francesco sannino€¦ · september 2011 francesco sannino technicolor after the higgs discovery...
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September 2011
Francesco Sannino
Technicolor after the Higgs Discovery
CP3-DESY-Goettingen School 11-14 October 2011SCGT12 @ Nagoya 2012
Thursday, December 6, 12
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Atoms4%
Dark Matter22%
Dark Energy74%
??
Now
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Future pie ?
๏ New weak & strong forces
๏ Composite Higgs/SM
๏ Composite dark matter
๏ Composite inflation
๏ ....
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The scent of the Higgs
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2 bumps
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Higgs discovery ?
6σ
SM HiggsExpectation
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Fundamental ?
๏ Would be the first time
๏ Spinors are space-time constituents
๏ Scalars are derived
๏ Susy? Can be emergentIn <4d: Sung-Sik Lee 064d: Antipin, Mojaza, Pica, Sannino 10
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Compositeness
๏ Only Higgs sector is composite [Technicolor]
๏ Standard Model Fermions are composite [Preons]
๏ Partial compositeness: Bosonic/SUSY Technicolor ...
๏ X compositeness [Magnetic Standard Model] Sannino 11
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What LHC has not seen, yet!
๏ Extra large, small or medium dimensions [kk states,..]
๏ Any sign of supersymmetry [gluino,...]
๏ Extra, mini, large Black-Holes [low scale gravity]
In line with:
Composite dynamics
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Technicolor
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Is “Old” Technicolor dead?
Old TC was dead 2 decades ago!
-0.2 0.0 0.2 0.4-0.1
0.0
0.1
0.2
0.3
0.4
0.5
S
T
SU(3) + 1 Fund. Doublet Weinberg, Susskind
1 TeV
TC alone = massless SM fermions
Extend TC to generate fermion masses [Eichten & Lane]
MH =FTC
F⇡M� ' 1.5 TeV
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Need to go beyond QCD
๏ TC-fermion condensate enhancement/FCNC decoupling
๏ Minimal Technicolor passing precision tests
๏ Need a Technicolor Higgs
๏ Dark matter candidates
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Walking
UVIR
IR Conformal behavior
Holdom, Appelquist, Miranski, Yamawaki, Wijewardhana...
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Gauge Group: SU, SO, SP, Exceptional
Matter Representation
# of Flavors per Representation
Knobs
NfQCD IR Conformal Infrared free
?
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α
Energy
Interesting structure at large Nf
A novel phase @ large Nf
NfQCD IR Conformal Asymp. Safe
First coefficients at large Nf are knownPica & Sannino 10
�UV =3⇥
TFNf
Ciuchini, Derkachov, Gracey, Manashov ‘99
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Universal Picture
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SU(N)
2 3 4 5 6 7 8
2
4
6
8
10
12
14
16
18
N
n f
Fund
A-Sym
Sym
Adj
Ryttov & Sannino 07Dietrich & Sannino 07Sannino & Tuominen 04
Ryttov & Shrock 10
Very interesitng
Poppitz & Unsal 9, 10
Pica & Sannino 10
SU(N) Phase Diagram
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SU(N)
2 3 4 5 6 7 8
2
4
6
8
10
12
14
16
18
N
n f
Fund
A-Sym
Sym
Adj
Lattice SU(N) Diagram
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5 6 7 8
2
4
6
8
10
12
N
n f
SO(N)
2 3 4 5 6 7 8
246810121416182022
n
n f
SOH2n+2L
2 3 4 5 6 7 8
2
4
6
8
10
12
14
16
18
n
n f
SOH2n+1L
All Orders g*=1
Four Loops g*=1
Ladder
All Orders g*=1
Four Loops g*=1
Ladder
Thursday, May 24, 12
2 3 4 5 6 7 8
246810121416182022
n
n f
SOH2n+2L
2 3 4 5 6 7 8
2
4
6
8
10
12
14
16
18
n
n f
SOH2n+1L
All Orders g*=1
Four Loops g*=1
Ladder
All Orders g*=1
Four Loops g*=1
Ladder
Thursday, May 24, 12
G2 F4 E6 E7 E8 ê Ad2
4
6
8
10
12nf
All Orders g*=1
Four Loops g*=1
Ladder
Thursday, May 24, 12
Exceptional
Sannino 09Pica & Sannino 10
Mojaza, Pica, Ryttov Sannino 12
Mojaza, Pica, Ryttov Sannino 12
Mojaza, Pica, Ryttov Sannino 12
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Walk or Jump ?
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Walking
-120 -100 -80 -60 -40 -20 00.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
ln m
aHmL
d=-1ê8d=-0.01d=-0.002d=-0.001d=0.0005
0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4
-0.3
-0.2
-0.1
0.0
0.1
a
b MY
d=0.1d=0d=-0.1d=-0.2
�MY = �↵2�(↵� 1)2 � �
�
Miransky 85Miransky & Yamawaki 89Miransky & Yamawaki 97Yamawaki, Bando, Matumoto 86Appelquist, Karabali, Wijewardhana 86
� = nf � ncf
Sannino 2012
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Condensate Enhancement
h ¯QQiµ = exp
Z ↵(µ)
↵(⇤)d↵
�(↵)
�↵2((↵� 1)
2+ |�|)
!h ¯QQi⇤
' exp
�(1)
Z ↵(µ)
↵(⇤)d↵
1
�MY
!h ¯QQi⇤ =
⇣µ⇤
⌘�(1)h ¯QQi⇤
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-10 -8 -6 -4 -2 00.0
0.2
0.4
0.6
0.8
1.0
1.2
ln m
aHmL d=0.1
d=0.05
d=0
d=-0.2
d=-0.1
d=-0.05
0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4-3
-2
-1
0
1
a
b Jump
d=0d=-0.05d=-0.2
0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4
-4
-3
-2
-1
0
1
2
a
b Jump
d=0d=0.05d=0.2
Jumping
�Jump = �↵2 1� � � ↵
1� ↵
Sannino 2012
� = nf � ncf
hQ̄Qiµ ' �(1) ln⇣µ
⇤
⌘h Q̄Qi⇤
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Walking or Jumping?
0.80 0.85 0.90 0.95 1.00 1.050.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
n fn fc
L@n fD
LJump
LMY
⇤MY =
µ0
ncf � nf
exp
"� ⇡
2
pncf � nf
#
⇤Jump = ⇤c
⇥1� (nc
f � nf ) ln�ncf � nf
�⇤
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SU(N)
2 3 4 5 6 7 8
2
4
6
8
10
12
14
16
18
N
n f
Fund
A-Sym
Sym
Adj
SU(N) Phase Diagram
Walking region?
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Calculable 4D Walking Example
Antipin, Mojaza, Sannino 1107.2932Grinstein, Uttayarat 1105.2370
Antipin, Di Chiara, Mojaza, Mølgaard, Sannino 1205.6157
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Walking 4D Gauge theory
Tr
�1
2Fµ⌫Fµ⌫ + i�̄ /D�+Qi /DQ+ @µH
†@µH + yHQHQ
�
�u1(Tr[H†H])2 � u2Tr(H
†H)2 .
Fields [SU(Nc)] SU(Nf )L SU(Nf )R U(1)V U(1)AF
� Adj 1 1 0 1
q ⇤ ⇤ 1 Nf�Nc
Nc�Nc
Nf
eq ⇤ 1 ⇤ �Nf�Nc
Nc�Nc
Nf
H 1 ⇤ ⇤ 0 2NcNf
Gµ Adj 1 1 0 0
Antipin, Mojaza, Sannino 2011Thursday, December 6, 12
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↵
�
Conformal Window and Walking
Antipin, Di Chiara, Mojaza, Mølgaard, Sannino 2012
12% of the CW is Walking
4.42
4.4167
4.4133
x = 4.41
0.00 0.01 0.02 0.03 0.04 0.05 0.06-3.0
-2.5
-2.0
-1.5
-1.0
-0.5
0.0
ag
105 âb a
g
4 6 8 10 12 14 16 18
4.35
4.40
4.45
4.50
Nc
Nf
Nc
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A Minimal TC template
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Since 2004 - Minimal WTC is Higgsfull[Original Name: Light Composite Higgs]
Sannino, Tuominen 04Hong, Hsu, Sannino 04Dietrich, Sannino, Tuominen 05
Being analyzed by ATLAS & CMS
Extra Electron
NExtraNeutrino
Ut-up
Dt-down
Gt-glue
SU(2)
Higgs
⇣SU(3)
SU(2)
U(1)
Higgs๏ Can feature Light TC/Dilaton Higgs
๏ Smallest S-parameter & FCNC
๏ Dark matter candidates
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TC Higgs
TC - Higgs is the lightest spin-0 scalar made of TC-fermions
QCD lightest scalar is f0(500) with mass ~ 400-550 MeVSannino & Schechter 95 PRD [‘t Hooft 1/N, crossing, chiral, pole mass]Harada, Sannino & Schechter 95 PRD [f0(980)], 96PRL Pelaez - Confinement X - lecture
Will contain also a techniglue component
H ⇠ c1Q̄Q+ c2Q̄QQ̄Q+ · · ·
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Higgs Effective Theory
L = LSM +
✓1 +
2r⇡v
H +s⇡v2
H2
◆v2
4Tr DµU
†DµU +1
2@µH @µH
� mt
⇣1 +
rtvH⌘"
qL U
1
2+ T 3
!qR + h.c.
#
� mb
⇣1 +
rbvH⌘"
qL U
1
2� T 3
!qR + h.c.
#+ · · ·
� �S W aµ⌫B
µ⌫ Tr T aUT 3U † +O✓
1
M⇢
◆q ⌘ (t, b)
v ' 246 GeVU = exp
⇣i⇡aT a/v
⌘
DµU ⌘ @µU � igW aµT
aU + ig0UBµT3
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EW - corrections
t
W Z
LH � 2 m2W r⇡v
H W+µ W�µ +
m2Z r⇡v
H Zµ Zµ � mt rtv
H t̄ t
+m2
W s⇡v2
H2 W+µ W�µ +
m2Z s⇡2 v2
H2 Zµ Zµ
M2H = (MTC
H )2 +3(4⇡F⇧)2
16⇡2v2
�4r2tm
2t + 2s⇡
✓m2
W +m2
Z
2
◆�+�M2
H(4⇡F⇧)
Foadi, Frandsen, Sannino, 12
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How light is the TC-Higgs ?
(MTCH )2 ' M2
H + 12 2r2tm2t
0.0 0.5 1.0 1.5 2.0
200
400
600
800
1000
1200
k rt
MHTCHGe
VL
k rt ~ TC x ETC
Not too light!
F⇧ = v
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Geometric not too light TC Higgs
Modify underlying gauge geometric structure
Change # of TC-colors, matter repr., EW doublets
By geometric scaling QCD f0(500) to EW we have
d(2� indexTC) = NTCNTC ± 1
2
Physical Higgs mass via gauge geometry
MTCH ' 1.8
1pNDd(RTC)
TeV
Sannino 08Sannino & Schechter 07Foadi, Frandsen, Sannino 12
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Higgs - like H
TC Axial - Vector States R1,2
Minimal TC states to discover
TC pions
TC composite fermions
Elementary Leptons
Unexpected ......
Beyond minimal: (E)TC model dependent
⇧
L
U
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LHC Search Strategy
๏ Indirect hint of heavy states
• Modified Higgs couplings wrt SM
• Study Higgs in association with W/Z
๏ Direct discovery of heavy states
• Drell-Yan production of TC-rho/axial
• (exotic) pions
• composite fermions
• 4th heavy lepton family
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�(H ! ��) ⇠
0
@rt � 7rW +3
4
X
QTC
d(RTC)e2TC
1
A2
LH � 2 m2W rWv
H W+µ W�µ � mt rt
vH t̄ t
pp ! H ⇠ r2t
Sensitive TC-fermion content
H to !! can help discriminate different models
and to the H-tt coupling rt (Extended TC)
Higgs to γγ
Thursday, December 6, 12
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Potential discovery of composite dynamics at the LHC
Belyaev, Foadi, Frandsen, Jarvinen & Sannino 08Composite spin-1 mesons like QCD " & a1
Associate production
) (GeV)-l+lbM(b400 500 600 700 800 900 1000 1100
/dM
(fb
/10
GeV
)σd
-410
-310
-210
-110
1
=5, S=0.3g~=700 GeV, AM
=125 GeVhsm, m
=702 GeVR1M
=1055 GeVR2M
> 25GeV2,b
> 45GeV, p1,b
| < 4.5, pb
|y
> 20GeVl
| < 2.5, pl
|y
) < 135 GeVb)>0.7, 110 GeV < M(b,bR(b,Δ
= 8TeVspp @
)-l+ l→Z, (Z b b→pp
pp ! HZ± ! b̄b+ 2`
Preliminary MWTC - theoretical updated analysis by T. HapolaThursday, December 6, 12
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Conclusions
๏ Discovered the TC Higgs?
๏ New phase diagrams
๏ Walking & jumping
๏ 125 Higgs via a heavy TC Higgs!
๏ Minimal TC & LHC signatures
๏ New era for strong dynamicsLots of fun ahead !
Thursday, December 6, 12