AI 中文总结
该研究在II型跷跷板双希格斯二重态模型下，发现高能γγ对撞机通过特定信号道探测双荷希格斯玻色子的潜力可与传统e⁺e⁻对撞机媲美，在指定质心系能量下可达到5σ发现显著性。
AI 中文摘要
高能γγ对撞可作为未来轻子线性对撞机（如ILC和CLIC）的运行模式实现，为探测扩展希格斯区提供了有前景的环境。我们在II型跷跷板双希格斯二重态模型（2HDMcT）框架内，研究这类对撞机对双荷希格斯玻色子的探测灵敏度。聚焦三体产生道γγ→H^{±±}H₁^{∓}H₁^{∓}和γγ→H^{±±}H₁^{∓}W^{∓}，我们进行了符合理论约束及当前对撞机、味和电弱精密观测量（EWPOs）的参数空间扫描。结果表明，γγ对撞机通过4ℓ+E_T^{miss}（ℓ=e,μ）信号，在探测双荷希格斯玻色子的发现潜力上可与传统e⁺e⁻模式媲美。尽管光子谱导致有效亮度降低，但产生截面显著增强，比电子-正电子对撞的截面高出一个数量级以上，弥补了这一局限。通过在质心系能量√s=830和1245 GeV下进行详细的信号本底分析，我们证明对于可行的基准点（BPs），可达到5σ水平的发现显著性。
英文摘要
High-energy $γγ$ collisions, realizable as an operational mode of future lepton linear colliders such as the ILC and CLIC, provide a promising environment to probe extended Higgs sectors. We investigate the sensitivity of such colliders to doubly charged Higgs bosons within the 2-Higgs Doublet Model with type-II seesaw (2HDMcT). Focusing on the three-body production channels $γγ\to H^{\pm\pm}H_1^{\mp}H_1^{\mp}$ and $γγ\to H^{\pm\pm}H_1^{\mp}W^{\mp}$, we perform a parameter space scan consistent with theoretical constraints as well as current collider, flavor, and electroweak precision observables (EWPOs). We show that $γγ$ collisions can rival the discovery potential of the conventional $e^+e^-$ mode for probing doubly charged Higgs bosons through a $4\ell+E_T^{miss}$ signature ($\ell=e,μ$). Despite the reduced effective luminosity resulting from the photon spectrum, the significantly enhanced production cross sections, exceeding those in electron-positron collisions by more than one order of magnitude, compensate for this limitation. By performing a detailed signal-to-background analysis at center-of-mass energies of $\sqrt{s}=830$ and $1245$ GeV, we demonstrate that a discovery significance at the $5σ$ level can be achieved for viable benchmark points (BPs).
Comments16 pages, 4 figures, 8 tables : Typos have been corrected and some references have been added
