1ST TEST OF CP INVARIANCE IN THE DECAY OF POSITRONIUM

被引：30

作者：

SKALSEY, M

VANHOUSE, J

机构：

[1] Randall Laboratory of Physics, University of Michigan, Ann Arbor

来源：

PHYSICAL REVIEW LETTERS | 1991年 / 67卷 / 15期

关键词：

D O I：

10.1103/PhysRevLett.67.1993

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The 3-gamma decay of spin-aligned triplet positronium (Ps) is used for a test of CP invariance (charge conjugation and parity). This is the first use of the Ps atom to investigate the CP symmetry. The angular correlation (S triple-overdot . k triple-overdot 1) (S triple-overdot . k triple-overdot 1 x k triple-overdot 2) was measured, where S is the Ps spin and \k1\ > \k2\ > \k3\ are the gamma momenta. If this correlation has a nonzero amplitude, CP is not conserved. No amplitude was found at the 1.5% level of uncertainty.

引用

页码：1993 / 1996

页数：4

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