Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Scalar and Pseudoscalar Glueball Masses within a Gaussian Wavefunctional
  Approximation   The lowest scalar and pseudoscalar glueball masses are evaluated by means of
the time-dependent variational approach to the Yang-Mills gauge theory without
fermions in the Hamiltonian formalism within a Gaussian wavefunctional
approximation. The glueball mass is calculated as a pole of the propagator for
a composite glueball field which consists of two massless gluons. The glueball
propagator is here evaluated by using the linear response theory for the
composite external glueball field. As a result, a finite glueball mass is
obtained through the interaction between two massless gluons, in which the
glueball mass depends on the QCD coupling constant g in the nonperturbative
form.

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The categories of this paper are: adap-org
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The categories of this paper are: gr-qc
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The categories of this paper are: ao-sci
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The categories of this paper are: q-bio
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The categories of this paper are: cond-mat
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The categories of this paper are: physics
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The categories of this paper are: astro-ph
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The categories of this paper are: math
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The categories of this paper are: quant-ph
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The categories of this paper are: alg-geom
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The categories of this paper are: cs
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The categories of this paper are: hep-ex
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The categories of this paper are: acc-phys
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The categories of this paper are: funct-an
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The categories of this paper are: solv-int
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The categories of this paper are: plasm-ph