Recently,taking advantage of the large volume of data collected by the detector,the BESIII International Collaboration successfully measured the decay constant for the charmed meson D+-with the best precision to date....Recently,taking advantage of the large volume of data collected by the detector,the BESIII International Collaboration successfully measured the decay constant for the charmed meson D+-with the best precision to date.As an unstable particle,the charmed meson D+can decay via many different pathways,each with a different possibility.In the process of the decay,its constituent heavy charm quark can transform itself into other particles,thereby diverting the subsequent decay cascade into a different pathway or a different decay network.展开更多
文摘Recently,taking advantage of the large volume of data collected by the detector,the BESIII International Collaboration successfully measured the decay constant for the charmed meson D+-with the best precision to date.As an unstable particle,the charmed meson D+can decay via many different pathways,each with a different possibility.In the process of the decay,its constituent heavy charm quark can transform itself into other particles,thereby diverting the subsequent decay cascade into a different pathway or a different decay network.
