Axion heliioscopes such as CAST have been used to search for dark photons and, in the absence of their detection, set a limit on dark photon parameters. I am using similar analysis to determine the parameter space that IAXO will be able to explore, and will extend this analysis to include the mixing of different polarisations of solar plasmons by the sun's magnetic field and how this mixing...
Axion-Like-Particles are among the most economical and well motivated extensions of the Standard Model. In this talk ALP production from hadronic and leptonic meson decays are studied. The hadronization part of these decay amplitudes has been obtained using Brodsky-Lepage method or LQCD, at needs. In particular, the general expressions for ALP emission in mesonic s- and t-channel tree-level...
Based on
https://arxiv.org/abs/2209.12945
https://arxiv.org/abs/2212.06194
In this talk I will discuss the features of the formation of shadows around some (ultra)-compact objects due to the presence of light rings surrounding the central depression of optically-thin accretion disks. The shapes of the shadows might reveal novel spacetime structures beyond the well known Kerr family, such that future observations of additional light rings through very-long baseline...
Machine-Learned Likelihood (MLL) is a method that, by combining modern machine-learning classification techniques with likelihood-based inference tests, allows to estimate the experimental sensitivity of high-dimensional data sets. We extend the MLL method by including the exclusion hypothesis tests, and show that the addition of Kernel Density Estimators avoids the need to bin the classifier...
