A search for interactions from solar $^8$B neutrinos elastically scattering off xenon nuclei using PandaX-4T commissioning data is reported. The energy threshold of this search is further lowered compared with the previous search for dark matter, with various techniques utilized to suppress the background that emerges from data with the lowered threshold. A blind analysis is performed on the data with an effective exposure of 0.48 tonne$\cdot$year, and no significant excess of events is observed. Among results obtained using the neutrino-nucleus coherent scattering, our results give the best constraint on the solar $^8$B neutrino flux. We further provide a more stringent limit on the cross section between dark matter and nucleon in the mass range from 3 to 9 GeV/c$^2$.
GPS-Synchronized Monitoring of Core-collapse Supernova Bursts with PandaX-4T via Coherent Elastic Neutrino Nuclear Scattering
Research Center for Particle Science and Technology, Institute of Frontier and Interdisciplinary Science, Shandong University(山东大学前沿交叉科学研究院粒子科学与技术研究中心);Key Laboratory of Particle Physics and Particle Irradiation of Ministry of Education, Shandong University(山东大学教育部粒子物理与粒子辐照重点实验室);State Key Laboratory of Dark Matter Physics, Key Laboratory for Particle Astrophysics and Cosmology (MoE), Shanghai Key Laboratory for Particle Physics and Cosmology, School of Physics and Astronomy, Shanghai Jiao Tong University(上海交通大学物理与天文学院暗物质物理国家重点实验室粒子天体物理学与宇宙学教育部重点实验室上海粒子物理与宇宙学重点实验室);Shanghai Jiao Tong University Sichuan Research Institute(上海交通大学四川研究院);Jinping Deep Underground Frontier Science and Dark Matter Key Laboratory of Sichuan Province(四川省深地前沿科学与暗物质重点实验室);Yalong River Hydropower Development Company, Ltd.(雅砻江流域水电开发有限公司)
Search for Diffuse Supernova Neutrino Background of All Flavors with PandaX-4T
Research Center for Particle Science and Technology, Institute of Frontier and Interdisciplinary Science, Shandong University(山东大学前沿交叉科学研究院粒子科学与技术研究中心);Key Laboratory of Particle Physics and Particle Irradiation of the Ministry of Education, Shandong University(山东大学教育部粒子物理与粒子辐照重点实验室);State Key Laboratory of Dark Matter Physics, Key Laboratory for Particle Astrophysics and Cosmology (MoE), Shanghai Key Laboratory for Particle Physics and Cosmology, School of Physics and Astronomy, Shanghai Jiao Tong University(上海交通大学物理与天文学院暗物质物理全国重点实验室粒子天体物理与宇宙学教育部重点实验室上海市粒子物理与宇宙学重点实验室);New Cornerstone Science Laboratory, Tsung-Dao Lee Institute, Shanghai Jiao Tong University(上海交通大学新Cornerstone科学实验室汤川秀树研究所);Shanghai Jiao Tong University Sichuan Research Institute(上海交通大学四川研究院)
Evidence of Coherent Elastic Neutrino-Nucleus Scattering with COHERENT's Germanium Array
Washington & Jefferson College(华盛顿与杰斐逊学院);Seoul National University(首尔大学);Duke University(杜克大学);Triangle Universities Nuclear Laboratory(三角大学核实验室);National Research Nuclear University MEPhI (Moscow Engineering Physics Institute)(莫斯科工程物理国立研究大学);National Research Center “Kurchatov Institute”(库尔恰托夫研究所国家研究中心);University of Tennessee, Knoxville(田纳西大学诺克斯维尔分校);University of South Dakota(南达科他大学);North Carolina State University(北卡罗来纳州立大学);Sandia National Laboratories(桑迪亚国家实验室)
Measurement of coherent elastic neutrino nucleus scattering on germanium by COHERENT
University of South Dakota(南达科他大学);Seoul National University(首尔大学);Florida State University(佛罗里达州立大学);Duke University(杜克大学);Triangle Universities Nuclear Laboratory(三角大学核实验室);National Research Nuclear University MEPhI (Moscow Engineering Physics Institute)(国立研究核大学莫斯科工程物理学院);National Research Center “Kurchatov Institute”(库尔恰托夫国家研究中心);University of Tennessee(田纳西大学);Los Alamos National Laboratory(洛斯阿拉莫斯国家实验室)
Coherent elastic neutrino-nucleus scattering on 40Ar from first principles
基于量子色动力学有效场论中的核哈密顿量,采用耦合集团理论计算了中微子在40 Ar核上的相干弹性散射.通过计算电荷形状因子并将其与电子散射数据进行比较,验证了我们的方法。我们预测的弱形状因子,中子半径,和中子皮,并估计系统的不确定性。40 Ar 40的中子皮厚度与密度泛函理论的结果一致。从相干弹性中微子核散射的精确测量可能被用来提取这些可观的,并帮助约束核模型。
Coherent elastic neutrino-nucleus scattering in multi-ton scale dark matter experiments: Classification of vector and scalar interactions new physics signals
First results of the nuGeN experiment on coherent elastic neutrino-nucleus scattering
nuGeN实验的目的是利用加里宁核电站反应堆中的反中微子来研究中微子的性质。实验装置位于距离3.1 GWth反应堆堆芯中心约11米处。用低能阈高纯锗探测器探测反应堆的反中微子散射。被动和主动屏蔽用于抑制来自周围物质和宇宙辐射的各种背景。的实验装置连同第一个结果的描述。比较了反应堆开启(94.50天)和反应堆关闭(47.09天)时的数据。两个数据集的光谱之间没有显着差异,即没有检测到相干弹性中微子-核散射的正信号。在相干中微子散射的标准模型假设下,给出了猝灭参数k <0.26(90 C. L.)在锗中已经被设置。
Coherent Elastic Neutrino-Nucleus Scattering at the Japan Proton Accelerator Research Complex
University of Chicago(芝加哥大学);Donostia International Physics Center(圣塞巴斯蒂安国际物理中心);Ikerbasque, Basque Foundation for Science(伊克尔巴斯基,巴斯克科学基金会);University of the Basque Country UPV/EHU(巴斯克地区大学);Universitat de Barcelona(巴塞罗那大学);Institució Catalana de Recerca i Estudis Avancats (ICREA)(加泰罗尼亚研究与高等学院);Stony Brook University(石溪大学)
Measuring Active-to-Sterile Neutrino Oscillations with Neutral Current Coherent Neutrino-Nucleus Scattering
轻无菌中微子已经被引入,作为$Δm^2 \sim 1$ eV $^2$处的许多振荡信号的解释。在相对较短的基线上的中微子振荡提供了对这些可能的新状态的探测。本文描述了一个基于加速器的实验,利用中性流相干中微子-核散射来严格搜索活跃到无菌的中微子振荡。因此,这个实验可以明确地确定无菌中微子的存在,并对它们的混合参数提供限制。基于回旋加速器的质子束可以被引导到多个目标,产生低能π介子和μ介子衰变静止中微子源,与单个检测器的距离可变。两种类型的探测器被认为是:基于锗的探测器的灵感来自CDMS的设计和液氩探测器的灵感来自拟议的CLEAR实验。
Distillation of scalar exchange by coherent hypernucleus production in antiproton-nucleus collisions
本文用束缚质子和$Λ$ -超子波函数的介子交换模型计算了束流动量为$1.5\div20$ GeV/c时相干过程$\bar p + {}^AZ \to {}^A_Λ(Z-1) + \barΛ$的总微分截面和角微分截面。结果表明,具有不同离散$Λ$态的超核产生截面的束流动量依赖关系的形状对$\bar p p \to \barΛΛ$振幅中标量$κ$ -介子交换的存在非常敏感.这可用作通过相干$\bar p A$反应中的标量$πK$相关性的交换的干净测试。