Evidence for the suppressed decay B- -˃ DK-, D -˃ K+ pi(-)pi(0)
- Title
- Evidence for the suppressed decay B- -˃ DK-, D -˃ K+ pi(-)pi(0)
- Author
- 천병구
- Keywords
- CP-VIOLATION; BELLE
- Issue Date
- 2013-11
- Publisher
- Amer Physical SOC
- Citation
- Physical Review D, 2013, 88(9), 091104
- Abstract
- We report a study of the suppressed decay B- -> DK-, D -> K+ pi(-) pi(0), where D denotes either a D-0 or a (D) over bar (0) meson. The decay is sensitive to the CP-violating parameter phi(3). Using a data sample of 772 x 10(6) B (B) over bar pairs collected at the Upsilon(4S) resonance with the Belle detector, we measure the ratio of branching fractions of the above suppressed decay to the favored decay B- -> DK-, D -> K- pi(+) pi(0). Our result is R-DK = [1.98 +/- 0.62 (stat) +/- 0.24 (syst)] x 10(-2), which indicates the first evidence of the signal for this suppressed decay with a significance of 3.2 standard deviations. We measure the direct CP asymmetry between the suppressed B- and B+ decays to be A(DK) = 0.41 +/- 0.30(stat) +/- 0.05(syst). We also report measurements for the analogous quantities R-D pi and A(D pi) for the decay B- -> D pi(-), D -> K+ pi(-)pi(0).
- URI
- https://journals.aps.org/prd/abstract/10.1103/PhysRevD.88.091104http://hdl.handle.net/20.500.11754/55552
- ISSN
- 1550-7998; 1550-2368
- DOI
- 10.1103/PhysRevD.88.091104
- Appears in Collections:
- COLLEGE OF NATURAL SCIENCES[S](자연과학대학) > PHYSICS(물리학과) > Articles
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