Confronting pentaquark photoproduction with new LHCb observations

13 Sep 2019  ·  Cao Xu, Dai Jian-ping ·

The newly measurement of production fractions of $P_c$ states by LHCb collaboration have put restriction on their branching ratios of $J/\psi p$ decay, thus constraining their photoproduction in $\gamma p\to J/\psi p$ reaction. We show the tension between LHCb results and the current experiments in search of $P_c$ photoproduction... We also find that the present information of branching ratios of $P_c\to J/\psi p$ has already confronted sharply with the models which study the nature of $P_c$. read more

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High Energy Physics - Phenomenology