Direct limits on the interaction of antiprotons with axion-like dark matter
Direct limits on the interaction of antiprotons with axion-like dark matter
复制标题
反质子与类轴子暗物质相互作用的直接限制
作者：
C. Smorra;Y. Stadnik;P. E. Blessing;M. Bohman;M. Borchert;J. Devlin;S. Erlewein;J. Harrington;Takashi Higuchi;A. Mooser;G. Schneider;M. Wiesinger;E. Wursten;K. Blaum;Y. Matsuda;C. Ospelkaus;W. Quint;J. Walz;Y. Yamazaki;D. Budker;S. Ulmer
天体物理观测表明，宇宙中的暗物质大约是普通重子物质的五倍1，而宇宙中更大数量的能量来自暗能量2。然而，这些暗成分的微观特性仍然未知。此外，即使是占宇宙能量密度5%的普通物质也尚未被理解，因为粒子物理学的标准模型对物质相对于反物质的优势缺乏任何一致的解释。在这里，我们提出了一个直接搜索的反物质与暗物质的相互作用，并直接限制超轻轴子类粒子（暗物质候选人）与反质子的相互作用。如果反质子与这些粒子的耦合比质子更强，那么这种物质-反物质的不对称耦合可能会在暗物质和宇宙中的重子不对称性之间提供联系。我们分析自旋翻转共振数据在频域中获得一个单一的反质子在潘宁trap 4搜索自旋进动效应的超轻轴子，它有一个特征频率由底层粒子的质量。我们的分析将轴子-反质子相互作用参数限制在质量范围从2 × 10−23到4 × 10−17电子伏特的大于0.1到0.6千兆电子伏特的值，与天体物理学的反质子边界相比，灵敏度提高了5个数量级。此外，我们推导出六个组合的限制以前无约束的洛伦兹和CPT违反条款的非最小标准模型extension 5。自旋翻转共振数据被用来放置直接约束超轻类轴子粒子与反质子的相互作用，提高了五个数量级的相应的耦合系数的灵敏度。
Astrophysical observations indicate that there is roughly five times more dark matter in the Universe than ordinary baryonic matter1, and an even larger amount of the Universe’s energy content is attributed to dark energy2. However, the microscopic properties of these dark components remain unknown. Moreover, even ordinary matter—which accounts for five per cent of the energy density of the Universe—has yet to be understood, given that the standard model of particle physics lacks any consistent explanation for the predominance of matter over antimatter3. Here we present a direct search for interactions of antimatter with dark matter and place direct constraints on the interaction of ultralight axion-like particles (dark-matter candidates) with antiprotons. If antiprotons have a stronger coupling to these particles than protons do, such a matter–antimatter asymmetric coupling could provide a link between dark matter and the baryon asymmetry in the Universe. We analyse spin-flip resonance data in the frequency domain acquired with a single antiproton in a Penning trap4 to search for spin-precession effects from ultralight axions, which have a characteristic frequency governed by the mass of the underlying particle. Our analysis constrains the axion–antiproton interaction parameter to values greater than 0.1 to 0.6 gigaelectronvolts in the mass range from 2 × 10−23 to 4 × 10−17 electronvolts, improving the sensitivity by up to five orders of magnitude compared with astrophysical antiproton bounds. In addition, we derive limits on six combinations of previously unconstrained Lorentz- and CPT-violating terms of the non-minimal standard model extension5. Spin-flip resonance data are used to place direct constraints on the interaction of ultralight axion-like particles with antiprotons, improving the sensitivity to the corresponding coupling coefficient by five orders of magnitude.
登录
查看更多内容
影响因子：
5
作者：
K. Nakamura;K. Hagiwara;K. Hikasa;H. Murayama;M. Tanabashi;T. Watari;C. Amsler;M. Antonelli
通讯作者：
K. Nakamura;K. Hagiwara;K. Hikasa;H. Murayama;M. Tanabashi;T. Watari;C. Amsler;M. Antonelli
DOI：
10.1140/epjst/e2015-02607-4
发表时间：
2015-11
期刊：
The European Physical Journal Special Topics
影响因子：
--
作者：
C. Smorra;K. Blaum;L. Bojtár;M. Borchert;K. Franke;Takashi Higuchi;N. Leefer;H. Nagahama;Y. Matsuda;A. Mooser;M. Niemann;C. Ospelkaus;C. Ospelkaus;W. Quint;G. Schneider;S. Sellner;T. Tanaka;S. Gorp;J. Walz;Y. Yamazaki;S. Ulmer
通讯作者：
C. Smorra;K. Blaum;L. Bojtár;M. Borchert;K. Franke;Takashi Higuchi;N. Leefer;H. Nagahama;Y. Matsuda;A. Mooser;M. Niemann;C. Ospelkaus;C. Ospelkaus;W. Quint;G. Schneider;S. Sellner;T. Tanaka;S. Gorp;J. Walz;Y. Yamazaki;S. Ulmer
质子磁矩的双陷阱测量，精度为 0 3 ppb
影响因子：
56.9
作者：
Schneider;Mooser;Bohman;Schön;Harrington;Higuchi;Matsuda
通讯作者：
Matsuda
影响因子：
64.8
作者：
Smorra, C.;Sellner, S.;Ulmer, S.
通讯作者：
Ulmer, S.