Journal Article

FZJ-2026-02096

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Understanding Large Localized C P Violation in B ± → K ± π + π − Using Dispersive Methods

Heuser, L. A. (Corresponding author) ; Reyes-Torrecilla, A. (Corresponding author) ; Hanhart, C.FZJ* ; Kubis, B. ; Magalhães, P. C. ; Mannel, T. ; Peláez, J. R.

2026
APS College Park, Md.

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Please use a persistent id in citations: doi:10.1103/l4rs-4znv  doi:10.34734/FZJ-2026-02096

Abstract: We utilize the universality of pion-pion (𝜋⁢𝜋) final-state interactions at small invariant masses to understand the enhanced localized 𝐶⁢𝑃 violation in 𝐵± →𝐾±⁢𝜋+⁢𝜋− , using a dispersive approach. From a fit to the integrated 𝐶⁢𝑃 -asymmetry data, we successfully predict the Dalitz-plot Kinematic distribution of the asymmetry in the low-energy 𝜋⁢𝜋 region, including the large localized 𝐶⁢𝑃 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 𝐶⁢𝑃 violation enhanced by final-state interactions

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Contributing Institute(s):

1. Theorie der Starken Wechselwirkung (IAS-4)

Research Program(s):

1. 5111 - Domain-Specific Simulation & Data Life Cycle Labs (SDLs) and Research Groups (POF4-511) (POF4-511)
2. DFG project G:(GEPRIS)533766364 - EXC 3107: Color meets Flavor - Suche nach neuen Phänomenen in der starken und schwachen Wechselwirkung (533766364) (533766364)

Appears in the scientific report 2026

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Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Electronics and Telecommunications Collection ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; Essential Science Indicators ; IF >= 5 ; JCR ; Nationallizenz ; SCOAP3 sponsored Journal ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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