research

The Ξ·(2225)\eta(2225) observed by the BES Collaboration

Abstract

In the framework of the 3P0^3P_0 meson decay model, the strong decays of the 31S03 ^1S_0 and 41S04 ^1S_0 ssΛ‰s\bar{s} states are investigated. It is found that in the presence of the initial state mass being 2.24 GeV, the total widths of the 31S03 ^1S_0 and 41S04 ^1S_0 ssΛ‰s\bar{s} states are about 438 MeV and 125 MeV, respectively. Also, when the initial state mass varies from 2220 to 2400 MeV, the total width of the 41S04 ^1S_0 ssΛ‰s\bar{s} state varies from about 100 to 132 MeV, while the total width of the 31S03 ^1S_0 ssΛ‰s\bar{s} state varies from about 400 to 594 MeV. A comparison of the predicted widths and the experimental result of (0.19Β±0.03βˆ’0.06+0.04)(0.19\pm 0.03^{+0.04}_{-0.06}) GeV, the width of the Ξ·(2225)\eta(2225) with a mass of (2.24βˆ’0.02βˆ’0.02+0.03+0.03)(2.24^{+0.03+0.03}_{-0.02-0.02}) GeV recently observed by the BES Collaboration in the radiative decay J/Οˆβ†’Ξ³Ο•Ο•β†’Ξ³K+Kβˆ’KS0KL0J/\psi\to\gamma\phi\phi\to\gamma K^+K^-K^0_SK^0_L, suggests that it would be very difficult to identify the Ξ·(2225)\eta(2225) as the 31S03 ^1S_0 ssΛ‰s\bar{s} state, and the Ξ·(2225)\eta(2225) seams a good candidate for the 41S04 ^1S_0 ssΛ‰s\bar{s} state.Comment: 14 pages, 3 figures, typos corrected, Accepted by Physical Review

    Similar works

    Full text

    thumbnail-image

    Available Versions

    Last time updated on 02/01/2020