A note on charmed and bottomed pentaquark production by fragmentation

Abstract

H1 Collaboration recently observed the charmed pentaquark. In this short Letter, we point out that the dominant production mechanism for pentaquark consisting of a heavy quark is heavy quark fragmentation. We obtain a crude estimate on the fragmentation probability for charm quark into Θc0, based on the known fragmentation probabilities of charm quark into mesons and baryons: f(c¯→Θc0)≃(2–7)×10−3. Similarly, we also obtain the fragmentation probability for bottom quark into Θb+: f(b¯→Θb+)≃(5–20)×10−3. We also estimate the prospect of observing Θc0 and Θb+ at HERA, LEP, and Tevatron.