Spectroscopy and production of doubly charmed tetraquarks

Abstract

We discuss the production of the exotic doubly-charmed tetraquark mesons ${\mathrm{T}}_{\mathrm{c}\mathrm{c}}(\mathrm{c}\mathrm{c}\bar{\mathrm{u}}\bar{\mathrm{d}})$ from electron-positron collisions. ${\mathrm{T}}_{\mathrm{c}\mathrm{c}}(\mathrm{c}\mathrm{c}\bar{\mathrm{u}}\bar{\mathrm{d}})$ is a compact exotic hadron whose binding energy is provided by the diquark correlations. We evaluate the production cross section in the electron-positron collisions using the nonrelativistic QCD framework, and investigate the difference of the production cross section for different color configurations in two charm quarks (antitriplet and sextet), where the mixing of different configurations is suppressed in the heavy quark limit. The total cross section is estimated by modeling the nonperturbative fragmentation process of the charm quark pair into the tetraquark by the wavefunction of the tetraquark and the probability of picking up the light quarks. We find that the internal color configurations are distinguishable by the qualitative features of the differential cross sections which are independent of the nonperturbative matrix elements.

arXiv comment38 pages, 7 figures

References in corpus (2)

• Exotics: Heavy Pentaquarks and Tetraquarks
• Observation of the doubly charmed baryon ${\Xi }_{cc}^{++}$

Cited by in corpus (10)

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• A survey of heavy-heavy hadronic molecules
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• Coupled-channel approach to $T_{cc}^{+}$ including three-body effects
• Bound state formation in the $DDK$ system
• Strong decays of double-charmed pseudoscalar and scalar $cc\overline{u}\overline{d}$ tetraquarks
• Hadronic effects on the $cc\bar{q}\bar{q}$ tetraquark state in relativistic heavy ion collisions
• Light pseudoscalar meson and doubly charmed baryon scattering lengths with heavy diquark-antiquark symmetry
• Further signatures to support the tetraquark mixing framework for the two light-meson nonets
• Masses of the doubly heavy tetraquarks in a constituent quark model