ar X iv : 1 70 4 . 07 95 7 v 1 [ he p - ex ] 2 6 A pr 2 01 7 First axion dark matter search with toroidal geometry
نویسنده
چکیده
More than 80% of the matter content in the Universe is now believed to be cold dark matter (CDM) according to precision cosmological measurements [1]. However, the CDM composition is beyond the standard model of particle physics, and thus is still unknown to date. One of the most compelling candidates for CDM is the axion [2] provided its mass is above 1 μeV [3] and below 3 meV [4]. The axion is the result of the breakdown of a new symmetry proposed by Peccei and Quinn [5] to solve the strong CP (Charge-conjugation and Parity) problem in Quantum Chromodynamics [6]. As a result of the axion production mechanism, the axion mass range is very large with the above range being optimum for CDM. The axion search method proposed by Sikivie [7], also known as the axion haloscope search, involves a microwave resonant cavity with a static magnetic field that induces axion conversions into microwave photons. The conversion power corresponding to the axion signal should be enhanced when the axion mass ma matches up to the resonant frequency of the cavity mode ν, ma = hν/c . The power would be detected as the axion signal is
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تاریخ انتشار 2017