Laboratory astroparticle physics

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Theory of x-ray photon correlation spectroscopy for multiscale flows

Physical Review Research American Physical Society (APS) 7:2 (2025) 023202

Authors:

Hao Yin, Charles Heaton, Eric G Blackman, Arianna E Gleason, Joshua J Turner, Gilbert W Collins, Gianluca Gregori, Jessica K Shang, Hussein Aluie

QSHS: An Axion Dark Matter Resonant Search Apparatus

(2025)

Authors:

A Alsulami, I Bailey, G Carosi, G Chapman, B Chakraborty, EJ Daw, N Du, S Durham, J Esmenda, J Gallop, T Gamble, T Godfrey, G Gregori, J Halliday, L Hao, E Hardy, EA Laird, P Leek, J March-Russell, PJ Meeson, CF Mostyn, Yu A Pashkin, SO Peatain, M Perry, M Piscitelli, M Reig, EJ Romans, S Sarkar, PJ Smith, A Sokolov, N Song, A Sundararajan, B-K Tan, SM West, S Withington

Modeling of warm dense hydrogen via explicit real-time electron dynamics: Electron transport properties

Physical Review E American Physical Society (APS) 111:4 (2025) 045208

Authors:

Pontus Svensson, Patrick Hollebon, Daniel Plummer, Sam M Vinko, Gianluca Gregori

Larmor radiation as a witness to the Unruh effect

(2025)

Authors:

Atsushi Higuchi, George EA Matsas, Daniel AT Vanzella, Robert Bingham, Joao PB Brito, Luis CB Crispino, Gianluca Gregori, Georgios Vacalis

Bounds on heavy axions with an X-ray free electron laser

Physical Review Letters American Physical Society 134:5 (2025) 55001

Authors:

Jack WD Halliday, Giacomo Marocco, Konstantin A Beyer, Charles Heaton, Motoaki Nakatsutsumi, Thomas R Preston, Charles Arrowsmith, Carsten Baehtz, Sebastian Goede, Oliver Humphries, Alejandro Laso Garcia, Richard Plackett, Pontus Svensson, Georgios Vacalis, Justin Wark, Daniel Wood, Ulf Zastrau, Robert Bingham, Ian Shipsey, Subir Sarkar, Gianluca Gregori

Abstract:

We present new exclusion bounds obtained at the European X-Ray Free Electron Laser facility (EuXFEL) on axionlike particles in the mass range $10^{-3}\,\mathrm{eV} \lesssim m_a \lesssim 10^{4}\,\mathrm{eV}$. Our experiment exploits the Primakoff effect via which photons can, in the presence of a strong external electric field, decay into axions, which then convert back into photons after passing through an opaque wall. While similar searches have been performed previously at a third-generation synchrotron [Yamaji et al., Phys.\ Lett.\ B 782, 523 (2018)], our work demonstrates improved sensitivity, exploiting the higher brightness of x-rays at EuXFEL.