A new look at the Y tetraquarks and Ωc baryons in the diquark model

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 Ω c baryons, analysed recently in th...

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Bibliographic Details
Published in:The European physical journal. C, Particles and fields Particles and fields, 2018, Vol.78 (1), p.1-13
Main Authors: Ali, Ahmed, Maiani, Luciano, Borisov, Anatoly V., Ahmed, Ishtiaq, Aslam, M. Jamil, Parkhomenko, Alexander Ya, Polosa, Antonio D., Rehman, Abdur
Format: Article
Language:English
Subjects:
Astronomy
Astrophysics and Cosmology
Baryons
Charm (particle physics)
Elementary Particles
Hadrons
Heavy Ions
Mathematical models
Measurement Science and Instrumentation
Nuclear Energy
Nuclear Physics
Physics
Physics and Astronomy
Quantum Field Theories
Quantum Field Theory
Quantum numbers
Regular Article - Theoretical Physics
String Theory
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Summary: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 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.
ISSN:1434-6044
1434-6052
DOI:10.1140/epjc/s10052-017-5501-6