2025/08/31 by Kotaro Murakami, Murakami, Kotaro, Sinya Aoki +9
Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #FOS: Physical sciences #High Energy Physics - Lattice (hep-lat) #High Energy Physics - Phenomenology (hep-ph) #High-Energy Particle Collisions Research #Nuclear Experiment (nucl-ex) #Nuclear Theory (nucl-th) #Quantum Chromodynamics and Particle Interactions #hep-lat #hep-ph #nucl-ex #nucl-th
paper · pdf · doi:10.48550/arxiv.2509.00838
34 pages, 20 figures, 4 tables. v3: This version contains an erratum followed by the original manuscript, which is identical to arXiv:2509.00838v2. A numerical error in the KN four-point correlation functions was corrected, and the results affected by this error were updated accordingly. The erratum presents the corrected results and discusses how the conclusions are affected
openalex publication_date 2025/08/31 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28 · arxiv created 2026/07/31 · arxiv updated 2026/08/03
We investigate S-wave kaon-nucleon (KN) interactions with strangeness S=+1 in lattice QCD using the time-dependent HAL QCD method. Employing the (2+1)-flavor gauge configuration with mπ≈ 137~\textrmMeV and mK≈ 502~\textrmMeV, we calculate the KN potentials at the leading order in the derivative expansion. The potentials in both isospin channels (I=1 and I=0) exhibit repulsion at short distances, while only the I=0 potential has a small attractive pocket at intermediate distances. From these potentials, we compute the phase shifts as well as the low-energy scattering parameters. The obtained phase shifts show no signals corresponding to resonances or bound states in both isospin channels, suggesting the absence of the Θ+(1540) pentaquark in the S-wave KN systems. The results for I=0 suggest that the scattering amplitudes in this channel are dominated by P-wave components rather than S-wave.