12,363 research outputs found

    Implication of BaBar's new data on the Ds1(2710)D_{s1}(2710) and DsJ(2860)D_{sJ}(2860)

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    The strong decays of the Ds1(2710)D_{s1}(2710) and DsJ(2860)D_{sJ}(2860) are investigated in the framework of the 3P0^3P_0 model. Its decay properties newly reported by the BaBar Collaboration can be reasonably accounted for in the presence of the Ds1(2710)D_{s1}(2710) being a mixture of the Ds(23S1)D_s(2 ^3S_1) and Ds(13D1)D_s(1 ^3D_1). The orthogonal partner of the Ds1(2710)D_{s1}(2710) is expected to have a mass of about 2.66∼2.92.66\sim 2.9 GeV in quark models and a width of about 40∼6040\sim 60 MeV in the 3P0^3P_0 model. The predicted decay properties turn out to be consistent with the BaBar's new data in both the orthogonal partner of the Ds1(2710)D_{s1}(2710) and the Ds(13D3)D_s(1 ^3D_3) interpretations for the DsJ(2860)D_{sJ}(2860). The available experimental information is not enough to distinguish these two possibilities. The E1E1 radiative transitions of the Ds1(2710)D_{s1}(2710) and DsJ(2860)D_{sJ}(2860) are also studied. We tend to conclude that the Ds1(2710)D_{s1}(2710) can be identified as a mixture of the Ds(23S1)D_s(2 ^3S_1) and Ds(13D1)D_s(1 ^3D_1), and the DsJ(2860)D_{sJ}(2860) could be either the orthogonal partner of the Ds1(2710)D_{s1}(2710) or the Ds(13D3)D_s(1 ^3D_3). Further experimental information on the DsJ(2860)D_{sJ}(2860) in the DsΞ·D_s\eta, Dsβˆ—Ξ·D^\ast_s\eta, and DKβˆ—DK^\ast channels is needed.Comment: 13 pages, 2 figures, version accepted for publication in Phys. Rev.

    Properties of the scalar mesons f0(1370)f_0(1370), f0(1500)f_0(1500) and f0(1710)f_0(1710)

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    In the three-state mixing framework, considering the possible glueball components of Ξ·\eta and Ξ·β€²\eta^\prime, we investigate the hadronic decays of f0(1370)f_0(1370), f0(1500)f_0(1500) and f0(1710)f_0(1710) into two pseudoscalar mesons. The quarkonia-glueball content of the three states is determined from the fit to the new data presented by the WA102 Collaboration. We find that these data are insensitive to the possible glueball components of Ξ·\eta and Ξ·β€²\eta^\prime. Furthermore, we discuss some properties of the mass matrix describing the mixing of the isoscalar scalar mesons.Comment: Latex 14 pages including 1 eps figur

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

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    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
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