arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1109.3604hep-phnucl-th
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用手征有效场论计算轻核的电偶极矩

Electric Dipole Moments of Light Nuclei From Chiral Effective Field Theory

J. de Vries, R. Higa, C. -P. Liu, E. Mereghetti, I. Stetcu, R. G. E. Timmermans, U. van Kolck

摘要:

利用手征有效场论(EFT)的系统展开,建立了计算轻核电偶极矩的框架。我们考虑了宇称(P)和时间反演(T)的破坏,在夸克-胶子水平上,源于QCD真空角和六维算符捕获物理超越标准模型。我们认为,轻核的EDMs可以用出现在P-和T-破坏核势和电流中的六个低能常数来表示。作为例子,我们计算了在EFT展开中处于领先顺序的氘核、triton和3 He的EDM。

英文摘要:

We set up the framework for the calculation of electric dipole moments (EDMs) of light nuclei using the systematic expansion provided by chiral effective field theory (EFT). We take into account parity (P) and time-reversal (T) violation which, at the quark-gluon level, originates from the QCD vacuum angle and dimension-six operators capturing physics beyond the Standard Model. We argue that EDMs of light nuclei can be expressed in terms of six low-energy constants that appear in the P- and T-violating nuclear potential and electric current. As examples, we calculate the EDMs of the deuteron, the triton, and 3He in leading order in the EFT expansion.

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