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首页> 外文期刊>Bulletin of the American Physical Society >APS -84th Annual Meeting of the APS Southeastern Section - Event - Neutron-Antineutron Oscillation and Annihilation on C-12 at the European Spallation Source
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APS -84th Annual Meeting of the APS Southeastern Section - Event - Neutron-Antineutron Oscillation and Annihilation on C-12 at the European Spallation Source

机译：APS-APS东南分部第84届年会-事件-欧洲散裂源C-12的中子-反中子振荡和An灭

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In the Standard Model, baryon and lepton number (B, L) are conserved. However, Sakharov showed that in the early universe violation of B was a requirement to explain the matter-antimatter asymmetry. One type of B violation being focused on at the ESS is that of neutron-antineutron oscillation (n---~{n}), a $Delta $B $=$ 2 process, thus showing that baryon number is not conserved. The ESS aims to search for n---~{n} at a soon to be constructed, high-intensity neutron beamline. There, if n---~{n} occurs, the neutron will travel down the beamline, oscillate into an antineutron, and hit a target of carbon nanofoil; this is similar to a previous search at the ILL in Grenoble. On this nanofoil, annihilation to mesons would occur with individual carbon nuclei, those mesons being collected on a high-resolution detector. Currently, MC data generation and analysis is underway for the ESS collaboration with the aid of E. Golubeva, hoping to properly model the appropriate nuclear interactions. For purposes of validation and verification, this work provides a detailed overview of antinucleon-nucleon annihilation properties. It is important to study such generated data in order to make more definite predictions of the efficiency for the detection of n---~{n}.
机译：在标准模型中，重子和轻子数（B，L）是守恒的。但是，萨哈罗夫（Sakharov）表明，在早期宇宙中，违反B是解释物质-反物质不对称性的必要条件。在ESS上关注的B违反的一种类型是中子-反中子振荡（n ---〜{n}），这是$ Delta $ B $ = $ 2的过程，因此表明重子数不守恒。 ESS的目标是在即将建造的高强度中子束线中搜寻n--〜{n}。在那里，如果发生n--〜{n}，则中子将沿束线传播，振荡成反中子，并击中碳纳米箔的目标;这类似于之前在格勒诺布尔ILL进行的搜索。在这种纳米箔上，单个碳原子核会发生介子的an灭，这些介子会在高分辨率探测器上收集。目前，在E. Golubeva的帮助下，用于ESS合作的MC数据生成和分析正在进行中，希望能够正确地建模适当的核相互作用。为了进行验证和验证，这项工作提供了反核子-核子an灭特性的详细概述。重要的是研究这样生成的数据，以便对n ---〜{n}的检测效率做出更明确的预测。

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