Details

Autor(en) / Beteiligte

• Obraztsov, Vladimir

Titel

Evidence for WZW anomaly in the coherent reaction K+Cu → K+π0Cu

Ist Teil von

• Journal of physics. Conference series, 2023-02, Vol.2446 (1), p.012047

Ort / Verlag

Bristol: IOP Publishing

Erscheinungsjahr

2023

Link zum Volltext

Quelle

EZB Free E-Journals

Beschreibungen/Notizen

• On the statistics of ∼ 8·109 positively charged kaons passing through a thin copper target a coherent production of the K+π0 - pair is studied. Contributions of Coulomb, strong interactions and their interference to the total cross section are determined in the region of K*(892). In the distribution over K+π0 invariant mass, an effect is seen, which can be explained by the interference of the chiral anomaly and the K* (892) amplitudes. From that, the ratio of the measured chiral anomaly amplitude and the theoretical one is obtained: Aexp/Ath = 0.9 ± 0.24 (stat.)±0.3 (syst.).