Baryon-Number Violation by Two Units and the Deuteron Lifetime
Baryon-Number Violation by Two Units and the Deuteron Lifetime
复制标题
两个单位的重子数违规和氘核寿命
DOI：
10.1103/physrevlett.122.172501
复制
发表时间：
2019
影响因子：
8.6
通讯作者：
van Kolck U.
中科院分区：
文献类型：
--
作者：
Oosterhof F.;Long B.;de Vries J.;Timmermans R. G. E.;van Kolck U.
我们用与重子数相差两个单位的九维夸克算符计算了氘核的寿命。我们构造了一个有效场论，讨论了在一致功率计数下引起中子-反中子振荡和双核子衰变的相互作用。我们计算了氘的寿命与振荡时间的平方的比值，直到次至首阶。我们的结果，这是分析和量化的不确定性，是小于一个因素比早期的估计基于核模型，这影响了间接约束的振荡时间和未来的实验。我们讨论如何结合测量振荡和氘衰变可以帮助确定重子数破坏的来源。
We calculate the lifetime of the deuteron with dimension-nine quark operators that violate baryon number by two units. We construct an effective field theory forinteractions that give rise to neutron-antineutron () oscillations and dinucleon decay within a consistent power counting. We calculate the ratio of the deuteron lifetime to the square of theoscillation time up to next-to-leading order. Our result, which is analytical and has a quantified uncertainty, is smaller by a factorthan earlier estimates based on nuclear models, which impacts the indirect bound on theoscillation time and future experiments. We discuss how combined measurements ofoscillations and deuteron decay can help to identify the sources of baryon-number violation.