2 research outputs found
Blinding for precision scattering experiments: The MUSE approach as a case study
Human bias is capable of changing the analysis of measured data sufficiently
to alter the results of an experiment. It is incumbent upon modern experiments,
especially those investigating quantities considered contentious in the broader
community, to blind their analysis in an effort to minimize bias. The choice of
a blinding model is experiment specific, but should also aim to prevent
accidental release of results before an analysis is finalized. In this paper,
we discuss common threats to an unbiased analysis, as well as common quantities
that can be blinded in different types of nuclear physics experiments. We use
the Muon Scattering Experiment as an example, and detail the blinding scheme
used therein.Comment: 6 pages, 3 figure
Instrumental uncertainties in radiative corrections for the MUSE experiment
The MUSE experiment at the Paul Scherrer Institute is measuring elastic
lepton-proton scattering cross sections in a four-momentum transfer range from
of approximately 0.002 to 0.08 GeV using positively and negatively
charged electrons and muons. The extraction of the Born cross sections from the
experimental data requires radiative corrections. Estimates of the instrumental
uncertainties in those corrections have been made using the ESEPP event
generator. The results depend in particular on the minimum lepton momentum that
contributes to the experimental cross section and the fraction of events with
hard initial-state radiation that is detected in the MUSE calorimeter and is
excluded from the data. These results show that the angular-dependent
instrumental uncertainties in radiative corrections to the electron cross
section are better than 0.4 % and are negligible for the muon cross section.Comment: Article to be submitted to the EPJ A Topical Collection on radiative
corrections. 9 pages, 5 figures, 2 table