Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Constraints of cluster separability and covariance on current operators   Realistic models of hadronic systems should be defined by a dynamical unitary
representation of the Poincare group that is also consistent with cluster
properties and a spectral condition. All three of these requirements constrain
the structure of the interactions. These conditions can be satisfied in
light-front quantum mechanics, maintaining the advantage of having a kinematic
subgroup of boosts and translations tangent to a light front. The most
straightforward construction of dynamical unitary representations of the
Poincare group due to Bakamjian and Thomas fails to satisfy the cluster
condition for more than two particles. Cluster properties can be restored, at
significant computational expense, using a recursive method due to Sokolov. In
this work we report on an investigation of the size of the corrections needed
to restore cluster properties in Bakamjian-Thomas models with a light-front
kinematic symmetry. Our results suggest that for models based on nucleon and
meson degrees of freedom these corrections are too small to be experimentally
observed.

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The categories of this paper are: q-alg
34
The categories of this paper are: chem-ph
8
The categories of this paper are: hep-ex
33
The categories of this paper are: plasm-ph
19
The categories of this paper are: eess
29
The categories of this paper are: funct-an
10
The categories of this paper are: q-bio
13
The categories of this paper are: quant-ph
21
The categories of this paper are: adap-org
24
The categories of this paper are: dg-ga
22
The categories of this paper are: chao-dyn
18
The categories of this paper are: econ
23
The categories of this paper are: solv-int
27
The categories of this paper are: comp-gas
4
The categories of this paper are: cond-mat
17
The categories of this paper are: q-fin