K* resonance effects on direct CP violation in B→ππK
Abstract
B±→π+π-K± and B¯0→π+π-K¯0 decay channels are analyzed within the QCD factorization scheme where final state interactions before and after hadronization are included. The K*(892) and K0*(1430) resonance effects are taken into account using the presently known πK strange vector and scalar form factors. The weak decay amplitudes, which are calculated at leading power in ΛQCD/mb and at the next-to-leading order in the strong coupling constant, include the hard-scattering and annihilation contributions. The end-point divergences of these weak final state interactions are controlled by two complex parameters determined through a fit to the available effective mass and helicity angle distribution, CP asymmetry, and K*(892) branching ratio data. The predicted K0*(1430) branching ratios and the calculated direct CP violation asymmetries are compared to the Belle and BABAR Collaboration data.
- Publication:
-
Physical Review D
- Pub Date:
- May 2010
- DOI:
- 10.1103/PhysRevD.81.094033
- arXiv:
- arXiv:1001.5403
- Bibcode:
- 2010PhRvD..81i4033L
- Keywords:
-
- 13.25.Hw;
- 11.30.Er;
- Decays of bottom mesons;
- Charge conjugation parity time reversal and other discrete symmetries;
- High Energy Physics - Phenomenology;
- High Energy Physics - Experiment
- E-Print:
- Comments: 22 pages, 2 figures and 3 tables. In this new version, the results are unchanged, but, the last paragraph of the Section "RESULTS AND SUMMARY" (now called "RESULTS AND DISCUSSION") has been replaced by a new Section "SUMMARY AND OUTLOOK". To appear in Physical Review D