2006/10/31 by L. S. Geng, Li‐Sheng Geng, E. Oset +2
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph
paper · pdf · doi:10.1103/physrevd.75.014017
published as Phys.Rev.D75:014017,2007 · published version in PRD; typos corrected; title changed to "Clues for the existence of two $K_1(1270)$ resonances"
openalex publication_date 2007/01/22 · arxiv created 2007/01/28 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
The axial-vector meson K1(1270) was studied within the chiral unitary approach, where it was shown that it has a two-pole structure. We reanalyze the high-statistics WA3 experiment K^\ensuremath-p\ensuremath→K^\ensuremath-\ensuremathπ+\ensuremathπ^\ensuremath-p at 63 GeV, which established the existence of both K1(1270) and K1(1400), and we show that it clearly favors our two-pole interpretation. We also reanalyze the traditional K-matrix interpretation of the WA3 data and find that the good fit of the data obtained there comes from large cancellations of terms of unclear physical interpretation.