Looking Where The Light Isn’t
"The hunt is on to directly detect Dark Matter, and several exciting upgrades to liquid noble gas experiments are coming online in 2016. Perhaps there will be detections. But so far the direct detection experiments have only produced upper limits. In the end, neutrinos just might be the only form of Dark Matter we ever get to “see”."
"A policeman saw a drunk man looking for something under a streetlight and asked what the drunk lost. The drunk says “I lost my keys” and they both look under the streetlight together. After a while the policeman asks “Are you sure you lost them here?” The drunk replies “No, I lost them in the park.” The policeman says “Why are you searching here?” The drunk replies, “this is where the light is!” For decades this search strategy has been employed both by drunks and by neutrino hunters, with no keys in sight and few key insights. In 1916 Einstein published the second of his General Relativity papers. One hundred years later, using Einstein’s predictions, we are at the precipice of “weighing” the last elementary particle whose mass is unknown. Isn’t this old news? Don’t we know all the fundamental particle masses already after measuring the Higgs boson’s mass? Well, yes and no. Looking at the Standard Model, we see 16 massive particles (quarks), leptons (like electrons), and bosons (such as the photon), plus the Higgs boson charted together in a table reminiscent of Mendeleev’s Periodic Table of the Elements, except in the case of the quarks, bosons, and leptons on the table, there is no periodicity, no apparent ordering at work here."