20 research outputs found
Chiral Quantization on a Group Manifold
The phase space of a particle on a group manifold can be split in left and
right sectors, in close analogy with the chiral sectors in Wess Zumino Witten
models. We perform a classical analysis of the sectors, and the geometric
quantization in the case of . The quadratic relation, classically
identifying as the sphere , is replaced quantum mechanically by a
similar condition on non-commutative operators ('quantum sphere'). The
resulting quantum exchange algebra of the chiral group variables is quartic,
not quadratic. The fusion of the sectors leads to a Hilbert space that is
subtly different from the one obtained by a more direct (un--split)
quantization.Comment: 25p, LaTeX, KUL-TF-93/4
High spin particles with spin-mass coupling
The classical and quantum model of high spin particles is proposed and
analyzed in this paper. The covariant quantization leads to the spectrum of the
particles with the masses correlated with their spins. The particles (and
anti-particles) appear to be orphaned as their potential anti-particle partners
are of different mass.Comment: 11 pages, 1 figure, the paper accepted for publication in Advances in
Applied Clifford Algebr
Light-cone formulation and spin spectrum of non-critical fermionic string
A free fermionic string quantum model is constructed directly in the
light-cone variables in the range of dimensions . It is shown that
after the GSO projection this model is equivalent to the fermionic massive
string and to the non-critical Rammond-Neveu-Schwarz string. The spin spectrum
of the model is analysed. For the character generating functions is
obtained and the particle content of first few levels is numerically
calculated.Comment: 13 page
High spin particles with spin-mass coupling II
The classical and quantum model of high spin particles with spin-mass
coupling is presented in this paper. The mass spectrum of the model is
symmetric with respect to particle-antiparticle exchange. The quantum model
contains elementary particles and the cluster states generating infinite
degeneracy of the mass spectrum.Comment: 12 pages, 1 figure, the paper accepted for publication in Advances in
Applied Clifford Algebr
Anomalus BRST Complexes for Non-Critical Massive Strings
It is shown that the BRST resolution of the spaces of physical states of
non-critical (anomalus) massive string models can be consistently defined. The
appropriate anomalus complexes are obtained by canonical restrictions of the
ghost extended spaces to the kernel of curvature operator and additional
Gupta-Bleuler like conditions without any modifications of the matter sector.
The cohomologies of the polarized anomalus complex are calculated and analyzed
in details.Comment: The errors of the previous version are correcte
Non-Critical Light-Cone String
The free non-critical string quantum model is constructed directly in the
light-cone variables in the range of dimensions . The longitudinal
degrees of freedom are described by an abstract Verma module. The central
charge of this module is restricted by the requirement of the closure of the
nonlinear realization of the Poincare algebra. The spin content of the model is
analysed. In particular for D=4 the explicit formulae for the character
generating functions of the open and closed massive strings are given and the
spin spectrum of first 12 excited levels is calculated. It is shown that for
the space-time dimension in the range the non-critical light-cone
string is equivalent to the critical massive string and to the non-critical
Nambu-Goto string.Comment: 20 pages, Late
Light-cone formulation and spin spectra of massive strings
It is shown that all bosonic and fermionic massive string models admit
consistent light-cone formulations. This result is used to derive the spin
generating functions of these models in four dimensions.Comment: 11 page