Journal
PHYSICAL REVIEW D
Volume 98, Issue 5, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.98.053005
Keywords
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Funding
- National Natural Science Foundation of China [11575110, 11655002, 11705092]
- Natural Science Foundation of Shanghai [15DZ2272100, 15ZR1423100]
- Natural Science Foundation of Jiangsu [BK20171471]
- Young Thousand Talents Plan
- Key Laboratory for Particle Physics, Astrophysics and Cosmology, Ministry of Education
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In light of the recent discovery of the Xi(++)(CC) by the LHCb Collaboration, we study the stable doubly heavy tetraquarks. These states are compact exotic hadrons which can be approximated as the diquark-antidiquark correlations. In the flavor SU(3) symmetry, they form a SU(3) triplet or antisextet. The spectra of the stable doubly heavy tetraquark states are predicted by the Sakharov-Zeldovich formula. We find that the T-bb (u) over bar(d) over bar(-) (3) is about 73 MeV below the BB* threshold at SET I. We then study the semileptonic and nonleptonic weak decays of the stable doubly heavy tetraquark states. The doubly heavy tetraquark decay amplitudes are parametrized in terms of flavor SU(3)-irreducible parts. Ratios between decay widths of different channels are also derived. At the end, we collect the Cabibbo allowed two-body and three-body decay channels, which are most promising to search for the stable doubly heavy tetraquark states at the LHCb and Belle II experiments.
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