Heavy quark symmetry and the Skyrme model

Journal Article · Thu Sep 01 04:00:00 EDT 1994 · Physical Review, D (Particles Fields); (United States)

DOI:https://doi.org/10.1103/PhysRevD.50.3350· OSTI ID:7142816

Oh, Y ^[1]; Park, B ^[2]; Min, D ^[3]

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1. Department of Physics, National Taiwan University, Taipei, Taiwan 10764 (Taiwan, Province of China)
2. Department of Physics, Chungnam National University, Daejeon 305-764 (Korea, Republic of)
3. Center for Theoretical Physics and Department of Physics, Seoul National University, Seoul 151-742 (Korea, Republic of)

We present a consistent way of describing heavy baryons containing a heavy quark as bound states of an SU(2) soliton and heavy mesons. The resulting mass formula reveals the heavy quark symmetry explicitly. By extending the model to the orbitally excited states, we establish the generic structure of the heavy baryon spectrum. As anticipated from the heavy quark spin symmetry, the [ital c] factor denoting the hyperfine splitting constant [ital vanishes] and the baryons with the same angular momentum of light degrees of freedom form degenerate doublets. This approach is also applied to the pentaquark exotic baryons, where the conventional [ital c] factor no longer plays the role of the hyperfine constant. After diagonalizing the Hamiltonian of order [ital N][sub [ital c]][sup [minus]1], we get the degenerate doublets, which implies the vanishing of genuine hyperfine splitting.

• OSTI ID: 7142816
• Journal Information: Physical Review, D (Particles Fields); (United States), Journal Name: Physical Review, D (Particles Fields); (United States) Vol. 50:5; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

662240* -- Models for Strong Interactions-- (1992-)
662410 -- Properties of Baryons & Baryon Resonances-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANGULAR MOMENTUM
BARYONS
BOSONS
BOUND STATE
ELEMENTARY PARTICLES
ENERGY LEVELS
EXCITED STATES
FERMIONS
HADRONS
HYPERFINE STRUCTURE
LIE GROUPS
MASS FORMULAE
MESONS
NUCLEON-NUCLEON POTENTIAL
POSTULATED PARTICLES
POTENTIALS
QUARKS
QUASI PARTICLES
SKYRME POTENTIAL
SOLITONS
SU GROUPS
SU-2 GROUPS
SYMMETRY
SYMMETRY GROUPS