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Measurement of CP asymmetries in two-body B (s)0 -meson decays to charged pions and kaons Alfonso Albero, Alejandro Calvo Gómez, Míriam Camboni, Alessandro Coquereau, Samuel Garrido Beltrán, Lluís Gascón Fora, David Graciani Díaz, Ricardo Graugés Pous, Eugeni Marin Benito, Carla LHCb Collaboration Hadrons Gran Col·lisionador d'Hadrons Física de partícules Experiments Hadrons Large Hadron Collider (France and Switzerland) Particle physics Experiments CP asymmetries have been measured recently by the LHCb collaboration in three-body B+ decays to final states involving charged pions and kaons. Large asymmetries with opposite signs at a level of about 60% have been observed in B± → π ±(or K±)π +π − and B± → π ±K+K− for restricted regions in the Dalitz plots involving π +π − and K+K− with low invariant mass. U-spin is shown to predict corresponding ∆S = 0 and ∆S = 1 asymmetries with opposite signs and inversely proportional to their branching ratios, in analogy with a successful relation predicted thirteen years ago between asymmetries in Bs → K−π + and B0 → K+π −. We compare these predictions with the measured integrated asymmetries. Effects of specific resonant or non-resonant partial waves on enhanced asymmetries for low-pair-mass regions of the Dalitz plot are studied in B± → π ±π +π −. The closure of low-mass π +π − and K+K− channels involving only ππ ↔ KK¯ rescattering may explain by CPT approximately equal magnitudes and opposite signs measured in B± → π ±π +π − and B± → π ±K+K−. 2022-05-04T16:20:19Z 2022-05-04T16:20:19Z 2018 2022-05-04T16:20:19Z info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2470-0010 https://hdl.handle.net/2445/185372 684600 eng Reproducció del document publicat a: https://doi.org/10.1103/PhysRevD.98.032004 Physical Review D, 2018, vol. 98, num. 3, p. 1-15 https://doi.org/10.1103/PhysRevD.98.032004 (c) American Physical Society, 2018 info:eu-repo/semantics/openAccess 15 p. application/pdf American Physical Society Articles publicats en revistes (Física Quàntica i Astrofísica)