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Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/162051
Amplitude analysis of B± → π±K+K− decays
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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 sizeable 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.
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LHCb Collaboration, CALVO GÓMEZ, Míriam, CAMBONI, Alessandro, COQUEREAU, Samuel, GARRIDO BELTRÁN, Lluís, GASCÓN FORA, David, GIRONELLA GIRONELL, Pere, GRACIANI DÍAZ, Ricardo, GRAUGÉS POUS, Eugeni, VILASIS-CARDONA, Xavier, MARIN BENITO, Carla. Amplitude analysis of B± → π±K+K− decays. _Physical Review Letters_. 2019. Vol. 123, núm. 231802. [consulta: 8 de gener de 2026]. ISSN: 0031-9007. [Disponible a: https://hdl.handle.net/2445/162051]