We are currently experiencing degraded performance with our storage system. We greatly appreciate your patience and we apologize for the general slowness and any inconvenience. Click here to join our chat for updates.

CERN Accelerating science

NA62 Papers

Ostatnio dodane:
2019-03-25
15:48
Searches for lepton number violating $K^+$ decays / NA62 Collaboration
The NA62 experiment at CERN reports a search for the lepton number violating decays  $K^+ \to \pi^- e^+ e^+$ and $K^+ \to \pi^- \mu^+ \mu^+$ using a data sample collected in 2017. No signals are observed, and upper limits on the branching fractions of these decays of $2.2\times 10^{-10}$ and $4.2\times 10^{-11}$ are obtained, respectively, at 90\% confidence level. [...]
arXiv:1905.07770; CERN-EP-2019-104.- 2019-10-10 - 14 p. - Published in : Phys. Lett. B 797 (2019) 134794 Article from SCOAP3: PDF; Draft (restricted): PDF; Fulltext: 1905.07770 - PDF; CERN-EP-2019-104 - PDF;

Rekord szczegółowy - Podobne rekordy
2019-02-02
15:59
Search for production of an invisible dark photon in $\pi^0$ decays / NA62 Collaboration
The results of a search for $\pi^0$ decays to a photon and an invisible massive dark photon at the NA62 experiment at the CERN SPS are reported. From a total of $4.12\times10^8$ tagged $\pi^0$ mesons, no signal is observed. [...]
arXiv:1903.08767; CERN-EP-2019-048.- Geneva : CERN, 2019-05-28 - 17. - Published in : JHEP 05 (2019) 182 Article from SCOAP3: PDF; Draft (restricted): PDF; Fulltext: CERN-EP-2019-048 - PDF; 1903.08767 - PDF;

Rekord szczegółowy - Podobne rekordy
2018-09-14
17:44
First search for $K^+ \to \pi^+ \nu \bar\nu$ using the decay-in-flight technique / NA62 Collaboration
The NA62 experiment at the CERN SPS reports the first search for $K^+ \to \pi^+ \nu \bar{\nu}$ using the decay-in-flight technique, based on a sample of $1.21\times10^{11}$ $K^+$ decays collected in 2016. The single event sensitivity is $3.15 \times 10^{-10}$, corresponding to 0.267 Standard Model events. [...]
arXiv:1811.08508; CERN-EP-2018-314.- Geneva : CERN, 2019-04-10 - 11 p. - Published in : Phys. Lett. B 791 (2019) 156-166 Article from SCOAP3: PDF; Draft (restricted): PDF; Fulltext: 1811.08508 - PDF; CERN-EP-2018-314 - PDF;

Rekord szczegółowy - Podobne rekordy
2017-09-19
12:39
Search for heavy neutral lepton production in $K^+$ decays / NA62 Collaboration
A search for heavy neutral lepton production in $K^+$ decays using a data sample collected with a minimum bias trigger by the NA62 experiment at CERN in 2015 is reported. Upper limits at the $10^{-7}$ to $10^{-6}$ level are established on the elements of the extended neutrino mixing matrix $|U_{\ell 4}|^2$ ($\ell=e,\mu$) for heavy neutral lepton mass in the range $170-448~{\rm MeV}/c^2$. [...]
CERN-EP-2017-311; arXiv:1712.00297.- Geneva : CERN, 2018-03-10 - 9 p. - Published in : Phys. Lett. B 778 (2018) 137-145 Article from SCOAP3: PDF; Draft (restricted): PDF; Fulltext: PDF; Preprint: PDF;

Rekord szczegółowy - Podobne rekordy
2017-04-11
12:59
Search for heavy neutrinos in $K^+ \rightarrow \mu^+ \nu_{\mu}$ decays / Lazzeroni, Cristina (Birmingham U.) ; Lurkin, Nicolas (Birmingham U.) ; Newson, Francis (Birmingham U.) ; Romano, Angela (Birmingham U.) ; Ceccucci, Augusto (CERN) ; Danielsson, Hans (CERN) ; Falaleev, Valeri (CERN) ; Gatignon, Lau (CERN) ; Goy Lopez, Silvia (CERN) ; Hallgren, Bjorn (CERN) et al.
The NA62 experiment recorded a large sample of $K^+ \rightarrow \mu^+ \nu_{\mu}$ decays in 2007. A peak search has been performed in the reconstructed missing mass spectrum. [...]
CERN-EP-2017-114; arXiv:1705.07510.- Geneva : CERN, 2017-09-10 - 7 p. - Published in : Phys. Lett. B 772 (2017) 712-718 Article from SCOAP3: PDF; Draft (restricted): PDF; Fulltext: PDF; Preprint: PDF;

Rekord szczegółowy - Podobne rekordy
2016-10-28
14:19
Measurement of the $\pi^0$ electromagnetic transition form factor slope / NA62 Collaboration
The NA62 experiment collected a large sample of charged kaon decays in 2007 with a highly efficient trigger for decays into electrons. A measurement of the $\pi^{0}$ electromagnetic transition form factor slope parameter from $1.11\times10^{6}$ fully reconstructed $K^\pm \to \pi^\pm \pi^0_D, \; \pi^0_D \to e^+ e^- \, \gamma$ events is reported. [...]
CERN-EP-2016-323; arXiv:1612.08162.- Geneva : CERN, 2017-05-10 - 8 p. - Published in : Phys. Lett. B 768 (2017) 38-45 Article from SCOAP3: PDF; Draft (restricted): PDF; Fulltext: PDF; Preprint: PDF;

Rekord szczegółowy - Podobne rekordy
2013-09-02
16:47
Study of the $K^{\pm} \rightarrow \pi^{\pm} \gamma \gamma$ decay by the NA62 experiment / NA62 Collaboration
A study of the dynamics of the rare decay $K^\pm\to\pi^\pm\gamma\gamma$ has been performed on a sample of 232 decay candidates, with an estimated background of $17.4\pm1.1$ events, collected by the NA62 experiment at CERN in 2007. The results are combined with those from a measurement conducted by the NA48/2 collaboration at CERN. [...]
CERN-PH-EP-2014-025; arXiv:1402.4334; CERN-PH-EP-2014-025.- Geneva : CERN, 2014-05-01 - 10 p. - Published in : Phys. Lett. B 732 (2014) 65-74 Article from SCOAP3: PDF; Draft (restricted): PDF; Elsevier Open Access article: PDF; Fulltext: authors list - TEX; CERN-PH-EP-2014-025 - PDF; Preprint: PDF;

Rekord szczegółowy - Podobne rekordy
2012-09-21
21:27
Measurement of the branching ratio of the decay $\Xi^{0} \rightarrow \Sigma^{+} \mu^{-} \overline{\nu}_{\mu}$ / NA48/1 Collaboration
From the 2002 data taking with a neutral kaon beam extracted from the CERN-SPS, the NA48/1 experiment observed 97 $\Xi^{0}\rightarrow \Sigma^{+} \mu^{-} \bar{\nu}_{\mu}$ candidates with a background contamination of $30.8 \pm 4.2$ events. From this sample, the BR($\Xi^{0}\rightarrow \Sigma^{+} \mu^{-} \bar{\nu}_{\mu}$) is measured to be $(2.17 \pm 0.32_{\mathrm{stat}}\pm 0.17_{\mathrm{syst}})\times10^{-6}$..
CERN-PH-EP-2012-288; arXiv:1212.3131; CERN-PH-EP-2012-288.- Geneva : CERN, 2013 - 12 p. - Published in : Phys. Lett. B 720 (2013) 105-110 Draft (restricted): PDF; Fulltext: muon_paper_accepted - PDF; arXiv:1212.3131 - PDF; Preprint: PDF; External link: Preprint

Rekord szczegółowy - Podobne rekordy
2012-03-26
12:37
Precision Measurement of the Ratio of the Charged Kaon Leptonic Decay Rates / Lazzeroni, C. (Birmingham U.) ; Romano, A. (Birmingham U.) ; Ceccucci, A. (CERN) ; Danielsson, H. (CERN) ; Falaleev, V. (CERN) ; Gatignon, L. (CERN) ; Goy Lopez, S. (CERN ; Madrid, CIEMAT) ; Hallgren, B. (CERN ; Birmingham U.) ; Maier, A. (CERN) ; Peters, A. (CERN) et al.
A precision measurement of the ratio $R_K$ of the rates of kaon leptonic decays $K^\pm \to e^\pm\nu$ and $K^\pm \to \mu^\pm \nu$ with the full data sample collected by the NA62 experiment at CERN in $2007-2008$ is reported. The result, obtained by analysing $\sim\!150000$ reconstructed $K^\pm \to e^\pm \nu$ candidates with $11\%$ background contamination, is $R_K = (2.488\pm0.010)\times10^{-5}$, in agreement with the Standard Model expectation..
arXiv:1212.4012; CERN-PH-EP-2012-367; CERN-PH-EP-2012-367.- Geneva : CERN, 2013-02-26 - 18 p. - Published in : Phys. Lett. B 719 (2013) 326-336 Draft (restricted): PDF; Fulltext: authors list - TEX; CERN-PH-EP-2012-367 - PDF; Preprint: PDF;

Rekord szczegółowy - Podobne rekordy
2011-01-08
19:08
Test of Lepton Flavour Universality in $K^{+} \to l^{+}\nu$ Decays / NA62 Collaboration
A precision test of lepton flavour universality has been performed by measuring the ratio RK of kaon leptonic decay rates K+ --> e+nu and K+ --> mu+nu in a sample of 59813 reconstructed K+ --> e+nu candidates with (8.71 +- 0.24)% background contamination. The result RK = (2.487 +- 0.013) * 10^{-5} is in agreement with the Standard Model expectation..
arXiv:1101.4805; CERN-PH-EP-2011-004; CERN-PH-EP-2011-004.- 2011-04-04 - 10 p. - Published in : Phys. Lett. B 698 (2011) 105-114 Draft (restricted): PDF; Fulltext: PDF; Preprint: PDF;

Rekord szczegółowy - Podobne rekordy