Search for a narrow charmed baryonic state decaying to in ep collisions at HERA

doi:10.1140/epjc/s2004-02042-9

EPJ

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2024 Impact factor 4.8

Particles and Fields

Eur. Phys. J. C (2004) 38: 29-41
https://doi.org/10.1140/epjc/s2004-02042-9

experimental physics

Search for a narrow charmed baryonic state decaying to $D^{\ast \pm} p^\mp$ in ep collisions at HERA

The ZEUS Collaboration

Abstract

A resonance search has been made in the $D^{\ast \pm} p^\mp$ invariant-mass spectrum with the ZEUS detector at HERA using an integrated luminosity of $126\text{pb}^{-1}$ . The decay channels $D^{\ast + }\rightarrow D^{0}\pi^{ + }_{s}\rightarrow(K^{-}\pi^{ + })\pi^{ + }_{s}$ and $D^{\ast + }\rightarrow D^{0}\pi^{ + }_{s}\rightarrow(K^{-}\pi^{ + }\pi^{ + }\pi^{-})\pi^{ + }_{s}$ (and the corresponding antiparticle decays) were used to identify $D^{\ast \pm}$ mesons. No resonance structure was observed in the $D^{\ast \pm} p^\mp$ mass spectrum from more than 60 000 reconstructed $D^{\ast \pm}$ mesons. The results are not compatible with a report of the H1 Collaboration of a charmed pentaquark, $\Theta^0_c$ .