Z (4430) and a new paradigm for spin interactions in tetraquarks
By L. Maiani, F. Piccinini, A. Polosa, V. Riquer. 2014
227 citations recorded by the source corpus.
Following the recent confirmation of the Z+(4430) resonance with J^{PG}=1^{++}, we have re-examined the model of S- and P-wave tetraquarks. We propose a `type-II' diquark-antidiquark model which shows to be very effective at producing a simple and comprehensive picture of the J^{PG}=1^{++} and 1^{--} sectors of the recently discovered charged tetraquarks and of the observed Y resonances. The model is still faced with the unresolved difficulty of explaining why some states seem to have incomplete isospin multiplets.
Subfields: Nuclear and High Energy Physics, Spectroscopy
View Paper: https://www.semanticscholar.org/paper/8e23cc99acc7d90c7cdea0475959b00c5e5c7de2
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In Nuclear and High Energy Physics
- Alessandro Pilloni
- A. Esposito
- J. Lange
- S. Stone
- A. Ali
- Vladimir Vava Gligorov
- Jure Zupan
- Ediotors A. Cerri
In Spectroscopy
Citations in the corpus
- Exotics: Heavy pentaquarks and tetraquarks (2017, methodology): “re is no consensus on their names. We use the symbols X J for JPC = J++, Y for 1 , and Zfor 1+ states. Thus, the tetraquarks with the following diquark-spin and angular momentum Jhave the Pauli forms [340]: j0 Q ;0 ; 0 Ji = 0 0; j1 Q ;1 ; 0 Ji = 1 p 3 i i; j0 Q ;1 ; 1 Ji = 0 i; j1 Q ;0 ; 1 Ji = i 0;”
- The XYZ states: Experimental and theoretical status and perspectives (2019, background): “It is therefore reasonable that the mass difference between spin-1 and spin-0 cq-diquarks, where c (q) denotes the charm (a light) quark, is within 120 MeV [189], fixed to the mass difference of Zc(3900) and Zc(4020), found to be of the order of the D-D∗ mass difference.”
- Opportunities in Flavour Physics at the HL-LHC and HE-LHC (2018, background): “The Z(′) c and Z (′) b are predicted by the diquarkonium model as part of the [cq][c̄q̄] spectrum [461, 624].”
- Multiquark Resonances (2016, methodology): “This is the main assumption in [8] and, as we will see, it gives the right mass pattern for the X,Zc,Z c system.”