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CERN Document Server 464 elementer funnet  1 - 10nesteslutt  gå til element: Søket tok 0.80 sekunder. 
1.
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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2.
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;
Detaljert visning - Lignende elementer - 39 comments
3.
First search for $K^+ \to \pi^0 \pi \mu e$ decays / NA62 Collaboration
The first search for the lepton number violating decay $K^+ \to \pi^0 \pi^- \mu^+ e^+$ and lepton flavour violating decays $K^+ \to \pi^0 \pi^+ \mu^- e^+$, $K^+ \to \pi^0 \pi^+ \mu^+ e^-$ has been performed using a dataset collected by the NA62 experiment at CERN in 2016–2018. Upper limits of $2.9\times 10^{-10}$, $3.1 \times 10^{-10}$ and $5.0 \times 10^{-10}$, respectively, are obtained at 90% CL for the branching ratios of the three decays on the assumption of uniform phase-space distributions..
arXiv:2409.12981; CERN-EP-2024-224.- Geneva : CERN, 2024-11-12 - 9 p. - Published in : Phys. Lett. B 859 (2024) 139122 Draft (restricted): PDF; Fulltext: CERN-EP-2024-224 - PDF; 2409.12981 - PDF; Publication - PDF;
Detaljert visning - Lignende elementer - 4 comments
4.
Development of a new CEDAR for kaon identification at the NA62 experiment at CERN / NA62 Collaboration
The NA62 experiment at CERN utilises a differential Cherenkov counter with achromatic ring focus (CEDAR) for tagging kaons within an unseparated monochromatic beam of charged hadrons. The CEDAR-H detector was developed to minimise the amount of material in the path of the beam by using hydrogen gas as the radiator medium. [...]
arXiv:2312.17188; CERN-EP-2023-302.- Geneva : CERN, 2024-05-07 - 20 p. - Published in : JINST 19 (2024) P05005 Draft (restricted): PDF; Fulltext: 2312.17188 - PDF; document - PDF; CERN-EP-2023-302 - PDF;
Detaljert visning - Lignende elementer - 22 comments
5.
Search for leptonic decays of dark photons at NA62Search for Leptonic Decays of Dark Photons at NA62 / NA62 Collaboration
The NA62 experiment at CERN, configured in beam-dump mode, has searched for dark photon decays in flight to electron-positron pairs using a sample of $1.4 \times 10^{17}$ protons on dump collected in 2021. No evidence for a dark photon signal is observed. [...]
arXiv:2312.12055; CERN-EP-2023-296.- Geneva : CERN, 2024-09-11 - 10 p. - Published in : Phys. Rev. Lett. 133 (2024) 111802 Draft (restricted): PDF; Fulltext: CERN-EP-2023-296 - PDF; 2312.12055 - PDF; Publication - PDF;
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6.
Measurement of the $K^+ \to \pi^+ \gamma \gamma$ decay / NA62 Collaboration
A sample of 3984 candidates of the $K^+ \to \pi^+ \gamma \gamma$ decay, with an estimated background of $291 \pm 14$ events, was collected by the NA62 experiment at CERN during 2017–2018. In order to describe the observed di-photon mass spectrum, the next-to-leading order contribution in chiral perturbation theory was found to be necessary. [...]
arXiv:2311.01837; CERN-EP-2023-247.- Geneva : CERN, 2024-02-07 - 11 p. - Published in : Phys. Lett. B 850 (2024) 138513 Draft (restricted): PDF; Fulltext: 2311.01837 - PDF; Publication - PDF; CERN-EP-2023-247 - PDF;
Detaljert visning - Lignende elementer - 20 comments
7.
Search for $K^+$ decays into the $\pi^+e^+e^-e^+e^-$ final state / NA62 Collaboration
The first search for ultra-rare $K^+$ decays into the $\pi^+e^+e^-e^+e^-$ final state is reported, using a dataset collected by the NA62 experiment at CERN in 2017-2018. An upper limit of $1.4\times 10^{-8}$ at 90% CL is obtained for the branching ratio of the $K^+\to\pi^+e^+e^-e^+e^-$ decay, predicted in the Standard Model to be $(7.2 \pm0 .7)\times 10^{-11}$. [...]
arXiv:2307.04579; CERN-EP-2023-133.- Geneva : CERN, 2023-09-22 - 9 p. - Published in : Phys. Lett. B 846 (2023) 138193 Draft (restricted): PDF; Fulltext: CERN-EP-2023-133 - PDF; Publication - PDF; 2307.04579 - PDF;
Detaljert visning - Lignende elementer - 16 comments
8.
Observation of the $B^0_s\rightarrow \chi_{c1}(3872)\pi^+\pi^-$ decay / LHCb Collaboration
The first observation of the $B^0_s \rightarrow \left( \chi_{c1}(3872) \rightarrow J/\psi\pi^+\pi^-\right) \pi^+ \pi^-$ decay is reported using proton-proton collision data, corresponding to integrated luminosities of 1, 2 and 6fb$^{-1}$, collected by the LHCb experiment at centre-of-mass energies of 7, 8 and 13TeV, respectively. The ratio of branching fractions relative to the $B^0_s \rightarrow \left( \psi(2S) \rightarrow J\psi\pi^+\pi^- \right) \pi^+ \pi^-$ decay is measured to be $$ \frac{ \mathcal{B} \left( B^0_s \rightarrow \chi_{c1}(3872) \pi^+\pi^-\right) \times \mathcal{B} \left( \chi_{c1}(3872) \rightarrow J\psi\pi^+\pi^-\right)} { \mathcal{B} \left( B^0_s \rightarrow \psi(2S) \pi^+ \pi^- \right) \times \mathcal{B} \left( \psi(2S) \rightarrow J\psi\pi^+\pi^-\right) } = \left( 6.8 \pm 1.1 \pm 0.2 \right) \times 10^{-2} , $$ where the first uncertainty is statistical and the second systematic. [...]
arXiv:2302.10629; CERN-EP-2023-015; LHCb-PAPER-2022-049; LHcb-PAPER-2022-049.- Geneva : CERN, 2023-07-11 - 18 p. - Published in : JHEP 2307 (2023) 084 Fulltext: LHCb-PAPER-2022-049 - PDF; 2302.10629 - PDF; document - PDF; Related data file(s): ZIP;
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9.
A study of the $K^+ \to \pi^0 e^+ \nu \gamma$ decay / NA62 Collaboration
A sample of $1.3 \times 10^5 K^+ \to \pi^0 e^+ \nu \gamma$ candidates with less than 1% background was collected by the NA62 experiment at the CERN SPS in 2017-2018. Branching fraction measurements are obtained at percent relative precision in three restricted kinematic regions, improving on existing results by a factor larger than two. [...]
arXiv:2304.12271; CERN-EP-2023-069.- Geneva : CERN, 2023-09-07 - 16 p. - Published in : JHEP 2309 (2023) 040 Draft (restricted): PDF; Fulltext: CERN-EP-2023-069 - PDF; 2304.12271 - PDF; document - PDF;
Detaljert visning - Lignende elementer - 35 comments
10.
Search for dark photon decays to $\mu^+ \mu^-$ at NA62 / NA62 Collaboration
The NA62 experiment at CERN, designed to study the ultra-rare decay $K^+ \rightarrow \pi^+ \nu \bar\nu$, has also collected data in beam-dump mode. In this configuration, dark photons may be produced by protons dumped on an absorber and reach a decay volume beginning 80 m downstream. [...]
arXiv:2303.08666; CERN-EP-2023-032.- Geneva : CERN, 2023-09-06 - 23 p. - Published in : JHEP 2309 (2023) 035 Draft (restricted): PDF; Fulltext: CERN-EP-2023-032 - PDF; document - PDF; 2303.08666 - PDF;
Detaljert visning - Lignende elementer - 15 comments

CERN Document Server : 464 elementer funnet   1 - 10nesteslutt  gå til element:
Se også: lignende forfatternavn
240 Yushchenko, O
238 Yushchenko, O P
221 Yushchenko, O.
1 Yushchenko, O.P.
2 Yushchenko, OP
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