New NA48 Results on Kaon and Hyperon Decays
R. Wanke
TL;DR
This paper presents new precise measurements of hyperon decay parameters and novel observations in kaon decay interference effects, advancing understanding of weak decay processes in strange particles.
Contribution
The study provides the first observation of interference in K+- -> pi+- pi0 gamma decays and new precise measurements of hyperon decay asymmetries and lifetimes.
Findings
First observation of interference between Inner Bremsstrahlung and Direct Emission in kaon decays.
Precise measurements of Xi0 hyperon lifetime and decay asymmetries.
Accurate determination of form factor slopes in semileptonic kaon decays.
Abstract
The NA48 Collaboration has obtained several new results on kaon and neutral hyperon decays. For hyperons we present new, very precise measurements on the Xi0 lifetime and the decay asymmetries of Xi0 -> Lamda gamma and Xi0 -> Sigma0 gamma. On kaon decays, we report on the first observation of the interference term between Inner Bremsstrahlung and Direct Emission in K+- -> pi+- pi0 gamma and on a new, accurate measurement of the form factor slopes in the semileptonic decay KL -> pi+- mu-+ nu.
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Taxonomy
TopicsParticle physics theoretical and experimental studies · Quantum Chromodynamics and Particle Interactions · Atomic and Subatomic Physics Research