Based on 58 million J/ψ data collected with the BESII detector at the BEPC, Partial Wave Analysis（PWA） is performed on J/ψ→ppπ0. The new excited baryon N（2065） is confirmed. Clear signals for other N＊ states ...Based on 58 million J/ψ data collected with the BESII detector at the BEPC, Partial Wave Analysis（PWA） is performed on J/ψ→ppπ0. The new excited baryon N（2065） is confirmed. Clear signals for other N＊ states are observed and the corresponding masses, widths and spin-parity are also measured. Processes such as J/ψ→ppη,ppη＇are also studied and the branching ratios are measured.展开更多
In this study,we consider all P-wave Ω_(b) states represented by interpolating currents with a derivative and calculate the corresponding masses and pole residues using the QCD sum rule method.Because of the large un...In this study,we consider all P-wave Ω_(b) states represented by interpolating currents with a derivative and calculate the corresponding masses and pole residues using the QCD sum rule method.Because of the large uncertainties in our calculation compared with the small difference in the masses of the excited Ω_(b) states observed by the LHCb collaboration,it is necessary to study other properties of the P-wave Ω_(b) states represented by the interpolating currents investigated in the present work to gain a better understanding of the four excited Ω_(b) states observed by the LHCb collaboration.展开更多
基金Supported by National Natural Science Foundation of China (19991480)
文摘Based on 58 million J/ψ data collected with the BESII detector at the BEPC, Partial Wave Analysis（PWA） is performed on J/ψ→ppπ0. The new excited baryon N（2065） is confirmed. Clear signals for other N＊ states are observed and the corresponding masses, widths and spin-parity are also measured. Processes such as J/ψ→ppη,ppη＇are also studied and the branching ratios are measured.
基金Supported by the National Natural Science Foundation of China(11675263)。
文摘In this study,we consider all P-wave Ω_(b) states represented by interpolating currents with a derivative and calculate the corresponding masses and pole residues using the QCD sum rule method.Because of the large uncertainties in our calculation compared with the small difference in the masses of the excited Ω_(b) states observed by the LHCb collaboration,it is necessary to study other properties of the P-wave Ω_(b) states represented by the interpolating currents investigated in the present work to gain a better understanding of the four excited Ω_(b) states observed by the LHCb collaboration.
