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[[fileno]]2010134010065[[department]]物理