Pseudoscalar versus pseudovector pion-nucleon couplings in the nucleonic axion bremsstrahlung rate of neutron-star matter.

Pseudoscalar versus pseudovector pion-nucleon couplings in the nucleonic axion bremsstrahlung rate of neutron-star matter.
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中子星物质核轴子轫致辐射率中的赝标量与赝矢量π介子-核子耦合。

DOI:
10.1103/physrevd.39.2120
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发表时间:
1989
期刊:
Physical Review D, Particles and fields
影响因子:
--
通讯作者:
Iwamoto
Iwamoto
中科院分区:
--
文献类型:
--
作者:
Iwamoto

文献摘要

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伪标量和伪向量的区别。pi.. N耦合检查的背景下,核子轴子韧致辐射率。在赝矢量耦合下,八个图构成了轴子韧致辐射的矩阵元。另一方面,这八个图的赝标量耦合的天真使用给出了不同的矩阵元素,并且通常高估了一个数量级的退化中子星物质通过中子-中子轴子韧致辐射的能量损失率。
The difference between the pseudoscalar and pseudovector ..pi..N couplings are examined in the context of the nucleonic axion bremsstrahlung rate. With the pseudovector coupling, eight diagrams contribute to the matrix element for axion bremsstrahlung. A naive use of the pseudoscalar coupling for these eight diagrams, on the other hand, gives a different matrix element and overestimates the energy-loss rate of degenerate neutron-star matter via neutron-neutron axion bremsstrahlung typically by an order of magnitude.