Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Has spacetime torsion already been detected in Lorentz and CPT tests
  with spin-polarised bodies?   Bluhm-Kostelecky (BK) Lagrangian to test Lorentz violation with
spin-polarised test bodies is shown to be transformed to a torsion-coupling
constant Lagrangian by taking into account the Fock-Ivanenko coefficients in
spinor form. In this way one is able to introduce torsion in their Lagrangian
and make use of the value of their coupling constant to infer that torsion
maybe observed in this type of spin-polarised body experiment.The theory would
be a low-energy limit of a quasi-Riemannian gravity in Riemann-Cartan spacetime
previously proposed by Gasperini.In this theory of gravity Lorentz local gauge
symmetry is violated while global coordinate transformations are
preserved.Torsion coupling obtained in this way could be as high as $10^{-29}
GeV$.

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The categories of this paper are: dg-ga
36
The categories of this paper are: cmp-lg
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The categories of this paper are: patt-sol
5
The categories of this paper are: gr-qc
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The categories of this paper are: q-fin
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The categories of this paper are: solv-int
30
The categories of this paper are: q-alg
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The categories of this paper are: supr-con
10
The categories of this paper are: q-bio
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The categories of this paper are: atom-ph
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The categories of this paper are: nucl-th
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The categories of this paper are: hep-lat
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The categories of this paper are: plasm-ph
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The categories of this paper are: nucl-ex
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The categories of this paper are: math-ph
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The categories of this paper are: funct-an