Search for exotic baryons in double radiative capture on pionic hydrogen

Details Search for exotic baryons in double radiative capture on pionic hydrogen Search for exotic baryons in double radiative capture on pionic hydrogen

2004-03-23

arxiv.org/abs/nucl-ex/0403046v1

Phys.Lett. B597 (2004) 131-138

Physics

Nuclear Physics

Nuclear Experiment

13 pages, 4 figures

Scientific paper

10.1016/j.physletb.2004.07.008

We report a search for low-lying exotic baryons via double radiative capture on pionic hydrogen. The data were collected at the TRIUMF cyclotron using the RMC spectrometer by detecting gamma-ray pairs from pion stops in liquid hydrogen. No evidence was found to support an earlier claim for exotic baryons of masses 1004 and 1044 MeV/$c^2$. We obtain upper limits on the branching ratios for double radiative capture via these exotic states of $< 3 \times 10^{-6}$ and $< 4 \times 10^{-6}$ respectively.

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