How stressful was the COVID-19 pandemic for residents specializing in family practice?. A study of stressors and psychological well-being of physicians in further training specializing in family practice (GP trainees) within a pandemic context.

Background: The coronavirus pandemic poses many challenges for medical personnel. During the first phase of the pandemic, psychological stress became increasingly apparent. This was a complex and difficult situation, especially for physician residents specializing in family practice (GP trainees), who were not yet able to draw on years of practical experience.

Measurement of the helicity asymmetry for the reaction : The CBELSA/TAPS Collaboration.

A measurement of the double-polarization observable for the reaction is reported. The data were taken with the CBELSA/TAPS experiment at the ELSA facility in Bonn using the Bonn frozen-spin butanol (C H OH) target, which provided longitudinally-polarized protons. Circularly-polarized photons were produced via bremsstrahlung of longitudinally-polarized electrons.

Observation of the pη^{'} Cusp in the New Precise Beam Asymmetry Σ Data for γp→pη.

Data on the beam asymmetry Σ in the photoproduction of η mesons off protons are reported for tagged photon energies from 1130 to 1790 MeV (mass range from W=1748  MeV to W=2045  MeV). The data cover the full solid angle that allows for a precise moment analysis. For the first time, a strong cusp effect in a polarization observable has been observed that is an effect of a branch-point singularity at the pη^{'} threshold [E_{γ}=1447  MeV (W=1896  MeV)].