Quark Models

Rosner, Jonathan L.

doi:10.1007/978-1-4684-3938-0_1

Cited by 4 publications

(4 citation statements)

References 183 publications

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“…3 we present the spectra of stable B = -1 hyperons as obtained in the bound state model when using the parameter values lead to the correct empirical values for the nucleon and A 33 resonance for the cases of m~ = 0 and m~ = 138 MeV. For comparison we also show the spectra obtained in the bag model [34] and in a potential quark model [35]. Once again, apart from the ground state overbinding problem, the agreement between our predictions and those of models where quark are explicitly present is remarkably good.…”

Section: The Bottom Hyperonsmentioning

confidence: 93%

The energy levels of the heavy flavour baryons in the topological soliton model

Rho

Riska

Scoccola³

1992

Z. Physik A - Hadrons and Nuclei

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The energy levels of the charm and bottom as well as the mixed flavour hyperons are calculated with the model in which the hyperons are described as bound states of a topological S U(2) soliton and K-, D-and B-mesons. The spectra are obtained in a modified version of the Skyrme model where the chiral symmetry breaking term in the Lagrangian density is modified so as to incorporate the different values of the decay constants of the mesons of different flavour. The predicted strange and charmed hyperon spectra are in very good agreement with the empirical values, while the bottom hyperon energies that are more sensitive to the short range dynamics are somewhat below the empirical values. The predicted hyperfine spectra are remarkably close to those obtained with the constituent quark model, more or less independently of the short-distance properties of the effective Lagrangian. We suggest that this feature reflects the presence of an induced nonabelian gauge potential generated by the interplay between "fast" and "slow" degrees of freedom in the meson-soliton system.

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Section: The Bottom Hyperonsmentioning

confidence: 93%

The energy levels of the heavy flavour baryons in the topological soliton model

Rho

Riska

Scoccola³

1992

Z. Physik A - Hadrons and Nuclei

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“…Considering the great success of the quark model in describing the spectrum and properties of the elementary particles (Rosner, 1981), and of the parton model in accounting for deep-inelastic scattering of leptons from nucleons (Yan, 1976), one could hardly regard such an implication as controversial. Nevertheless, the observation of direct photons would be important, because such data could provide a new probe for investigating the substructure of hadrons and lead to a more thorough understanding of the nature of the hadronic constituents and their interactions.…”

Section: A Introductionmentioning

confidence: 99%

Direct-photon production in high-energy collisions

1984

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“…The magnetic moment μ + is taken to be 1 and the ratio of magnetic moments μ 0 / μ + is calculated according to Refs. [138][139][140] .…”

Section: Methodsmentioning

confidence: 99%

Study of the doubly charmed tetraquark $${{{{{{\rm{T}}}}}}}_{{{{{{\rm{c}}}}}}{{{{{\rm{c}}}}}}}^{+}$$

Aaij¹,

Abdelmotteleb²,

Beteta³

et al. 2022

Nat Commun

190

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Quantum chromodynamics, the theory of the strong force, describes interactions of coloured quarks and gluons and the formation of hadronic matter. Conventional hadronic matter consists of baryons and mesons made of three quarks and quark-antiquark pairs, respectively. Particles with an alternative quark content are known as exotic states. Here a study is reported of an exotic narrow state in the D0D0π+ mass spectrum just below the D*+D0 mass threshold produced in proton-proton collisions collected with the LHCb detector at the Large Hadron Collider. The state is consistent with the ground isoscalar $${{{{{{\rm{T}}}}}}}_{{{{{{\rm{c}}}}}}{{{{{\rm{c}}}}}}}^{+}$$ T c c + tetraquark with a quark content of $${{{{{\rm{c}}}}}}{{{{{\rm{c}}}}}}\overline{{{{{{\rm{u}}}}}}}\overline{{{{{{\rm{d}}}}}}}$$ c c u ¯ d ¯ and spin-parity quantum numbers JP = 1+. Study of the DD mass spectra disfavours interpretation of the resonance as the isovector state. The decay structure via intermediate off-shell D*+ mesons is consistent with the observed D0π+ mass distribution. To analyse the mass of the resonance and its coupling to the D*D system, a dedicated model is developed under the assumption of an isoscalar axial-vector $${{{{{{\rm{T}}}}}}}_{{{{{{\rm{c}}}}}}{{{{{\rm{c}}}}}}}^{+}$$ T c c + state decaying to the D*D channel. Using this model, resonance parameters including the pole position, scattering length, effective range and compositeness are determined to reveal important information about the nature of the $${{{{{{\rm{T}}}}}}}_{{{{{{\rm{c}}}}}}{{{{{\rm{c}}}}}}}^{+}$$ T c c + state. In addition, an unexpected dependence of the production rate on track multiplicity is observed.

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Quark Models

Cited by 4 publications

References 183 publications

The energy levels of the heavy flavour baryons in the topological soliton model

The energy levels of the heavy flavour baryons in the topological soliton model

Direct-photon production in high-energy collisions

Study of the doubly charmed tetraquark $${{{{{{\rm{T}}}}}}}_{{{{{{\rm{c}}}}}}{{{{{\rm{c}}}}}}}^{+}$$

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