The big questions

Through the “Snowmass” process, US particle physicists thoroughly considered the field’s most compelling unanswered questions and ways to realistically answer them. In the next 20 years, particle physicists have the chance to answer some of the most inspiring and grand questions the universe can pose. Just last year, we discovered a Higgs boson--a huge step toward understanding how particles acquire mass--and measured "theta one-three"--an important number that may lead to a better underst...