Search for the Pentaquark at COMPASS

doi:10.1140/epjc/s2005-02281-2

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2023 Impact factor 4.2

Particles and Fields

Eur. Phys. J. C (2005) 41: 469-474
https://doi.org/10.1140/epjc/s2005-02281-2

experimental physics

Search for the $\phi1860$ Pentaquark at COMPASS

The COMPASS Collaboration

Abstract

Narrow $\Xi^-\pi^\pm$ and $\bar\Xi^ + \pi^\pm$ resonances produced by quasi-real photons have been searched for by the COMPASS experiment at CERN. The study was stimulated by the recent observation of an exotic baryonic state decaying into $\Xi^-\pi^-$ , at a mass of 1862 MeV, interpreted as a pentaquark. While the ordinary hyperon states $\Xi(1530)^0$ and $\bar\Xi(1530)^0$ are clearly seen, no exotic baryon is observed in the data taken in 2002 and 2003.