The suggestion on the search for 1~+ exotic hybrid in a particular J/T/J decay process has been presented. We give the moment expressions for the cases of the boson resonance X with various spin-parity J PxC produced in this J/ip decay process in terms of the generalized moment analysis method. The result shows that using these moments we can identify the 1~+ exotic hybrid produced in this kind of J/tji decay process except for some special cases.
Mid-story isolation structure is developing from base isolation structures. As a complex structural system, the work mechanism of base isolation structure is not entirely appropriate for mid-story isolation structure, and the prolonging of structural natural period may not be able to decrease the seismic response of substructure and superstructure simultaneously. In this paper, for a four-story steel frame model, whose prototype first natural period is about 1s without seismic isolation design, the seismic responses and isolation effectiveness of mid-story isolation system with lead rubber bearing are studied experimentally by changing the location of isolation layer. Respectively, the locations of isolation layer are set at bottom of the first story, top of the first story, top of the second story and top of the third story. The results show that mid-story isolation can reduce seismic response in general, and substructure acceleration may be amplified.
The decay process , where and P are the proton, antiproton and pseudoscalar states, respectively, has been studied in terms of the angular distribution and the generalized moment analysis methods. The result shows that we can identify the spin, but cannot determine the parity of the baryon resonance state X produced in the process .
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