spin ½ w/even no. - signs
GeorgiFritszch & Minkowski
Title of talk 11
Gauge coupling unification !!
S. Dimopoulos,S.R. &
F. Wilczek
LEP data !!
Title of talk 12
Supersymmetric partners of SM particles
Quarks & Leptons Squarks & Sleptons
Gluons, W+, Z0, Higgs bosons
Gluinos, Charginos, Neutralinos
Lightest super symmetric particle ( LSP )is stable (assuming R parity) Perfect Dark Matter Candidate !
Tevatron or LHC at CERN 2009
SUSY light Higgs
Title of talk 13
Virtues of SUSY GUTs
Predicts proton decay
Is it predominantly due to Vector boson exchange ? Color triplet Higgsino exchange ?
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The answer depends on -
4 dimensional SUSY GUTs
vs
5 or 6 dimensional Orbifold SUSY GUTs and / or10 D string theory
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4 dimensional SUSY GUTs
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Vector boson exchange ~ 1/MG2
u
u 0
u
d e
P
u
0Proton
e
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0
433
2 5~ 8 10 yearsG
P eG P
M
m
Non-SUSY GUT -- MG ~ 1015 GeV EXCLUDED !SUSY GUT -- MG ~ 1016 GeV OK !!
Super-Kamiokande bound
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Higgsino exchange dominates ~ 1/MT
Gln (MT/ MG) MT ~ 1014 GeV
A( p K+ ) ~ C C x loop factor MT
Minimal SUSY SU(5)
Proton decays toooo fast !!
Title of talk 20
Threshold corrections due to Higgs doublet-triplet splitting (positive) & GUT breaking sector (negative)
G.C. Unif. & Proton decay 4DGln (MT
eff / MG) + (GUT B.S.)
Dermisek et al., Babu et al. , Altarelli et al.
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5 or 6 dimensional Orbifold SUSY GUTs and10 D string theory
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SU5 Orbifold GUT on M4 x S1/(Z2xZ2’)
Higgs bosons
Title of talk 23
5D Orbifold GUT
G.C. Unif. & Proton decay > 4D
0 R
Mc ~ R < MG < M*Dienes et al., Hall & Nomura,Kim & S.R., Feruglio et al.
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5D Orbifold GUT
G.C. Unif. & Proton decay > 4D
0 R
Mc ~ 1/R < MG < M*
u 0
u
de
P
0Proton
e
Dim 6 amp. ~ 1 / Mc2
Mc
Enhanced !!u u
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5D Orbifold GUT
G.C. Unif. & Proton decay > 4D
0 R
Mc ~ 1/R < MG < M*
u 0
u
de
P
u
0Proton
e
Dim 6 amp. ~ 1 / Mc2
Mc
Suppressed !!
u
Bulk
U
E
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5 or 6 dimensional Orbifold SUSY GUTs Vector boson exchange rate - typically enhanced !
Higgsino exchange rate - suppressed !
Title of talk 27
5D Orbifold GUT
G.C. Unif. & Proton decay > 4D
0 R
Mc ~ 1/R < MG < M*
String / Orbifold GUTs
SU6 SU5 SM
Bulk = Untwisted sectorBrane = Twisted sector
Proton decay rate ‘typically’ enhanced !
Title of talk 28
5D Orbifold GUT
G.C. Unif. & Proton decay > 4D
0 R
Mc ~ 1/R < MG < M*
The Bottom Line
4D SUSY GUTs Higgsino exchange dominates
5-6D Orbifold SUSY GUTs Both processes may compete
3413p K 3 10 years
34p 10 years
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Virtues of SUSY GUTs
Predicts Yukawa coupling unification w/Family symmetry Fermion mass hierarchy
Neutrino masses and mixing via See-Saw
Title of talk 30
Eg. SO(10) x [ D3 x U(1) family sym. ]
Dermisek & S.R. hep-ph/0507045
7 real para’s + 4 phases
+ 3 real MajoranaNeutrino masses
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Dermisek, Harada & Raby, hep-ph/0606055
Title of talk 320.68 (0.03)
Title of talk 33NOT in fit
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Albright & Chen hep-ph/0608137
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Virtues of SUSY GUTs
Baryogenesis via leptogenesis
Right-handed neutrino decays (+ CP viol.) creating lepton asymmetry
Lepton asymmetry converted to baryon asymmetry via electroweak int’s
Expect low energy leptonic CP violation !
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Virtues of SUSY GUTs
LSP - Dark Matter candidate
Expect direct detection of Dark Matter !
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We need a distribution list for announcing the white paper
The White paper also has sections onNeutrinoless double beta decay &
N-Nbar oscillations
Conclusions
Title of talk 42
Megaton Observatory for Neutrinos & Nucleon Decay
MONND
A large Megaton multi-purpose water Cherenkov detector
needs a catchy name
My suggestion
Finally