Speaker
Ms
Alba Reyes Torrecilla
(Departamento de Física Teórica and IPARCOS, Universidad Complutense de Madrid)
Description
We utilize the universality of pion--pion ($\pi\pi$) final-state interactions at small invariant masses to understand the enhanced local CP violation in $B^\pm\to K^\pm\pi^+\pi^-$, using a dispersive approach. From a fit to the integrated CP-asymmetry data, we successfully predict the Dalitz-plot kinematic distribution of the asymmetry in the low-energy $\pi\pi$ region, including the large local CP violation recently observed by LHCb. An essential role is played by the contributions of isospin 2. This formalism, whose parameters have a physical meaning, can be adapted straightforwardly to other systems with CP violation enhanced by final-state interactions.
Author
Ms
Alba Reyes Torrecilla
(Departamento de Física Teórica and IPARCOS, Universidad Complutense de Madrid)
Co-authors
Mr
Bastian Kubis
(Helmholtz-Institut für Strahlen und Kernphysik and Bethe Center for Theoretical Physics, Universität Bonn)
Mr
Christoph Hanhart
(Institute for Advanced Simulation (IAS-4), Forschungszentrum Jülich)
José Ramón Peláez Sagredo
(Departamento de Física Teórica and IPARCOS, Universidad Complutense de Madrid)
Mr
Leon Heuser
(Helmholtz-Institut für Strahlen und Kernphysik and Bethe Center for Theoretical Physics, Universität Bonn)
Ms
Patricia C. Magalhães
(Departamento de Raios Cósmicos e Cronologia, Universidade Estadual de Campinas)
Mr
Thomas Mannel
(Center of Particle Physics, Universität Siegen)