Constraints on New Physics in the Electron g-2 from a Search for Invisible Decays of a Scalar, Pseudoscalar, Vector, and Axial Vector
Yu. M. Andreev, D. Banerjee, J. Bernhard, V. E. Burtsev, A. G. Chumakov, D. Cooke, P. Crivelli, E. Depero, A. V. Dermenev, S. V. Donskov, R. R. Dusaev, T. Enik,… 展开作者
Yu. M. Andreev, D. Banerjee, J. Bernhard, V. E. Burtsev, A. G. Chumakov, D. Cooke, P. Crivelli, E. Depero, A. V. Dermenev, S. V. Donskov, R. R. Dusaev, T. Enik, N. Charitonidis, A. Feshchenko, V. N. Frolov, A. Gardikiotis, S. G. Gerassimov, S. N. Gninenko, M. Hosgen, V. A. Kachanov, A. E. Karneyeu, G. Kekelidze, B. Ketzer, D. V. Kirpichnikov, M. M. Kirsanov, V. N. Kolosov, I. V. Konorov, S. G. Kovalenko, V. A. Kramarenko, L. V. Kravchuk, N. V. Krasnikov, S. V. Kuleshov, V. E. Lyubovitskij, V. Lysan, V. A. Matveev, Yu. V. Mikhailov, L. Molina Bueno, D. V. Peshekhonov, V. A. Polyakov, B. Radics, R. Rojas, A. Rubbia, V. D. Samoylenko, H. Sieber, D. Shchukin, V. O. Tikhomirov, I. Tlisova, A. N. Toropin, A. Yu. Trifonov, B. I. Vasilishin, P. V. Volkov, V. Yu. Volkov
我们进行了一个新的通用$X$玻色子，它可能是一个标量（$S$），赝标量（$P$），矢量（$V$）或轴向矢量（$A$）粒子在100 GeV的电子散射核，$e^- Z \to e^- Z X$，随后在欧洲核子研究中心的NA 64实验中不可见的衰变产生的搜索。在靶上$2.84\times 10^{11}$电子的完整NA 64数据集中没有发现这种过程的证据。我们把新的界限上的$S, P, V, A$耦合强度的电子，并设置约束其贡献的电子异常磁矩$a_e$，$|Δa_{X}| \lesssim 10^{-15} - 10^{-13}$的$X$质量区域$m_X\lesssim 1$ GeV。这些结果比电子$g-2$实验和最近精细结构常数的高精度测定对$a_e$的当前精度更敏感一个数量级。
英文摘要：
We performed a search for a new generic $X$ boson, which could be a scalar ($S$), pseudoscalar ($P$), vector ($V$) or an axial vector ($A$) particle produced in the 100 GeV electron scattering off nuclei, $e^- Z \to e^- Z X$, followed by its invisible decay in the NA64 experiment at CERN. No evidence for such process was found in the full NA64 data set of $2.84\times 10^{11}$ electrons on target. We place new bounds on the $S, P, V, A$ coupling strengths to electrons, and set constraints on their contributions to the electron anomalous magnetic moment $a_e$, $|Δa_{X}| \lesssim 10^{-15} - 10^{-13}$ for the $X$ mass region $m_X\lesssim 1$ GeV. These results are an order of magnitude more sensitive compared to the current accuracy on $a_e$ from the electron $g-2$ experiments and recent high-precision determination of the fine structure constant.
Constraints on spin-0 dark matter mediators and invisible Higgs decays using ATLAS 13 TeV $pp$ collision data with two top quarks and missing transverse momentum in the final state
