论文标题
LHCB在四人最终状态下观察到的$ x（6900）$的可能解释 - 像灯光一样的玻色子？
A possible interpretation for $X(6900)$ observed in four-muon final state by LHCb -- A light Higgs-like boson?
论文作者
论文摘要
使用LHC的运行i和II数据观察并分析了$ J/ψ$对生产的峰值结构约为6.9〜{\ rm Gev} $。如何理解这一峰值引起了高能量物理学家和实验家的热情讨论，因为这一发现可能会暗示一些新事物。在这个主题上的压倒性作品往往将峰归因于四夸克状态：四夸克或分子。取而代之的是，我们建议该峰与基本的Higgs样玻色子相对应，质量约为$ 6.9〜 {\ rm Gev} $，这是由BSM有效理论提倡的。我们对信号和SM背景进行了详细的分析，包括最终国家$ j/ψ$对的集成横截面和不变质量分布。我们的数值结果与实验数据一致，因为假定LHCB观察到的共振为BSM $ 0^{++} $ stalarar。因此，$ m _ {\ text {di-} j/ψ} \ sim 6.9〜 {\ rm gev} $的峰值可能是SM以外的新物理学的暗示，其规模不如高能量物理学家所期望的那样大。在实验和理论方面迫切需要进一步的工作，以验证或否定这一假设。
A peak structure of $J/ψ$ pair production around $6.9~{\rm GeV}$ was observed and analyzed by the LHCb collaboration using the Run I and II data of LHC. How to understand this peak arouses enthusiastic discussions among both theorists and experimentalists of high energy physics, because this discovery might hint something new. Overwhelming works on this topic tend to attribute the peak as a four-quark state: tetraquark or molecule. Instead, we suggest that this peak is corresponding to a fundamental Higgs-like boson with mass about $6.9~{\rm GeV}$ which is advocated by a BSM effective theory. We present a detailed analysis on both signal and SM background, including integrated cross sections and invariant mass distributions of the final-state $J/ψ$ pair. Our numerical results are well in coincidence with the experimental data, as postulating the resonance observed by LHCb to be a BSM $0^{++}$ scalar. Therefore, the peak at $M_{\text{di-}J/ψ} \sim 6.9~{\rm GeV}$ might be a hint of new physics beyond the SM whose scale is not as large as mostly expected by high energy physicists. More further works are urgently needed in both experimental and theoretical aspects to validate or negate this assumption.
