strong CP problem
Sign in to saveAlso known as θ angle, QCD θ angle
the observation that the θ angle in quantum chromodynamics that would violate CP symmetry seems fine-tuned to 0
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International Standard Book Number
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quark
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digital object identifier
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strong interaction
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Forbes
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weak interaction
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dark matter
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particle physics
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Standard Model
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string theory
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Q180686
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bibcode
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Q118398
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quantum chromodynamics
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Q22908627
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parity
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ground state
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axion
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spontaneous symmetry breaking
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gauge theory
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