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New limits on heavy neutrinos from Kaon experiments at CERN
High Energy Physics - Experiment · Submitted 12 Jun 2017
abstract compiled · 2026-09-23 · no language-model review
The authors' main claim In the absence of observed signal, the limits obtained on $\mathcal{B}(K^{\pm}\to\pi^{\mp}\mu^{\pm}\mu^{\pm})$, $\mathcal{B}(K^{\pm}\to \mu^{\pm} N_4)\mathcal{B}(N_4\to \pi\mu)$, $\mathcal{B}(K^{+}\to\mu^{+}N_4)$ and on the mixing matrix element $|U_{\mu4}|^2$ are reported.
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The abstract, sentence by sentence
The NA48/2 and NA62-$R_K$ experiments at CERN collected large samples of charged kaon decays in 2003--2004 and 2007, respectively. These samples, collected with different trigger conditions, allow to search for both short and long-living heavy neutrinos produced in $K^{\pm}\to\mu^{\pm}N_4$ decays. The results of these complementary searches are presented in this letter. In the absence of observed signal, the limits obtained on $\mathcal{B}(K^{\pm}\to\pi^{\mp}\mu^{\pm}\mu^{\pm})$, $\mathcal{B}(K^{\pm}\to \mu^{\pm} N_4)\mathcal{B}(N_4\to \pi\mu)$, $\mathcal{B}(K^{+}\to\mu^{+}N_4)$ and on the mixing matrix element $|U_{\mu4}|^2$ are reported.
background contribution method result interpretation main claim
| # | sentence | role | the authors' own work | states the main conclusion | strength |
|---|---|---|---|---|---|
| s0 | The NA48/2 and NA62-$R_K$ experiments at CERN collected large samples of charged kaon decays in 2003--2004 and 2007, respectively. | method 0.93 | 0.64 | 0.02 | asserted 1.00 |
| s1 | These samples, collected with different trigger conditions, allow to search for both short and long-living heavy neutrinos produced in $K^{\pm}\to\mu^{\pm}N_4$ decays. | method 0.88 | 0.59 | 0.04 | asserted 0.83 |
| s2 | The results of these complementary searches are presented in this letter. | contribution 1.00 | 0.55 | 0.06 | asserted 0.87 |
| s3 | In the absence of observed signal, the limits obtained on $\mathcal{B}(K^{\pm}\to\pi^{\mp}\mu^{\pm}\mu^{\pm})$, $\mathcal{B}(K^{\pm}\to \mu^{\pm} N_4)\mathcal{B}(N_4\to \pi\mu)$, $\mathcal{B}(K^{+}\to\mu^{+}N_4)$ and on the mixing matrix element $|U_{\mu4}|^2$ are reported. | result 0.98 | 0.95 | 0.83 | asserted 0.99 |
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Original abstract
The NA48/2 and NA62-$R_K$ experiments at CERN collected large samples of charged kaon decays in 2003--2004 and 2007, respectively. These samples, collected with different trigger conditions, allow to search for both short and long-living heavy neutrinos produced in $K^{\pm}\to\mu^{\pm}N_4$ decays. The results of these complementary searches are presented in this letter. In the absence of observed signal, the limits obtained on $\mathcal{B}(K^{\pm}\to\pi^{\mp}\mu^{\pm}\mu^{\pm})$, $\mathcal{B}(K^{\pm}\to \mu^{\pm} N_4)\mathcal{B}(N_4\to \pi\mu)$, $\mathcal{B}(K^{+}\to\mu^{+}N_4)$ and on the mixing matrix element $|U_{\mu4}|^2$ are reported.
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