• Corpus ID: 15224255

Continuous spin and tensionless strings

  title={Continuous spin and tensionless strings},
  author={Jihad Mourad},
  journal={arXiv: High Energy Physics - Theory},
  • J. Mourad
  • Published 1 October 2004
  • Physics
  • arXiv: High Energy Physics - Theory
A classical action is proposed which upon quantisation yields massless particles belonging to the continuous spin representation of the Poincar\'e group. The string generalisation of the action is identical to the tensionless extrinsic curvature action proposed by Savvidy. We show that the BRST quantisation of the string action gives a critical dimension of 28. The constraints result in a number of degrees of freedom which is the same as the bosonic string. 

Continuous spin particles from a tensionless string theory

It has been shown that the massless irreducible representations of the Poincare group with continuous spin can be obtained from a classical point particle action which admits a generalization to a

Infinite spin particles

We show that Wigner's infinite spin particle classically is described by a reparametrization invariant higher order geometrical lagrangian. The model exhibits unconventional features like tachyonic

The continuous spin limit of higher spin field equations

We show that the Wigner equations describing the continuous spin representations can be obtained as a limit of massive higher-spin field equations. The limit involves a suitable scaling of the wave

String-Localized Quantum Fields and Modular Localization

We study free, covariant, quantum (Bose) fields that are associated with irreducible representations of the Poincaré group and localized in semi-infinite strings extending to spacelike infinity.

Covariant quantization of infinite spin particle models, and higher order gauge theories

Further properties of a recently proposed higher order infinite spin particle model are derived. Infinitely many classically equivalent but different Hamiltonian formulations are shown to exist. This



Physical Fock Space of Tensionless Strings

We study the physical Fock space of the tensionless string theory with perimeter action which has pure massless spectrum. The states are classified by the Wigner’s little group for massless

Tensionless strings, vertex operator for fixed helicity states

The tensionless string theory with perimeter action has pure massless spectrum of higher-spin gauge fields. The multiplicity of these massless states grows linearly. It is therefore much less


We study the physical Fock space of the tensionless string theory with perimeter action, exploring its new gauge symmetry algebra. The cancellation of conformal anomaly requires the space–time to be

Hamiltonian of tensionless strings with tensor central charge coordinates

A new class of twistor-like string models in four-dimensional space-time extended by the addition of six tensorial central charge (TCC) coordinates zmn is studied. The hamiltonian of tensionless

Continuous spin representations of the Poincaré and super-Poincaré groups

We construct Wigner’s continuous spin representations of the Poincare algebra for massless particles in higher dimensions. The states are labeled both by the length of a spacelike translation vector

An Introduction to free higher-spin fields

In this article we begin by reviewing the (Fang-)Fronsdal construction and the non-local geometric equations with unconstrained gauge fields and parameters built by Francia and the senior author from