J. Engelfried
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View article: First NA62 search for long-lived new physics particle hadronic decays
First NA62 search for long-lived new physics particle hadronic decays Open
The NA62 experiment at CERN, designed to measure the highly-suppressed decay $K^+\to\pi^+\nu\bar\nu$, has the capability to collect data in a beam-dump mode, where $400~$GeV protons are dumped on an absorber. In this configuration, new phy…
View article: Recent results from the NA62 experiment at CERN
Recent results from the NA62 experiment at CERN Open
The NA62 experiment at CERN SPS is designed to study the $K^+\to\pi^+\nu\bar\nu$ decay. After collecting data in 2016, 2017, and 2018, the experiment has resumed data taking in 2021 and has received approval for operations until the onset …
View article: Latest results from precision measurements at the NA62 experiment
Latest results from precision measurements at the NA62 experiment Open
Then NA62 experiment at CERN collected the world's largest dataset of charged Kaons, the main goal being the measurement of the $\mathcal{B}(K^+ \rightarrow \pi^+ \nu \bar{\nu})$. New results from the analyses of rare kaon and pion decays …
View article: Search for Leptonic Decays of Dark Photons at NA62
Search for Leptonic Decays of Dark Photons at NA62 Open
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 1.4×1017 protons on dump collected in 2021. No evidence for a dark photon signal is obser…
View article: Charm and bottom production in FNAL fixed target experiments
Charm and bottom production in FNAL fixed target experiments Open
In this talk we will review current results concerning bottom and charm physics from Fermilab Fixed Target experiments E672/E706, E769, E771, E781 (SELEX), E789, D791, E831 (FOCUS). Both production and decay physics will be reviewed. Resul…
View article: FOCEX: A Fiber optic cable extender for a high speed parallel RS485 data cable
FOCEX: A Fiber optic cable extender for a high speed parallel RS485 data cable Open
For longer-distant, high speed data links, optical fibre becomes most cost-effective than copper or other hard wire cable systems. Fermilab supplied to Finisar Corp. of Menlo Park, CA., a set of specifications for card functions, sizes and…
View article: Development of a new CEDAR for kaon identification at the NA62 experiment at CERN
Development of a new CEDAR for kaon identification at the NA62 experiment at CERN Open
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 amou…
View article: Physics Beyond the Standard Model with the NA62 experiment at CERN
Physics Beyond the Standard Model with the NA62 experiment at CERN Open
The first measurement of the branching ratio of the ultra-rare K+→π+νν ̄ decay and the searches for production of feebly interacting particles predicted by dark scalar models from the NA62 experiment at CERN are presented. The results of a …
View article: Workshop summary -- Kaons@CERN 2023
Workshop summary -- Kaons@CERN 2023 Open
Kaon physics is at a turning point -- while the rare-kaon experiments NA62 and KOTO are in full swing, the end of their lifetime is approaching and the future experimental landscape needs to be defined. With HIKE, KOTO-II and LHCb-Phase-II…
View article: Measurement of the very rare $K^+ \to \pi^+ \nu \bar\nu$ decay
Measurement of the very rare $K^+ \to \pi^+ \nu \bar\nu$ decay Open
The decay K+→π+νν¯
\n, with a very precisely predicted branching ratio of less than 10−10
\n,
\nis among the best processes to reveal indirect effects of new physics.
\nThe NA62 experiment at CERN SPS is designed to study the K+→π+νν¯
\n d…
View article: Measurement of the very rare K+→π+νν decay at the NA62 experiment at CERN
Measurement of the very rare K+→π+νν decay at the NA62 experiment at CERN Open
The NA62 experiment reports the branching ratio measurement $BR(K^+\\to\\pi^+\\nu\\bar\\nu)$ at 68% CL, based on the observation of 20 signal candidates with an expected background of 7.0 events from the total data sample collected at the …
View article: Search for K+ decays to a lepton and invisible particles
Search for K+ decays to a lepton and invisible particles Open
Searches for heavy neutral leptons N
\n in the K+→e+N
\n and K+→μ+N
\n decay channels using the dataset collected by the NA62 experiment at CERN between 2016-2018 are presented. Upper limits on the corresponding mixing matrix elements are …
View article: Two RICH detectors as velocity spectrometers in the CKM experiment
Two RICH detectors as velocity spectrometers in the CKM experiment Open
We present the design of two velocity spectrometers, to be used in the recently approved CKM experiment. CKM's main goal is the measurement of the branching ratio of K{sup +} {yields} {pi}{sup +} {nu}{bar {nu}} with a precision of 10%, via…
View article: Fermilab DART run control
Fermilab DART run control Open
DART is the high speed, Unix based data acquisition system being developed by Fermilab in collaboration with seven High Energy Physics Experiments. This paper describes DART run control, which has been developed over the past year and is a…
View article: Search for lepton number violation and other exotic processes at NA62
Search for lepton number violation and other exotic processes at NA62 Open
NA62 is a fixed target experiment at CERN, with the main goal of measuring the branching ratio of the very rare decay $K$$^{+}$ → $\\pi$$^{+}$$\\nu$$\\bar{\\nu}$ However, the wide physics program covered by the experiment allows the search…
View article: Searches for lepton flavour and lepton number violation in K$^+$ decays
Searches for lepton flavour and lepton number violation in K$^+$ decays Open
The NA62 experiment at the CERN SPS is designed to conduct precision tests of the Standard Model by studying rare decays of charged kaons. NA62 took data in 2016-2018 and collected a large sample of charged kaon decays into final states wi…
View article: Dark sector searches in non-LHC experiments
Dark sector searches in non-LHC experiments Open
We will present recently published and soon to be expected results for dark matter searches in non-LHC experiments, namely BABAR, NA62, NA64, BELLE II, and PADME.
View article: Search for $K^+ \to \pi^+ \nu \bar{\nu}$ at NA62
Search for $K^+ \to \pi^+ \nu \bar{\nu}$ at NA62 Open
The decay $K^{+} \\rightarrow \\pi^{+}\\nu\\overline{\\nu}$ has a very precisely predicted branching ratio ($\\sim 8\\times 10^{-11}$) and it is one of the best candidates to reveal indirect effects of new physics. The NA62 experiment at C…
View article: Search for $K^{+}\rightarrow\pi^{+}\nu\overline{\nu}$ at NA62
Search for $K^{+}\rightarrow\pi^{+}\nu\overline{\nu}$ at NA62 Open
$K^{+}\rightarrow\pi^{+}\nu\overline{\nu}$ is one of the theoretically cleanest meson decay where to look for indirect effects of new physics complementary to LHC searches. The NA62 experiment at CERN SPS is designed to measure the branchi…
View article: Search for $K^{+}\rightarrowπ^{+}ν\overlineν$ at NA62
Search for $K^{+}\rightarrowπ^{+}ν\overlineν$ at NA62 Open
$K^{+}\rightarrowπ^{+}ν\overlineν$ is one of the theoretically cleanest meson decay where to look for indirect effects of new physics complementary to LHC searches. The NA62 experiment at CERN SPS is designed to measure the branching ratio…
View article: Search for Κ + → π+ νν at NA62
Search for Κ + → π+ νν at NA62 Open
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View article: NA62 and NA48/2 results on search for Heavy Neutral Leptons
NA62 and NA48/2 results on search for Heavy Neutral Leptons Open
In this paper we present new results on upper limits for the search of Heavy Neutral Leptons (HNL) with data collected by NA48/2 (2003-2004), NA62-RK (2007) and NA62 (2015) CERN experiments. The data collected with different trigger config…
View article: NA48/62 latest results
NA48/62 latest results Open
The NA62 experiment at the CERN SPS recorded in 2007 a large sample of\n $K^+ \\rightarrow \\mu^+ \\nu_\\mu $ decays. A peak search in the missing\n mass spectrum of this decay is performed. In the absence of observed\n signal, the limits …