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Title

Amplitude Analysis of B^{±}→π^{±}K^{+}K^{-} Decays

AuthorsGarcía Martín, L.M.; Henry, L.; Jashal, B.; Martínez-Vidal, Fernando CSIC ORCID; Oyanguren, Arantza CSIC ORCID; Remón Alepuz, Clara; Ruiz Vidal, Joan; Sánchez Mayordomo, Carlos CSIC; LHCb Collaboration
Issue DateDec-2019
PublisherAmerican Physical Society
CitationPhysical Review Letters 123 (23): 231802 (2019)
AbstractThe 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)^{0}π^{±} 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.
Publisher version (URL)http://dx.doi.org/10.1103/PhysRevLett.123.231802
URIhttp://hdl.handle.net/10261/204876
DOI10.1103/PhysRevLett.123.231802
Identifiersdoi: 10.1103/PhysRevLett.123.231802
issn: 1079-7114
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