Abstract
The Center for Axion and Precision Physics Research (CAPP) was founded in 2013, with the ambition of shedding light on the strong CP problem and the proposed existence of axions. Much of CAPP's effort focuses on the direct detection of dark matter candidate axions with a series of local haloscope experiments, which endeavour to expand dramatically the coverage on the "invisible axion" mass range. The first two of them plan experimental runs during this year, tapping into ultra-low cryogenics and toroidal cavity geometries. The overall programme builds on cutting-edge technology, including developments in superconducting films, SQUID amplifiers and novel magnets. This article presents the planned advancements and the status of the programme, while it can also be considered a pedagogical introduction to haloscope experiments.
Highlights
Rectangular geometry In addition to the local haloscopes, a rectangular cavity has recently been included in the CAST helioscope[12] at CERN, forming the CAST-Center for Axion and Precision Physics Research (CAPP)/IBS Experiment[13], and is currently in commissioning phase
The experiments, some in commissioning phase and several under R&D, will employ cutting-edge technologies improving on all aspects of haloscope operations. These proceedings presented an introduction to the principles of haloscopes, the CAPP R&D plans and the status of the programme
The Center’s goal over the few years is to cover the major part of the mass and coupling values of dark matter axions, either placing strong bounds on the theoretical expectations or, if the axion exists, discovering it
Summary
The axion was introduced in 1978 as a consequence of the Peccei-Quinn U(1) quasisymmetry[1], a popular proposed solution to the so-called strong CP problem. Nucleons have not so far been observed to possess electric dipole moments, whose presence would imply CP- and P-violation in QCD. The introduction of the, spontaneously broken, Peccei-Quinn symmetry results in the presence of a new pseudoscalar field, known as axion[2], with properties suitable for a dark matter constituent[3]. The Center for Axion and Precision Physics Research (CAPP)[5] was founded in 2013 by the Institute for Basic Science in Daejeon, South Korea, with the goal of covering both sides of the coin of the strong CP problem: Definite measurements of the hadronic electric dipole moments and direct axion detection. Its direct detection searches, whose status is presented here, comprise of a series of experiments with the aim of excluding a significant portion of the axionic cold dark matter models’ parameter space over the years – or, if there is an axion, finding it
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
