Scalar mesons and delta0-delta2 at KLOE
The KLOE collaboration
TL;DR
This paper discusses KLOE's measurements of phi radiative decays and the ratio of kaon decay widths, aiming to clarify the nature of scalar mesons and phase shift differences with improved radiative effect analysis.
Contribution
It presents new measurements of phi radiative decays and kaon decay ratios with accurate radiative corrections, providing insights into scalar meson composition and phase shifts.
Findings
Refined measurement of phi radiative decays.
Improved estimate of phase shift difference delta0-delta2.
Clarification of scalar meson structure hypotheses.
Abstract
The KLOE measurement of phi radiative decays and of the ratio Gamma(Ks->pi+pi-(gamma))/Gamma(Ks->pi0pi0) are discussed. The first measurement aims at understanding the real nature of the scalar mesons a0 and f0, whose possible compositions are qq, qqqq, or KK molecule. The second measurement is related to the estimate of the phase shift difference delta0-delta2. Previous measurements were affected by a large uncertainty due to the presence of radiative effects which are correctly included in our analysis.
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Taxonomy
TopicsQuantum Chromodynamics and Particle Interactions · Particle physics theoretical and experimental studies · Nuclear physics research studies