1. Belle B->VV, XXXX Recontres de Moriond - Mar. 11
Search for new physics in B to VV decays and other hot topics from Belle
Katsumi Senyo
Nagoya University
Katsumi Senyo, Nagoya Univ.
Belle B->VV, XXXX Recontres de Moriond - Mar. 11

2. Just start with joking…
Japanese bureaucrats think of `What B Factory is’:
It produces pure and quality B mesons made in Japan,
like SONY and Honda do (so they like a lepton machine),
150M BB Mass-product per year, accumulate 380M as of today,
and offers one flavored B meson per 1 € for sale.
Surprise! Japanese high school students already have 1M BB, and have started to search new particles (called b-lab).
Join us before teenagers find something!
Katsumi Senyo, Nagoya Univ.
Belle B->VV, XXXX Recontres de Moriond - Mar. 11

3. Belle B->VV, XXXX Recontres de Moriond - Mar. 11
Today’s topics
~B →VV decays
Submitted to PRL
on Mar.8th, 2005
New!
B→ f K* update with 253 fb-1
(dataset collected by June `04, 274.5×106 BB)
Polarization
Full angular analysis and new physics search
B+→r+K* update with 253 fb-1
Branching Fraction
New! (preliminary)
Katsumi Senyo, Nagoya Univ.
Belle B->VV, XXXX Recontres de Moriond - Mar. 11

4. B decays into two vector mesons
Polarization reveals spin structure in the decay f S S S S S S B A0 A+ A- b d K* S d S d S d
Spin=0
Helicity amplitudes: A0, A+, A-
11 observables(B and B): 6| Ai |, 5 arg(Ai / Aj)
cf. fK±: 2 observables: | Ai |, | Ai |,
fKS: 3 observables: | Ai |, | Ai |, arg(A / A)
A0 requires no spin flip, A+ requires one spin flip A- requires two spin flips.
Katsumi Senyo, Nagoya Univ.
Belle B->VV, XXXX Recontres de Moriond - Mar. 11

5. Polarization in B  V V decay
Angles in transversity basis
Differential cross section looks so complicated, but not, actually.
Physics implication and recent experimental results
are reviewed here.
Katsumi Senyo, Nagoya Univ.
Belle B->VV, XXXX Recontres de Moriond - Mar. 11

6. Polarization in B  V V decay
Factorization, as well as simple quantum mechanics
predicts:
Longitudinal ~ 1
Transverse ~ 0
So, the distribution is expected to be dominated by longitudinal polarization( fL~1 )
Is this true?
Katsumi Senyo, Nagoya Univ.
Belle B->VV, XXXX Recontres de Moriond - Mar. 11

7. Belle B->VV, XXXX Recontres de Moriond - Mar. 11
B  V V tree decay
Diagrams and tables are from presentation of P.J.
Yes, it is true for trees.
fL~1
Katsumi Senyo, Nagoya Univ.
Belle B->VV, XXXX Recontres de Moriond - Mar. 11

8. Polarization puzzle in pure penguin decays: B  f K*±/0 and B  r -K*0
Today
275
Rescattering?
An enhanced New Standard Model Amplitude?
New Physics?
Diagrams and tables are from presentation of P.J.
But, this is not true in B  f K* and r-K*0!!
fL deviates from 1 in both Belle and BaBar.
Katsumi Senyo, Nagoya Univ.
Belle B->VV, XXXX Recontres de Moriond - Mar. 11

9. Belle B->VV, XXXX Recontres de Moriond - Mar. 11
New physics in B  f K*±/0
Further, extracting the triple-products asymmetry w/ B flight direction and two meson polarizations (T-odd CP Violation search)
Experimentally, the following observables are sensitive to new physics:
subscript i is one of {0, //}.
(polarization)
non-0 possible
w/ FSI
D. London, N.Sinha and R. Sinha(2004)
Katsumi Senyo, Nagoya Univ.
Belle B->VV, XXXX Recontres de Moriond - Mar. 11

10. Analysis results for B  f K*±/0
What we look at here:
Confirm fL ≠1 in b  s pure penguin decay
Perform a fully angular analysis
Submitted to PRL, hep-ex/
Katsumi Senyo, Nagoya Univ.
Belle B->VV, XXXX Recontres de Moriond - Mar. 11

11. B  f K*±/0: signal extraction
253fb-1
Mass cuts
PID
Event topology
Yields:
B  f K*0: 173±16 events
B  f K*± : events
-11
BG: qq continuum
K+K-K*, f0K*(a few %)
No updated Branching Fraction results.
Direct CP Violation ~ 0
Katsumi Senyo, Nagoya Univ.
Belle B->VV, XXXX Recontres de Moriond - Mar. 11

12. B  f K*±/0: angular analysis
Submitted to PRL
Fully angular analysis is performed.
10.2s (B  f K*0) and 5.6s (B  f K*±) deviations from 1 in fL
Katsumi Senyo, Nagoya Univ.
Belle B->VV, XXXX Recontres de Moriond - Mar. 11

13. B  f K*±/0: angular analysis
DCPV~ 0
B  f K*0:
SM-consistent
Katsumi Senyo, Nagoya Univ.
Belle B->VV, XXXX Recontres de Moriond - Mar. 11

14. B  f K*0: new physics search
VV puzzle
(if fL<<1)
0.45±0.05±0.02
0.24±0.06±0.02
0.31±0.06±0.01
Can be non-0
(FSI in SM)
±0.04
+0.16
-0.14
-0.06±0.10±0.01
-0.06±0.10±0.01
-0.06±0.05±0.01
NP if non-0
-0.01±0.06±0.01
0.06±0.05±0.01
±0.03
+0.16
-0.14
0.01±0.10±0.02
-0.11±0.11±0.02
Submitted to PRL
Katsumi Senyo, Nagoya Univ.
Belle B->VV, XXXX Recontres de Moriond - Mar. 11

15. Analysis results for B  r±K*0
~Another b  s pure penguin decay
What we look at here:
Measure fL and see whether it deviates from 1
Branching fraction measurement
Preliminary results
Katsumi Senyo, Nagoya Univ.
Belle B->VV, XXXX Recontres de Moriond - Mar. 11

16. Belle B->VV, XXXX Recontres de Moriond - Mar. 11
B+  r+K*0: DE-Mbc plots
253 fb-1
B+  p+p-p0K+
b →c tran.
qq continuum
Nsig = ± (B+  p+p-p0K+ before non resonant component subtraction)
Katsumi Senyo, Nagoya Univ.
Belle B->VV, XXXX Recontres de Moriond - Mar. 11

17. B+  r+K*0: M(pp0) / M(Kp) fit ~ non-resonant subtraction
S=5.3s
r: 125.4±15.8 evts
Non res.:-0.3±3.0 evts
K*: 85.4±16.1 evts
Non res.:28.8±4.1 evts
Fit with P-wave Breit-Wigner(+ det.res.) for signal, phase-space for non-res.
Katsumi Senyo, Nagoya Univ.
Belle B->VV, XXXX Recontres de Moriond - Mar. 11

18. B+  r+K*0: Polarization result
cosqhelr+
cosqhelK*0 A0 A± BG
systematics
fL=0.43±0.11(stat.) (syst.)
-0.02
Preliminary results
Systematic error from ArKp interference is ~ 0.5%
Katsumi Senyo, Nagoya Univ.
Belle B->VV, XXXX Recontres de Moriond - Mar. 11

19. B+  r+K*0: Branching Fraction
BF( B+  r+K*0)
=(8.9±1.7(stat.) ±1.0(syst.))×10-6
Preliminary results
Systematic uncertainties
Measured fL is used to determine the BF.
Katsumi Senyo, Nagoya Univ.
Belle B->VV, XXXX Recontres de Moriond - Mar. 11

20. Belle B->VV, XXXX Recontres de Moriond - Mar. 11
Summary
VV polarization puzzle in b  s penguin decays (f K*/r-K*) confirmed, fL deviates from 1 for both modes. A fully angular analysis and triple-product correlation investigated for B  f K*
Experimental results provide stimulus to theoretical models of B decay
Katsumi Senyo, Nagoya Univ.
Belle B->VV, XXXX Recontres de Moriond - Mar. 11

21. New physics in B  f K*±/0 (backup)
All suggested variables by D. London, N. Sinha and R. Sinha(2004).
r param. needs time-dependent analysis, though we have not done yet.
Katsumi Senyo, Nagoya Univ.
Belle B->VV, XXXX Recontres de Moriond - Mar. 11

22. B  f K*±/0 : details (backup)
Not really. See hep-ex/
Katsumi Senyo, Nagoya Univ.
Belle B->VV, XXXX Recontres de Moriond - Mar. 11

23. B+  r+K*0: details (backup)
Katsumi Senyo, Nagoya Univ.
Belle B->VV, XXXX Recontres de Moriond - Mar. 11

24. B+  r+K*0: details (backup)
Katsumi Senyo, Nagoya Univ.
Belle B->VV, XXXX Recontres de Moriond - Mar. 11

25. B+  r+K*0: details (backup)
Katsumi Senyo, Nagoya Univ.
Belle B->VV, XXXX Recontres de Moriond - Mar. 11

26. B+  r+K*0: details (backup)
Katsumi Senyo, Nagoya Univ.
Belle B->VV, XXXX Recontres de Moriond - Mar. 11

27. B+  r+K*0: details (backup)
Katsumi Senyo, Nagoya Univ.
Belle B->VV, XXXX Recontres de Moriond - Mar. 11

28. B+  r+K*0: details (backup)
Katsumi Senyo, Nagoya Univ.
Belle B->VV, XXXX Recontres de Moriond - Mar. 11

29. B+  r+K*0: details (backup)
Katsumi Senyo, Nagoya Univ.
Belle B->VV, XXXX Recontres de Moriond - Mar. 11

30. B+  r+K*0: details (backup)
Katsumi Senyo, Nagoya Univ.
Belle B->VV, XXXX Recontres de Moriond - Mar. 11

31. B+  r+K*0: details (backup)
0.5
Katsumi Senyo, Nagoya Univ.
Belle B->VV, XXXX Recontres de Moriond - Mar. 11