# Observation of $\bar{p} p \to 2 \pi^0$ at Rest: Evidence Concerning $s$ State Annihilation

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DOI: 10.1103/PhysRevLett.27.1614
OAI: oai:inspirehep.net:68398
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INSPIRE-HEP
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## Abstract

We have identified the annihilation mode p¯p→2π0 for antiprotons stopping in liquid hydrogen at a rate which is 0.15 (±20%) times that reported for p¯p→π+π−. This indicates that about 40% of all annihilations into 2π take place from odd-orbital atomic p¯p states, in contrast to the usual assumption that annihilation from the s state predominates.

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