Regular Article - Theoretical Physics
Open-charm tetraquark and open-bottom tetraquark
Department of Physics, National Taiwan University, 10617, Taipei, Taiwan, ROC
2 Physics Division, National Center for Theoretical Sciences, 30013, Hsinchu, Taiwan, ROC
3 INPAC, Shanghai Key Laboratory for Particle Physics and Cosmology, MOE Key Laboratory for Particle Physics, Astronomy and Cosmology, School of Physics and Astronomy, Shanghai Jiao Tong University, 200240, Shanghai, China
4 Department of Physics and Institute of Theoretical Physics, Nanjing Normal University, 210023, Nanjing, Jiangsu, China
5 Nuclear Science Division, Lawrence Berkeley National Laboratory, 94720, Berkeley, CA, USA
Accepted: 23 October 2020
Published online: 6 November 2020
Motivated by the LHCb observation of exotic states with four open quark flavors in the invariant mass distribution in the decay channel , we study the spectrum and decay properties of the open charm tetraquarks. Using the two-body chromomagnetic interactions, we find that the two newly observed states can be interpreted as a radial excited tetraquark with and an orbitally excited tetraquark with , respectively. We then explore the mass and decays of the other flavor-open tetraquarks made of and , which are in the or 15 representation of the flavor SU(3) group. We point that these two states can be found through the decays: , and . We also apply our analysis to open bottom tetraquark and predict their masses. The open-flavored can be discovered through the following decays: , , and .
© The Author(s) 2020
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Funded by SCOAP3.