2006/12/11 by Mahiko Suzuki · 1 citation
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions
paper · doi:10.1088/0954-3899/34/2/009
openalex publication_date 2006/12/11 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/30
The conspicuous threshold enhancement has been observed in the baryon–antibaryon subchannels of many three-body B decay modes. By examining the partial waves of baryon–antibaryon, we first show for that the pK ± angular correlation rules out dominance of a single partial wave for the enhancement, for instance, the resonance hypothesis or the strong final-state interaction in a single channel. The measured pK ± angular correlation turns out to be opposite to the theoretical expectation of a simple short-distance picture. We study the origin of this reversed angular correlation in the context of the partial waves and argue that bound states may be the cause of this sign reversal. Dependence of the angular correlation on the invariant mass is important for probing the underlying issue from the experimental side.