Observation of D+ -˃ K+eta(()'()) and Search for CP Violation in D+ -˃ pi(+)eta(()'()) Decays
- Title
- Observation of D+ -˃ K+eta(()'()) and Search for CP Violation in D+ -˃ pi(+)eta(()'()) Decays
- Author
- 천병구
- Keywords
- BELLE
- Issue Date
- 2011-11
- Publisher
- AMER Physical SOC
- Citation
- Physical Review Letters, NOV 21 2011, 107 22
- Abstract
- We report the first observation of the doubly Cabibbo-suppressed decays D+ -> K+eta(()'()) using a 791 fb(-1) data sample collected with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. The ratio of the branching fractions of doubly Cabibbo-suppressed relative to singly Cabibbo-suppressed D+ -> pi(+)eta(()'()) decays are B(D+ -> K+eta) / B(D+ -> pi(+)eta) =(3.06 +/- 0.43 +/- 0.14)% and B(D+ -> K+eta')/B(D+->pi(+)eta') = (3.77 +/- 0.39 +/- 0.10)%. From these, we find that the relative final-state phase difference between the tree and annihilation amplitudes in D+ decays, delta(TA), is (72 +/- 9)degrees or (288 +/- 9)degrees. We also report the most precise measurements of CP asymmetries to date: A(CP)(D+->pi+eta) = (+1.74 +/- 1.13 +/- 0.19)% and A(CP)(D+->pi+eta') = (-0.12 +/- 1.12 +/- 0.17)%.
- URI
- http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.107.221801
- ISSN
- 0031-9007
- Appears in Collections:
- COLLEGE OF NATURAL SCIENCES[S](자연과학대학) > PHYSICS(물리학과) > Articles
- Files in This Item:
- Observation of D+ -˃ K+eta(()'()) and Search for CP Violation in D+ -˃ pi(+)eta(()'()) Decays.pdfDownload
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