WEAK MESON-EXCHANGE CURRENTS AND THE TRITIUM BETA-DECAY

被引：26

作者：

ADAM, J ^{[1
]}

HAJDUK, C ^{[1
]}

HENNING, H ^{[1
]}

SAUER, PU ^{[1
]}

TRUHLIK, E ^{[1
]}

机构：

[1] UNIV HANOVER, THEORET PHYS, W-3000 HANNOVER, GERMANY

来源：

NUCLEAR PHYSICS A | 1991年 / 531卷 / 3-4期

关键词：

D O I：

10.1016/0375-9474(91)90744-Q

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

Meson-exchange corrections of the nuclear axial current are derived and expanded up to relativistic order (1/m(N))2. They are obtained from a phenomenological chiral-invariant lagrangian based on the exchange of pi-, rho- and A1-mesons. The axial exchange currents are appropriate for general calculations of weak nuclear properties. The paper tests them for the Gamow-Teller matrix element of tritium beta-decay. The theoretical prediction of the Gamow-Teller matrix element is, within the theoretical uncertainty, in fair agreement with its experimental value.

引用

页码：623 / 664

页数：42

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