107 citations · 813 across the 31 of their papers we have counts for
4 papers · 1 filter
The Proton Radius Problem and Point-Particle Effective Field Theory
C. P. Burgess, Peter Hayman, Markus Rummel +1
We argue that the proton's charge-radius contributes differently to shifts of Hydrogen-like energy levels than naively expected due to an incorrect choice for the boundary conditio…
Point-Particle Effective Field Theory II: Relativistic Effects and Coulomb/Inverse-Square Competition
C. P. Burgess, Peter Hayman, Markus Rummel +2
We apply point-particle effective field theory (PPEFT) to compute the leading shifts due to finite-size source effects in the Coulomb bound energy levels of a relativistic spinless…
Consistency of Hitomi, XMM-Newton and Chandra 3.5 keV data from Perseus
Joseph P. Conlon, Francesca Day, Nicholas Jennings +2
\emph{Hitomi} observations of Perseus with the Soft X-ray Spectrometer (SXS) provide a high-resolution look at the 3.5 keV feature reported by multiple groups in the Perseus cluste…
Constraints on Axion-Like Particles from X-ray Observations of NGC1275
Marcus Berg, Joseph P. Conlon, Francesca Day +4
Axion-like particles (ALPs) can induce localised oscillatory modulations in the spectra of photon sources passing through astrophysical magnetic fields. Ultra-deep Chandra observat…