Predicting the gravitational wave spectrum from symmetry breaking in the early universe during first-order phase transitions is key to understanding these symmetries. In this talk I present our recent advancements in developing a self-consistent framework for predicting such gravitational wave spectra. Our approach enhances existing calculations by providing a more comprehensive treatment of...
Photomultiplier Tubes (PMTs) are central to the SABRE South experiment’s
ability to detect rare, low-energy events, such as potential dark matter interac-
tions in ultra-pure NaI(Tl) crystals. To correctly interpret what the detector
sees, we need simulations that faithfully reproduce how our PMTs respond to
real signals. This work presents the comparison of the simulated PMT wave-
forms...
The QCD axion is a well-motivated hypothetical particle that offers simultaneous solutions to two major open questions in physics: the Strong CP problem and the nature of dark matter. If axions make up the dark matter halo of our galaxy, they may be detected through their resonant conversion into microwave photons in the presence of a strong magnetic field—a technique used in the axion...
The post-merger stage of a binary black hole coalescence is known as "ringdown", when the remnant settles into a stable state through the emission of quasi-normal modes. Analyzing ringdown signals from gravitational-wave events offers a powerful test of general relativity in the strong-field regime and provides an independent consistency check on the full waveform analysis. In this talk, I...
Light scalar and pseudoscalar fields—such as axion- and dilaton-like particles—are well-motivated dark-matter candidates. Their couplings to Standard-Model fields can induce tiny, stochastic modulations of atomic transition frequencies. A statistical framework for clock-based searches is developed, showing that higher-order statistical moments of the measured fluctuations (e.g., skewness,...
