AI 中文总结
本研究在双实单态模型（TRSM）中，探索 LHC 上与电弱规范玻色子伴随产生的轻标量衰变道，发现该道在 LHC 第 3 阶段及 HL-LHC 具有良好的轻标量发现潜力。
AI 中文摘要
我们研究双实单态模型（Two Real Singlet Model，TRSM）中的 exotic 标量衰变 h₂→h₁h₁，聚焦于 CP 偶的轻标量，其质量范围为 20≤M₁≤60 GeV、20≤M₂≤120 GeV。与以往聚焦于胶子胶子融合或矢量玻色子融合产生的研究不同，我们探索与电弱规范玻色子的伴随产生过程 pp→Vh₂（V=W,Z），作为 TRSM 中轻标量级联的互补且实验干净的探针。后续衰变 h₁→b\bar{b} 产生包含 4 个 b 喷注、1 个带电轻子及缺失横能量的末态。我们评估 LHC 第 3 运行阶段及高亮度 LHC（HL-LHC）在质心系能量√s=13.6 TeV 下 4b+ℓν_ℓ 道的灵敏度。对于积分亮度 300 fb⁻¹，W⁺h₂ 道灵敏度最高，达到约 4σ 的显著性，W⁻h₂ 道约为 3σ；在积分亮度 3000 fb⁻¹ 的 HL-LHC 中，对应显著性分别提升至约 12σ 和 8σ，凸显了 TRSM 中轻标量伴随产生的强发现潜力。
英文摘要
We investigate exotic scalar decays $h_2 \to h_1 h_1$ in the Two Real Singlet Model (TRSM), focusing on light CP-even scalars with $20 \le M_{1} \le 60$~GeV and $20 \le M_{2} \le 120$~GeV. Unlike previous studies focused on gluon--gluon fusion or vector-boson fusion production, we explore associated production with electroweak gauge bosons, $pp \to Vh_2$ {\sl($V = W,Z$)}, as a complementary and experimentally clean probe of light scalar cascades in the TRSM. The subsequent decay $h_1 \to b\bar{b}$ leads to final states containing four $b$-jets accompanied by a charged lepton and missing transverse energy. We evaluate the sensitivity of the $4b+\ellν_\ell$ channel at $\sqrt{s}=13.6$~\TeV for the LHC Run~3 and the HL-LHC. For an integrated luminosity of $300~\mathrm{fb}^{-1}$, the $W^+h_2$ channel provides the strongest sensitivity, reaching a significance of approximately $4σ$, while the $W^-h_2$ channel reaches approximately $3σ$. At the HL-LHC with $3000~\mathrm{fb}^{-1}$, the corresponding significances increase to approximately $12σ$ and $8σ$, respectively, highlighting the strong discovery potential of associated light-scalar production in the TRSM.
Comments29 pages, 8 figures
