2024/10/24 by Hungchong Kim, Kim, Hungchong, K. S. Kim +1
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High Energy Physics - Phenomenology (hep-ph) #High-Energy Particle Collisions Research #Nuclear Theory (nucl-th) #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions
paper · pdf · doi:10.48550/arxiv.2410.18589
openalex publication_date 2024/10/24 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
There are three scalar nonets in the Particle Data Group (PDG), one of which includes [a0(980), K0^*(700)], another includes [a0(1450), K0^*(1430)], and the third includes [a0(1710), K0^*(1950)]. Motivated by Ref.[1], we examine an alternative mixing mechanism that could potentially explain the small mass difference between the a0 (1450) and K0^* (1430). According to the tetraquark mixing model, two types, distinguished by their color-spin structures, are necessary to describe the tetraquark structure of the two nonets containing [a0(980), K0^*(700)] and [a0(1450), K0^*(1430)]. Considering the color-spin structures, we argue that the mixing mechanism generating a0(1450) and K0^* (1430) on the one hand, and a0(1710) and K0^* (1950) on the other hand might be relevant for resolving the small mass difference. We also discuss the limitations of other mixing mechanisms that generate the two nonets involving [a0(980),K0^*(700)] and [a0(1450), K0^* (1430)] or [a0(980),K0^*(700)] and [a0(1710), K0^* (1950)]