Study of η(1405)/η(1475) in $$ J/\psi \to \gamma {K}_S^0{K}_S^0{\pi}^0 $$ decay

Journal article

Using a sample of (10.09 ± 0.04) × 109J/ψ decays collected with the BESIII detector, partial wave analyses of the decay J/ψ→γKS0KS0π0 are performed within the KS0KS0π0 invariant mass region below 1.6 GeV/c2. The covariant tensor amplitude method is used in both mass independent and mass dependent approaches. Both analysis approaches exhibit dominant pseudoscalar and axial vector components, and show good consistency for the other individual components. Furthermore, the mass dependent analysis reveals that the KS0KS0π0 invariant mass spectrum for the pseudoscalar component can be well described with two isoscalar resonant states using relativistic Breit-Wigner model, i.e., the η(1405) with a mass of 1391.7±0.7−0.3+11.3 MeV/c2 and a width of 60.8±1.2−12.0+5.5 MeV, and the η(1475) with a mass of 1507.6±1.6−32.2+15.5 MeV/c2 and a width of 115.8±2.4−10.9+14.8 MeV. The first and second uncertainties are statistical and systematic, respectively. Alternate models for the pseudoscalar component are also tested, but the description of the KS0KS0π0 invariant mass spectrum deteriorates significantly. [Figure not available: see fulltext.

Authors: Ablikim, M; Achasov, MN; Adlarson, P; Albrecht, M; Aliberti, R

• Publication status: Published
• Peer review status: Peer reviewed
• Publisher: Springer
• Journal: Journal of High Energy Physics
• Volume: 2023
• Issue: 3
• Pages: 121
• Publication date: 2023-03-17
• DOI: 10.1007/jhep03(2023)121
• EISSN: 1029-8479
• ISSN: 1126-6708
• Language: English