Rotational-vibrational coupling in the BPS Skyrme model of baryons

Abstract

We calculate the rotational-vibrational spectrum in the BPS Skyrme model for the hedgehog skyrmion with baryon number one. The resulting excitation energies for the nucleon and delta Roper resonances are slightly above their experimental values. Together with the fact that in the standard Skyrme model these excitation energies are significantly lower than the experimental ones, this provides strong evidence for the conjecture that the inclusion of the BPS Skyrme model is necessary for a successful quantitative description of physical properties of baryons and nuclei.

Latex, 9 pages. v2: some references added

References in corpus (7)

• Skyrmions, instantons and holography
• A BPS Skyrme model and baryons at large Nc
• Skyrmions and the alpha-particle model of nuclei
• Light Nuclei of Even Mass Number in the Skyrme Model
• Skyrmions with massive pions
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Cited by in corpus (11)

• Skyrmions with low binding energies
• Nuclear binding energies from a BPS Skyrme model
• Topological energy bounds in generalized Skyrme models
• Thermodynamics of the BPS Skyrme model
• Near BPS Skyrmions and Restricted Harmonic Maps
• Oscillons in a perturbed signum-Gordon model
• Radial vibrations of BPS skyrmions
• Time-Dependent BPS Skyrmions
• Roper resonances and quasi-normal modes of Skyrmions
• On the spin excitation energy of the nucleon in the Skyrme model
• Chiral Dirac-Born-Infeld solitons with SDiff symmetry