2017/08/31 by Rebecca Klein, Thomas Mannel, Javier Virto +1 · 1 citation
Physics and Astronomy · #CP violation #Dalitz plot #Factorization #Invariant (physics) #Neutrino Physics Research #Particle physics theoretical and experimental studies #Physics beyond the Standard Model #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Simple (philosophy) #Standard Model (mathematical formulation) #hep-ex #hep-ph
paper · pdf · doi:10.1007/jhep10(2017)117
published as JHEP 10, 117 (2017) · 17 pages, 6 figures, added references
openalex created_date 2017/08/17 · openalex publication_date 2017/10/01 · arxiv created 2017/10/20 · arxiv updated 2017/10/23 · openalex updated_date 2026/08/06
We test a data-driven approach based on QCD factorization for charmless three-body B-decays by confronting it to measurements of CP violation in B − → π − π + π −. While some of the needed non-perturbative objects can be directly extracted from data, some others can, so far, only be modelled. Although this approach is currently model dependent, we comment on the perspectives to reduce this model dependence. While our model naturally accommodates the gross features of the Dalitz distribution, it cannot quantitatively explain the details seen in the current experimental data on local CP asymmetries. We comment on possible refinements of our simple model and conclude by briefly discussing a possible extension of the model to large invariant masses, where large local CP asymmetries have been measured.