Resonances formed by pbar-p and decaying into pizero-pizero-eta for masses 1960 to 2410 MeV

TL;DR

This study investigates pbar-p annihilation into pi0-pi0-eta across various energies, identifying multiple resonances with specific quantum numbers and masses, through partial wave analysis of experimental data.

Contribution

It provides new evidence for several s-channel resonances in pbar-p annihilation, detailing their quantum numbers, masses, and widths, expanding understanding of meson resonance spectrum.

Findings

Identification of multiple resonances with specific quantum numbers.

Evidence for s-channel resonances at various masses.

Detailed partial wave analysis results.

Abstract

Data on pbar-b annihilation in flight into pizero-pizero-eta are presented for nine beam momenta 600 to 1940 MeV/c. The strongest four intermediate states are found to be f_2(1270)-eta, a_2(1320)-pi, sigma-eta and a_0(980)-pi. Partial wave analysis is performed mainly to look for resonances formed by pbar-p and decaying into pizero-pizero-eta through these intermediate states. There is evidence for the following s-channel I = 0 resonances : two 4^{++} resonances with mass and width (M,Gamma) at (2044, 208) MeV and (2320+-30, 220+-30) MeV; three 2^{++} resonances at (2020+-50, 200+-70) MeV, (2240+-40, 170+-50) MeV and (2370+-50, 320+-50) MeV; two 3^{++} resonances at (2000+-40, 250+-40) MeV and (2280+-30, 210+-30) MeV; a 1^{++} resonance at (2340+-40, 340+-40) MeV; and two 2^{-+} resonances at (2040+-40, 190+-40) MeV and (2300+-40, 270+-40) MeV.