Parity- and Time-Reversal-Invariance-Violating Nucleon-Nucleon Interactions in the Large- \(N_c\) Expansion

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• 作者：Matthias R. Schindler
• 刊名：Few-Body Systems
• 出版年：2017
• 出版时间：March 2017
• 年：2017
• 卷：58
• 期：2
• 全文大小：
• 刊物类别：Physics and Astronomy
• 刊物主题：Particle and Nuclear Physics; Nuclear Physics, Heavy Ions, Hadrons; Atomic, Molecular, Optical and Plasma Physics;
• 出版者：Springer Vienna
• ISSN：1432-5411
• 卷排序：58

文摘

Violations of parity (P) and time reversal invariance (T) in few-nucleon systems provide interesting tests of our understanding of the Standard Model as well as sensitive probes of Beyond-the-Standard-Model physics. Because of the small size of the symmetry-violating effects, experimental constraints on symmetry-violating nucleon-nucleon interactions are currently weak, if they exist at all. We analyze both P-violating T-conserving and P-violating T-violating nucleon-nucleon interactions in terms of the large-\(N_c\) expansion of QCD to provide additional theoretical constraints. This analysis leads to a hierarchy of terms in symmetry-violating potentials, establishes relations between couplings, and helps to delineate the terms that should be most important in phenomenological applications.