Status of 0ν2ββ search in KamLAND-Zen 800
Status of 0ν2ββ search in KamLAND-Zen 800
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KamLAND-Zen 800 中 0ν2ββ 搜索的状态
DOI：
10.1088/1742-6596/2156/1/012221
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发表时间：
2022
期刊：
影响因子：
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通讯作者：
A.Takeuchi
中科院分区：
文献类型：
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作者：
A.Takeuchi
KamLAND-Zen是一个利用136xe寻找无中微子双β衰变（0νββ衰变）的实验。我们在2019年开始了KamLAND-Zen800阶段，目标是在反向质量层次结构中进行0νββ衰变搜索。氙气散裂产品，这是一个新考虑的背景，成为Zen800的主要背景之一，因为背景减少的努力。引入有效中子数参数来标记氙散裂背景。现在我们能够测量它们的生产速率。本文介绍了在KamLAND-Zen800中0νββ衰变搜索的现状和氙散裂产物的测量方法。
KamLAND-Zen is an experiment searching for a neutrinoless double beta decay (0νββ-decay) using 136 Xe. We started the KamLAND-Zen800 phase in 2019 and are aiming to the 0νββ-decay search in the inverted mass hierarchy. Xenon spallation products, that is a newly considered background, become one of the dominant backgrounds in Zen800 as a result of background reduction efforts. A parameter Effective Number of Neutrons is introduced to tag the xenon spallation background. Now we are able to measure a production rate of them. In this proceedings, the status of 0νββ-decay search in KamLAND-Zen800 and the method to measure the xenon spallation products are described.