Please use this identifier to cite or link to this item:
http://hdl.handle.net/2445/162051
Title: | Amplitude analysis of B± → π±K+K− decays |
Author: | 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 |
Keywords: | Col·lisions (Física) Física de partícules Experiments Collisions (Physics) Particle physics Experiments |
Issue Date: | 6-Dec-2019 |
Publisher: | American Physical Society |
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 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. |
Note: | Reproducció del document publicat a: https://doi.org/10.1103/PhysRevLett.123.231802 |
It is part of: | Physical Review Letters, 2019, vol. 123, p. 231802 |
URI: | http://hdl.handle.net/2445/162051 |
Related resource: | https://doi.org/10.1103/PhysRevLett.123.231802 |
ISSN: | 0031-9007 |
Appears in Collections: | Articles publicats en revistes (Institut de Ciències del Cosmos (ICCUB)) Articles publicats en revistes (Física Quàntica i Astrofísica) |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
696330.pdf | 387.13 kB | Adobe PDF | View/Open |
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.