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CERN Document Server 2,047 записей найдено  1 - 10следующийконец  перейти к записи: Поиск длился 2.00 секунд. 
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First detection of a tagged neutrino in the NA62 experiment / NA62 Collaboration
The NA62 experiment at the CERN SPS reports the first detection of a tagged neutrino candidate based on the data collected in 2022. [...]
arXiv:2412.04033. - 16.
Fulltext
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Observation of the $K^+ \to \pi^+ \nu \bar\nu$ decay and measurement of its branching ratio / Cortina Gil, Eduardo (Louvain U., CP3) ; Jerhot, Jan (Louvain U., CP3 ; Munich, Max Planck Inst.) ; Lurkin, Nicolas (Louvain U., CP3) ; Bryman, Douglas (British Columbia U. ; TRIUMF) ; Numao, Toshio (TRIUMF) ; Velghe, Bob (TRIUMF) ; Wong, Vincent Wai Sum (TRIUMF) ; Hives, Zdenko (Charles U.) ; Husek, Tomas (Charles U. ; Birmingham U.) ; Kampf, Karol (Charles U.) et al.
A measurement of the $K^+ \to \pi^+ \nu \bar\nu$ decay by the NA62 experiment at the CERN SPS is presented, using data collected in 2021 and 2022. This dataset was recorded, after modifications to the beamline and detectors, at a higher instantaneous beam intensity with respect to the 2016–2018 data taking. [...]
arXiv:2412.12015; CERN-EP-2024-343.- Geneva : CERN, 2024 - 29 p. Draft (restricted): PDF; Fulltext: CERN-EP-2024-343 - PDF; 2412.12015 - PDF;
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A search for the $K^+ \to \mu^- \nu e^+ e^+$ decay / NA62 Collaboration
A search for the $K^+ \to \mu^- \nu e^+ e^+$ decay forbidden within the Standard Model by either lepton number or lepton flavour conservation depending on the flavour of the emitted neutrino, has been performed using the dataset collected by the NA62 experiment at CERN in 2016–2018. An upper limit of $8.1 \times 10^{-11}$ is obtained for the decay branching fraction at 90% CL, improving by a factor of 250 over the previous search..
arXiv:2211.04818; CERN-EP-2022-243.- Geneva : CERN, 2023-03-10 - 12 p. - Published in : Phys. Lett. B 838 (2023) 137679 Draft (restricted): PDF; Fulltext: 2211.04818 - PDF; Publication - PDF; CERN-EP-2022-243 - PDF;
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An investigation of the very rare $K^+\rightarrow\pi^+\nu\bar{\nu}$ decay / NA62 Collaboration
The NA62 experiment reports an investigation of the $K^+\rightarrow\pi^+\nu\bar{\nu}$ mode from a sample of $K^+$ decays collected in 2017 at the CERN SPS. The experiment has achieved a single event sensitivity of $(0.389\pm 0.024)\times10^{-10}$, corresponding to 2.2 events assuming the Standard Model branching ratio of $(8.4\pm1.0)\times10^{-11}$. [...]
arXiv:2007.08218; CERN-EP-2020-132.- Geneva : CERN, 2020-11-10 - 52 p. - Published in : JHEP 2011 (2020) 042 Article from SCOAP3: PDF; Draft (restricted): PDF; Fulltext: 2007.08218 - PDF; CERN-EP-2020-132 - PDF;
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Search for a feebly interacting particle $X$ in the decay $K^+ \to \pi^+ X$ / NA62 Collaboration
A search for the $K^+ \to \pi^+ X$ decay, where $X$ is a long-lived feebly interacting particle, is performed through an interpretation of the $K^+ \to \pi^+ \nu \bar\nu$ analysis of data collected in 2017 by the NA62 experiment at CERN. Two ranges of $X$ masses, $0-110$ MeV/$c^2$ and $154-260$ MeV/$c^2$, and lifetimes above 100 ps are considered. [...]
arXiv:2011.11329; CERN-EP-2020-227.- Geneva : CERN, 2021-03-04 - 14 p. - Published in : JHEP 2103 (2021) 058 Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; Draft (restricted): PDF; Fulltext: 2011.11329 - PDF; CERN-EP-2020-227 - PDF;
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Search for $\pi^0$ decays to invisible particles / NA62 Collaboration
The NA62 experiment at the CERN SPS reports a study of a sample of $4 \times 10^9$ tagged $\pi^0$ mesons from $K^+ \to \pi^+ \pi^0 (\gamma)$, searching for the decay of the $\pi^0$ to invisible particles. No signal is observed in excess of the expected background fluctuations. [...]
arXiv:2010.07644; CERN-EP-2020-193.- Geneva : CERN, 2021 - 27 p. - Published in : JHEP 02 (2021) 201 Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; Draft (restricted): PDF; Fulltext: CERN-EP-2020-193 - PDF; 2010.07644 - PDF;
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Search for heavy neutral lepton production in $K^+$ decays to positrons / NA62 Collaboration
A search for heavy neutral lepton ($N$) production in $K^+\to e^+N$ decays using the data sample collected by the NA62 experiment at CERN in 2017--2018 is reported. Upper limits of the extended neutrino mixing matrix element $|U_{e4}|^2$ are established at the level of $10^{-9}$ over most of the accessible heavy neutral lepton mass range 144--462 MeV/$c^2$, with the assumption that the lifetime exceeds 50 ns. [...]
arXiv:2005.09575; CERN-EP-2020-089.- Geneva : CERN, 2020-07-02 - 9 p. - Published in : Phys. Lett. B 807 (2020) 135599 Article from SCOAP3: PDF; Fulltext: 2005.09575 - PDF; CERN-EP-DRAFT-NA62-2020-001 - PDF;
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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: scoap3-fulltext - PDF; scoap - PDF; Draft (restricted): PDF; Fulltext: CERN-EP-2019-048 - PDF; 1903.08767 - PDF;
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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;
Подробная запись - Подобные записи - 20 комментариев
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Search for $K^+$ decays to a muon and invisible particles / NA62 Collaboration
The NA62 experiment at CERN reports searches for $K^+\to\mu^+N$ and $K^+\to\mu^+\nu X$ decays, where $N$ and $X$ are massive invisible particles, using the 2016-2018 data set. The $N$ particle is assumed to be a heavy neutral lepton, and the results are expressed as upper limits of ${\cal O}(10^{-8})$ of the neutrino mixing parameter $|U_{\mu4}|^2$ for $N$ masses in the range 200-384 MeV/$c^2$ and lifetime exceeding 50 ns. [...]
arXiv:2101.12304; CERN-EP-2021-018.- Geneva : CERN, 2021-05-10 - 10 p. - Published in : Phys. Lett. B 816 (2021) 136259 Article from SCOAP3: PDF; Draft (restricted): PDF; Fulltext: 2101.12304 - PDF; CERN-EP-2021-018 - PDF;
Подробная запись - Подобные записи - 27 комментариев

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