WASHINGTON (AP) — A committee of physicists says the U.S. should build a billion-dollar project to beam ghostlike subatomic particles 800 miles underground from Chicago to South Dakota. That would help scientists understand these particles, called neutrinos, which zip right through us and pose a major puzzle for researchers.

Steven Ritz of the University of California Santa Cruz, the panel’s chairman, said this would be the biggest American particle physics project in many years. It still wouldn’t be anywhere near as massive as Europe’s Large Hadron Collider, which found the critical Higgs Boson.

The committee on Thursday suggested priorities for federal particle physics projects for the next two decades. If approved and funded, the neutrino beam would take about 10 years to build and could run for another 20 years, experts said.

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