Flavor and Physics beyond the Standard Model. Yasuhiro Okada (KEK) June 21, 2007 “SUSY in 2010’s” Hokkaido Univ. . Flavor physics in LHC era. LHC will start to explore TeV physics. TeV = the scale of the electroweak symmetry breaking.
Yasuhiro Okada (KEK)
June 21, 2007
“SUSY in 2010’s” Hokkaido Univ.
TeV = the scale of the electroweak symmetry breaking.
New physics is most probably related to the electroweak symmetry breaking physics. It could involve new symmetries, new forces, or new dimensions. Ex. SUSY, Little Higgs, extra-dim models, etc.
Unless we know what is the Higgs field, we do not know how to write the
Discoveries may not come in the logical order. “Mystery” ex. CPV in kaon.
Neutrino mass, Baryon number of the universe, Dark matter.
SUSY, Extra dimensions
Super KEKB LoI hep-ex/0406071
SLAC Super B workshop proceedings: hep-ph/0503261
Bd mixing and CP asymmetries
Bs mixing and CP asymmetries
eK and B(K->pnn)Is this enough?
Fit from tree level processes
Not, to study New Physics effects.
In order to disentangle new physics
effects, we should first determine CKM
parameters by “tree-level” processes.
We know (or constrain) which sector is affected by new physics.
Improvement of f3/g is essential.
|Vub| from e+e-B factories
f3/g from e+e- B factories and LHCb
The phase of the Bs-Bs amplitude from Bs->J/yf CP asymmetry at LHCb.
Improvements on rear decay observables:
CP asymmetry in B->f Ks, etc.
Direct and mixing-induced CP asymmetry in B->Xs g
Forward-backward asymmetry in b->sll
Roughly speaking, current data only constrain several 10’s%
new physics effects.
(mSUGRA, AMSB, GMSB,
Flavor symmetry, etc.)
(SUSY GUT, neutrino Yukawa couplings etc.)
SUSY breaking terms at the Mw scale
(squark, slepton, chargino, neutralino, gluino masses)
breaking mechanism and interactions at the GUT scale.
Diagonal : LHC/LC
Off-diagonal: Future Flavor exp.
Top quark: Tevatron
KM phase: B factories
SUSY GUT example => T.Goto’s talk
tTauonic B decay
The Belle and Babar combined result of the B ->tn branching ratio.
This is sensitive to the charged Higgs boson exchange diagram
in 2 Higgs doublet model as well as SUSY models.
New contributions are important for the large tanb case
Charged Higgs exchange contribution
There are four processes sensitive to charged Higgs exchanges.
Although inclusive b->ctn and B->D* tn are measured, B -> Dtn
process is the most useful to constrain the charged Higgs mass
combined with B->tn .
Y.Grossman, H.Haber and Y.Nir 1995
K.A.Assamagan, Y.Coadou, A.Deandrea
HComparison with the charged Higgs boson production at LHC
B->tn: H-b-u coupling
B->Dtn : H-b-c coupling
gb->tH: H-b-t coupling
SUSY loop vertex correction
can break the universality.
K.A.Assamagan, Y.Coadou, A.Deandrea
Even within the MFV frame, there can be sizable difference between the
corrections to the H-b-t vertex and the H-b-c(u) vertex.
Effective tanb= tanb x R-1t,c,u
gb->tH+ ->ttn, approximately
gb->tH+ ->ttb, approximately
H.Itoh and Y.Okada
Test of charged Higgs coupling universality
=> Squark flavor structure.
The ratio gives R-1t.
of a neutral Higgs boson
at LHC and the discovery
region of Bs->mm at
Tevatron and LHC overlap.
5s discovery in
pp->bf0->bmmwith 30 fb -1
C.Kao and Y.Wang
Flat extra dim vs. Curved extra dim
What particles can propagate in the bulk.
=> non-universality of KK graviton/gauge boson couplings
b->sll differential Br
KK graviton exchange can induce
tree-level FCNC coupling.
Differential branching ratio of
P3 : 3rd Legendre polynomial moment
=> pick up (cosq )^3 terms due to
spin2 graviton exchange.
(In both flat and curved extra dim )
(Flat large extra dim case)
S(fKs) vs KK gluon mass
1st KK gluon mass
Different pattern of the deviations from the SM prediction.
Correlation with other physics observables.
SLAC SuperB factory WS Proceedings
SUSY seesaw model (F.Borzumati and A.Masiero 1986)
Triplet Higgs model (E.J.Chun, K.Y.Lee,S.C.Park; N.Kakizaki,Y.Ogura, F.Shima, 2003)
Left-right symmetric model (V.Cirigliano, A.Kurylov, M.J.Ramsey-Musolf, P.Vogel, 2004)
R-parity violating SUSY model (A.de Gouvea,S.Lola,K.Tobe,2001)
Generalized Zee model (K.Hasagawa, C.S.Lim, K.Ogure, 2003)
Neutrino mass from the warped extra dimension (R.Kitano,2000)
Different pattern in the predictions on various mu and tau LFV processes.
In many models of SUSY, off-diagonal
terms of the slepton mass matrixes are induced
from Interaction at GUT /seesaw neutrino scales.
In many cases, LFV processes are dominated by the m->e g amplitude.
Explicit examples => T.Goto’s talk
sSUSY seesaw with a large tan b
R.Kitano,M.Koike,S.Komine, and Y.Okada, 2003
SUSY loop diagrams can generate
a LFV Higgs-boson coupling
for large tan b cases.
(t->3m K.Babu, C.Kolda,2002, t-> mh M.Sher,2002)
The heavy Higgs-boson exchange provides
a new contribution of a scalar type.
We calculated the mu-e conversion, mu > e gamma and, mu->3e
branching ratios in the SUSY seesaw model.
(Universal slepton masses at the GUT scale. Hierarchical neutrino masses.
A large tan b (tan b = 60). The Majorana neutrino mass = 10^14 GeV .)
(Non-SUSY) left-right symmetric model
Higgs fields, (bi-doublet, two triplets)
Low energy (TeV region ) seesaw mechanism for neutrino masses
Example of tau and mu LFV processes
A.Akeroyd, M.Aoki, Y.Okada,2006