Mass spectra of strange double charm pentaquarks with strangeness S =-1

The observation of the T-c(s)over bar(2900) indicates the potential existence of strange double charm pentaquarks based on the heavy antidiquark symmetry. We systematically study the mass spectra of strange double charm pentaquarks with strangeness S = -1 in both molecular and compact structures for quantum numbers J(P) = 1/2(-), 3/2(-), 5/2(-). By constructing the interpolating currents, the mass spectra can be extracted from the two-point correlation functions in the framework of QCD sum rule method. In the molecular picture, we find that the Xi(c)'double dagger D*double dagger, Xi(c)*D-double dagger *double dagger,( )Xi(cc)*double dagger (K)over bar*0, and Omega(cc)*double dagger rho double dagger may form molecular strange double charm pentaquarks. In both pictures, the masses of the J(P) = 1/2(-); 3/2(-) pentaquarks locate within the 4.2-4.6 GeV and 4.2-4.5 GeV regions, respectively. As all of them are above the thresholds of their strong decay channels, they behave as a broad state, making them challenging to be detected experimentally. On the other hand, the strange double charm pentaquark with JP = 5/2(-) lies below its strong decay channel, which may be a very narrow state and easy to identify experimentally. The best observed channel is its semileptonic decay to double charm baryon. As the result, we strongly suggest experiments to search for JP = 5/2(-) strange double charm pentaquarks first.