Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Limits on Tensor Coupling from Neutron $\beta$-Decay   Limits on the tensor couplings generating a Fierz interference term, b, in
mixed Gamow-Teller Fermi decays can be derived by combining data from
measurements of angular correlation parameters in neutron decay, the neutron
lifetime, and $G_{\text{V}}=G_{\text{F}} V_{ud}$ as extracted from measurements
of the $\mathcal{F}t$ values from the $0^{+} \to 0^{+}$ superallowed decays
dataset. These limits are derived by comparing the neutron $\beta$-decay rate
as predicted in the standard model with the measured decay rate while allowing
for the existence of beyond the standard model couplings. We analyze limits
derived from the electron-neutrino asymmetry, $a$, or the beta-asymmetry, $A$,
finding that the most stringent limits for $C_\text{T}/C_\text{A}$ under the
assumption of no right-handed currents is $-0.0026 < C_\text{T}/C_\text{A} <
0.0024$ (95% C.L.) for the two most recent values of $A$.

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The categories of this paper are: physics
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The categories of this paper are: math
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The categories of this paper are: astro-ph
17
The categories of this paper are: q-fin
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The categories of this paper are: alg-geom
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The categories of this paper are: chem-ph
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The categories of this paper are: cond-mat
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The categories of this paper are: econ
9
The categories of this paper are: nlin
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The categories of this paper are: comp-gas
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The categories of this paper are: stat
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The categories of this paper are: math-ph
21
The categories of this paper are: adap-org
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The categories of this paper are: quant-ph
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The categories of this paper are: atom-ph
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The categories of this paper are: q-bio