摘要
Scenarios for the τ mass measurement at the upgraded Beijing Electron-Positron Collider （BEPC- II ） are studied. A nested minimization procedure is used to optimize the data taking plan. It is found that by using five energy points with the total integrated luminosity of 100 pb-1, the τ mass can be determined with a statistical error of 50 keV.
Scenarios for the τ mass measurement at the upgraded Beijing Electron-Positron Collider （BEPC- II ） are studied. A nested minimization procedure is used to optimize the data taking plan. It is found that by using five energy points with the total integrated luminosity of 100 pb-1, the τ mass can be determined with a statistical error of 50 keV.
基金
Supported by National Natural Science Foundation of China (10775412, 10825524, 10935008)
Instrument Developing Project of Chinese Academy of Sciences (YZ200713)
Major State Basic Research Development Program (2009CB825203, 2009CB825206)
the Knowledge Innovation Project of Chinese Academy of Sciences (KJCX2-YW-N29)
RFBR 08-02-00328-a, 08-02-00251-a, 08-02-92200-NSFC-a
SB RAS joint project No. 32 for fundamental researcher with CAS
Department of Energy (DE-FG02-04ER41291) (U. Hawaii)
