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arXiv 2307.02404hep-exhep-ph
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在CERN利用NA64实验搜寻轻暗物质

Search for Light Dark Matter with NA64 at CERN

Yu. M. Andreev, D. Banerjee, B. Banto Oberhauser, J. Bernhard, P. Bisio, A. Celentano, N. Charitonidis, A. G. Chumakov, D. Cooke, P. Crivelli, E. Depero, A. V. … 展开作者

Yu. M. Andreev, D. Banerjee, B. Banto Oberhauser, J. Bernhard, P. Bisio, A. Celentano, N. Charitonidis, A. G. Chumakov, D. Cooke, P. Crivelli, E. Depero, A. V. Dermenev, S. V. Donskov, R. R. Dusaev, T. Enik, V. N. Frolov, R. B. Galleguillos Silva, A. Gardikiotis, S. V. Gertsenberger, S. Girod, S. N. Gninenko, M. H"osgen, V. A. Kachanov, Y. Kambar, A. E. Karneyeu, E. A. Kasianova, G. D. Kekelidze, B. Ketzer, D. V. Kirpichnikov, M. M. Kirsanov, V. N. Kolosov, V. A. Kramarenko, L. V. Kravchuk, N. V. Krasnikov, S. V. Kuleshov, V. E. Lyubovitskij, V. Lysan, A. Marini, L. Marsicano, V. A. Matveev, R. Mena Fredes, R. G. Mena Yanssen, L. Molina Bueno, M. Mongillo, D. V. Peshekhonov, V. A. Polyakov, B. Radics, K. M. Salamatin, V. D. Samoylenko, H. Sieber, D. Shchukin, O. Soto, V. O. Tikhomirov, I. V. Tlisova, A. N. Toropin, A. Yu. Trifonov, M. Tuzi, B. I. Vasilishin, P. V. Volkov, V. Yu. Volkov, I. V. Voronchikhin, J. Zamora-Saa, A. S. Zhevlakov

备注：
7 pages, 7 figures. arXiv admin note: text overlap with arXiv:1906.00176
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AI总结：

NA64实验利用100 GeV电子轰击活性靶，通过暗光子A'介导搜寻亚GeV热暗物质，首次探测基准标量与费米子暗物质模型参数空间，未发现信号并对A'-光子耦合及χ-A'耦合设定了迄今最灵敏的限制。

摘要：

粒子χ质量低于电弱尺度的热暗物质模型可以为观测到的遗迹暗物质密度提供解释。这意味着暗物质与普通物质之间存在一种新的微弱相互作用。我们报告了一项新的搜寻工作，通过一种称为暗光子A'的新矢量玻色子介导的相互作用，在CERN SPS的NA64实验中利用100 GeV电子与活性靶的碰撞来寻找亚GeV的χ产生。在2016至2022年运行期间收集了9.37×10^11个靶上电子，NA64首次探测了基准热标量和费米子暗物质模型中具有良好动机的参数空间区域。未发现暗物质产生的证据。这使我们能够对质量m_{A'} ≲ 0.35 GeV的A'与光子的耦合设定最灵敏的限制，并在质量0.001 ≲ m_χ ≲ 0.1 GeV且3m_χ ≤ m_{A'}的条件下，排除χ-A'耦合α_D ≤ 0.1的标量和Majorana暗物质。

英文摘要：

Thermal dark matter models with particle $χ$ masses below the electroweak scale can provide an explanation for the observed relic dark matter density. This would imply the existence of a new feeble interaction between the dark and ordinary matter. We report on a new search for the sub-GeV $χ$ production through the interaction mediated by a new vector boson, called the dark photon $A'$, in collisions of 100 GeV electrons with the active target of the NA64 experiment at the CERN SPS. With $9.37\times10^{11}$ electrons on target collected during 2016-2022 runs NA64 probes for the first time the well-motivated region of parameter space of benchmark thermal scalar and fermionic dark matter models. No evidence for dark matter production has been found. This allows us to set the most sensitive limits on the $A'$ couplings to photons for masses $m_{A'} \lesssim 0.35$ GeV, and to exclude scalar and Majorana dark matter with the $χ-A'$ coupling $α_D \leq 0.1$ for masses $0.001 \lesssim m_χ\lesssim 0.1$ GeV and $3m_χ\leq m_{A'}$.

机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。

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