Search for inelastic scattering of WIMP dark matter in XENON1T
XENON Collaboration, E. Aprile, J. Aalbers, F. Agostini, M. Alfonsi, L. Althueser, F. D. Amaro, S. Andaloro, E. Angelino, J. R. Angevaare, V. C. Antochi, F. Arn… 展开作者
XENON Collaboration, E. Aprile, J. Aalbers, F. Agostini, M. Alfonsi, L. Althueser, F. D. Amaro, S. Andaloro, E. Angelino, J. R. Angevaare, V. C. Antochi, F. Arneodo, L. Baudis, B. Bauermeister, L. Bellagamba, M. L. Benabderrahmane, A. Brown, E. Brown, S. Bruenner, G. Bruno, R. Budnik, C. Capelli, J. M. R. Cardoso, D. Cichon, B. Cimmino, M. Clark, D. Coderre, A. P. Colijn, J. Conrad, J. Cuenca, J. P. Cussonneau, M. P. Decowski, A. Depoian, P. Di Gangi, A. Di Giovanni, R. Di Stefano, S. Diglio, A. Elykov, A. D. Ferella, W. Fulgione, P. Gaemers, R. Gaior, M. Galloway, F. Gao, L. Grandi, C. Hils, K. Hiraide, L. Hoetzsch, J. Howlett, M. Iacovacci, Y. Itow, F. Joerg, N. Kato, S. Kazama, M. Kobayashi, G. Koltman, A. Kopec, H. Landsman, R. F. Lang, L. Levinson, S. Liang, Q. Lin, S. Lindemann, M. Lindner, F. Lombardi, J. Long, J. A. M. Lopes, Y. Ma, C. Macolino, J. Mahlstedt, A. Mancuso, L. Manenti, A. Manfredini, F. Marignetti, T. Marrodán Undagoitia, K. Martens, J. Masbou, D. Masson, S. Mastroianni, M. Messina, K. Miuchi, K. Mizukoshi, A. Molinario, K. Morå, S. Moriyama, Y. Mosbacher, M. Murra, J. Naganoma, K. Ni, U. Oberlack, K. Odgers, J. Palacio, B. Pelssers, R. Peres, J. Pienaar, M. Pierre, V. Pizzella, G. Plante, J. Qi, J. Qin, D. Ramírez García, S. Reichard, A. Rocchetti, N. Rupp, J. M. F. dos Santos, G. Sartorelli, N. Šarčević, M. Scheibelhut, J. Schreiner, D. Schulte, H. Schulze Eißing, M. Schumann, L. Scotto Lavina, M. Selvi, F. Semeria, P. Shagin, E. Shockley, M. Silva, H. Simgen, A. Takeda, C. Therreau, D. Thers, F. Toschi, G. Trinchero, C. Tunnell, K. Valerius, M. Vargas, G. Volta, Y. Wei, C. Weinheimer, M. Weiss, D. Wenz, C. Wittweg, T. Wolf, Z. Xu, M. Yamashita, J. Ye, G. Zavattini, Y. Zhang, T. Zhu, J. P. Zopounidis
We report the results of a search for the inelastic scattering of weakly interacting massive particles (WIMPs) in the XENON1T dark matter experiment. Scattering off $^{129}$Xe is the most sensitive probe of inelastic WIMP interactions, with a signature of a 39.6 keV de-excitation photon detected simultaneously with the nuclear recoil. Using an exposure of 0.89 tonne-years, we find no evidence of inelastic WIMP scattering with a significance of more than 2$σ$. A profile-likelihood ratio analysis is used to set upper limits on the cross-section of WIMP-nucleus interactions. We exclude new parameter space for WIMPs heavier than 100 GeV/c${}^2$, with the strongest upper limit of $3.3 \times 10^{-39}$ cm${}^2$ for 130 GeV/c${}^2$ WIMPs at 90\% confidence level.
A search for Weakly Interacting Massive Particles (WIMPs) was conducted with the single-phase liquid-xenon detector XMASS through inelastic scattering in which $^{129}$Xe nuclei were excited, using an exposure ($\rm 327\; kg \times 800.0 \; days$) 48 times larger than that of our previous study. The inelastic excitation sensitivity was improved by detailed evaluation of background, event classification based on scintillation timing that distinguished $γ$-rays and $β$-rays, and simultaneous fitting of the energy spectra of $γ$-like and $β$-like samples. No evidence of a WIMP signal was found. T…
Search for inelastic WIMP nucleus scattering on $^{129}$Xe in data from the XMASS-I experiment
本文利用神冈天文台的XMASS单相液体氙探测器所获得的数据,研究了弱相互作用大质量粒子(WIMPs)在同位素$^{129}$上的非弹性散射。在我们的探测器的正中心使用包含41 kg LIPO4的受限体积,我们在165.9天的数据中没有观察到显著的过量事件。我们的背景减少使我们能够得到我们的限制,而不明确减去其余的事件是兼容的背景预期,并得出,例如,50 GeV的弱相互作用的上限,其非弹性截面的$^{129}$在90%的置信水平上的pb。
We present the first constraints on the spin-dependent, inelastic scattering cross section of Weakly Interacting Massive Particles (WIMPs) on nucleons from XENON100 data with an exposure of 7.64$\times$10$^3$\,kg\,day. XENON100 is a dual-phase xenon time projection chamber with 62\,kg of active mass, operated at the Laboratori Nazionali del Gran Sasso (LNGS) in Italy and designed to search for nuclear recoils from WIMP-nucleus interactions. Here we explore inelastic scattering, where a transition to a low-lying excited nuclear state of $^{129}$Xe is induced. The experimental signature is a nuc…
The Cryogenic Dark Matter Search (CDMS) employs Ge and Si detectors to search for WIMPs via their elastic-scattering interactions with nuclei while discriminating against interactions of background particles. CDMS data give limits on the spin-independent WIMP-nucleon elastic-scattering cross-section that exclude unexplored parameter space above 10 GeV c^{-2} WIMP mass and, at > 84% CL, the entire 3$σ$ allowed region for the WIMP signal reported by the DAMA experiment.
We point out a potential common origin of the recently observed 750 GeV diphoton resonance and a Weakly Interacting Massive Particle (WIMP) candidate. In a dark QCD sector with an unbroken dark G-parity, the diphoton resonance could be a dark G-even pion, while the WIMP could be the lightest dark G-odd pion. Both particles are Standard Model gauge singlets and have the same decay constant. For the dark pion decay constant of around 500 GeV, both the diphoton excess at the LHC and the dark matter thermal abundance can be accommodated in our model. Our model predicts additional dark G-even and d…
One of the highest priorities in particle physics today is the identification of the constituents of dark matter. This manuscript is a supplement to pedagogical lectures given at the 2021 Les Houches Summer School on Dark Matter. The lectures cover topics related to the direct detection of WIMP dark matter, including the distribution of dark matter, nuclear scattering, backgrounds, planning and designing of experiments and a sampling of planned and ongoing experiments.
Dark matter in the solar system II: WIMP annihilation rates in the Sun
我们计算了太阳中弱相互作用大质量粒子(WIMP)的湮灭率随其质量和弹性散射截面的变化。湮灭的副产品之一,μ子中微子,可能会被下一代中微子望远镜观测到。先前对湮灭率的估计假设来自银河系暗晕的任何WIMP被太阳核的弹性散射捕获,并在太阳中迅速达到热平衡。我们表明,太阳的光学深度WIMP和行星的引力都有助于降低湮灭率低于这些估计。虽然我们发现,即将到来的km^3级中微子望远镜对~100 GeV WIMP的灵敏度与之前的估计几乎没有变化,但这些实验对~10 TeV WIMP的灵敏度可能比标准计算所建议的要低一个数量级。湮灭率的新估计将指导未来的实验设计,并改善从中微子事件率到WIMP参数空间的映射。
DARWIN: dark matter WIMP search with noble liquids
DARWIN(用惰性液体进行暗物质弱相互作用探测)是欧洲下一代多吨级暗物质探测器的设计研究。液态氩和/或液态氙是直接探测大质量弱相互作用粒子(WIMP)形式的暗物质候选者的目标介质。通过时间投影室技术观察由活性检测器体积中的粒子相互作用产生的光和电荷信号。DARWIN将探测1 e-48 cm 2以下与自旋无关的WIMP-核子截面,并测量具有高统计数据的WIMP诱导核反冲谱,如果它们被现有或不久的将来的实验发现的话。在一个简短的介绍之后,我将描述项目,选择的研发主题,预期的背景和物理范围。
We propose a new mechanism where asymmetric dark matter (ADM) and the baryon asymmetry are both generated in the same decay chain of a metastable weakly interacting massive particle (WIMP) after its thermal freeze-out. Dark matter and baryons are connected by a generalized baryon number that is conserved, while the DM asymmetry and baryon asymmetry compensate each other. This unified framework addresses the DM-baryon coincidence while inheriting the merit of the conventional WIMP miracle in predicting relic abundances of matter. Examples of renormalizable models realizing this scenario are pre…
In this paper, we revisit the expressions for the (double) differential event rates for elastic WIMP-nucleus scattering and discuss some unusual thoughts on (the incompleteness of) the uses of these expressions in (directional) direct Dark Matter detection physics. Several not-frequently mentioned (but important) issues will be argued and demonstrated in detail.
DARWIN: dark matter WIMP search with noble liquids
DARWIN(DARk matter WImp search with Noble liquids)是一项研发和设计研究,旨在实现欧洲的多吨级暗物质搜索设施,基于液态氩和液态氙时间投影室技术。DARWIN于2009年底获得ASPERA的批准,汇集了几个欧洲和美国的团队,致力于现有的ArDM,XENON和WARP实验,目标是在2013年初为该设施提供技术设计报告。DARWIN将被设计用于探测10- 47 cm ^2以下的自旋无关的WIMP-核子截面区域,并在其间的几年中探测到阳性的情况下提供WIMP相互作用的高统计测量。在简要介绍之后,将介绍DARWIN的目标、组成部分以及预期的物理范围。
Multiple astrophysical and cosmological observations show that the majority of the matter in the universe is non-luminous. It is not made of known particles, and it is called dark matter. This is one of the few pieces of concrete experimental evidence of new physics beyond the Standard Model. Despite decades of effort, we still know very little about the identity of dark matter; it remains one of the biggest outstanding mysteries facing particle physics. Among the numerous proposals to explain its nature, the Weakly Interacting Massive Particle (WIMP) scenario stands out. The WIMP scenario is …
Limits on spin-independent WIMP-nucleon interactions from the two-tower run of the Cryogenic Dark Matter Search
我们报告了苏丹地下实验室低温暗物质搜寻(CDMS II)的新结果。两个塔,每个由6个探测器组成,运行了74.5个工作日,在切割后,锗的光谱加权曝光量为34 kg-d,硅靶的光谱加权曝光量为12 kg-d,平均反冲能量为10-100 keV,WIMP质量为60 GeV。进行了盲分析,结合了拒绝表面事件的改进技术。未观察到超过预期背景的WIMP信号。当结合我们以前的结果从苏丹,90%的C. L。对于60 GeV的WIMP质量,自旋无关的WIMP-核子截面的上限是Ge为1.6 x 10^{-43} cm ^2,Si为3 x 10^{-42} cm ^2。Ge(Si)的组合极限比我们以前的结果低2.5(10)倍,并限制了超对称模型的预测。
In this article, as an extension of our study on the angular distribution of the recoil flux of WIMP-scattered target nuclei, we demonstrate a possibility of determining the mass of incident halo WIMPs by using or combining "ridge-crater" structures of the angular recoil-energy spectra with different target nuclei observed in directional direct Dark Matter detection experiments. Our simulation results show that, for a WIMP mass of only a few tens GeV, the stereoscopic angular recoil-flux distributions of both of light and heavy target nuclei would have a (longitudinally) "ridge-like" structure…
Effects of Residue Background Events in Direct Dark Matter Detection Experiments on the Reconstruction of the Velocity Distribution Function of Halo WIMPs