Zobrazeno 1 - 10
of 86
pro vyhledávání: '"Rummel, Markus"'
Autor:
Andriolo, Stefano1 (AUTHOR), Rummel, Markus1 (AUTHOR), Gronwald, Thomas2,3 (AUTHOR) thomas.gronwald@medicalschool-hamburg.de
Publikováno v:
Sensors (14248220). Jul2024, Vol. 24 Issue 14, p4468. 12p.
Autor:
Patel, Zakaria, Rummel, Markus
Neural networks allow us to model complex relationships between variables. We show how to efficiently find extrema of a trained neural network in regression problems. Finding the extremizing input of an approximated model is formulated as the trainin
Externí odkaz:
http://arxiv.org/abs/2102.03626
Nuclear-structure effects often provide an irreducible theory error that prevents using precision atomic measurements to test fundamental theory. We apply newly developed effective field theory tools to Hydrogen atoms, and use them to show that (to t
Externí odkaz:
http://arxiv.org/abs/2008.09719
Autor:
Rummel, Markus, Burgess, C. P.
Publikováno v:
JCAP 05 (2020) 051
We show how Event Horizon Telescope (EHT) observations of the supermassive object at the center of M87 can constrain deviations from General Relativity (GR) in a relatively model-independent way. We focus on the class of theories whose deviations fro
Externí odkaz:
http://arxiv.org/abs/2001.00041
Autor:
Conlon, Joseph P., Rummel, Markus
X-ray observations of bright AGNs in or behind galaxy clusters offer unique capabilities to constrain axion-like particles (ALPs). Existing analysis technique rely on measurements of the global goodness-of-fit. We develop a new analysis methodology t
Externí odkaz:
http://arxiv.org/abs/1808.05916
Gravitational wave `echoes' during black-hole merging events have been advocated as possible signals of modifications to gravity in the strong-field (but semiclassical) regime. In these proposals the observable effect comes entirely from the appearan
Externí odkaz:
http://arxiv.org/abs/1808.00847
Publikováno v:
JHEP 10 (2018) 122
Persistent puzzles to do with information loss for black holes have stimulated critical reassessment of the domain of validity of semiclassical EFT reasoning in curved spacetimes, particularly in the presence of horizons. We argue here that perturbat
Externí odkaz:
http://arxiv.org/abs/1806.11415
Publikováno v:
Phys. Rev. A 98, 052510 (2018)
We apply point-particle effective field theory (PPEFT) to electronic and muonic 4He+ ions, and use it to identify linear combinations of spectroscopic measurements for which the theoretical uncertainties are much smaller than for any particular energ
Externí odkaz:
http://arxiv.org/abs/1708.09768
An interesting result in particle astrophysics is the recent detection of an unexplained 3.5 keV line from galaxy clusters. A promising model, which can explain the morphology of the signal and its non-observation in dwarf spheroidal galaxies, involv
Externí odkaz:
http://arxiv.org/abs/1707.02987
We formulate point-particle effective field theory (PPEFT) for relativistic spin-half fermions interacting with a massive, charged finite-sized source using a first-quantized effective field theory for the heavy compact object and a second-quantized
Externí odkaz:
http://arxiv.org/abs/1706.01063