Conformal Dynamics and EWSBseminar/2008/soryushi/Sannino_09030… · Francesco Sannino Kyoto 2009 ....
Transcript of Conformal Dynamics and EWSBseminar/2008/soryushi/Sannino_09030… · Francesco Sannino Kyoto 2009 ....
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Conformal Dynamics and EWSB
Francesco Sannino
Kyoto 2009
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Thank you Koichi
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Dynamical Electroweak Symmetry Breaking
Unparticle Physics
.....
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Natural Asymmetric Dark Matter
Electroweak Baryogenesis
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We can probe the dynamics of our extensions
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DEWSB
Need for CFT
Status-of-the-art 4D Non-SUSY CFT
Asymmetric Dark Matter
(Ultra) Minimal Walking Models
Plan
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Low Energy Effective Theory
SM
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Dynamical EW Breaking
Dots are partially fixed by Anomalies as well as other principles
L(H)! "14F aµ!F a
µ! + i Q̄!µDµQ + · · ·
· · · ! L(New SM Fermions)
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Technicolor
New Strong Interactions at ~ 250 GeV [Weinberg, Susskind]
Natural to use QCD-like dynamics.
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Large & Positive S from QCD-like Technicolor
Peskin and Takeuchi, 90
1 TeV
SU(3) + 1 Fund. Doublet
S
T
Kennedy-Lynn, Peskin-Takeuchi, Altarelli-Barbieri, Bertolini- Sirlin, Marciano-Rosner
Weinberg, Susskind
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Masses to SM Fermions
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The need to Extend Technicolor
L̄ · HeR ! L̄Q̄Q
!2ETC
eR
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Different Approaches
Scalar-less New Gauge Interactions (Extended TC)
Marry SUSY and Technicolor
Add New Scalars in the Flavor Sector
.....
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Extended Technicolor
PNGMasses
SM-FermionMasses
FCNCOperators
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Beta - Terms
mf !g2
ETC
!2ETC
< Q̄Q >ETC
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Gamma - Terms
!ETC ! 103!TC
< Q̄Q >ETC !< Q̄Q >TC " !3TC
mf !g2
ETC
!2ETC
< Q̄Q >ETC " mTop
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Walking versus Running
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Near Conformal Properties
Appelquist, Bowick, Chivukula, Cohen, Eichten, Georgi, Hill, Holdom, Karabali, Lane, Mahanta, Miransky, Shrock, Simmons, Terning, Wijewardhana, Yamawaki
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Why the walking can help ?
QCD-Like
Near the conformal window
~
~
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Fermion Mass Enhancement
mf !g2
ETC
!2ETC
< Q̄Q >ETC=g2
ETC
!2ETC
!!ETC
!TC
"!m("!)
< Q̄Q >TC
Appelquist, Christiansen, Shrock, Piai
Recent ETC models
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S in Walking Technicolor
We will take as an estimate:
Appelquist, F.S.Kurachi Shrock
SWTC < STC
SWTC ! Snaive =16!
Nf
2d(R)
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Besides
S = S(W )TC + SNS
Offset the first term
Rule:
Find Walking Theories with EW embedding minimizing S
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Progress in Strong Dynamics I:
F.S. and Tuominen 04Dietrich, F.S. 06
Ryttov, F.S. 07
Newly Conjectured all-orders beta function
Phase Diagrams for SO(N) and Sp(2N) F.S. 09
Analytically discovered a universal picture
Phase Diagrams for SU(N)
Useful methods to understand Near-Conformal Dynamics
Conformal Chiral DynamicsF.S. 08F.S. and R. Zwicky 08Stephanov 07
Ryttov, F.S. 07
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Progress in Strong Dynamics II:
Catterall, F.S. 07Catterall, Giedt, F.S., Schneible 08Del Debbio, Frandsen, Panagopoulos, F.S. 08Del Debbio, Patella, Pica. 08Hietanen, Rantaharju, Rummukainen, Tuominen 08DeGrand, Shamir, Svetitsky, 08Del Debbio, Patella, Pica, 08
Lattice
Appelquist, Fleming, Neil 07 Deuzman, Lombardo, Pallante 08Fodor, Holland, Kuti, Nogradi, Schroeder, 08
Any Rep. Fund. Rep
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Phases of Gauge Theories
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QCD-like Theory
UV
UV
IR
IR
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Coulomb
UVUV IRIR
IR Conformal Phase
IR Conformal behavior
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Gauge Theory Knobs
Gauge Group, i.e. SU, SO, SP
Matter Representation
# of Flavors per Representation
Matter Density (i.e. Chemical Potential)
Temperature
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Example
SU(N)
Adjoint Dirac Matter
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!(g) = ! !0
(4")2g3 ! !1
(4")4g5 +O(g7)
!0 = 0
! = 0
Weakly Coupled
Strongly Coupled
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Beta Function
Ryttov and F.S. 07
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Ryttov and F.S. 07
All orders beta function conjecture
!(g2) =32C2(r)
g2
4"2+ O(g4)! = !d lnm/d lnµ
!0 =113
C2(G)! 43T (r)Nf
!!0 = C2(G)! T (r)Nf
!(g) = ! g3
(4")2!0 ! 2
3T (r)Nf#(g2)
1! g2
8!2 C2(G)(1 + 2"!0
"0)
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Running in Yang - Mills for different N
1.00.5 2.00.2 5.0 10.0
4
6
8
10
!!Gev"
g2N
All Orders2-loops1-loop
SU(2)SU(3)SU(4)
Luscher, Sommer, Wolff, Weisz, 92Luscher, Sommer, Weisz, Wolff 94Lucini and Moraitis 07
SU(2)
SU(3)SU(4)
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Bounds on the Conformal Window
Ryttov and F.S. 07
! = 0
Unitarity of the Conformal Operators demands:
! ! 2
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Back to the ExampleSU(N) Adjoint Dirac Matter
! ! 2 , =" N cf #
118
N cf Ladder
= 2.075
! = 1 , =! N cf =
116
= 1.83̄
Pelasing Discovery!
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Back to the ExampleSU(N) Adjoint Dirac Matter
NAsympf = 2.75
! ! 2" N cf #
118
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A Universal Picture
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Fund
2A
2S Adj
Ladder
Catterall, SanninoDel Debbio, Patella,PicaCatterall, Giedt, Sannino, Schneible
Iwasaki et al.
Appelquist, Fleming, NeilDeuzeman, Lombardo, Pallante
×
×
! = 1 ! = 2
Shamir, Svetitsky, DeGrand
SU(N) Phase Diagram
Ryttov and F.S. 07All Orders Beta Function
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Be Imaginative!
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5 6 7 8 9 100
5
10
15
20
N
Nf
A.F.B.F. & γ= 2 SD
SO(N)
SO(N) Phase Diagram
F.S. 09All Orders Beta Function
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Sp(2N) Phase Diagram
F.S. 09All Orders Beta Function2 3 4 5 60
5
10
15
20
25
30
35
N
N Wf
A.F. B.F. & γ= 2 SD
SP(2N)
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Sensible Models of DEWSB
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Identified Many EW Viable Walking and Custodial TC Models
Minimal Walking Technicolor (MWT)
Higher Dimensional Representations
Ultra Minimal Walking Technicolor (UMT)
Beyond Minimal Walking Technicolor
Partially EW Gauged Technicolor
Split Technicolor
Additional Fermions in SM
Custodial TC
F.S. - Tuominen 04Dietrich - F.S. - Tuominen 05Dietrich - F.S. 06
Ryttov, F.S. 06
Appelquist, F.S. 98Foadi, Frandsen, F.S. 07Similar to BESS models of
Casalbuoni et al.
Ryttov, F.S. 08
F.S. - Tuominen 04Dietrich - F.S. - Tuominen 05Dietrich - F.S. 06
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Dark Matter
!DM
!B! 5
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To the presence of a U(1) baryon number approx. conserved.
We observe a B - Anti B asymmetry.
If the asymmetry is generated above the EW scale the conservation of B - L by the EW interaction allows B to survive the EW phase transition.
The point above does not imply B - L conserved at energies higher than the EW scale.
!B
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A particle similar to the nucleon
But electrically neutral
At most EW-type cross sections
Great if connected to the Electroweak Symmetry Breaking sector of the SM
What if DM is due to an asymmetry?
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Technibarion is similar to the nucleon
TB number like the B number
At most EW-type cross sections
EW scale and interactions built in
Technicolor is a natural example(TIMP)
Nussinov, 86Barr - Chivukula - Farhi 90Sarkar 96Gudnason - Kouvaris - F.S. 06
Ultra Minimal Technicolor is the first physical realization Ryttov - F.S. 08
PAMELA/ATIC Decaying Dark Matter + Unification, Nardi, F.S., Strumia, 08.
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TIMP can be a Boson or a Fermion
Can be (or not) neutral w.r.t. Weak Interactions
Within Technicolor
TIMP is a pseudo Goldstone-boson
Ultra Minimal Technicolor
Ryttov - F.S. 08
Composite Unparticle + TC F.S. - Zwicky 08
Unbaryon (To investigate)
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Plus sign minus signCDMS II Ge CombinedXENON10 2007 Projected superCDMS
Foadi, Frandsen, F.S. 08
(GeV)
10 50 100 500 1000 5000 1! 10410"45
10"44
10"43
10"42
10"41M#
$nucleon!cm"
2 "
!nucleon =µ2
4"
!Z
A
8" # dB
!2+
dM fmN
M2HM!
"2
µ = M!mN/(M! + mN )
MH = 300 GeV
dB = ±1! =3 TeV
dM = 1
Earth Based Constraints
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Asymmetric DM Relic Density
mTB
mp! 1 TeV
1 GeV= 103
TB
B! exp
!"mTB(T !)
T !
"# 10"3 T ! ! 200 GeV
!TB
!B=
TB
B
mTB
mp! O(1)
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ConditionsUniverse Electric Neutrality
Chemical Equilibrium
EW Sphaleron Processes, Kuzmin-Rubakov-Shaposhnikov
TB - B violated at High Energies & approx. conserved at EW
(Extra) EW Phase Transitions
Cline, Jarvinen, F.S. 08Jarvinen, Ryttov, F.S. 09
Baryogenesis
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Minimal Walking Technicolor
F.S. and Tuominen 04
Dietrich, F.S. Tuominen 06
Foadi, Frandsen, Ryttov, F.S. 07Cline, Jarvinen, F.S. 08
Belyaev, Foadi, Frandsen, Jarvinen, Pukhov, F.S. 08
Gudnason, Kouvaris, F.S. 06Gudnason, Ryttov, F.S. 06
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SU(3)
SU(2)
U(1)
U
D
Gt-up
t-down
t-glue SU(2)
NExtraNeutrino
EExtra Electron
U and D: Adj of SU(2)
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The most economical WT theory
Compatible with precision measurements
Possible DM candidates and nice Unification
Can support 1st order Electroweak Phase Transition
Can support exotic electric charges
Lattice studies have begun
MWT Features
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Drell-Yan production of heavy vectors
Vector Boson Fusion production of heavy vectors
Can be seen via HW and HZ production
MWT effective lagrangian
L(Composites) + L(Mixing with SM) + L(New Leptons) + L(SM!Higgs)
LHC - Signals
A. Belyaev, R. Foadi, M. T. Frandsen, M. O. Jarvinen, A. Pukhov, F.S. 08
R. Foadi, M. T. Frandsen, Ryttov, F.S. 07
Appelquist, F.S. 99
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Ultra Minimal Walking TechnicolorRyttov and F.S. 08
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SU(3)
SU(2)
U(1)
U
D
Gt-up
t-down
t-glue SU(2)
!2!1
t-lambda
U and D: Fund of SU(2)
t-lambdas: Adj of SU(2) Singlet of SM
Weyl Fermions
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The most economical “2 rep” WT theory
Smallest naive S-parameter & # of fermions
Asymmetric DM candidate visible at the LHC
Extra Electroweak PT (very exciting)
Rich unexplored Collider Phenomenology
UMT Features
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• DEWSB is very much alive
• DEWSB Cosmology is exciting
• 4D Non-SUSY CFT
Summary