Search for Boosted Dark Matter Interacting with Electrons in Super-Kamiokande.
Search for Boosted Dark Matter Interacting with Electrons in Super-Kamiokande.
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DOI：
10.1103/physrevlett.120.221301
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发表时间：
2017-11
影响因子：
8.6
通讯作者：
C. Kachulis;K. Abe;K. Abe;C. Bronner;Y. Hayato;Y. Hayato;M. Ikeda;K. Iyogi;J. Kameda;J. K
中科院分区：
文献类型：
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作者：
C. Kachulis;K. Abe;K. Abe;C. Bronner;Y. Hayato;Y. Hayato;M. Ikeda;K. Iyogi;J. Kameda;J. K
使用161.9千吨年的超级神冈IV数据的搜索助推暗物质。我们在大气中微子背景之上寻找过量的弹性散射电子，其可见能量在100 MeV和1 TeV之间，指向银河系中心或太阳。未观察到此类过量。计算了银河系中心和太阳周围多个角锥中暗物质事件发生率的极限。极限也计算了基线模型的提升暗物质产生的冷暗物质湮灭或衰变。这是第一次对来自银河系中心或太阳的增强暗物质在地面探测器中相互作用的实验性搜索。
A search for boosted dark matter using 161.9 kt yr of Super-Kamiokande IV data is presented. We search for an excess of elastically scattered electrons above the atmospheric neutrino background, with a visible energy between 100 MeV and 1 TeV, pointing back to the Galactic center or the Sun. No such excess is observed. Limits on boosted dark matter event rates in multiple angular cones around the Galactic center and Sun are calculated. Limits are also calculated for a baseline model of boosted dark matter produced from cold dark matter annihilation or decay. This is the first experimental search for boosted dark matter from the Galactic center or the Sun interacting in a terrestrial detector.