2009/09/08 by Jia-Jun Wu, Sayipjamal Dulat, S. Dulat +1 · 49 citations
Physics and Astronomy · #High-Energy Particle Collisions Research #Lambda #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #Resonance (particle physics) #hep-ph
paper · pdf · doi:10.1103/physrevc.81.045210
published in Physical Review C 81(4) (American Institute of Physics) · 15 pages, 40 figures
arxiv created 2009/09/08 · openalex publication_date 2010/04/30 · arxiv updated 2010/05/12 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
The unquenched quark models predict the new particle \ensuremathΣ* with spin-parity JP=1/2^\ensuremath- and its mass is around the well-established \ensuremathΣ*(1385) with JP=3/2+. Here, by using the effective Lagrangian approach, we study K^\ensuremath-p\ensuremath→\ensuremathΛ\ensuremathπ^\ensuremath-\ensuremathπ+ reaction at the range of \ensuremathΛ*(1520) peak, comparing the resulting total cross section, and \ensuremathπ+\ensuremathπ^\ensuremath-, \ensuremathΛ\ensuremathπ+, \ensuremathΛ\ensuremathπ^\ensuremath- invariant squared mass distributions for various incident K^\ensuremath- momenta, as well as the production angular distribution of the \ensuremathΛ with the data from the Lawrence Berkeley Laboratory 25-inch hydrogen bubble chamber; we find that, apart from the existing resonance \ensuremathΣ*(1385) with JP=3/2+, there is evidence for possible existence of the new resonance \ensuremathΣ* with JP=1/2^\ensuremath- around 1380 MeV. Higher statistic data on relevant reactions are needed to clarify the situation.