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The ADMX and BREAD experiments aim to detect this particle by using a strong magnetic field to convert it to photons. For 10 points each:
[10h] Name this hypothetical light dark-matter particle, whose existence was proposed as a consequence of the Peccei–Quinn (“pet-CHAY kwin”) mechanism by Frank Wilczek and Steven Weinberg.
ANSWER: axion [accept higglet; prompt on weakly interacting sub-eV particle or WISP]
[10m] Wilczek named the axion after a detergent brand because it “cleaned up” a problem named for charge conjugation symmetry and this symmetry. Chien-Shiung Wu showed that the weak force violates this symmetry.
ANSWER: parity symmetry [or P-symmetry; accept CP-symmetry; accept, but DO NOT REVEAL, strong-CP problem]
[10e] The Peccei–Quinn mechanism that produces the axion attempts to explain why this fundamental force seemingly does not exhibit CP-violation. This force holds the atomic nucleus together.
ANSWER: strong force [or strong interaction or strong nuclear force]
<Physics>

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Data

Oxford BBirmingham001010
Imperial ABristol B10101030
Cambridge BSouthampton B0101020
Cambridge DDurham B0101020
Durham AEdinburgh1001020
Warwick BImperial B001010
LSE BCambridge C001010
Southampton ALSE A010010
Southampton ASouthampton B010010
Southampton ASouthampton B0101020
Southampton ALSE A0101020
Southampton ALSE A010010
Southampton ASouthampton B010010
Southampton ASouthampton B0101020
Southampton ALSE A0101020
Oxford ATeam 110101030
Warwick ABristol A0101020