Limits on a CP-violating scalar axion-nucleon interaction
Limits on a CP-violating scalar axion-nucleon interaction
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DOI：
10.1103/physrevd.86.015001
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发表时间：
2012-07-05
影响因子：
5
通讯作者：
Raffelt, Georg
中科院分区：
文献类型：
--
作者：
Raffelt, Georg
轴子或类似的假想伪标量玻色子可能与核子有一个小的违反cp的标量汤川相互作用g(s)(N)，引起宏观的单极-偶极子力。扭平衡实验约束g(p)(e)g(s)(N)，而g(p)(N)g(s)(N)受超冷中子或自旋极化核去极化速率的约束。然而，伪标量耦合g(p)(e)和g(p)(N)受到恒星能量损失参数和g(s)(N)的强烈约束，g(s)(N)通过搜索异常单极-单极力，共同提供了g(p)(e)g(s)(N)和g(p)(N)g(s)(N)的最严格限制。实验室对g(s)(N)的限制是目前对违反cp的轴子相互作用最严格的限制。
Axions or similar hypothetical pseudoscalar bosons may have a small CP-violating scalar Yukawa interaction g(s)(N) with nucleons, causing macroscopic monopole-dipole forces. Torsion-balance experiments constrain g(p)(e)g(s)(N), whereas g(p)(N)g(s)(N) is constrained by the depolarization rate of ultra-cold neutrons or spin-polarized nuclei. However, the pseudoscalar couplings g(p)(e) and g(p)(N) are strongly constrained by stellar energy-loss arguments and g(s)(N) by searches for anomalous monopole-monopole forces, together providing the most restrictive limits on g(p)(e)g(s)(N) and g(p)(N)g(s)(N). The laboratory limits on g(s)(N) are currently the most restrictive constraints on CP-violating axion interactions.