With discovery of the Higgs boson, science has located the source for ≲2% of the mass of visible matter. The focus of attention can now shift to the search for the origin of the remaining ≳98%. The instruments at work here must be capable of simultaneously generating the 1 GeV mass-scale associated with the nucleon and ensuring that this mass-scale is completely hidden in the chiral-limit pion. This hunt for an understanding of the emergence of hadronic mass (EHM) has actually been underway for many years. What is changing are the impacts of QCD-related theory, through the elucidation of clear signals for EHM in hadron observables, and the ability of modern and planned experimental facilities to access these observables. These developments are exemplified in a discussion of the evolving understanding of pion and kaon parton distributions.

随着希格斯玻色子的发现，科学已经确定了约2％可见物质质量的来源。现在，注意力的焦点可以转移到寻找其余98％的来源。在此工作的仪器必须能够同时生成与核子相关的1 GeV质量标度，并确保该质量标度完全隐藏在手性限位介子中。寻求了解强子质量（EHM）的过程实际上已经进行了很多年。通过阐明强子可观测物中EHM的清晰信号以及现代和计划中的实验设施访问这些可观测物的能力，正在改变QCD相关理论的影响。在讨论对介子和kaon parton分布的不断发展的理解中举例说明了这些发展。