منابع مشابه
Quantum-chromodynamic evolution of six-quark states.
The evolution of six-quark color-singlet state distribution amplitudes is formulated as an application of perturbative quantum chromodynamics to nuclear wave functions. We derive and solve a set of coupled evolution equations for the deuteron S-wave amplitude. The solution of the evolution equations leads to a general matrix representation of anomalous dimensions which can be used to analyze th...
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The phase time in quantum tunneling can be disentangled into a dwell time plus a term arising due to the interference of the reflected and incident waves in front of the barrier. The interference term dominates at low energies and as E → 0, this term and hence the phase time becomes singular. With the s-wave motion in three dimensions being equivalent to that of a one-dimensional motion in the ...
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We use heavy quark effective theory ~HQET! techniques to parametrize certain nonperturbative effects related to quantum fluctuations that put both heavy quarks and antiquarks in quarkonium almost on shell. The large off-shell momentum contributions are calculated using Coulomb-type states. The almost on-shell momentum contributions are evaluated using an effective ‘‘chiral’’ Lagrangian which in...
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In the framework of the SU(3) chiral quark model, the S−wave baryon-baryon bound states are investigated. It is found that according to the symmetry character of the system and the contributions from chiral fields, there are three types of bound states. The states of the first type, such as [ΩΩ] (0,0) and [Ξ * Ω] (0,1/2) are deeply bound dibaryon with narrow widths. The second type states, [Σ *...
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ژورنال
عنوان ژورنال: Nuclear Physics B
سال: 1979
ISSN: 0550-3213
DOI: 10.1016/0550-3213(79)90311-0