Indirect dark matter searches in the dwarf satellite galaxy Ursa Major II with the MAGIC Telescopes
MAGIC Collaboration, M. L. Ahnen, S. Ansoldi, L. A. Antonelli, C. Arcaro, D. Baack, A. Babić, B. Banerjee, P. Bangale, U. Barres de Almeida, J. A. Barrio, J. Be… 展开作者
MAGIC Collaboration, M. L. Ahnen, S. Ansoldi, L. A. Antonelli, C. Arcaro, D. Baack, A. Babić, B. Banerjee, P. Bangale, U. Barres de Almeida, J. A. Barrio, J. Becerra González, W. Bednarek, E. Bernardini, R. Ch. Berse, A. Berti, W. Bhattacharyya, A. Biland, O. Blanch, G. Bonnoli, R. Carosi, A. Carosi, G. Ceribella, A. Chatterjee, S. M. Colak, P. Colin, E. Colombo, J. L. Contreras, J. Cortina, S. Covino, P. Cumani, P. Da Vela, F. Dazzi, A. De Angelis, B. De Lotto, M. Delfino, J. Delgado, F. Di Pierro, A. Domínguez, D. Dominis Prester, D. Dorner, M. Doro, S. Einecke, D. Elsaesser, V. Fallah Ramazani, A. Fernández-Barral, D. Fidalgo, M. V. Fonseca, L. Font, C. Fruck, D. Galindo, R. J. García López, M. Garczarczyk, M. Gaug, P. Giammaria, N. Godinović, D. Gora, D. Guberman, D. Hadasch, A. Hahn, T. Hassan, M. Hayashida, J. Herrera, J. Hose, D. Hrupec, K. Ishio, Y. Konno, H. Kubo, J. Kushida, D. Kuveždić, D. Lelas, E. Lindfors, S. Lombardi, F. Longo, M. López, C. Maggio, P. Majumdar, M. Makariev, G. Maneva, M. Manganaro, K. Mannheim, L. Maraschi, M. Mariotti, M. Martínez, S. Masuda, D. Mazin, K. Mielke, M. Minev, J. M. Miranda, R. Mirzoyan, A. Moralejo, V. Moreno, E. Moretti, T. Nagayoshi, V. Neustroev, A. Niedzwiecki, M. Nievas Rosillo, C. Nigro, K. Nilsson, D. Ninci, K. Nishijima, K. Noda, L. Nogués, S. Paiano, J. Palacio, D. Paneque, R. Paoletti, J. M. Paredes, G. Pedaletti, M. Peresano, M. Persic, P. G. Prada Moroni, E. Prandini, I. Puljak, J. R. Garcia, I. Reichardt, W. Rhode, M. Ribó, J. Rico, C. Righi, A. Rugliancich, T. Saito, K. Satalecka, T. Schweizer, J. Sitarek, I. Šnidarić, D. Sobczynska, A. Stamerra, M. Strzys, T. Surić, M. Takahashi, L. Takalo, F. Tavecchio, P. Temnikov, T. Terzić, M. Teshima, N. Torres-Albà, A. Treves, S. Tsujimoto, G. Vanzo, M. Vazquez Acosta, I. Vovk, J. E. Ward, M. Will, D. Zarić
The dwarf spheroidal galaxy Ursa Major II (UMaII) is believed to be one of the most dark-matter dominated systems among the Milky Way satellites and represents a suitable target for indirect dark matter (DM) searches. The MAGIC telescopes carried out a deep observation campaign on UMaII between 2014 and 2016, collecting almost one hundred hours of good-quality data. This campaign enlarges the pool of DM targets observed at very high energy (E$\gtrsim$50GeV) in search for signatures of dark matter annihilation in the wide mass range between $\sim$100 GeV and $\sim$100 TeV. To this end, the data are analyzed with the full likelihood analysis, a method based on the exploitation of the spectral information of the recorded events for an optimal sensitivity to the explored dark matter models. We obtain constraints on the annihilation cross-section for different channels that are among the most robust and stringent achieved so far at the TeV mass scale from observations of dwarf satellite galaxies.
SUSY under siege from direct and indirect WIMP detection experiments
我们通过直接和间接的暗物质搜索实验，研究了在超对称模型中检测WIMP的最新前景。我们研究了几个历史和仍然可行的方案：预测良好的回火中性子（WTN），预测从MasterCode（MC），贝叶斯拟合（BF）和Fittino（FO）的合作，非热wino暗物质（NThW），最后混合轴子higgsino暗物质从超对称性与辐射驱动的自然性（RNS）。由于XENON和LUX合作的最新限制，WTN被排除在外。NThW的情况下，以前在脆弱的地面上，由于伽马线搜索，似乎也排除了最近的结合费米-LAT/MAGIC限制结合新的HESS结果从连续伽马射线。从BF群中排除了MC参数空间和1 TeV higgsino参数空间的大部分。来自RNS的100-300 GeV的类希格斯诺弱相互作用粒子由于其可能的耗尽的局部丰度而幸存下来（在那里轴子可能构成了大部分的暗物质）。吨级稀有液体探测器的预测应该发现或排除这些幸存模型的剩余参数空间的WIMP。
Combined searches for dark matter in dwarf spheroidal galaxies observed with the MAGIC telescopes, including new data from Coma Berenices and Draco
银河系矮球状星系（dSphs）是利用成像大气切伦科夫望远镜寻找暗物质湮灭信号的最佳候选者之一，因为它们具有很高的质光比，而且没有天体物理学上的伽马射线发射源。自2011年以来，MAGIC已经执行了一项为期多年的观测计划，以寻找dSphs中的弱相互作用大质量粒子（WIMP）。Segue 1和Ursa Major II dSphs的观测结果已经发表，其中包括一些最严格的上限（UL）的速度平均横截面$\langle σ_{\mathrm{ann}} v \rangle$的WIMP湮灭dSphs的观测。在这项工作中，我们报告了分别在2018年和2019年用MAGIC望远镜观测到的Draco dSph和Coma Berenices dSph的52.1小时数据的分析。从这些目标中没有检测到信号的提示，并且已经推导出对WIMP候选者的$\langle σ_{\mathrm{ann}} v \rangle$的新约束。为了提高搜索的灵敏度和减少由于$J$ -因子估计的系统不确定性的影响，我们结合了所有dSphs观测的MAGIC望远镜的数据。利用354.3 h的dSphs高质量数据，在$\langle σ_{\mathrm{ann}} v \rangle$上对9个湮灭通道获得了95%的CL UL.对于大多数通道，这些结果在${\sim}1$ TeV时达到了$10^{-24} $ cm $^3$ /s量…
Recasting and Forecasting Dark Matter Limits Without Raw Data: A Generalized Algorithm for Gamma-Ray Telescopes
Institut de Física d’Altes Energies (IFAE), The Barcelona Institute of Science and Technology (BIST)（高能物理研究所，巴塞罗那科学与技术学院）；Department of Physics and Astronomy, University of Padova（帕多瓦大学物理与天文学系）；INFN, Sezione di Padova（意大利国家核物理研究所帕多瓦分部）
Combined dark matter search towards dwarf spheroidal galaxies with Fermi-LAT, HAWC, H.E.S.S., MAGIC, and VERITAS
IRAP, Université de Toulouse, CNRS, UPS, CNES（图卢兹大学 IRAP 研究所）；Università di Pisa and Istituto Nazionale di Fisica Nucleare, Sezione di Pisa（比萨大学及意大利国家核物理研究所比萨分部）；Istituto Nazionale di Fisica Nucleare, Sezione di Pisa（意大利国家核物理研究所比萨分部）；California State University, Los Angeles, Department of Physics and Astronomy（洛杉矶加州大学物理与天文学系）；Dipartimento di Fisica “M. Merlin（马林物理学系）；Politecnico di Bari（巴里理工大学）；Istituto Nazionale di Fisica Nucleare, Sezione di Bari（意大利国家核物理研究所巴里分部）；Istituto Nazionale di Fisica Nucleare, Sezione di Torino（意大利国家核物理研究所都灵分部）；Dipartimento di Fisica, Università degli Studi di Torino（都灵大学物理系）；Laboratoire Leprince-Ringuet, CNRS/IN2P3, École polytechnique, Institut Polytechnique de Paris（巴黎理工学院勒普朗斯-兰格实验室）；Institut für Theoretische Physik and Astrophysik, Universität Würzburg（维尔茨堡大学理论与天体物理研究所）；W. W. Hansen Experimental Physics Laboratory（W.W.汉森实验物理实验室）
