We present Monte Carlo studies on the singly tagged D mesons, which are crucial in the absolute measurements of D meson decays, based on a full Monte Carlo simulation for the BES-III detector, with the BES-III Offline...We present Monte Carlo studies on the singly tagged D mesons, which are crucial in the absolute measurements of D meson decays, based on a full Monte Carlo simulation for the BES-III detector, with the BES-III Offline Software System. The expected detection efficiencies and mass resolutions of the tagged D mesons are well estimated.展开更多
It is noted that the rescattering and annihilation effects are significant in the penguin-dominant B→ VV decays. In this work, we suggest to use a unique operator at the quark level to describe all the rescattering a...It is noted that the rescattering and annihilation effects are significant in the penguin-dominant B→ VV decays. In this work, we suggest to use a unique operator at the quark level to describe all the rescattering and the penguin-induced annihilation effects in B→ φK^＊, and the coefficient of the operator depends on the polarizations of the produced mesons. By the flavour SU（3） symmetry, we apply the same scenario to all the penguin-dominant B0190 VV modes.展开更多
We discuss the moment analysis method for the 0^(++)and 2^(++)coupling mode of fJ(1710)for incomplete phase space in the radiative decay J/ψ→γK^(+)K^(-),and give a new formulation of analyzing the fJ(1710)structure...We discuss the moment analysis method for the 0^(++)and 2^(++)coupling mode of fJ(1710)for incomplete phase space in the radiative decay J/ψ→γK^(+)K^(-),and give a new formulation of analyzing the fJ(1710)structure for the Beijing Spectrometer detector at the Beijing Electron-Positron Collider.The incomplete detection phase space results in a significant effect on the moment analysis.展开更多
We investigate the finite-temperature phase structure in a scaled chiral model which includes the dilaton(glueball)field.It is shown that hot nuclear matter undergoes a discontinuous transition in the mean field of sc...We investigate the finite-temperature phase structure in a scaled chiral model which includes the dilaton(glueball)field.It is shown that hot nuclear matter undergoes a discontinuous transition in the mean field of scalar mesons as well as the Lee-Wick abnormal transition.The corresponding behavior of the gluon condensate during the chiral phase transition is also studied.展开更多
We theoretically evaluate the decay rates of a scalar glueball up to the order O（αs）, where only two Feynman diagrams contribute and a special attention is paid on possible flavour SU（3） symmetry breaking in the ...We theoretically evaluate the decay rates of a scalar glueball up to the order O（αs）, where only two Feynman diagrams contribute and a special attention is paid on possible flavour SU（3） symmetry breaking in the process. It is concluded that the SU（3） flavour symmetry may be respected in any case. However, due to chiral suppression in Go →qq, F（Go →qq qq） very likely is larger than F（Go→qq）. These results are supported by the experimental data on the decays of xco（1P） （0^＋＋）. Based on this result, we propose a criterion to identify the scalar glueball.展开更多
基金Supported by the National Natural Science Foundation of China under contracts Nos 10775075 and 10835001.
文摘We present Monte Carlo studies on the singly tagged D mesons, which are crucial in the absolute measurements of D meson decays, based on a full Monte Carlo simulation for the BES-III detector, with the BES-III Offline Software System. The expected detection efficiencies and mass resolutions of the tagged D mesons are well estimated.
基金Supported by the National Natural Science Foundation of China under Grant No 10775117.
文摘It is noted that the rescattering and annihilation effects are significant in the penguin-dominant B→ VV decays. In this work, we suggest to use a unique operator at the quark level to describe all the rescattering and the penguin-induced annihilation effects in B→ φK^＊, and the coefficient of the operator depends on the polarizations of the produced mesons. By the flavour SU（3） symmetry, we apply the same scenario to all the penguin-dominant B0190 VV modes.
基金Supported in part by the National Natural Science Foundation of China under Grant No.19905011the Beijing Sepectrometer Collaboration Project.
文摘We discuss the moment analysis method for the 0^(++)and 2^(++)coupling mode of fJ(1710)for incomplete phase space in the radiative decay J/ψ→γK^(+)K^(-),and give a new formulation of analyzing the fJ(1710)structure for the Beijing Spectrometer detector at the Beijing Electron-Positron Collider.The incomplete detection phase space results in a significant effect on the moment analysis.
基金Supported by the National Natural Science Foundation of China under Grant No.19875026。
文摘We investigate the finite-temperature phase structure in a scaled chiral model which includes the dilaton(glueball)field.It is shown that hot nuclear matter undergoes a discontinuous transition in the mean field of scalar mesons as well as the Lee-Wick abnormal transition.The corresponding behavior of the gluon condensate during the chiral phase transition is also studied.
基金Supported by the National Natural Science Foundation of China under Grant No 10775117.
文摘We theoretically evaluate the decay rates of a scalar glueball up to the order O（αs）, where only two Feynman diagrams contribute and a special attention is paid on possible flavour SU（3） symmetry breaking in the process. It is concluded that the SU（3） flavour symmetry may be respected in any case. However, due to chiral suppression in Go →qq, F（Go →qq qq） very likely is larger than F（Go→qq）. These results are supported by the experimental data on the decays of xco（1P） （0^＋＋）. Based on this result, we propose a criterion to identify the scalar glueball.
