Showing papers in "Nuclear Physics in 1989"

TL;DR: In this article, the Verlinde formula is derived from the partition function of a conformal field theory in an annulus, and a simple derivation of the vertex formula is given.

TL;DR: In this article, the strong interactions of low-lying meson resonances (spin ⩽ 1) with the octet of pseudoscalar mesons ( π, K, η ) are considered to lowest order in the derivative expansion of chiral SU(3).

TL;DR: In this article, the theory of 2D quantum gravity in the usual conformal gauge was solved and the critical exponents for all genera were obtained for the supersymmetric case.

TL;DR: In this paper, the properties of chiral operators in N = 2 superconformal theories were investigated under a one-parameter family of twists generated by the U(1) current.

TL;DR: In this article, the authors investigate some aspects of thermodynamics and cosmology for superstrings and show that the thermodynamic description of strings is sound only for strings propagating in spaces where all the spatial directions are compact.

TL;DR: In this paper, the authors discuss the canonical quantization of the Chern-Simons-Witten theory on several interesting surfaces and the connection to the related two-dimensional theory is illustrated from different points of view.

TL;DR: An investigation of the spin structure of the proton in deep inelastic scattering of polarised muons on polarised protons was performed in this article, where the spin was investigated in the context of the deep scattering process of polarized muons.

TL;DR: In this paper, a general method to exponentiate leading and next-to-leading logarithms to all orders in perturbation theory is developed and a complete formula for the large N -moments is given and shown to agree with previous two-loop calculations.

TL;DR: In this paper, the one-particle inclusive differential cross section for heavy quark production in hadronic collisions, including the O(αS3) radiative corrections, is presented.

TL;DR: In this paper, it was shown that all of the usual programs for the operator expansion can be performed in terms of string operators on the light cone; namely, the separation of contributions from large and small distances, the study of higher twist corrections and the renormalization group analysis.

TL;DR: The supersymmetric quartic effective action for the heterotic string which follows from the supersymmetrization of the Yang-Mills and Lorentz Chern-Simons forms was presented in this paper.

TL;DR: In this article, a new class of unitary N = 2 superconformal theories, including those with central charge > 3, is constructed via the coset space (G/H) method applied to super-Kac-Moody algebras.

TL;DR: In this article, a BRST charge was introduced in a series of Coulomb gas models in two dimensions, and it was shown that these models, once restricted to BRST states, are equivalent to the minimal two-dimensional conformal invariant models of Belavin, Polyakov and Zamolodchikov.

TL;DR: In this article, the authors investigated the chiral symmetry breaking, its restoration and related quantities at finite density and temperature in the Nambu-Jona-Lasinio model and showed that a first-order transition exists at zero and low temperatures.

TL;DR: In this article, the authors developed new techniques extending the standard QCD sum-rules approach to hadron properties in alternating external fields and derived the amplitudes for the decay σ + → pγ to properties of the QCD vacuum.

TL;DR: In this paper, the cross section of the multigluon scattering process is computed using recursion in the number of gluons, and a new algebraic identity is presented which allows for complete reduction of the subamplitudes to a minimal basis, leading to a considerable increase in the efficiency of the algorithm.

TL;DR: In this paper, the authors derive a local renormalizable action for non-abelian gauge theories, expressing the restriction of the domain of the functional integral to the interior of the Gribov horizon, and show that the divergences may be absorbed by field and coupling constant renormalization.

TL;DR: In this article, a new type-I superstring construction is proposed in which orbifold groups can also act on the ghost fields, and the crucial role of BRST invariance in the construction is analyzed.

TL;DR: In this paper, a geometrical interpretation of the appearance of SL(2, R ) symmetry in the 2D quantum gravity is given in terms of the theory of the coadjoint orbits of the Virasoro group.

TL;DR: In this paper, the authors derive the asymptotic behavior of elastic meson-meson and baryon-baryon scattering at high energy and fixed angle, and show that the complete amplitudes should be computable perturbatively down to the dimensional counting power, in terms of hadronic wave functions.

TL;DR: In this article, it was shown that if the quantum theory is formulated on space-times that do not admit classical solutions, it is dominated by planckian distances, and if formulated on time-times on which a classical solution is possible, quantum theory escapes from the Planckian domain into the classical regime.

TL;DR: In this paper, it was shown that the quantum mechanical hamiltonians of a class of supersymmetric matrix models have a continuous spectrum starting at zero, and that supermembranes (which can be regarded as a limit of such models) have no mass gap.

TL;DR: In this paper, the leading coefficients of the low temperature expansion for the pressure and for the quark condensate were calculated up to a temperature of the order of 150 MeV and an estimate for the value of the critical temperature at which the chiral phase transition takes place.

TL;DR: In this article, a detailed study of the gauged Wess-Zumino-Witten models is presented, and the models are shown to be conformal field theories realizing the Goddard-Kent-Olive coset construction.

TL;DR: In this paper, the authors discuss the problems associated with the essential nonlocality of all string field actions in light cone theories and show that these problems are invisible to perturbative analysis.

TL;DR: In this article, the duality symmetry of closed strings with d compactified dimensions is reformulated in geometrical terms as an invariance under a particular Z2 transformation acting on (constant) metric, torsion and gauge background fields.

TL;DR: In this paper, a traversable wormhole is constructed by surgically grafting two Schwarzschild spacetimes together in such a way that no event horizon is to form, which concentrates a non-zero stress energy on the boundary layer between the two asymptotically flat regions.

TL;DR: In this article, a formula for the semileptonic decay rate of heavy quarks was derived which includes first-order gluon corrections, the W-boson propagator effects and the non-zero mass of the quark produced in the decay process.

TL;DR: A meson exchange model for the hyperon-nucleon (AN, ΣN) interaction is presented in this paper, which is constructed along the same guidelines as those applied in the Bonn model for NN interaction.

TL;DR: In this paper, the full O(αs3) QCD corrections to one particle inclusive cross section and jet production within a small opening angle δ at large transverse momenta for all partonic subprocesses were evaluated.