Amplitude Analysis of B± →π±K+K- Decays

(LHCb Collaboration)

Research output: Contribution to journalArticle

10 Scopus citations

Abstract

The first amplitude analysis of the B±→π±K+K- decay is reported based on a data sample corresponding to an integrated luminosity of 3.0 fb-1 of pp collisions recorded in 2011 and 2012 with the LHCb detector. The data are found to be best described by a coherent sum of five resonant structures plus a nonresonant component and a contribution from ππ↔KK S-wave rescattering. The dominant contributions in the π± K and K+ K- systems are the nonresonant and the B±→ρ(1450)0π± amplitudes, respectively, with fit fractions around 30%. For the rescattering contribution, a sizable fit fraction is observed. This component has the largest CP asymmetry reported to date for a single amplitude of (-66±4±2)%, where the first uncertainty is statistical and the second systematic. No significant CP violation is observed in the other contributions.

Original languageEnglish (US)
Article number231802
JournalPhysical Review Letters
Volume123
Issue number23
DOIs
StatePublished - Dec 6 2019

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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