Search for invisible modes of nucleon decay in water with the SNO+ detector

Search for invisible modes of nucleon decay in water with the SNO+ detector
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使用 SNO 探测器寻找水中核子衰变的不可见模式

DOI:
10.1103/physrevd.99.032008
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发表时间:
2019
期刊:
影响因子:
5
通讯作者:
Anderson M
Anderson M
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Anderson M

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本文报告了通过不可见模式寻找核子衰变的结果,在不可见模式下,在衰变过程中,在初始水相中,没有可见能量直接沉积。然而,这种在氧核内的衰变会产生一个被激发的子粒子,随后会失活,通常会释放出可探测到的伽马射线。对于中子的部分寿命,对这种伽马射线的搜索产生了90%贝叶斯可信度水平的限制(具有先前的均匀率),对于质子的部分寿命,后者比SNO先前的限制提高了70%。我们还提出了for、forand和for的不可见双核子模式的部分寿命极限,对后两者的现有极限进行了近3个数量级的改进。
This paper reports results from a search for nucleon decay through invisible modes, where no visible energy is directly deposited during the decay itself, during the initial water phase of. However, such decays within the oxygen nucleus would produce an excited daughter that would subsequently deexcite, often emitting detectable gamma rays. A search for such gamma rays yields limits ofat 90% Bayesian credibility level (with a prior uniform in rate) for the partial lifetime of the neutron, andfor the partial lifetime of the proton, the latter a 70% improvement on the previous limit from SNO. We also present partial lifetime limits for invisible dinucleon modes offor,forandfor, an improvement over existing limits by close to 3 orders of magnitude for the latter two.
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DOI: --
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