基于 NA64 中 $e^+e^-$ 湮灭对轻质量暗物质的改进排除限
高能物理 - 实验
2021-12-01 v2 高能物理 - 唯象学
摘要
目前，对于通过大质量矢量玻色子 与标准模型耦合的 sub-GeV 暗物质存在的最严格约束，是由 NA64 实验针对 MeV 质量区域设定的。该实验通过分析 个 100-GeV 电子与活性厚靶相互作用的数据，并寻找缺失能量事件来设定约束。在本研究中，通过引入由次级正电子与原子电子湮灭产生 的过程，我们将 200-300 MeV 区域的排除限改善了近一个数量级，首次触及了受暗物质遗迹密度约束的参数组合。我们的新结果证明了在缺失能量暗物质搜索中共振湮灭过程的潜力，为未来专门的 束流研究铺平了道路。
引用
@article{arxiv.2108.04195,
title = {Improved exclusion limit for light dark matter from $e^+e^-$ annihilation in NA64},
author = {Yu. Andreev and D. Banerjee and J. Bernhard and M. Bondi and V. Burtsev and A. Celentano and N. Charitonidis and A. Chumakov and D. Cooke and P. Crivelli and E. Depero and A. Dermenev and S. Donskov and R. Dusaev and T. Enik and A. Feshchenko and V. Frolov and A. Gardikiotis and S. Gerassimov and S. Gninenko and M. Hoesgen and M. Jeckel and V. Kachanov and A. Karneyeu and G. Kekelidze and B. Ketzer and D. Kirpichnikov and M. Kirsanov and V. Kolosov and I. Konorov and S. Kovalenko and V. Kramarenko and L. Kravchuk and N. Krasnikov and S. Kuleshov and V. Lyubovitskij and V. Lysan and L. Marsicano and V. Matveev and Yu. Mikhailov and L. Molina and D. Peshekhonov and V. Polyakov and B. Radics and R. Rojas and A. Rubbia and V. Samoylenko and H. Sieber and D. Shchukin and V. Tikhomirov and I. Tlisova and A. Toropin and A. Trifonov and P. Ulloa and B. Vasilishin and G. Vasquez and P. Volkov and V. Volkov},
journal= {arXiv preprint arXiv:2108.04195},
year = {2021}
}
备注
Version accepted for publication as a Letter in Phys. Rev. D