Mesonic decay of 5ΛHe with quark-model-based hypernuclear wave function

1993 ◽  
Vol 556 (4) ◽  
pp. 531-551 ◽  
Author(s):  
U. Straub ◽  
J. Nieves ◽  
A. Faessler ◽  
E. Oset
Keyword(s):  
Wave Function ◽  
Quark Model ◽  
Mesonic Decay ◽  
Model Based

scholarly journals STRUCTURE OF LIGHT AND HEAVY PENTAQUARKS

2005 ◽  
Vol 20 (08n09) ◽  
pp. 1797-1802 ◽  
Author(s):  
FL. STANCU
Keyword(s):  
Variational Method ◽  
Hyperfine Interaction ◽  
Quark Model ◽  
Constituent Quark ◽  
Constituent Quark Model ◽  
Positive Parity ◽  
Model Based ◽  
Quantum Numbers ◽  
The Masses

Light and heavy pentaquarks are described within a constituent quark model based on a spin-flavor hyperfine interaction. In this model the lowest state acquires positive parity. The masses of the light antidecuplet members are calculated dynamically using a variational method. It is shown that the octet and antidecuplet states with the same quantum numbers mix ideally due to SU (3)F breaking. Masses of the charmed antisextet pentaquarks are predicted within the same model.

scholarly journals Quark-model based study of the triton binding energy

2002 ◽  
Vol 65 (3) ◽  
Author(s):  
B. Juliá-Díaz ◽  
J. Haidenbauer ◽  
A. Valcarce ◽  
F. Fernández
Keyword(s):  
Binding Energy ◽  
Quark Model ◽  
Triton Binding Energy ◽  
Model Based

COMPLEXITY OF HADRONIC AMPLITUDES VIA QUARK LOOPS

1993 ◽  
Vol 02 (01) ◽  
pp. 219-232 ◽  
Author(s):  
A.N. MITRA ◽  
I. SANTHANAM ◽  
A. ESSAGHOLIAN
Keyword(s):  
Wave Function ◽  
Dispersion Relation ◽  
Imaginary Part ◽  
Vertex Function ◽  
Proper Understanding ◽  
The Real ◽  
Loop Integral ◽  
Model Based ◽  
Structure Formula ◽  
Transition Amplitudes

The structure of hadronic transition amplitudes h→h′+h″ via quark triangle loops is investigated in terms of hadron quark vertex functions [Formula: see text], using for illustration the case of the ρ→ππ transition. A Bethe-Salpeter model based on the Covariant-Instantaneity-Ansatz (CIA) for its kernel which provides an exact interconnection between the 3D and 4D forms the BS wave function, determines the structure [Formula: see text]. The nonlocality feature inherent in the vertex function causes the imaginary part of gρππ calculated from the loop integral to be generally different from its dispersion relation value which would be obtained from analyticity of gρππ in the ρ-mass. Pending a proper understanding of this nonlocality (associated with confining interactions) only the real part of gρππ is found unambiguous while the imaginary part is model-dependent.

scholarly journals HYPERFINE MIXING AND THE SEMILEPTONIC DECAYS OF DOUBLE-HEAVY BARYONS IN A QUARK MODEL

2009 ◽  
Vol 24 (13) ◽  
pp. 2401-2413 ◽  
Author(s):  
W. ROBERTS ◽  
MUSLEMA PERVIN
Keyword(s):  
Wave Function ◽  
Decay Rate ◽  
Quark Model ◽  
Semileptonic Decay ◽  
Semileptonic Decays ◽  
Wave Functions ◽  
Total Rate ◽  
Spin Wave Function ◽  
Full Wave ◽  
Heavy Baryons

The semileptonic decays of the lowest-lying double-heavy baryons are treated in a quark model. For the Ξbb, hyperfine mixing in the spin wave function leaves the total rate for decay into the lowest lying daughter baryons essentially unchanged, but changes the relative rates into the Ξbc and [Formula: see text]. The same pattern is obtained in the decays of the Ωbb. For the Ξbc, this mixing leads to factor of about 17 suppression in the decay rate to the [Formula: see text] when wave functions truncated to the largest components are used, but the total semileptonic decay rate of the parent baryon remains essentially unchanged. For the Ωbc, the decay to the [Formula: see text] is suppressed by a factor of more than 25 from the unmixed case. When the full wave functions are used, the large suppression of the decays to the [Formula: see text] and [Formula: see text] persists.

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