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Supersymmetry’s absence at LHC puzzles physicists

Lack of new particles suggests need to consider new theories

By
8:00am, September 6, 2016
CERN control room

HIGH HOPES  Scientists watched from the CERN control room as the LHC particle accelerator first began running at higher energies in June 2015. New data from the LHC has revealed no hints of new particles, despite physicists’ high hopes.

A beautiful but unproved theory of particle physics is withering in the harsh light of data.

For decades, many particle physicists have devoted themselves to the beloved theory, known as supersymmetry. But it’s beginning to seem that the zoo of new particles that the theory predicts —the heavier cousins of known particles — may live only in physicists’ imaginations. Or if such particles, known as superpartners, do exist, they’re not what physicists expected.

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