A New Look at the $Y$ Tetraquarks and $Ω_c$ Baryons in the Diquark Model

Ahmed Ali; Luciano Maiani; Anatoly V. Borisov; Ishtiaq Ahmed; M. Jamil Aslam; Alexander Ya. Parkhomenko; Antonio D. Polosa; Abdur Rehman

doi:10.1140/epjc/s10052-017-5501-6

arXiv · 1708.04650

A New Look at the $Y$ Tetraquarks and $Ω_c$ Baryons in the Diquark Model

Ahmed Ali·Luciano Maiani·Anatoly V. Borisov·Ishtiaq Ahmed·M. Jamil Aslam·Alexander Ya. Parkhomenko·Antonio D. Polosa·Abdur Rehman

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Abstract

We analyze the hidden charm $P$-wave tetraquarks in the diquark model, using an effective Hamiltonian incorporating the dominant spin-spin, spin-orbit and tensor interactions. We compare with other $P$-wave system such as $P$-wave charmonia and the newly discovered $Ω_c$ baryons, analysed recently in this framework. Given the uncertain experimental situation on the $Y$ states, we allow for different spectra and discuss the related parameters in the diquark model. In addition to the presently observed ones, we expect many more states in the supermultiplet of $L=1$ diquarkonia, whose $J^{PC}$ quantum numbers and masses are worked out, using the parameters from the currently preferred $Y$-states pattern. The existence of these new resonances would be a decisive footprint of the underlying diquark dynamics.

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Ahmed Ali, Luciano Maiani, Anatoly V. Borisov, Ishtiaq Ahmed, M. Jamil Aslam, Alexander Ya. Parkhomenko, Antonio D. Polosa, Abdur Rehman. 2017-12-21. A New Look at the $Y$ Tetraquarks and $Ω_c$ Baryons in the Diquark Model. https://doi.org/10.1140/epjc%2Fs10052-017-5501-6

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