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Thoughts and Directions. on. the Fourth Generation. October 23, 2011, 3-B3GSM @ BOUN. diaz site !!! at http://flickr.com/photos/7339233@N05/ 1843725867. Outline. I. Intro: - PowerPoint PPT Presentation
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4G Dervish George W.S. Hou (NTU) 3-B3GSM@BOUN, 10/23/2011 1
the Fourth Generation
Thoughts and Directions
October 23, 2011, 3-B3GSM @ BOUN
on
diaz site !!! at http://flickr.com/photos/7339233@N05/ 1843725867
4G Dervish George W.S. Hou (NTU) 3-B3GSM@BOUN, 10/23/2011 2
I. Intro: Capri’08; 1st BSM3 & 4 Statements; 2nd BSM3; Summer’11
II. From Hints to Measurements: Indirect/Direct Bs → J/ / Bs → / B → K*║ mt ; BR(t → b W*)
III. Enhancing Small Numbers nEDM4; BAU4
IV. Breaking the Unitarity “Bound” Yukawa-bound Ultra Heavy “Mesons” — Relativ. Bound State Issues; Lattice; [“Bootstrap” Gap Equation
V. Conclusion
Outline
CPV George W.S. Hou (NTU) NCU, Oct 6, 2009 3
I. Intro
arXiv:0805.4393 [hep-ph]
4G Dervish George W.S. Hou (NTU) 3-B3GSM@BOUN, 10/23/2011 4
~ 133 citations ~ 133 citations today
4G Dervish George W.S. Hou (NTU) 3-B3GSM@BOUN, 10/23/2011 5
http://indico.cern.ch/conferenceDisplay.py?confId=68036
Summarized this morning.
Fourth Generation George W.S. Hou (NTU) TOP2010, Bruges, 100603 6
sin2Bs ~ 0.5 - 0.7
WSH, Nagashima, Soddu, PRD’07 (already in 05)
sin2Bs ~ 0.33
WSH, Ma, arXiv:1004.2186 [hep-ph]
4th generation “prediction” still robust, but needs LHCb to verify.
Also, Soni et al., arXiv:1002.0595 [hep-ph] Buras et al. arXiv:1002.2126 [hep-ph] Lenz et al., arXiv:1005.3505 [hep-ph]
curios 1.2 too
sin2Bs ≡ sin s
≡ sin2 s
Sum 2-B3GSM George W.S. Hou (NTU) 3-B3GSM@BOUN, 10/23/2011 7
Gerhard RavenB Physics Results from the LHC
Practically All Flavor/CPV Hints are “Gone” !!
Practically All Flavor/CPV Hints are “Gone” !!
LP11
4G Dervish George W.S. Hou (NTU) 3-B3GSM@BOUN, 10/23/2011 8
II. From Hints to Measurements: Indirect/Direct
Measuring CKM4 Solely @ LHC
t, t ’
t, t ’
btst VV
btst VV
,t ’
sbisb er
btst VV
btV
4G Dervish George W.S. Hou (NTU) 3-B3GSM@BOUN, 10/23/2011 9
Andrei Golutvin @
s[sins ~ 0.74]
Andrei: Do you like the 1 fb number I gave, George?
George: Well, perhaps 0.3 0.1 better
4G Dervish George W.S. Hou (NTU) 3-B3GSM@BOUN, 10/23/2011 10
7.0 2.4 x 109
reachable w/ 1 fb ?
CERN RRB April 2011
Add ATLAS/CMS !
4G Dervish George W.S. Hou (NTU) 3-B3GSM@BOUN, 10/23/2011 11
Gerhard RavenB Physics Results from the LHC
LP11
Getting Interesting: 4G could enhance
Getting Interesting: 4G could enhance BBss → → by ~ 2 ! by ~ 2 !
4G Dervish George W.S. Hou (NTU) 3-B3GSM@BOUN, 10/23/2011 12
Gerhard RavenB Physics Results from the LHC
LP11
I was devasted by this, and mildly depressed in September …
I was devasted by this, and mildly depressed in September …
4G Dervish George W.S. Hou (NTU) 3-B3GSM@BOUN, 10/23/2011 13
Measuring CKM4 Solely @ LHC
t, t ’
t, t ’
,t ’
btst VV
btst VV
btst VV
Bs
==
SM3
Trick: Take Ratio of
Bs → and ms
Remove dependence,
only left.
SM3
4G Dervish George W.S. Hou (NTU) 3-B3GSM@BOUN, 10/23/2011 14
Measuring CKM4 Solely @ LHC
t, t ’
t, t ’
,t ’
btst VV
btst VV
btst VV
Bs
Could by smaller than SM3
Anticipating 2012
“2” SM3-like
4G Dervish George W.S. Hou (NTU) 3-B3GSM@BOUN, 10/23/2011 15
sbier
sbbtst VV
Measurement
Anticipating 2012
“2” SM3-like
Smaller than SM3
Intersect at ~ SM3 value
4G Dervish George W.S. Hou (NTU) 3-B3GSM@BOUN, 10/23/2011 16
sbier
sbbtst VV
Measurement
A Third Measureable: AFB
~ SM3 !Contours of
x
Sample points: blue; purple;
red; green.
x
Allowed
008.0 |VV| btst for mt’ = 550 GeV
4G Dervish George W.S. Hou (NTU) 3-B3GSM@BOUN, 10/23/2011 17
sbier
sbbtst VV
Measurement
Sample points: blue; purple;
red; green.
Allowed
for mt’ = 550 GeV008.0 |VV| btst
The refined measurements of
˙ sin2Bs
˙ B (Bs → ) ˙ A FB (B0 → K *0)
together with mt’, will pinpoint
the value of
btst VV
Take red point to illustrate the
MeaningMeaning.
4G Dervish George W.S. Hou (NTU) 3-B3GSM@BOUN, 10/23/2011 18
btst VV
tbtsVV
cbcsVV
cbcdVV-
ubudVV
ubusVV
OS
b b →→ s s
b →→ d
SM |VV tbts
70 0.0065 ieer sbiVV
sbbtst
t, t ’
t, t ’
btst VV
btst VV
,t ’
Belle/BaBar Measurement KM Nobel
Measurement of
Determine (knowing t ’ mass) ~ Triangle Relevant for BAU?
4G Dervish George W.S. Hou (NTU) 3-B3GSM@BOUN, 10/23/2011 19
but TCPV hint is now diminished …
t, b
phase space suppressed
vs
CKM suppressed
BR(b → t W*)determines bt V
so then
bt
V
Y. Chao et al., PRD 11
virtual
Threshold enhanceddetermination of CKM4
4G Dervish George W.S. Hou (NTU) 3-B3GSM@BOUN, 10/23/2011 20
III. Enhancing Small Numbers
nEDM4 and BAU4
4G Dervish George W.S. Hou (NTU) 3-B3GSM@BOUN, 10/23/2011 21
21
New neutron EDM expts underway …
» for BAU «
nEDM4
Borderline even if hadronic enhanced by 103
4G Dervish George W.S. Hou (NTU) 3-B3GSM@BOUN, 10/23/2011 22
Pospelov & Ritz, PRD’01
Hamzaoui & Pospelov, PLB’95
Hamzaoui & Pospelov, PRD’96
Hou & Ma, PRD’10
nEDM4 ~ 1031 e cm
effective 3-loop estimate, picking out large momenta in loop
w/ Fanrong Xu & Junji Hisanp, to appear PRD 11
nEDM is a slow (safe) track for 4G
nEDM4 estimate
4G Dervish George W.S. Hou (NTU) 3-B3GSM@BOUN, 10/23/2011 23
BAU4 estimate
• Farrar & Shaposhnikov claimed, in 1993, that SM3 could generate BAU by CP violating scattering of quasi-particles (thermal excitations of q & anti-q) with bubbles of the Higgs condensate
• This was shot down by Gavela, Hernández, Orloff and Pène in 1994, who pointed out FS neglected the damping length in the plasma (mainly QCD)
• Huet & Sather gave in PRD’95 a lucid account, finding conservatively
• We find, following the steps of HS,
bu
bb
le w
all
Problem: Large Yukawa coupling. w/ Masaya Kohda & Yoshio Kikukawa (prelim.)
seem sufficient !
Too small !
4G Dervish George W.S. Hou (NTU) 3-B3GSM@BOUN, 10/23/2011 24
IV. Breaking the Unitarity “Bound”
Yukawa-bound Ultra-heavy Mesons; pheno?Lattice future
4G Dervish George W.S. Hou (NTU) 3-B3GSM@BOUN, 10/23/2011 25
LP11
b' Search @ LHCb' Search @ LHC
same sign dileptons
Pa
rtia
l W
av
e
Pa
rtia
l W
av
e U
nit
ari
ty B
ou
nd
Un
ita
rity
Bo
un
d
b'b' ( (→→ W Wt)t) b'b'
_
Will cross UB w/ 2011-2012 data Non
per
turb
a
Non
per
turb
ative
tive
PLB 11
4G Dervish George W.S. Hou (NTU) 3-B3GSM@BOUN, 10/23/2011 26
Bethe-Salpeter approach to new Heavy IsospinHeavy Isospin
Jain et al., PRD 92; 94 semi-degenerate
cov.
± ± +
+
Isosinglet 1 lightest
↬↬ CollapseCollapse for large mlarge mQQ su
btra
ct s
-cha
nnel
becomes most attractive!
but s-channel is repulsive !Ishiwata & Wise, PRD 11 relativistic correction study
breaks down ?
4G Dervish George W.S. Hou (NTU) 3-B3GSM@BOUN, 10/23/2011 27
Ishiwata and Wise, PRD 11
Fourth generation bound statesrelativistic expansion study
breaks down ?My interpretation:• QCD-bound for GeV scale binding energy• Sudden turn-on of Large Yukawa Coupling ⇒ Sudden drop in radius jump in binding energy• Rel. Expan. fails just when it turns interesting.
accidental degeneracy
less bound
4G Dervish George W.S. Hou (NTU) 3-B3GSM@BOUN, 10/23/2011 28
Bethe-Salpeter approach to new Heavy IsospinHeavy Isospin
Jain et al., PRD 92; 94 semi-degenerate
cov.
± ± +
+
Isosinglet 1 lightest
↬↬ CollapseCollapse for large mlarge mQQ su
btra
ct s
-cha
nnel
becomes most attractive!
but s-channel is repulsive !Ishiwata & Wise, PRD 11 relativistic correction study
breaks down ?
4G Dervish George W.S. Hou (NTU) 3-B3GSM@BOUN, 10/23/2011 29
: “usual”
:
Goes down fast w/ mQ
• Tight, Relativistic Bound State (large q!)
• “Negative Energy Potential” Matters!
• What does collapse mean? What about s-channel subtr.?Enkhbat, WSH, Yokoya, to appear PRD deep boundstate production/decay …
vani
sh fo
r ze
ro r
el. m
otio
n
Yukawa / 5
4G Dervish George W.S. Hou (NTU) 3-B3GSM@BOUN, 10/23/2011 30
no gg production
mQ = 500 – 700 GeV; binding to 0 GeV
1 to 1.4 TeV
4G Dervish George W.S. Hou (NTU) 3-B3GSM@BOUN, 10/23/2011 31
Decay
narrow
4G Dervish George W.S. Hou (NTU) 3-B3GSM@BOUN, 10/23/2011 32
Results
dijet
4G Dervish George W.S. Hou (NTU) 3-B3GSM@BOUN, 10/23/2011 33
from the Abstract
Enkhbat, WSH, Yokoya, to appear PRD
4G Dervish George W.S. Hou (NTU) 3-B3GSM@BOUN, 10/23/2011 34
Lattice: only known nonpert. approach
Last name: LinFirst name: C.-J. DavidAffiliation: National Chiao-Tung UniversityEmail address: [email protected]: Study of the Higgs-Yukawa Theory at the Strong-Yukawa RegimeAuthors: John Bulava, Philipp Gerhold, George W.-S. Hou, Karl Jansen, C.-J. David Lin, Kei-Ichi Nagai, Attila Nagy, Kenji Ogawa, Brian SmigielskiType: ParallelSession: Applications beyond QCDAbstract: We present an on-going project on the Higgs-Yukawa theory in theregime of large bare Yukawa coupling. We use the overlap fermion andthe pHMC algorithm in this work. Our preliminary study shows that there exists a symmetric phase (vanishing scalar vacuum expectation value) in this regime. We also comment on the investigation of the spectrum.
talk at Lattice 2011
Remote Talk tomorrow
4G Dervish George W.S. Hou (NTU) 3-B3GSM@BOUN, 10/23/2011 35
V. Conclusion
• Measure CKM relevant (?) for BAU at LHC [measure also
• nEDM4 safe; BAU4 “possible”
• Unitarity BoundUnitarity Bound approached with 2011-2012 LHC Data
• Need Lattice Study/Understanding to Go Beyond
BR(t → b W*)
Ultra Relativistic, Strong/Nonpert. BoundStates !?
Transition ~ Moriond / Summer Conf. 2013
We await the light SM Higgs verdict