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arXiv 2104.01780hep-ph
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$J/ψ\to (γ+ ){\rm invisible}$对中微子和暗物质的有效场论的意义

The implication of $J/ψ\to (γ+ ){\rm invisible}$ for the effective field theories of neutrino and dark matter

Tong Li, Xiao-Dong Ma, Michael A. Schmidt, Rui-Jia Zhang

摘要:

研究了$J/ψ$衰变为不可见粒子对轻不育中微子和亚GeV暗物质的影响。用低能有效场论描述了一般中微子相互作用和耦合到粲夸克的狄拉克费米子DM。对于$J/ψ\to γ+{\rm invisible}$,我们执行的可能性适合的个人中微子和DM运营商具有不同的洛伦兹结构和光子谱。对不同的中微子或DM方案的衰变分支分数的限制,然后转换为新的能量标度的下限。中微子和DM EFT的能量尺度上最严格的界限分别为12.8 GeV和11.6 GeV。完全不可见的衰减$J/ψ\to {\rm invisible}$为有效算子提供了补充约束。能量标度上的相关约束是100 GeV以上的偶极子运营商。我们还评估了由$J/ψ$数据转换的DM-核子散射截面的极限。$J/ψ$不可见衰变的数据对DM直接探测实验尚不能探测到的轻DM质量范围很敏感。未来的超级头魅力工厂在运行一年后可以将极限降低两个数量级。

英文摘要:

We study the implication of $J/ψ$ decay into invisible particles for light sterile neutrino and sub-GeV dark matter (DM). The low-energy effective field theories (EFTs) are used for the description of general neutrino interactions and the Dirac fermion DM coupled to charm quark. For $J/ψ\to γ+{\rm invisible}$, we perform the likelihood fits for the individual neutrino and DM operators with distinct Lorentz structures and photon spectra. The limits on the decay branching fractions are obtained for different neutrino or DM scenarios and then converted to the lower bounds on the new energy scales. The most stringent bounds on the energy scale in neutrino and DM EFTs are 12.8 GeV and 11.6 GeV, respectively. The purely invisible decay $J/ψ\to {\rm invisible}$ provides complementary constraints on the effective operators. The relevant bound on the energy scale is above 100 GeV for the dipole operators. We also evaluate the limit on the DM-nucleon scattering cross section converted from $J/ψ$ data. The data of $J/ψ$ invisible decays are sensitive to the light DM mass range where the DM direct detection experiments cannot probe yet. The future Super Tau Charm Factory after one year run can push the limits down by two orders of magnitude.

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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