Showing papers in "Nuclear Physics in 1999"

TL;DR: In this paper, the corresponding Maxwellian-averaged thermonuclear reaction rates of relevance in astrophysical plasmas at temperatures in the range from 10(6) K to 10(10) K were calculated.

TL;DR: In this paper, the authors study the vacua of field theories where some of the gauge symmetry is broken by expectation values of scalar fields, and show how to calculate them from the behavior of perturbations to the AdS background near the boundary.

TL;DR: In this article, it was shown that supersymmetry breaking necessarily generates at one loop a scalar and gaugino mass as a consequence of the super-Weyl anomaly.

TL;DR: In this paper, a symmetry breaking scheme for QCD with three massless quarks at high baryon density was proposed, where the color and flavor SU(3) color × SU (3) L × SU( 3) R symmetries were broken down to the diagonal subgroup SU(4) color+L + R by the formation of a condensate of quark Cooper pairs.

TL;DR: In this article, the 3-point amplitudes for scalar fields of arbitrary mass and gauge fields in the AdS supergravity were calculated explicitly for three gauge fields and compared with the known conformal structure of the SU (4) flavor current correlator of the N = 4, d = 4 SU (N ) SYM theory.

TL;DR: The Kaluza-Klein ansatze as mentioned in this paper describes the embeddings of the U (1) 3, U(1) 4 and U ( 1) 2 truncations of D = 5, D = 4 and D = 7 supergravities into the type IIB string and M-theory.

TL;DR: In this article, it was shown that a 1TeV e + e − collider and the CERN LHC can reliably and perturbatively probe the fundamental gravity scale up to several TeV, with the precise value depending on the number of extra dimensions.

TL;DR: In this article, the authors considered the quantization of open strings with a background B field and showed that space-time coordinates of the open string end points become non-commutative.

TL;DR: In this paper, the form factors for local spin operators of the XXZ Heisenberg spin-z finite chain are computed in terms of expectation values (in ferromagnetic reference state) of the operator entries of the quantum monodromy matrix satisfying Yang-Baxter algebra.

TL;DR: In this paper, the authors show that the unification scale can be significantly lowered (perhaps even to the TeV scale) through the appearance of extra space-time dimensions, which are a natural consequence of string theories with large-radius compactifications.

TL;DR: In this paper, the density dependence for σ-, ω- and ρ-meson coupling is obtained by fitting to properties of nuclear matter and some finite nuclei.

TL;DR: In this paper, the authors derived the five-dimensional effective action of strongly coupled heterotic string theory for the complete (1, 1) sector of the theory by performing a reduction, on a Calabi-Yau threefold, of M-theory on S 1 / Z 2.

TL;DR: In this article, the authors exploited the KLT relations between gravity and gauge theories to derive infinite sequences of one-loop n -graviton scattering amplitudes. But they only considered the case where all-plus amplitudes correspond to self-dual field configurations and vanish in supersymmetric theories.

TL;DR: In this article, the phase diagram of strongly interacting matter as a function of temperature and baryon number density is explored, using a class of models for two-flavor QCD in which the interaction between quarks is modelled by that induced by instantons.

TL;DR: In this article, the graviton exchange diagram for the correlation function of arbitrary scalar operators is evaluated in anti-de Sitter space, AdS d + 1, which enables the computation of the four-point amplitudes of dilaton and axion fields in IIB supergravity on AdS 5 × S 5.

TL;DR: In this article, a new operator for pion photo-and electroproduction has been developed for nuclear applications at photon equivalent energies up to 1 GeV. The model contains Born terms, vector mesons and nucleon resonances, taking into account unitarity to provide the correct phases of the pion photoproduction multipoles.

TL;DR: In this article, the relation between six-dimensional supergravity compactified on S 3 × AdS3 and certain two-dimensional conformal field theories is studied. And the Kaluza-Klein spectrum of supergravity using representation theory is computed.

TL;DR: In this paper, the renormalization factor relating the bare to the group invariant quark masses is accurately calculated in quenched lattice QCD using a recursive finite-size technique.

TL;DR: In this paper, it was shown that D is local (with exponentially decaying tails) if the gauge field is sufficiently smooth at the scale of the cutoff, and further analytic and numerical studies moreover suggest that the locality of D is in fact guaranteed under far more general conditions.

TL;DR: In this paper, the authors study the Higgs-boson mass spectrum of the minimal supersymmetric standard model, in which the tree-level CP invariance of Higgs potential is broken explicitly by loop effects of soft-CP-violating Yukawa interactions related to scalar quarks of the third generation.

TL;DR: In this paper, the conformal invariance of submanifold observables associated with k-branes in the AdS/CFT correspondence was analyzed for odd k and even k.

TL;DR: In this paper, the authors developed effective field theories (EFTs) for the scattering of two particles at wavelengths which are large compared to the range of their interaction, and showed that the renormalized EFT is equivalent to the effective range expansion, to a Schrodinger equation with a pseudo-potential, and to an energy expansion of a generic boundary condition at the origin.

TL;DR: In this article, the authors consider static black holes of D = 5, N = 2 and N = 8 with general spatial curvature k and show that the modifications due to the gauging as well as k enter only the non-extremality function.

TL;DR: In this paper, the divergences of the gravitational action were analyzed for space-times that are asymptotically anti-de Sitter and aflat, and the relation of this method to the traditional reference space-time is discussed.

TL;DR: In this paper, the authors consider the low-energy phenomenology with a mass spectrum dominated by the anomaly induced contributions and calculate electroweak symmetry breaking parameters, scalar masses, and the full one-loop splitting of the degenerate Wino states.

TL;DR: In this article, the authors investigate the motion of a (D−2)-brane (or domain wall) that couples to bulk matter and show that in certain cases it can be static, with consistency of the Israel equations yielding relationships between the bulk metric and matter that can be used as ansatze to solve the Einstein equations.

TL;DR: In this paper, the authors studied the cancellation of U(1) anomalies in Type I and Type IIB D = 4, N = 1 string vacua, and showed that for each given vacuum one has generically more than one U( 1) with non-vanishing triangle anomalies.

TL;DR: In this article, the complete matrix elements for all final states were reduced to a few compact generic functions in the Electroweak Standard Model for polarized massless fermions. But their results are limited to the case where the fermion mass obeys all Ward identities.

TL;DR: In this article, the authors studied a non-trivial HS model which describes HS gauge interactions (on the top of the usual supergravitational and (Chern-Simons) Yang-Mills interactions) of massive spin-0 and spin-12 matter fields in 2 + 1 AdS space-time.

TL;DR: In this paper, boundary conformal field theory is used to study the changes of boundary conditions generated by marginal boundary fields, where the deformation parameters may be regarded as continuous moduli of D-branes.