Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Parity violating pion electroproduction off the nucleon   Parity violating (PV) contributions due to interference between $\gamma$ and
$Z^0$ exchange are calculated for pion electroproduction off the nucleon. A
phenomenological model with effective Lagrangians is used to determine the
resulting asymmetry for the energy region between threshold and $\Delta(1232)$
resonance. The $\Delta$ resonance is treated as a Rarita-Schwinger field with
phenomenological $N \Delta$ transition currents. The background contributions
are given by the usual Born terms using the pseudovector $\pi N$ Lagrangian.
Numerical results for the asymmetry are presented.

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The categories of this paper are: physics
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The categories of this paper are: eess
2
The categories of this paper are: math
20
The categories of this paper are: acc-phys
16
The categories of this paper are: stat
7
The categories of this paper are: hep-th
15
The categories of this paper are: nucl-ex
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The categories of this paper are: dg-ga
23
The categories of this paper are: solv-int
37
The categories of this paper are: supr-con
18
The categories of this paper are: econ
29
The categories of this paper are: funct-an
21
The categories of this paper are: adap-org
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The categories of this paper are: plasm-ph
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The categories of this paper are: cs
36
The categories of this paper are: cmp-lg