Bound-state corrections to J/ψ production from almost real photons are calculated in the colour-singlet model. A systematic, gauge-invariant, theory of hard quarkonium processes is used upto O(v2), where v is the relative velocity of the quarks. The internal structure of the meson is characterised by two parameters, ǫB/M and ∇2φ(0)/M2φ(0), in addition to the usual wavefunction at the origin φ(0...

We construct explicit bound state wave functions and bound state energies for certain N{ body Hamiltonians in one dimension that are analogous to N{electron Hamiltonians for (three-dimensional) atoms and monatomic ions.

For the Schrr odinger operator on the half line we prove the following results: the mapping from real compactly supported potentials to the associated Jost functions (in some class of entire functions) is one-to-one and onto. Moreover, we prove that such potential is uniquely determined by its bound states and resonances.

We study completely asymmetric two-channel exclusion processes in one dimension. It describes a two-way traffic flow with cars moving in opposite directions. The interchannel interaction makes cars slow down in the vicinity of approaching cars in the other lane. Particularly, we consider in detail the system with a finite density of cars on one lane and a single car on the other. When the inter...

The past leaves the surprising experimental successes of the simple constituent quark model to be expained by QCD. Surprising agreement with experiment from simple Sakharov-Zeldovich model (1966) having quarks with effective masses and hyperfine interaction. Nambu’s (1966) Colored quarks with gauge gluons gave mass spectrum with only qqq and q̄ bound states. The future opens the way to new insig...

D-44227 Dortmund nucleus (Ohtsubo et al., 1989; Bischoff and Ponstingl, Germany 1991a; Renault et al., 1998). This differential localization †Zentrum für Molekulare Biologie of the regulators of Ran’s nucleotide-bound state should Universität Heidelberg thus result in a steep RanGTP gradient across the nuD-69120 Heidelberg clear envelope with a high concentration in the nucleus Germany and very...