2022/01/31 by Qin-Song Zhou, Jun-Zhang Wang, Xiang Liu +1 · 7 citations
Mathematics · Physics and Astronomy · #Algorithm #Combinatorics #High-Energy Particle Collisions Research #Isovector #Mathematics #Meson #Nuclear physics #Nucleon #Omega #Particle physics #Particle physics theoretical and experimental studies #Physics #Prime (order theory) #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #Vector meson #hep-ex #hep-ph
paper · pdf · doi:10.1103/physrevd.105.074035
published in Physical review. D/Physical review. D. 105(7) (American Physical Society) · 8 pages, 4 figures and 3 tables
openalex publication_date 2022/04/29 · arxiv created 2022/04/30 · openalex created_date 2022/05/01 · arxiv updated 2022/05/03 · openalex updated_date 2026/08/01
The properties of the light vector meson states around 2.0 GeV have been poorly understood for a long time, which has become a barrier to the expansion to higher light vector meson spectrum. Recently, the BESIII collaboration released the measurements of the e+e^\ensuremath-\ensuremath→\ensuremathω\ensuremathπ0 and e+e^\ensuremath-\ensuremath→\ensuremathρ\ensuremathη^\ensuremath' reactions above 2.0 GeV, both of which are ideal processes to study the isovector \ensuremathρ meson family. In this work, through carrying out a combined analysis of the Born cross section data for the above two processes with the theoretical support on mass spectrum, and production and strong decay behaviors of the \ensuremathρ meson family around 2.0 GeV, we identify the enhancement structure near 2034 MeV observed in e+e^\ensuremath-\ensuremath→\ensuremathω\ensuremathπ0 to be the interference contribution from two resonances \ensuremathρ(1900) and \ensuremathρ(2150), and another enhancement structure at 2111 MeV reported in e+e^\ensuremath-\ensuremath→\ensuremathρ\ensuremathη^\ensuremath' to be the contributions from \ensuremathρ(2000) and \ensuremathρ(2150). This conclusion means that the e+e^\ensuremath-\ensuremath→\ensuremathω\ensuremathπ0 and e+e^\ensuremath-\ensuremath→\ensuremathρ\ensuremathη^\ensuremath' are the excellent golden channels to establish \ensuremathρ(1900) and \ensuremathρ(2000), especially for a D-wave state \ensuremathρ(2000), whose experimental search in the e+e^\ensuremath- collision should be quite challenging. The relevant cross section measurements with higher precision are expected in the future BESIII and Belle II experiments.