Probing the Scalar WIMP-Pion Coupling with the first LUX-ZEPLIN data
J. Aalbers, D. S. Akerib, A. K. Al Musalhi, F. Alder, C. S. Amarasinghe, A. Ames, T. J. Anderson, N. Angelides, H. M. Araújo, J. E. Armstrong, M. Arthurs, A. Ba… 展开作者
J. Aalbers, D. S. Akerib, A. K. Al Musalhi, F. Alder, C. S. Amarasinghe, A. Ames, T. J. Anderson, N. Angelides, H. M. Araújo, J. E. Armstrong, M. Arthurs, A. Baker, S. Balashov, J. Bang, E. E. Barillier, J. W. Bargemann, K. Beattie, T. Benson, A. Bhatti, A. Biekert, T. P. Biesiadzinski, H. J. Birch, E. J. Bishop, G. M. Blockinger, B. Boxer, C. A. J. Brew, P. Brás, S. Burdin, M. Buuck, M. C. Carmona-Benitez, M. Carter, A. Chawla, H. Chen, J. J. Cherwinka, Y. T. Chin, N. I. Chott, M. V. Converse, A. Cottle, G. Cox, D. Curran, C. E. Dahl, A. David, J. Delgaudio, S. Dey, L. deViveiros, L. DiFelice, C. Ding, J. E. Y. Dobson, E. Druszkiewicz, S. R. Eriksen, A. Fan, N. M. Fearon, S. Fiorucci, H. Flaecher, E. D. Fraser, T. M. A. Fruth, R. J. Gaitskell, A. Geffre, J. Genovesi, C. Ghag, R. Gibbons, S. Gokhale, J. Green, M. G. D. vanderGrinten, J. J. Haiston, C. R. Hall, S. Han, E. Hartigan-O'Connor, S. J. Haselschwardt, M. A. Hernandez, S. A. Hertel, G. Heuermann, G. J. Homenides, M. Horn, D. Q. Huang, D. Hunt, E. Jacquet, R. S. James, J. Johnson, A. C. Kaboth, A. C. Kamaha, M. Kannichankandy, D. Khaitan, A. Khazov, I. Khurana, J. DKim, J. Kim, J. Kingston, R. Kirk, D. Kodroff, L. Korley, E. V. Korolkova, H. Kraus, S. Kravitz, L. Kreczko, V. A. Kudryavtsev, D. S. Leonard, K. T. Lesko, C. Levy, J. Lin, A. Lindote, R. Linehan, W. H. Lippincott, M. I. Lopes, W. Lorenzon, C. Lu, S. Luitz, P. A. Majewski, A. Manalaysay, R. L. Mannino, C. Maupin, M. E. McCarthy, G. McDowell, D. N. McKinsey, J. McLaughlin, J. B. McLaughlin, R. McMonigle, E. H. Miller, E. Mizrachi, A. Monte, M. E. Monzani, J. D. Morales Mendoza, E. Morrison, B. J. Mount, M. Murdy, A. St. J. Murphy, A. Naylor, H. N. Nelson, F. Neves, A. Nguyen, J. A. Nikoleyczik, I. Olcina, K. C. Oliver-Mallory, J. Orpwood, K. J. Palladino, J. Palmer, N. J. Pannifer, N. Parveen, S. J. Patton, B. Penning, G. Pereira, E. Perry, T. Pershing, A. Piepke, Y. Qie, J. Reichenbacher, C. A. Rhyne, Q. Riffard, G. R. C. Rischbieter, H. S. Riyat, R. Rosero, T. Rushton, D. Rynders, D. Santone, A. B. M. R. Sazzad, R. W. Schnee, S. Shaw, T. Shutt, J. J. Silk, C. Silva, G. Sinev, J. Siniscalco, R. Smith, V. N. Solovov, P. Sorensen, J. Soria, I. Stancu, A. Stevens, K. Stifter, B. Suerfu, T. J. Sumner, M. Szydagis, W. C. Taylor, D. R. Tiedt, M. Timalsina, Z. Tong, D. R. Tovey, J. Tranter, M. Trask, M. Tripathi, D. R. Tronstad, A. Vacheret, A. C. Vaitkus, O. Valentino, V. Velan, A. Wang, J. J. Wang, Y. Wang, J. R. Watson, R. C. Webb, L. Weeldreyer, T. J. Whitis, M. Williams, W. J. Wisniewski, F. L. H. Wolfs, S. Woodford, D. Woodward, C. J. Wright, Q. Xia, X. Xiang, J. Xu, M. Yeh, E. A. Zweig
Weakly interacting massive particles (WIMPs) may interact with a virtual pion that is exchanged between nucleons. This interaction channel is important to consider in models where the spin-independent isoscalar channel is suppressed. Using data from the first science run of the LUX-ZEPLIN dark matter experiment, containing 60 live days of data in a 5.5~tonne fiducial mass of liquid xenon, we report the results on a search for WIMP-pion interactions. We observe no significant excess and set an upper limit of $1.5\times10^{-46}$~cm$^2$ at a 90\% confidence level for a WIMP mass of 33~GeV/c$^2$ for this interaction.
High Energy Physics experiments like the LUX-ZEPLIN dark matter experiment face unique challenges when running their computation on High Performance Computing resources. In this paper, we describe some strategies to optimize memory usage of simulation codes with the help of profiling tools. We employed this approach and achieved memory reduction of 10-30\%. While this has been performed in the context of the LZ experiment, it has wider applicability to other HEP experimental codes that face these challenges on modern computer architectures.
Elastic neutrino-electron scattering represents a powerful tool to investigate key neutrino properties. In view of the recent results released by the LUX-ZEPLIN collaboration, we provide a first determination of the limits achievable on the neutrino magnetic moment and neutrino millicharge, whose effect becomes non-negligible in some beyond the Standard Model theories. In this context, we evaluate and discuss the impact of different approximations to describe the neutrino interaction with atomic electrons. The new LUX-ZEPLIN data allows us to set a very competitive limit on the neutrino magnet…
我们在这里报告的结果，从弱相互作用大质量粒子（WIMP）的搜索与LUX暗物质实验。LUX是一个有效质量为250 kg的两相氙时间投影室（TPC），已于2012年至2016年运行。在操作过程中，我们没有观察到WIMP弹性散射事件的证据。LUX在两个WIMP-核子自旋无关截面上都达到了最严格的极限（对于50 GeV/c ${}^{2}$，90% C. L.，1.1 $\times{10}^{-46}$ cm $^2$）。和WIMP-中子自旋相关截面（35 GeV/c ${}^{2}$，1.6 $\times{10}^{-41}$ cm $^2$，90% C. L.）。
Interpreting the High-Recoil LUX-ZEPLIN Event with Bino-/Singlino-like and Higgsino Dark Matter
Argonne National Laboratory（阿贡国家实验室）；University of Cincinnati（辛辛那提大学）；Johannes Gutenberg University（约翰内斯·古腾堡大学）；University of Chicago（芝加哥大学）；Perimeter Institute for Theoretical Physics（理论物理珀米特研究所）
Inelastic Self-interacting Dark Matter and LUX-ZEPLIN 248 keV Event in a Dirac Modular Inverse Seesaw
Salbari College（萨尔巴里学院）；University of Silesia（西里西亚大学）；Indian Institute of Technology Goa（印度理工学院果阿分校）；Indian Institute of Technology Hyderabad（印度理工学院海德拉巴分校）
A scalar-extended ${\rm U(1)_{L_μ-L_τ}}$ explanation of the LUX-ZEPLIN 248 keV excess
Institute of Physics（印度物理研究所）；Homi Bhabha National Institute, BARC Training School Complex（霍米·巴巴国立学院，BARC培训学院）；Laboratoire de Physique Subatomique et de Cosmologie, Université Grenoble-Alpes, CNRS/IN2P3（法国格勒诺布尔阿尔卑斯大学亚原子物理与宇宙学实验室）
Kaluza--Klein Dark-Photon Mediation of Inelastic Dark Matter at LUX-ZEPLIN
Center for Fundamental Physics, School of Artificial Intelligence, Hubei Polytechnic University（湖北理工学院人工智能学院基础物理中心）；Physics Department, Theory Division, University of Ioannina（伊奥尼纳大学理论部物理系）
The Present and Future of Searching for Dark Matter with LUX and LZ
LUX合作的新结果推进了对4 GeV/c^2及更高质量范围内暗物质候选粒子的搜索，最大自旋无关性为90% C. L。在2015年12月重新分析其最初95个存活日的WIMP搜索数据后，在33 GeV/c^2质量下的6 x 10 ^-46 cm ^2截面之后，在50 GeV/c^2的332个存活日运行中的极限为2 x 10^-46 cm ^2。LUX已经进行了多次先进的原位中子和β/γ光和电荷产率校准，分别下降到1.1和0.7千电子伏，在核反冲能量和1.3和0.2千电子伏的电子反冲能量的单位，从而绕过了过去的做法外推产量从非原位校准或模拟模型单独。在这次会议上，将强调新的校准对低质量WIMP相互作用截面的限制的后果。先前从其他探测器获得的WIMP信号的说法现在更加不受欢迎，假设同位旋不变性和标准的WIMP晕模型。自旋独立和自旋相关的限制将被讨论，包括最近完成的LUX的332天的盲运行。最后，我们重点介绍了其10吨级下一代继任者LZ的概念设计和未来计划，该计划计划对质量为40 GeV/c^2的WIMP实现< 3 x 10^-48 cm ^2的灵敏度。
Precision measurement of positron decay modes of Xe-125 in the LUX-ZEPLIN experiment
SLAC National Accelerator Laboratory（SLAC国家加速器实验室）；Kavli Institute for Particle Astrophysics and Cosmology, Stanford University（斯坦福大学卡弗里粒子天体物理与宇宙学研究所）；University College London (UCL)（伦敦大学学院）；Brown University（布朗大学）；University of California, Santa Barbara（加州大学圣塔芭芭拉分校）；University of Zurich（苏黎世大学）；Imperial College London（帝国理工学院）；STFC Rutherford Appleton Laboratory (RAL)（STC鲁瑟福阿普尔顿实验室）；University of Maryland（马里兰大学）
Measurement of the Muon Flux at the Sanford Underground Research Facility with the LUX-ZEPLIN Dark Matter Detector
SLAC National Accelerator Laboratory（SLAC国家加速器实验室）；Kavli Institute for Particle Astrophysics and Cosmology, Stanford University（斯坦福大学卡弗里粒子天体物理与宇宙学研究所）；University College London（伦敦大学学院）；Brown University（布朗大学）；University of California, Santa Barbara（加利福尼亚大学圣巴巴拉分校）；University of Zurich（苏黎世大学）；Imperial College London（帝国理工学院）；STFC Rutherford Appleton Laboratory（STFC卢瑟福·阿普尔顿实验室）；University of Maryland（马里兰大学）
The LUX-ZEPLIN dark matter search aims to achieve a sensitivity to the WIMP-nucleon spin-independent cross-section down to (1--2)$\times10^{-12}$\,pb at a WIMP mass of 40 GeV/$c^2$. This paper describes the simulations framework that, along with radioactivity measurements, was used to support this projection, and also to provide mock data for validating reconstruction and analysis software. Of particular note are the event generators, which allow us to model the background radiation, and the detector response physics used in the production of raw signals, which can be converted into digitized …
Search for dark matter particle interactions in an extended nuclear recoil energy window with the LUX-ZEPLIN (LZ) experiment
SLAC National Accelerator Laboratory（斯坦福直线加速器中心）；Kavli Institute for Particle Astrophysics and Cosmology, Stanford University（斯坦福大学卡弗里粒子天体物理与宇宙学研究所）；University College London (UCL)（伦敦大学学院）；Brown University（布朗大学）；University of California, Santa Barbara（加州大学圣塔芭芭拉分校）；Lawrence Berkeley National Laboratory (LBNL)（劳伦斯伯克利国家实验室）；University of Zurich（苏黎世大学）；Imperial College London（帝国理工学院）；STFC Rutherford Appleton Laboratory (RAL)（英国科学与技术设施委员会卢瑟福阿普尔顿实验室）；University of Maryland（马里兰大学）；King’s College London（伦敦国王学院）
Searches for Light Dark Matter and Evidence of Coherent Elastic Neutrino-Nucleus Scattering of Solar Neutrinos with the LUX-ZEPLIN (LZ) Experiment
SLAC National Accelerator Laboratory（斯坦福直线加速器中心）；Kavli Institute for Particle Astrophysics and Cosmology, Stanford University（卡弗里粒子天体物理与宇宙学研究所，斯坦福大学）；University College London (UCL)（伦敦大学学院）；Brown University（布朗大学）；University of California, Santa Barbara（加州大学圣塔芭芭拉分校）；University of Zurich（苏黎世大学）；Imperial College London（帝国理工学院）；STFC Rutherford Appleton Laboratory (RAL)（STFC鲁瑟福阿普尔顿实验室）；University of Maryland（马里兰大学）
We present a novel analysis technique for liquid xenon time projection chambers that allows for a lower threshold by relying on events with a prompt scintillation signal consisting of single detected photons. The energy threshold of the LUX dark matter experiment is primarily determined by the smallest scintillation response detectable, which previously required a 2-fold coincidence signal in its photomultiplier arrays, enforced in data analysis. The technique presented here exploits the double photoelectron emission effect observed in some photomultiplier models at vacuum ultraviolet waveleng…
LUX-ZEPLIN (LZ) is a next generation dark matter direct detection experiment that will operate 4850 feet underground at the Sanford Underground Research Facility (SURF) in Lead, South Dakota, USA. Using a two-phase xenon detector with an active mass of 7~tonnes, LZ will search primarily for low-energy interactions with Weakly Interacting Massive Particles (WIMPs), which are hypothesized to make up the dark matter in our galactic halo. In this paper, the projected WIMP sensitivity of LZ is presented based on the latest background estimates and simulations of the detector. For a 1000~live day ru…
Study of few-electron backgrounds in the LUX-ZEPLIN detector
SLAC National Accelerator Laboratory（斯坦福直线加速器中心）；Kavli Institute for Particle Astrophysics and Cosmology, Stanford University（斯坦福大学卡弗里粒子天体物理与宇宙学研究所）；University College London (UCL)（伦敦大学学院）；Brown University（布朗大学）；University of California, Santa Barbara（加州大学圣塔芭芭拉分校）；Imperial College London（帝国理工学院）；STFC Rutherford Appleton Laboratory (RAL)（英国科学与技术设施委员会卢瑟福阿普尔顿实验室）；University of Maryland（马里兰大学）
LUX-ZEPLIN (LZ) is a dark matter detector expected to obtain world-leading sensitivity to weakly interacting massive particles (WIMPs) interacting via nuclear recoils with a ~7-tonne xenon target mass. This manuscript presents sensitivity projections to several low-energy signals of the complementary electron recoil signal type: 1) an effective neutrino magnetic moment and 2) an effective neutrino millicharge, both for pp-chain solar neutrinos, 3) an axion flux generated by the Sun, 4) axion-like particles forming the galactic dark matter, 5) hidden photons, 6) mirror dark matter, and 7) lepto…
Results from a search for dark matter in the complete LUX exposure
我们报告的限制自旋独立的弱相互作用大质量粒子（WIMP）核子散射使用3.35e4千克-天的大型地下氙（LUX）实验曝光。在美国南达科他州Lead的Sanford地下研究设施中运行着一个有效质量为250 kg的双相氙时间投影室。相对于我们以前的结果，对高WIMP质量的灵敏度提高了大约四倍，这次搜索没有得到WIMP核反冲的证据。在WIMP质量为50 GeV/c^2时，在90%的置信水平下，排除了大于2.2 e-46 cm ^2的WIMP-核子自旋无关截面。当与先前报道的LUX暴露相结合时，这种排斥在50 GeV/c^2处增强到1.1 e-46 cm ^2。
A Detailed Look at the First Results from the Large Underground Xenon (LUX) Dark Matter Experiment
LUX是世界上最大的双相氙时间投影室，基准目标质量为118公斤，迄今为止的曝光量为10，091公斤-天，是目前最灵敏的直接暗物质搜索实验。自旋无关的WIMP-核子散射截面的初始零结果限制于2013年10月发布，主要闪烁阈值为2 phe，大约为LUX的3 keVnr。该探测器已部署在南达科他州Lead的Sanford地下研究设施（SURF），是第一个实现WIMP横截面低于$10^{-45}$ cm $^{2}$的实验。在这里，我们提出了一个更深入的讨论，以更好地了解核反冲光和电荷产率的新的能量尺度，和校准源，包括新的内部氚源。我们发现LUX数据与其他结果的低质量WIMP信号解释相冲突。
We estimate the amount of $^{37}$Ar produced in natural xenon via cosmic ray-induced spallation, an inevitable consequence of the transportation and storage of xenon on the Earth's surface. We then calculate the resulting $^{37}$Ar concentration in a 10-tonne payload~(similar to that of the LUX-ZEPLIN experiment) assuming a representative schedule of xenon purification, storage and delivery to the underground facility. Using the spallation model by Silberberg and Tsao, the sea level production rate of $^{37}$Ar in natural xenon is estimated to be 0.024~atoms/kg/day. Assuming the xenon is succe…
We describe the design and assembly of the LUX-ZEPLIN experiment, a direct detection search for cosmic WIMP dark matter particles. The centerpiece of the experiment is a large liquid xenon time projection chamber sensitive to low energy nuclear recoils. Rejection of backgrounds is enhanced by a Xe skin veto detector and by a liquid scintillator Outer Detector loaded with gadolinium for efficient neutron capture and tagging. LZ is located in the Davis Cavern at the 4850' level of the Sanford Underground Research Facility in Lead, South Dakota, USA. We describe the major subsystems of the experi…
LUX-ZEPLIN (LZ) is a second-generation direct dark matter experiment with spin-independent WIMP-nucleon scattering sensitivity above $1.4 \times 10^{-48}$ cm$^{2}$ for a WIMP mass of 40 GeV/c$^{2}$ and a 1000 d exposure. LZ achieves this sensitivity through a combination of a large 5.6 t fiducial volume, active inner and outer veto systems, and radio-pure construction using materials with inherently low radioactivity content. The LZ collaboration performed an extensive radioassay campaign over a period of six years to inform material selection for construction and provide an input to the exper…
This work details the development of a three-dimensional (3D) electric field model for the LUX detector. The detector took data during two periods of searching for weakly interacting massive particle (WIMP) searches. After the first period completed, a time-varying non-uniform negative charge developed in the polytetrafluoroethylene (PTFE) panels that define the radial boundary of the detector's active volume. This caused electric field variations in the detector in time, depth and azimuth, generating an electrostatic radially-inward force on electrons on their way upward to the liquid surface…
