标题： 轻夸克Yukawa在三玻色子末态中的情况 显示英文标题

标题： Light quark Yukawas in triboson final states

摘要： 三重重矢量玻色子产生，$p p \to VVV$ $(V = W, Z)$ ，最近首次被观测到。 我们提出，对该过程的精确测量可作为研究第一代轻夸克的Yukawa耦合的极好探针。 该过程中与非定域希格斯的夸克相互作用导致部分子截面随能量迅速增长，这体现在最终态轻子和夸克的$p_T$分布增强上。 我们量化了这一效应，并估计了目前和未来2$\sigma$对上、下和奇异Yukawas的敏感度。 特别是，我们发现HL-LHC相对于标准模型值可以达到$\mathcal{O}(400)$对下Yukawa的敏感度，比该过程中当前的敏感度提高了一个因子$10$，并且在FCC-hh上可以进一步提高到$\mathcal{O}(30)$。 这与全局拟合和其他对第一代Yukawas的单态探针的结果具有竞争力且互补。 在高亮度大型强子对撞机（HL-LHC）上的三玻色子敏感度对应于探测由$\mathcal{O}(1)$TeV尺度抑制的六维SMEFT算符，与其他LHC希格斯探针类似。 显示英文摘要

摘要： Triple heavy vector boson production, $p p \to VVV$ $(V = W, Z)$, has recently been observed for the first time. We propose that precision measurements of this process provide an excellent probe of the first generation light quark Yukawa couplings. Modified quark interactions with the off-shell Higgs in this process lead to a rapid growth of the partonic cross sections with energy, which manifests in an enhanced $p_T$ distribution of the final state leptons and quarks. We quantify this effect and estimate the present and future 2$\sigma$ sensitivity to the up, down, and strange Yukawas. In particular, we find that HL-LHC can reach $\mathcal{O}(400)$ sensitivity to the down Yukawa relative to the Standard Model value, improving the current sensitivity in this process by a factor of $10$, and which can be further improved to $\mathcal{O}(30)$ at FCC-hh. This is competitive with and complementary to constraints from global fits and other on-shell probes of the first generation Yukawas. The triboson sensitivity at HL-LHC corresponds to probing dimension-6 SMEFT operators suppressed by an $\mathcal{O}(1)$ TeV scale, similarly to other LHC Higgs probes.