Observation of the suppressed ADS modes B± →[π±K∓π+π-] D K± and B± →[π±K∓π+π-] Dπ±
- R. Aaij,
- C. Abellan Beteta,
- B. Adeva,
- M. Adinol,
- C. Adrover,
- A. Affolder
- National Institute for Subatomic Physics,
- Ramon Llull University,
- University of Barcelona,
- University of Santiago de Compostela,
- University of Bristol,
- CNRS
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Abstract
An analysis of B ± → DK ± and B ± → Dπ ± decays is presented where the D meson is reconstructed in the four -body nal state K ±π ∓π +π-. Using LHCb data corresponding to an integrated luminosity of 1.0 fb -1, rst observations are made of the suppressed ADS modes B ± →[π ±K ∓π +π-] D K ± and B ± → [π ±K ∓π +π-]Dπ ± with a signicance of 5.1σ and greater than 10σ, respectively. Measurements of CP asymmetries and CP -conserving ratios of partial widths from this family of decays are also performed. The magnitude of the ratio between the suppressed and favoured B ± → DK ± amplitudes is determined to be r K B = 0.097±0.011.
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Original language
EnglishPages from-to (Number of pages)
Pages 44-53 (10 pages)Journal (Volume, Issue Number)
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics (Volume 723, Issue 1-3)Publication milestones
- Published - 10/06/2013
Publication status
ISSN
0370-2693Publication IDs
- Scopus: 84890789619
- WOS: 000320206500005