In this article, we take the vector charmonium-like state Y（4660） as a φ＇ fo（980） bound state （irrespective of the hadro-charmonium and the molecular state） tentatively, and study its mass using the QCD sum ru...In this article, we take the vector charmonium-like state Y（4660） as a φ＇ fo（980） bound state （irrespective of the hadro-charmonium and the molecular state） tentatively, and study its mass using the QCD sum rules. The numerical value My = 4.71 ±0.26 GeV is consistent with the experimental data. Considering the SU（3） symmetry of the light flavor quarks and the heavy quark symmetry, we also study the bound states φ＇a（400-1200）, γ′″ fo（980）, and γ′″σ（400-1200） with the QCD sum rules, and make reasonable predictions for their masses.展开更多
In this proceeding, we propose to directly measure the a0^0（980）-f0 （980） mixing in J/ψ→φf0（980）→φa0^0（980） and Xc1→π^0a0^0（980） →π^0f0（980） with the upgraded Beijing Electron Positron Collider（B...In this proceeding, we propose to directly measure the a0^0（980）-f0 （980） mixing in J/ψ→φf0（980）→φa0^0（980） and Xc1→π^0a0^0（980） →π^0f0（980） with the upgraded Beijing Electron Positron Collider（BEPCII） with BESIII detector. We show that a narrow peak of about 8 MeV will be produced by the a0^0（980）-f0（980） mixing, and the predominant feature makes it standing out from the background contributions. The predicted branching ratios for these two reactions are both expected to be about O（10^-6）, which is unambiguously accessible with 10^9 J/ψ and 3 × 10^8 Xc1 at BESⅢ.展开更多
We investigate the D^0-D^-0 mixing through the doubly Cabibbo suppressed （DCS） channel D0 → f0（980）K^＊0 and its charge conjugate channel, in which the K^＊0 meson is reconstructed in both K^＋π^- and Ksπ^0 fin...We investigate the D^0-D^-0 mixing through the doubly Cabibbo suppressed （DCS） channel D0 → f0（980）K^＊0 and its charge conjugate channel, in which the K^＊0 meson is reconstructed in both K^＋π^- and Ksπ^0 final state. Although the decay D0 → f0（980）K^＊ has a small branching ratio, the final state mesons are relatively easy to identify. The f0（980） meson can be replaced by the S-wave π^＋π^- state, or a longitudinally polarized vector meson ρ^0. All mixing parameters, including the mass difference and decay width difference, can be extracted by studying the time-dependent decay width of these channels. We show that the method is valid in all regions for mixing parameters and it does not depend on the strong phase difference.展开更多
基金Supported by National Natural Science Foundation under Grant No.10775051 Program for New Century Excellent Talents in University under Grant No.NCET-07-0282 Project Supported by Chinese Universities Scientific Fund
文摘In this article, we take the vector charmonium-like state Y（4660） as a φ＇ fo（980） bound state （irrespective of the hadro-charmonium and the molecular state） tentatively, and study its mass using the QCD sum rules. The numerical value My = 4.71 ±0.26 GeV is consistent with the experimental data. Considering the SU（3） symmetry of the light flavor quarks and the heavy quark symmetry, we also study the bound states φ＇a（400-1200）, γ′″ fo（980）, and γ′″σ（400-1200） with the QCD sum rules, and make reasonable predictions for their masses.
基金Supported by National Natural Science Foundation of China (10435080,10521003,10675131)Chinese Academy of Sciences Knowledge Innovation Project (KJCX3-SYW-N2)
文摘In this proceeding, we propose to directly measure the a0^0（980）-f0 （980） mixing in J/ψ→φf0（980）→φa0^0（980） and Xc1→π^0a0^0（980） →π^0f0（980） with the upgraded Beijing Electron Positron Collider（BEPCII） with BESIII detector. We show that a narrow peak of about 8 MeV will be produced by the a0^0（980）-f0（980） mixing, and the predominant feature makes it standing out from the background contributions. The predicted branching ratios for these two reactions are both expected to be about O（10^-6）, which is unambiguously accessible with 10^9 J/ψ and 3 × 10^8 Xc1 at BESⅢ.
基金National Natural Science Foundation of China (10735080, 10625525)
文摘We investigate the D^0-D^-0 mixing through the doubly Cabibbo suppressed （DCS） channel D0 → f0（980）K^＊0 and its charge conjugate channel, in which the K^＊0 meson is reconstructed in both K^＋π^- and Ksπ^0 final state. Although the decay D0 → f0（980）K^＊ has a small branching ratio, the final state mesons are relatively easy to identify. The f0（980） meson can be replaced by the S-wave π^＋π^- state, or a longitudinally polarized vector meson ρ^0. All mixing parameters, including the mass difference and decay width difference, can be extracted by studying the time-dependent decay width of these channels. We show that the method is valid in all regions for mixing parameters and it does not depend on the strong phase difference.
