Search for the D∗D¯∗molecular state Zc(4000)in the reaction B−→J/ψρ^0K^−

Based on the prediction of a D^∗D^¯∗molecular state Zc(4000)with isospin I=1 in the coupled channel approach,we suggest the search for this state in the reaction B−→J/ψρ0K−.By considering the final state interactions of J/ψρand D^∗0D^¯∗0 and the contribution from the K1(1270)resonance,we observed that the J/ψρmass distribution shows a peak around 4000 MeV,which might be associated with the D^∗D^¯∗molecular state Zc(4000).The search for Zc(4000)in the reaction B−→J/ψρ^0K−is critical for understanding the internal structures of exotic hadrons.Our predictions can be tested by the Belle II and LHCb in future studies.