General heavy WIMP nucleon elastic scattering
General heavy WIMP nucleon elastic scattering
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DOI：
10.1103/physrevd.108.116023
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发表时间：
2023-09
影响因子：
5
通讯作者：
Qing Chen;Gui-Jun Ding;Richard J. Hill
中科院分区：
文献类型：
--
作者：
Qing Chen;Gui-Jun Ding;Richard J. Hill
利用重WIMP（弱相互作用粒子）有效场理论计算了一般重电弱多重态的$mW/M$级WIMP-核子散射率，其中$mW $和$M$分别表示电弱和WIMP质量标度.这种电弱多重态中最轻的中性成分是候选的暗物质粒子，可以是基本粒子，也可以是复合粒子。对电弱SU（2）_W\times \mathrm{U（1）}_Y$的某些表示的现有计算揭示了来自不同有效算子的振幅在1/M$的前导和次前导阶的抵消，产生低于当前暗物质直接探测实验灵敏度的小截面。我们扩展这些计算，并考虑所有低自旋（自旋0，自旋1/2，自旋1，自旋3/2）重电弱多重态任意$\mathrm{SU（2）}_W\times \mathrm{U（1）}_Y$表示，并提供基准的横截面结果暗物质直接探测实验。对于大多数自共轭TeV WIMP与同位旋$\le 3$，截面低于目前的实验极限，但在下一代实验的范围内。一个例外是纯电弱双重态的情况，其中WIMPs隐藏在中微子层之下。
Heavy WIMP (weakly-interacting-massive-particle) effective field theory is used to compute the WIMP-nucleon scattering rate for general heavy electroweak multiplets through order $m_W/M$, where $m_W$ and $M$ denote the electroweak and WIMP mass scales. The lightest neutral component of such an electroweak multiplet is a candidate dark matter particle, either elementary or composite. Existing computations for certain representations of electroweak $\mathrm{SU(2)}_W\times \mathrm{U(1)}_Y$ reveal a cancellation of amplitudes from different effective operators at leading and subleading orders in $1/M$, yielding small cross sections that are below current dark matter direct detection experimental sensitivities. We extend those computations and consider all low-spin (spin-0, spin-1/2, spin-1, spin-3/2) heavy electroweak multiplets with arbitrary $\mathrm{SU(2)}_W\times \mathrm{U(1)}_Y$ representations and provide benchmark cross section results for dark matter direct detection experiments. For most self-conjugate TeV WIMPs with isospin $\le 3$, the cross sections are below current experimental limits but within reach of next-generation experiments. An exception is the case of pure electroweak doublet, where WIMPs are hidden below the neutrino floor.