Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On the Impact of Soft Photons on $B\rightarrow K \ell^+ \ell^-$   We give detailed results of $\mathcal{O}(\alpha)$ QED corrections (both real
emission and virtual corrections) to $B\to K\ell^+\ell^-$ modes. Requiring the
real emission to be gauge invariant, the structure of the contact term(s) is
fixed. The calculation is done with a fictitious photon mass as the IR
regulator and results are shown to be independent of it, establishing
cancellation of the soft divergences. Results are presented for a choice of
photon energy, $k_{max}$, and photon angle $\theta_{cut}$. The QED effects are
negative, thereby reducing the rate compared to that without QED effects.
Electron channels are shown to receive large corrections ($\mathcal{O}(20\%)$).
Impact on lepton flavour universality ratio, $R^{\mu e}_K$ are also discussed.

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The categories of this paper are: hep-th
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The categories of this paper are: astro-ph
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The categories of this paper are: cond-mat
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The categories of this paper are: dg-ga
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The categories of this paper are: econ
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The categories of this paper are: funct-an
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The categories of this paper are: supr-con
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The categories of this paper are: solv-int
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The categories of this paper are: quant-ph
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The categories of this paper are: q-bio
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The categories of this paper are: q-fin
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The categories of this paper are: nlin
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The categories of this paper are: hep-lat
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The categories of this paper are: math-ph
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The categories of this paper are: bayes-an
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The categories of this paper are: math