ALPS II reports no detection of axion-like particles and establishes improved 95% CL upper limits on di-photon couplings of 1.5e-9 GeV^-1 for masses below 0.1 meV, plus limits for scalar, vector, and tensor bosons.
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Topology of Euclidean Schwarzschild black holes permits dyonic electromagnetic instantons that source CP-asymmetric Hawking radiation via the theta term.
The θ-vacuum structure in QCD produces observable CP violation when the theory is consistently quantized with boundary degrees of freedom accounted for in the infinite-volume limit.
citing papers explorer
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Any Light Particle Searches with ALPS II: first science results
ALPS II reports no detection of axion-like particles and establishes improved 95% CL upper limits on di-photon couplings of 1.5e-9 GeV^-1 for masses below 0.1 meV, plus limits for scalar, vector, and tensor bosons.
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Electromagnetic instantons and asymmetric Hawking radiation of black holes
Topology of Euclidean Schwarzschild black holes permits dyonic electromagnetic instantons that source CP-asymmetric Hawking radiation via the theta term.
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On the $\uptheta$-vacua and CP violation
The θ-vacuum structure in QCD produces observable CP violation when the theory is consistently quantized with boundary degrees of freedom accounted for in the infinite-volume limit.