Tauonic, Radiative & Electroweak B Decays at Super-B. November 9, 2005 “Flavour in the era of the LHC” workshop @ CERN. Toru Iijima Nagoya University. Based on results and studies by Belle. Letter of Intent for KEK Super B Factory ( KEK Report 2004-4 )
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November 9, 2005
“Flavour in the era of the LHC” workshop @ CERN
Based on results and studies by Belle
Letter of Intent for KEK Super B Factory ( KEK Report 2004-4 )
Physics at Super B Factory ( hep-ex/0406071 )
cf) SLAC-R-709, “The Discovery Potential of a Super B Factory”
Proceedings of the 2003 SLAC Workshops
Search for new origin of
flavor mixing and CPV.
Lepton flavor violation
Figure by Dr.Hayasaka (Nagoya Univ.)
Using O(1010) B and t (~100 x now)
ntTauonic B Decays
Charged Higgs contribution to B decays
~ 9 x 10-5
~ 8 x 10-3
Tauonic decay is the most sensitive !
Decays of interests
BXu l n,
BK n n
Single B meson beam in offline !
Powerful tools for B decays w/ neutrinos
= 4.0 x 105 (purity 0.55)
See K.Ikado’s talk at EPS05
Upper limit calculated by M.L. fit.
tp-nmode has the best S/N ~1.
(BaBar 232M BB, hep-ex/0507069)
tanb/mHImpact to Charged Higgs
90%CL excluded region
95% CL excluded region
at 5ab-1 (if Bobs = BSM)
5s observation possible at 1ab-1
Z.Phys. C67 (1995) 321
r can be determined experimentally
by B semiletonic decays
From Bt n
Effective Hamiltonian for bs
|C7| by BXsg,
Sign of C7, C9, C10 by BXsll
M(H+) > 350 GeV already
in TYPE II 2HDM
M. Iwasaki et al. submitted to PRD, hep-ex/0503044
Theoretical prediction by Ali et al.
C7 = -C7SM
C7SMConstraints on Ci from B(BXsl+l-)
P.Gambino, U.Haisch and M.Misiak PRL 94 061803 (2005)
Donut : 90% CL
l+BK*ll FB Asymmetry
q0(the point w/ AFB=0) is sensitive for New Physics
A9/A7AFB: Belle Summer ‘05
w/negative A7 (SM like)
Sign of A9A10 is negative !
See Hep-ex/0508009 &
A.Ishikawa’s talk at EPS05
1000 pseudo experiments w/ SM input values
dC9 ~ 11%
d q02/q02 ~11%
5% at 50ab-1
Summary by M.Nakao
1st Super-B workshop
gBXsg CP Asymmetry
Vertex recon. Eff.
Possible at e+e- B-factory
S= +0.08 ±0.41 ±0.10
Good tag (0.5<r<1.0)
Present Belle (stat./syst.)
0.41 / 0.10
0.051 / 0.038
T. Goto, Y.Okada, Y.Shimizu,T.Shindou, M.Tanaka
hep-ph/0306093, also in SuperKEKB LoI
Hot topics in the coming years !
Expected precision (5ab-150ab-1);
Expected precision at 5ab-1
Correlation of other ovservables are also useful.
Acpdir(Xsg), AFB(Xsll), Br(tmg), CKM