Redetermination of the strong-interaction width in pionic hydrogen

A Hirtl, DF Anagnostopoulos, DS Covita… - The European Physical …, 2021 - Springer
The hadronic width of the ground state of pionic hydrogen has been redetermined by X-ray
spectroscopy to be\varGamma^ π H _ 1s=(856\, ±\, 16_ stat\, ±\, 22_ sys) Γ 1 s π H=(856±16 …

Effective field theory calculations of NN→ NNπ

V Baru, C Hanhart, F Myhrer - International Journal of Modern …, 2014 - World Scientific
In this review, we present the recent advances for calculations of the reactions NN→ NNπ
using chiral effective field theory χEFT. Discussed are the next-to-next-to leading order …

Pionic deuterium

T Strauch, FD Amaro, DF Anagnostopoulos… - The European Physical …, 2011 - Springer
The strong-interaction shift ε 1 s π D and broadening Γ 1 s π D in pionic deuterium have
been determined in a high statistics study of the π D (3 p-1 s) X-ray transition using a high …

Hadronic shift in pionic hydrogen

M Hennebach, DF Anagnostopoulos, A Dax… - The European Physical …, 2014 - Springer
The hadronic shift in pionic hydrogen has been redetermined to be ε 1 s= 7.086±0.007
(stat)±0.006 (sys) eV by X-ray spectroscopy of ground-state transitions applying various …

Pion absorption from the lowest atomic orbital in , and

J Golak, V Urbanevych, R Skibiński, H Witała… - Physical Review C, 2022 - APS
The π−+ H 2→ n+ n, π−+ H 3→ n+ n+ n, π−+ He 3→ n+ d, and π−+ He 3→ p+ n+ n capture
reactions from the lowest 1 S atomic orbitals are studied under full inclusion of final state …

Line shape analysis of the Kβ transition in muonic hydrogen

DS Covita, DF Anagnostopoulos, H Fuhrmann… - The European Physical …, 2018 - Springer
The K β transition in muonic hydrogen was measured with a high-resolution crystal
spectrometer. The spectrum is shown to be sensitive to the ground-state hyperfine splitting …

Isotopic effects in scattering and kinetics of the atomic cascade of excited and atoms

VP Popov, VN Pomerantsev - Physical Review A, 2017 - APS
The quantum-mechanical calculations of the differential and integrated cross sections of the
elastic scattering, Stark transitions, and Coulomb deexcitation at collisions of excited μ− p …

Pionic hydrogen and friends

D Gotta, FD Amaro, DF Anagnostopoulos, P Bühler… - Hyperfine …, 2015 - Springer
Pion-nucleon scattering lengths are directly related to the ground-state level shift and
broadening in pionic hydrogen as well as to the pionic deuterium level shift. The level …

Pionic hydrogen and deuterium

D Gotta, FD Amaro, DF Anagnostopoulos… - EXA 2011: Proceedings …, 2012 - Springer
The ground-state level shifts and broadenings of the hydrogen isotopes caused by the
strong interaction have been redetermined by using a high-resolution crystal spectrometer …

Threshold pion production in proton-proton collisions at NNLO in chiral EFT

V Baru, E Epelbaum, AA Filin, C Hanhart… - The European Physical …, 2016 - Springer
The reaction NN→NNπ offers a good testing ground for chiral effective field theory at
intermediate energies. It challenges our understanding of the first inelastic channel in …