Study of three-body baryonic b decays .

b介子衰变至三体重子之研究。

Scientists call ordinary matter " baryonic matter " because protons and neutrons are subatomic particles called baryons .

科学家把这些常见物统称为“重子物质”，因为质子和中子都属于亚原子结构的重子。

Baryonic matter ( eg based on protons and neutrons ) tends to clump into three large groupings : planets , stars and galaxies .

重子事物（例如，基于质子和中子）偏向于堆积成三个大的集团：行星，恒星和恒星系。