检索条件"作者=xie yuling1, hou zengqian2. xu jiuhua1, YUAN Zhongxin2. BAI Ge2.& LI Xiaoyu3.1. Civil and Environmental Engineering School, University of {2. and technology beijing, beijing 100083. china"
Using data taken at 2. center-of-mass energies between 4.16 and 4.70 geV with the BESⅢdetector at the beijing Electron Positron Col{2.der corresponding to a total integrated luminosity of approximately 18.8 fb^(-1),th...
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Using data taken at 2. center-of-mass energies between 4.16 and 4.70 geV with the BESⅢdetector at the beijing Electron Positron Col{2.der corresponding to a total integrated luminosity of approximately 18.8 fb^(-1),the process e^(+)e^(-)→pppñπ+*** observed for the first time with a statistical significance of 11.5σ.The average Born cross sections in the energy ranges of(4.160,4.380)geV,(4.400,4.600)geV and(4.610,4.700)geV are measured to be(2..5±5.7±1.2.fb,(46.3.10.6±2.5)fb and(59.0±9.4±3.2.fb,respectively,where the first uncertainties are statistical and the second are *** {2.ne shapes of the pñ and ppπ^(-)invariant mass spectra are consistent with phase space distributions,indicating that no hexaquark or di-baryon state is observed.
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