Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Corrections of order O(E^2_e/m^2_N), caused by weak magnetism and proton
  recoil, to the neutron lifetime and correlation coefficients of the neutron
  beta decay   We calculate the contributions of weak magnetism and proton recoil of order
O(E^2_e/m^2_N)~10^{-5}, i.e. to next-to-next-to-leading order in the large
nucleon mass expansion, to the neutron lifetime and correlation coefficients of
the neutron beta decay, where E_e and m_N are the electron energy and the
nucleon mass, respectively. We analyze the electron-energy and angular
distribution for the neutron beta decay with a polarized neutron, a polarized
electron and an unpolarized proton. Together with Wilkinson's corrections
(Nucl. Phys. A 377, 474 (1982) and radiative corrections of order O(alpha
E_e/m_N) ~ 10^{-5} (Phys. Rev. D 99, 093006 (2019)), calculated as
next--to--leading order corrections in the large nucleon mass $m_N$ expansion
to Sirlin's corrections of order O(alpha/pi) (Phys. Rev. 164, 1767 (1967)), the
corrections of order O(E^2_e/m^2_N) ~ 10^{-5} provide an improved level of
precision of the theoretical background of the neutron beta decay, calculated
in the Standard Model, for experimental searches of contributions of
interactions beyond the Standard Model.

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The categories of this paper are: acc-phys
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The categories of this paper are: quant-ph
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The categories of this paper are: q-alg
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The categories of this paper are: ao-sci
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The categories of this paper are: funct-an
5
The categories of this paper are: gr-qc
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The categories of this paper are: chao-dyn
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The categories of this paper are: stat
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The categories of this paper are: econ
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The categories of this paper are: nlin
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The categories of this paper are: cond-mat
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The categories of this paper are: cmp-lg
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The categories of this paper are: supr-con
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The categories of this paper are: q-fin
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The categories of this paper are: bayes-an
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The categories of this paper are: math