A new look at the Y tetraquarks and [Formula omitted] baryons in the diquark model

• Published in: The European physical journal. C, Particles and fields Vol. 78; no. 1
• Main Authors: Ali, Ahmed, Maiani, Luciano, Borisov, Anatoly V, Ahmed, Ishtiaq, Aslam, M. Jamil, Parkhomenko, Alexander Ya, Polosa, Antonio D
• Format: Journal Article
• Language: English
• Published: Springer 15-01-2018
• ISSN: 1434-6044; 1434-6052
• DOI: 10.1140/epjc/s10052-017-5501-6

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 systems such as P-wave charmonia and the newly discovered [Formula omitted] 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 [Formula omitted] diquarkonia, whose [Formula omitted] 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.