θ对氘核binding energy和三α过程的影响
Effects of theta on the deuteron binding energy and the triple-alpha process
摘要：
我们研究了一个非零的强CP破坏参数θ对氘核和双质子结合能以及三α过程的影响。这两个系统都表现出微调，因此核力的微小变化可能会产生灾难性的后果。这种核力在这里是在π介子和核子的有效拉格朗日量的框架内理解的，相互作用的强度随θ而变化。我们发现效果并不太显著。
英文摘要：
We study the effects that a non zero strong-CP-violating parameter theta would have on the deuteron and diproton binding energies and on the triple-alpha process. Both these systems exhibit fine tuning, so it is plausible that a small change in the nuclear force would produce catastrophic consequences. Such a nuclear force is here understood in the framework of an effective Lagrangian for pions and nucleons, and the strength of the interaction varies with theta. We find that the effects are not too dramatic.
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