赫希玛粒子有多迷人？

赫希玛玻色子与第一和第二代费米子的耦合尚未被实验测量。然而，由于味型完全未知，仍可能存在这些耦合的巨大偏差。即便如此，如果 Yukawa耦合发生改变，特别是针对轻型生成，通常会产生强烈的味变中性流（FCNCs）约束。因此，必须弄清 whether there exists viable UV physics consistent with current data that motivates future Higgs coupling probes. In particular, the charm-quark Yukawa is the next quark coupling that could be measured at the LHC if it is a few times larger than the SM and compatible with flavor data. This is difficult to achieve in the context of standard ansatz such as Minimal Flavor Violation. In this paper we show that within the framework of Spontaneous Flavor Violation (SFV), using a Two Higgs Doublet Model as an example, the Higgs can be sufficiently charming that new LHC probes are relevant. In this charming region, we show that new Higgs states near the EW scale with large couplings to quarks are required, providing complementary observables or new constraints on the SM Yukawa couplings. The down-type SFV mechanism enabling the suppression of FCNCs also allows for independent modifications to the up-quark Yukawa coupling, which we explore in detail as well.