2013/05/21 by Guo‐Li Wang, Guo-Li Wang, Yue Jiang +6
Physics and Astronomy · #Nuclear physics research studies #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ex #hep-ph
paper · pdf · doi:10.48550/arxiv.1305.4756
12 pages, 3 figures
arxiv created 2013/05/21 · arxiv updated 2013/05/22
The new particle D*s1(2700)+ has stimulated many attentions. There are different assignments of its inherent properties. It may be a 23S1, 13D1 or the mixture of 23S1-13D1 c s 1- state. By considering its mass, decay modes, full width, production rate, and comparing with current experimental data, we point out that there is another more reasonable assignment: D*s1(2700)+ could be identified as two resonances, one of which is a 23S1 state, another is a 1D state, and both are c s 1- states. The two states have very close masses, which are around 2700 MeV, and both have broad decay widths. So in experiments, the overlapping of DK or D^*K invariant mass distribution coming from their decays is found, but the current experiments could not distinguish these two resonances and reported one particle.