1. D→Kπππ Decays and a Measurement of the CKM angle  Lauren Martin, University of Oxford 

2. Outline            

3. Importance of Measuring         ‘  ’    

4.  Measurement of    using B ± →DK ±   B ± →D 0 K ±   D 0      ‘  ’     D 0     

5. ‘ADS’ method  ‘  ’  D 0 . K + π −     

6. Four-Body ADS   →     D 0   D 0                       

7. CLEO-c Measurement of R K3π   δ K3π  R K3π     +  - →  →     δ K3π  R K3π     

8. Preliminary Results Kπππ VS CP  R K3π  δ K3π     Kπππ VS Kπππ  R K3π ) 2  R K3π  Kπππ VS Kπ R K3π  δ K3π  δ Kπ  δ Kπ   

9. Impact on LHCb The figure illustrates the impact of the results on the sensitivity to γ at LHCb Sensitivity to γ dependent on δ DKπ, the sensitivty to γ increases by ∼ 2 o due to these measurements

10. Dalitz Analysis        ’            

11. CLEO-c Measurements                    

12. 08/12/07 CP even tagged Flavor Tagged CP odd tagged       D decay Model

13. Summary & Conclusions          