Showing papers in "Nuclear Physics in 1986"

TL;DR: In this paper, the first two terms of the effective lagrangian were constructed in an expansion in powers of 1/Λ and studied systematically possible effects of new interactions such as anomalous magnetic moments, deviations from universality in weak interactions and rare processes.

TL;DR: In this paper, an attempt is made to interpret the interactions of bosonic open strings as defining a non-cummulative, associative algebra, and to formulate the classical non-linear field theory of such strings in the language of non-commulative geometry.

TL;DR: In this paper, it was shown how conformal invariance relates many numerically accessible properties of the transfer matrix of a critical system in a finite-width infinitely long strip to bulk universal quantities.

TL;DR: In this article, the BRST method is used to covariantly quantize superstrings, and in particular to construct the vertex operators for string emission as well as the supersymmetry charge.

TL;DR: In this article, the authors derive a formula which expresses any closed string tree amplitude in terms of a sum of the products of appropriate open string tree amplitudes, which is applicable to the heterotic string as well as to the closed bosonic string and type II superstrings.

TL;DR: In this paper, the conditions for spacetime supersymmetry of the heterotic superstring in background with arbitrary metric, torsion, Yang-Mills and dilaton expectation values are determined using the sigma model approach.

TL;DR: In this article, a modified Altarelli-Parisi equation expressing this recombination was given, and it was shown that recombination is very small compared to normal evolution in all interesting circumstances except that of nuclear shadowing.

TL;DR: In this paper, it was shown that generic Ricci-flat manifolds do not solve the modified equations, unless in addition the manifolds are Kahler (2 N -dimensional manifolds of SU( N ) holonomy).

TL;DR: In this article, the properties of Higgs bosons in a class of supersymmetric theories are described and Feynman rules for their couplings to the gauge bosons, fermions and scalars of the theory are presented.

TL;DR: In this paper, the theory of interacting heterotic strings is presented and vertex operators are derived in both the bosonic and fermionic formulations of the theory and are shown to be consistent with gauge invariance, Lorentz invariance and supersymmetry.

TL;DR: In this paper, a two-loop calculation showing that the S matrix of the theory of gravity contains non-renormalizable ultraviolet divergences in four dimensions is presented, both in background field and in normal field theory.

TL;DR: In this article, it is shown that a 1 + 1 dimensional quantum field theory which gives a realization of current algebra (for any non-abelian Lie group G) will always give rise to an integrable representation.

TL;DR: In this article, the dependence of factorial moments of the rapidity distribution on the size δy of the resolution was studied. And it was shown that if the fluctuations are purely statistical no variation of moments δ y is expected, and thus observation of such a variation indicates the presence of genuine fluctuations of physical origin.

TL;DR: In this paper, the critical behavior of string tension and most other important qualitative properties of strings are driven by a term in the action containing extrinsic curvatures, which is necessary to add to the Nambu-Goto term.

TL;DR: In this article, it was shown that the superpotential of SU(3) holonomy is invariant to all finite orders in the sigma model perturbation theory.

TL;DR: In this paper, the static, spherically symmetric solutions to the lowest order Gauss-Bonnet extended Einstein equations were considered in an arbitrary number of dimensions, and isotropic, homogeneous cosmological solutions with an ideal fluid source.

TL;DR: In this article, it was shown that fermionic left-right level matching is necessary and sufficient to guarantee modular invariance to 1-loop order in orbifold compactification of heterotic string.

TL;DR: In this paper, a gauge invariant nonlinear classical field theory of open superstrings is explored and the standard structure in the Ramond sector is described, answering questions that have been raised in recent literature.

TL;DR: In this article, the authors complete a series of works on β functions and the anomaly problem in supersymmetric theories and obtain exact expressions for the β functions within the framework of standard perturbation theory.

TL;DR: The pion form factor has been measured in the space-like q 2 region 0.014 to 0.26 (GeV/c ) 2 by scattering 300 GeV pions from the electrons of a liquid hydrogen target.

TL;DR: In this article, the spectrum of the transfer matrix for finite width strips and a variety of boundary conditions were derived for the Ising model and for the three-state Potts model, demonstrating how the internal symmetries of these theories are tied in with their conformal properties.

TL;DR: In this paper, a new mechanism of spontaneous chiral symmetry breaking in the instanton vacuum of QCD is proposed, based on the delocalization of zero fermionic modes in the pseudoparticles' medium.

TL;DR: In this paper, a new supersymmetric mechanism for flavor violation is introduced, which can greatly affect the chiral symmetry structure of the theory, especially if the top quark is not very heavy.

TL;DR: In this article, the possibility of conserving various lepton numbers and the form of the resulting neutrino mass matrix was studied assuming that the neutrinos have Majorana masses.

TL;DR: In this paper, the possibilities for modular invariant ten-dimensional string theories without spacetime supersymmetry were analyzed, which are twisted versions of the closed superstring or of the heterotic string.

TL;DR: In this article, a path integral approach was used to find a closed expression for the abelian, constant field strenght limit of the tree effective action for the massless vector field in the open superstring theory.

TL;DR: In this article, an effective low-energy lagrangian of composite scalar, pseudoscalar, vector and axial-vector mesons was derived by bosonization of an extended Nambu-Jona-Lasinio type of quark model with explicit breaking of chiral U (n) × U(n) symmetry.

TL;DR: In this paper, the Atiyah-Hitchin metric is used to describe the dynamics of two non-relativistic BPS monopoles using the space of collective coordinates of the monopoles.

TL;DR: In this paper, the effect of modular transformations on the spin structure of the string world-sheet is discussed, and it is shown that the GSO projection is compatible with unitarity, that is, wrong G-parity states are not produced in pairs.

TL;DR: In this paper, a twistor-like transform of ten-dimensional supersymmetric Yang-Mills theory is described, which is the proper starting point for understanding the geometrical meaning of superstring theory.