what were the experiments to find Higg's Boson an attempt to falsify?
The standard model predicts that Higg's boson will have certain characteristics, including (among other things) that it should be found in collisions within a specific energy range. If the experiments had not produced results consistent with Higg's particles in that energy range, it would have falsified some predictions of the Standard Model. If attempts to independently reproduce that (lack of) result turned out the same way, the next job for the theoreticians would be to explain the absence of Higg's particles in those experiments (perhaps leading to a correction of the Standard Model, perhaps to a new model). It would be a setback in a way, but also opens the door to new insights. Discovering that "Everything You Know Is Wrong" often is the first step to a better understanding. Constantly challenging your own beliefs is what makes science work as well as it does, despite the human ego.