Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Form factors and non-local Multiplicative Anomaly for fermions with
  background torsion   We analyse the Multiplicative Anomaly (MA) in the case of quantized massive
fermions coupled to a background torsion. The one-loop Effective Action (EA)
can be expressed in terms of the logarithm of determinant of the appropriate
first-order differential operator acting in the spinors space. Simple algebraic
manipulations on determinants must be used in order to apply properly the
Schwinger-DeWitt technique, or even the covariant perturbation theory
(Barvinsky and Vilkovisky, 1990), which is used in the present work. By this
method, we calculate the finite non-local quantum corrections, and analyse
explicitly the breakdown of those algebraic manipulations on determinants,
called by MA. This feature comes from the finite non-local EA, but does not
affect the results in the UV limit, in particular the beta-functions. Similar
results was also obtained in previous papers but for different external fields
(QED and scalar field).

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The categories of this paper are: acc-phys
3
The categories of this paper are: physics
2
The categories of this paper are: math
36
The categories of this paper are: cmp-lg
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The categories of this paper are: bayes-an
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The categories of this paper are: eess
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The categories of this paper are: nucl-ex
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The categories of this paper are: q-fin
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The categories of this paper are: patt-sol
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The categories of this paper are: chem-ph
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The categories of this paper are: econ
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The categories of this paper are: quant-ph
4
The categories of this paper are: cond-mat
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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: dg-ga