Regular Article - Theoretical Physics
Tetraquark states in the bottom sector and the status of the (10890) state
Department of Physics, Sardar Patel University, Vallabh Vidyanagar, 388120, Gujarat, India
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Accepted: 30 May 2016
Published online: 27 June 2016
We have performed an exploratory study of bottom tetraquarks () in the diquark–antidiquark framework with the inclusion of spin hyperfine, spin–orbit and tensor components of the one gluon exchange interaction. Our focus here is on the (10890) and other exotic states in the bottom sector. We have predicted some of the bottom counterparts to the charm tetraquark candidates. Our present study shows that if and are diquark–diantiquark states then they have to be first radial excitations only and we have predicted the state as first radial excitation of tetraquark state (10.143–10.230). We have identified state with as being the analog of . The observation of the will provide a deeper insight into the exotic hadron spectroscopy and is helpful to unravel the nature of the states connected by the heavy quark symmetry. We particularly focus on the lowest P-wave states with by computing their leptonic, hadronic, and radiative decay widths to predict the status of the still controversial (10890) state. Apart from this, we have also shown here the possibility of mixing of P-wave states. In the case of mixing of the state with different spin multiplicities, we found that the predicted masses of the mixed P states differ from the (10890) state only by MeV energy difference, which can be helpful to resolve further the structure of (10890).
© The Author(s), 2016