Showing papers in "Nuclear Physics in 1993"

TL;DR: In this paper, a natural relation between sigma models based on Calabi-Yau hypersurfaces in weighted projective spaces and Landau-Ginzburg models is found.

TL;DR: In this article, a version of the QCD-motivated "k⊥" jet-clustering algorithm for hadron-hadron collisions is proposed, which is invariant under boosts along the beam directions.

TL;DR: The complete quantum theory of covariant closed strings was constructed in detail in this article, where the nonpolynomial action is defined by elementary vertices satisfying recursion relations that give rise to Jacobi-like identities for an infinite chain of string field products.

TL;DR: In this paper, it was shown that the azimuthal dependence of the distribution of hadrons in a quark jet is a probe of the transverse spin of the quark initiating the jet.

TL;DR: In this article, the authors studied the stringy genus-one partition function of N = 2 SCFTs and derived the partition function for topological theory coupled to topological gravity.

TL;DR: In this paper, a table is given to replace the 1983 atomic mass table and the differences with the earlier table are briefly discussed and information is given of interest for the users of this table.

TL;DR: In this article, the scaled n-level distribution and scaled level spacing distribution for the small and large eigenvalues of various ensembles of random matrices are considered, and exact results for both these quantities are obtained for various special values of the parameters in the gaussian and Laguerre ensemble.

TL;DR: In this article, it was shown that correlation functions with logarithmic singularities imply the existence of additional operators in the theory which together with ordinary primary operators form the basis of the Jordan cell for the operator L0.

TL;DR: In this article, the authors construct a model in which four-dimensional chiral fermions arise on the boundaries of a five-dimensional lattice with free boundary conditions in the fifth direction.

TL;DR: In this paper, a Boltzmann-type collision integral for mixed neutrinos interacting with each other and with a medium is derived, which allows one to account for the simultaneous effects of neutrino oscillations in a medium and for the effects of collisions.

TL;DR: In this paper, the authors explore noncompact groups in the case of toroidal compactification both from the viewpoint of low-energy effective field theory, using the method of dimensional reduction, and from a viewpoint of the string theory world-sheet.

TL;DR: In this paper, the authors explore the possibility of finding an equivalent string representation of two-dimensional QCD, and develop the large N expansion of the QCD2 partition function on an arbitrary 2-dimensional euclidean manifold.

TL;DR: In this article, a method for the resummation of leading and next-to-leading large logarithms to all orders in QCD perturbation theory is described.

TL;DR: In this paper, a random matrix model was constructed that, in the large-N limit, reduces to the low-energy limit of the QCD partition function put forward by Leutwyler and Smilga.

TL;DR: In this article, the authors generalize this duality transformation to background with non-abelian isometries and show that this new transformation maps spaces with nonabelians to spaces that may have no isometria at all.

TL;DR: In this article, a general method for calculating the fully differential cross section for the production of jets at next-to-leading order in a hadron collider is described. But this method is based on a "crossing" of calculations with all partons in the final state.

TL;DR: This version of A = 16 diers from the published version is slightly revised in that it has corrected some errors discovered after the article went to press and Reference key numbers have been changed to the NNDC/TUNL format.

TL;DR: In this article, an algorithm for obtaining the power series in the external momentum of two-loop self-energy diagrams with arbitrary masses of the internal particles is examined, where the coefficients of the expansion are represented in terms of vacuum twoloop integrals which are calculated for general values of the masses.

TL;DR: In this paper, an improved iterative scheme for calculating higher genus contributions to the multi-loop (or multi-point) correlators and the partition function of the hermitian one matrix model was proposed.

TL;DR: In this article, the relation between partonic distributions near the phase space boundary and Wilson loop expectation values calculated along paths partially lying on the light-cone is discussed, and it is shown that the universal form of the splitting function for large x originates from the cusp anomalous dimension of Wilson loops.

TL;DR: In this article, the QCD-corrected effective hamiltonian for the b → se+e− and b → sγ decays is evaluated including the next-to-leading logarithmic effects which considerably weaken the qCD corrections to both decays.

TL;DR: In this paper, it is shown that the hierarchy in the masses and mixing of quarks is a result of a horizontal symmetry, and that the smallness of various parameters is related to their suppression by high powers of a scale of new physics.

TL;DR: In this paper, the authors discuss renormalisation-group improvement of the effective potential both in general and in the context of 0(N) scalar and the Standard Model and find that absolute stability of the electroweak vacuum implies that m11~ l.95m~ −189GeV, for a3(Mz) = 0.11.

TL;DR: In this article, strong interaction O( α s ) corrections to rare K-and B-decays dominated by Z 0 -penguins and box-diagrams with virtual top quark exchanges for an arbitrary top-quark mass were calculated.

TL;DR: In this article, a detailed analysis on the nucleon decay in the minimal supersymmetric SU(5) grand unified model is presented, showing that the decay rate of the Higgs multiplet does not blow up below the gravitational scale (2.4 × 1018 GeV) even with the largest possible value of MHC.

TL;DR: In this paper, the authors developed a systematic analysis of quark mass matrices which, starting with the measured values of the quark masses and mixing angles, allows for a model-independent search for all possible (symmetric or hermitian) mass matrix structures having texture zeroes at the unification scale.

TL;DR: In this paper, the authors apply renormalization group techniques developed in the study of phase transitions to calculate the critical exponents which characterize the scaling behaviour of universal quantities near the critical point.

TL;DR: In this article, the authors generalize the known method for explicit construction of mirror pairs of (2,2)-superconformal field theories, using the formalism of Landau-Ginzburg orbifolds.

TL;DR: In this article, the complete O(αS) QCD corrections to the virtual-photon cross sections for heavy-flavour production in deep-elastic electron-proton scattering are presented.

TL;DR: In this article, a complete geometrical description of the QCD partition function on an arbitrary manifold is given in terms of maps from a two-dimensional orientable surface onto the target space.