Regular Article - Theoretical Physics
Molecular states from and interactions
Department of Physics and Institute of Theoretical Physics, Nanjing Normal University, 210097, Nanjing, China
Accepted: 10 December 2020
Published online: 22 December 2020
In this work, we preform a systematic investigation about hidden heavy and doubly heavy molecular states from the and interactions in the quasipotential Bethe–Salpeter equation (qBSE) approach. With the help of Lagrangians with heavy quark and chiral symmetries, interaction potentials are constructed within the one-boson-exchange model in which we include the , , , and exchanges, as well as or exchange. Possible bound states from the interactions considered are searched for as the pole of scattering amplitude. The results suggest that experimentally observed states, , , , and , can be related to the , , , and interactions with quantum numbers , respectively. The interaction is also attractive enough to produce a pole with which is related to the X(3872). Within the same theoretical frame, the existence of and molecular states with are predicted. The possible molecular states with and and their bottom partners are also suggested by the calculation. In the doubly heavy sector, no bound state is produced from the interaction while a bound state is found with from interaction. The interaction produces three molecular states with , and .
© The Author(s) 2020
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