1. “Hot Topics” from BaBar Vasilii G. Shelkov Lawerence Berkeley National Laboratory BaBar Collaboration

2. “Hot Topics” from BaBar

3. Common Analyses Features event shape variables: all analyses are blinded e+e+ e-e- e+e+ e-e- qq Signal B Other B Source of Bs Variables Approach

4. Energy flow around B-thrust axis B sig -thrust Numerical approach Analytical approach Ln – Legendre polynomial of n th power We found that S/B discriminating power of 9-cone Fisher is identical to using a single polynomial L 2

5. Analyses of decays “tree” is Cabibbo suppressed Interference between “penguins”: enhance: suppress:

6. Large rate for decays approximates a flavor singlet state QCD anomaly, glue coupling to “charming” penguins – c enhanced in loop

7. Event selection for decays selection of resonances: suppress continuum with: extract signal with: PDFs were validated with independent sample of fully reconstructed events Example:

8. Results for measurement

9. Results for measurements

10. Projections for fit m ES EE EE

11. Projections for fit m ES EE EE

12. All results in units of 10 -6

13. Analysis of decays charmless decays of charged Bs are interesting for direct-CP searches and extraction of CKM angle  Motivation use all available PID information(DCH,SVT,DIRC) to separate  s and Ks explicitly veto decays into 2 charged hadrons efficiencies for signal and largest background contributions are calculated as a function of Dalitz plot perform Cut&Count analysis of the entire Dalitz plot Approach

14. Analysis of decays PID cross-feeds in % veto all possible combinations of K and  which end up within mass window of peak veto m(      and m(K + K - ) mass combinations within of peaks Charm Veto

15. Analysis of decays Continuum Suppression signal

16. Analysis of decays Signal Box Grand Side Band Using ARGUS shape of m ES, and 2 nd order polynomial for  E, the background from GSB is propagated into the Signal Box(using multiplicative factor R) Background propagation

17. Dalitz plot for decays GSBSignal Box m 2 (  +  - ) max m 2 (  +  - ) min

18. Dalitz plot for decays GSBSignal Box m 2 (K +  - ) m2(+-)m2(+-) m2(+-)m2(+-)

19. Dalitz plot for decays GSBSignal Box m 2 (K + K - ) m 2 (  + K - )

20. Dalitz plot for decays Signal BoxGSB m 2 (K + K - ) min m 2 (K + K - ) max m 2 (K + K - ) min m 2 (K + K - ) max

21. Results B-bkg EEm ES

22. Results B-bkg EE m ES

23. Results