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arXiv 1902.05342hep-phnucl-th
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重子数双单位破坏与重子寿命

Baryon-number violation by two units and the deuteron lifetime

F. Oosterhof, B. Long, J. de Vries, R. G. E. Timmermans, U. van Kolck

摘要:

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。我们建立了一个有效场论的$|ΔB|=2$相互作用,引起中子-反中子($n$ - $\bar{n}$)振荡和双核子衰变内一致的功率计数。我们计算了氘的寿命与$n$ - $\bar{n}$振荡时间的平方的比值,直到次到首阶。我们的结果,这是分析,并具有量化的不确定性,是由一个因素$\simeq 2.5$比早期的估计的基础上核模型,这影响了间接绑定他$n$ - $\bar{n}$振荡时间和未来的实验。我们讨论了如何结合测量$n$ - $\bar{n}$振荡和氘衰变可以帮助确定重子数破坏的来源。

英文摘要:

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 for $|ΔB|=2$ interactions that give rise to neutron-antineutron ($n$-$\bar{n}$) oscillations and dinucleon decay within a consistent power counting. We calculate the ratio of the deuteron lifetime to the square of the $n$-$\bar{n}$ oscillation time up to next-to-leading order. Our result, which is analytical and has a quantified uncertainty, is smaller by a factor $\simeq 2.5$ than earlier estimates based on nuclear models, which impacts the indirect bound on he $n$-$\bar{n}$ oscillation time and future experiments. We discuss how combined measurements of $n$-$\bar{n}$ oscillations and deuteron decay can help to identify the sources of baryon-number violation.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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