Showing 1998 · hep-thShow all

17 papers · 2 filters

hep-th1998★ 16 cited

Field Theoretic Branes and Tachyons of the QCD String

Nima Arkani-Hamed, Martin Schmaltz

Dvali and Shifman have proposed a field-theoretic mechanism for localizing gauge fields to "branes" in higher dimensional spaces using confinement in a bulk gauge theory. The resul…

hep-th1998★ 12 cited

Light-front Quantized Chiral Schwinger Model and its Vacuum Structure

Prem P. Srivastava

The bosonized Chiral Schwinger model (CSM) is quantized on the light-front (LF). The physical Hilbert space of CSM is obtained directly once the constraints on the LF phase space a…

hep-th1998★ 403 cited

Multi-Leg One-Loop Gravity Amplitudes from Gauge Theory

Z. Bern, L. Dixon, M. Perelstein +1

By exploiting relations between gravity and gauge theories, we present two infinite sequences of one-loop n-graviton scattering amplitudes: the `maximally helicity-violating' ampli…

hep-th1998★ 53 cited

On Vanishing Two Loop Cosmological Constants in Nonsupersymmetric Strings

Shamit Kachru, Eva Silverstein

It has recently been suggested that in certain special nonsupersymmetric type II string compactifications, at least the first two perturbative contributions to the cosmological con…

hep-th1998★ 173 cited

Stabilization of Sub-Millimeter Dimensions: The New Guise of the Hierarchy Problem

Nima Arkani-Hamed, Savas Dimopoulos, John March-Russell

A new framework for solving the hierarchy problem was recently proposed which does not rely on low energy supersymmetry or technicolor. The fundamental Planck mass is at a $\tev$ a…

hep-th1998★ 74 cited

One-Loop n-Point Helicity Amplitudes in (Self-Dual) Gravity

Z. Bern, L. Dixon, M. Perelstein +1

We present an ansatz for all one-loop amplitudes in pure Einstein gravity for which the n external gravitons have the same outgoing helicity. These loop amplitudes, which are ratio…

hep-th1998★ 54 cited

Self-Dual Nonsupersymmetric Type II String Compactifications

Shamit Kachru, Eva Silverstein

It has recently been proposed that certain nonsupersymmetric type II orbifolds have vanishing perturbative contributions to the cosmological constant. We show that techniques of Se…

hep-th1998★ 124 cited

Vacuum Energy Cancellation in a Non-supersymmetric String

Shamit Kachru, Jason Kumar, Eva Silverstein

We present a nonsupersymmetric orbifold of type II string theory and show that it has vanishing cosmological constant at the one and two loop level. We argue heuristically that the…

hep-th1998★ 157 cited

Near Horizon Superspace

R. Kallosh, J. Rahmfeld, A. Rajaraman

The adS_{p+2} x S^{d-p-2} geometry of the near horizon branes is promoted to a supergeometry: the solution of the supergravity constraints for the vielbein, connection and form sup…

hep-th1998★ 95 cited

Vacua of M-theory and string theory

R. Kallosh, A. Rajaraman

We argue that supersymmetric higher-dimension operators in the effective actions of M-theory and IIB string theory do not affect the maximally supersymmetric vacua: $adS_4\times S^…

hep-th1998★ 65 cited

Exact results for non-holomorphic masses in softly broken supersymmetric gauge theories

Nima Arkani-Hamed, Riccardo Rattazzi

We consider strongly coupled supersymmetric gauge theories softly broken by the addition of gaugino masses and (non-holomorphic) scalar masses , taken to be small relati…

hep-th1998★ 726 cited

4d Conformal Field Theories and Strings on Orbifolds

S. Kachru, E. Silverstein

We propose correspondences between 4d quantum field theories with N=2,1,0 (super)conformal invariance and Type IIB string theory on various orbifolds. We argue using the spacetime…

hep-th1998★ 15 cited

Two-Form Fields and the Gauge Theory Description of Black Holes

Arvind Rajaraman

We calculate the absorption cross section on a black threebrane of two-form perturbations polarized along the brane. The equations are coupled and we decouple them for s-wave pertu…

hep-th1998★ 28 cited

Quantum Noether Method

Tobias Hurth, Kostas Skenderis

We present a general method for constructing consistent quantum field theories with global symmetries. We start from a free non-interacting quantum field theory with given global s…

hep-th1998★ 48 cited

Pauli--Villars as a Nonperturbative Ultraviolet Regulator in Discretized Light-Cone Quantization

S. J. Brodsky, J. R. Hiller, G. McCartor

We propose a solution to the problem of renormalizing light-cone Hamiltonian theories while maintaining Lorentz invariance and other symmetries. The method uses generalized Pauli--…

hep-th1998★ 457 cited

On the Relationship between Yang-Mills Theory and Gravity and its Implication for Ultraviolet Divergences

Z. Bern, L. Dixon, D. C. Dunbar +2

String theory implies that field theories containing gravity are in a certain sense `products' of gauge theories. We make this product structure explicit up to two loops for the re…

hep-th1998★ 28 cited

On the Matrix Description of Calabi-Yau Compactifications

S. Kachru, A. Lawrence, E. Silverstein

We point out that the matrix description of M-theory compactified on Calabi-Yau threefolds is in many respects simpler than the matrix description of a compactification. This…