"Invisible" particles containing at least one strange quark lower the temperature at which other particles "freeze out" from quark-gluon plasma.
Top quarks are the heaviest and among the most puzzling elementary particles.
Three generations of University of Chicago physicists have spent decades painstakingly cataloging the characteristics of a family of exotic particles called kaons, and an upcoming experiment promises to be the most precise one yet.
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Move Beyond Policies to Build a Lab Culture Where Safety is Second Nature