Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
2012-04-11
Physics
High Energy Physics
High Energy Physics - Experiment
2 pages, 7 figures
Scientific paper
In the recent preprint 1202.1739 it was claimed that preliminary data presented by COMPASS at recent conferences confirm the existence of a resonant state of mass 38 MeV decaying to two photons. This claim was made based on structures observed in two-photon mass distributions which however were shown only to demonstrate the purity and mass resolution of the {\pi}0 and {\eta} signals. The additional structures are understood as remnants of secondary interactions inside the COMPASS spectrometer. Therefore, the COMPASS data do not confirm the existence of this state.
Bernhard J.
for the COMPASS Collaboration
Friedrich Jan M.
Schlüter Tobias
Schonning K.
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