Conveners
Morning Session: I
- Yongchao Zhang ()
Morning Session: II
- Lina Wu (Xi’an Technological University)
Morning Session: III
- Sichun Sun (Beijing Institute of Technology)
Morning Session: IV
- Hong Zhang (Shandong University -Qingdao)
Morning Session: V
- Yongchao Zhang ()
We discuss the PQ-quality and the possible hierarchical patterns of axion scales (and couplings) for extra-dimensional axions that originate from higher-dimensional p-form gauge fields. As a concrete example, we consider a 5-dim model on Z2-orbifold involving 1-form and 3-form gauge fields, and examine how the warped geometry and fixed-point interactions affect the PQ-quality and axion scale...
We construct a model of the quintessence axion based on a gauged chiral U(1) symmetry and an additional flat fifth dimension. The required high qualities are guaranteed by the brane separation. The observed cosmological constant (i.e., the potential energy of the quintessence axion) is determined by the size of the extra dimension and the axion decay constant F_a is fixed almost at F_a ≃ 10^17...
Searching for Solar and Reactor Axions with XENONnT and RELICS
Axions can be produced in the Sun through processes such as inverse Compton scattering, the Primakoff effect, and the Fe57 deexcitation, and detected in noble liquid experiments via the inverse Primakoff effect and the axio-electric effect. Liquid xenon experiments, with their large exposure, low background, and low-energy...
The dark photon is a well motivated candidate for the dark matter. A primary tool in this search is the cavity haloscope, which facilitates resonantly enhanced conversion to photons from dark photons. We re-examining the data taken by the Taiwan Axion Search Experiment with Haloscope (TASEH) experiment, and derive a world-leading constraint on the dark photon with mass in the 19.46 - 19.84...
Gravitational wave (GW) birefringence is a remarkable phenomenon which provides a window to test partiy violation in gravity. In this talk, I would discuss our recent studies on the GW birefringence in the FDM and symmetron models. In particular, inspired by the complicated distributions of the Fuzzy dark matter (FDM) and the symmetron field in our Galaxy, we are led to considering the GW...
The axion is particularly well motivated candidate for the dark matter comprising most of the mass of our visible Universe, leading to worldwide experimental and observational efforts towards its discovery. A primary technique in this search is the cavity haloscope, which is used to enhance the rate that dark matter axions convert to photons in a background electromagnetic field. As we...
We derive new constraints on millicharged dark matter from the multimessenger observation of GW170817. In the neutron star merger event GW170817, the first detection of a gamma-ray burst (GRB) delayed by approximately 1.7 seconds relative to the gravitational wave emission was observed. Utilizing this delay, we constrain the millicharge parameter of dark matter within the large-scale structure...
In this talk, I will present the latest results from the Fermilab Muon g-2 experiment and the current status of the PSI muEDM experiment. I will also discuss how these muon storage experiments can be used to search for new particles, such as axions.
We show that scalar perturbations in the early universe could produce a significant amount of these particles primarily through mass parametric resonance effects. Notably, this mechanism does not generate additional isocurvature perturbations.
Haloscoope experiment, with the assumption that the Dark Matter is completely made of Axions, provides the highest Axion search sensitivity. The TASEH experiment is a Haloscope experiment with a copper coated stainless steel cavity inside a 9T magnet in a Dilution Refrigerator operating at 50 mK base temperature. An amplification chain with a self-developed Josephson Parametric Amplifier has...
In this talk I propose a laser-assisted method for the search of light dark particles such as axion-like particle and dark photon. I will first introduce strong-field QED framework and laser-assisted Compton scattering. Then I will discuss the laser-induced Compton scattering to dark particles and show the prospect of detection.
