A. Gianoli
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View article: Kaon physics: a cornerstone for future discoveries
Kaon physics: a cornerstone for future discoveries Open
The kaon physics programme, long heralded as a cutting-edge frontier by the European Strategy for Particle Physics, continues to stand at the intersection of discovery and innovation in high-energy physics (HEP). With its unparalleled capa…
View article: Searches for hidden sectors using $K^+\toπ^+X$ decays
Searches for hidden sectors using $K^+\toπ^+X$ decays Open
Results from the study of the rare decays $K^+\toπ^+ν\barν$, $K^{+}\rightarrowπ^{+}μ^{+}μ^{-}$ and $K^{+}\rightarrowπ^{+}γγ$ at the NA62 experiment at CERN are interpreted in terms of improved limits for $\rm{B}(K^+\toπ^+X)$ and coupling p…
View article: Search for heavy neutral leptons in $π^+$ decays to positrons
Search for heavy neutral leptons in $π^+$ decays to positrons Open
A search for heavy neutral lepton ($N$) production in $π^+\to e^+ N$ in-flight decays using data collected by the NA62 experiment at CERN in 2017-2024 is reported. Upper limits for the extended neutrino mixing matrix element $|U_{e4}|^2$ a…
View article: Search for hadronic decays of feebly-interacting particles at NA62
Search for hadronic decays of feebly-interacting particles at NA62 Open
View article: DataPix4: A C++ framework for Timepix4 configuration and read-out
DataPix4: A C++ framework for Timepix4 configuration and read-out Open
DataPix4 (Data Acquisition for Timepix4 Applications) is a new C++ framework for the management of Timepix4 ASIC, a multi-purpose hybrid pixel detector designed at CERN. Timepix4 consists of a matrix of 448×512 pixels that can be connected…
View article: Experimental Study of Rare Kaon Decays at J-PARC with KOTO and KOTO II
Experimental Study of Rare Kaon Decays at J-PARC with KOTO and KOTO II Open
The rare kaon decay $K_L\toπ^0ν\barν$ is extremely sensitive to new physics, because the contribution to this decay in the Standard Model (SM) is highly suppressed and known very accurately; the branching ratio is $3\times 10^{-11}$ in the…
View article: DataPix4: A C++ framework for Timepix4 configuration and read-out
DataPix4: A C++ framework for Timepix4 configuration and read-out Open
DataPix4 (Data Acquisition for Timepix4 Applications) is a new C++ framework for the management of Timepix4 ASIC, a multi-purpose hybrid pixel detector designed at CERN. Timepix4 consists of a matrix of 448x512 pixels that can be connected…
View article: First detection of a tagged neutrino in the NA62 experiment
First detection of a tagged neutrino in the NA62 experiment Open
The NA62 experiment at the CERN SPS reports the first detection of a tagged neutrino candidate based on the data collected in 2022. The candidate consists of a K+→μ+νμ decay where the charged particles are reconstructed and the neutrino is…
View article: Proposal of the KOTO II experiment
Proposal of the KOTO II experiment Open
International audience
View article: R&D on a high-performance electromagnetic calorimeter based on oriented crystalline scintillators
R&D on a high-performance electromagnetic calorimeter based on oriented crystalline scintillators Open
Although inorganic scintillators are widely used in the design of electromagnetic calorimeters for high-energy physics and astrophysics, their crystalline nature and, hence, their lattice orientation are generally neglected in the detector…
View article: Search for Physics beyond the Standard Model at NA62
Search for Physics beyond the Standard Model at NA62 Open
View article: Observation of the $K^{+}\rightarrowπ^{+}ν\barν$ decay and measurement of its branching ratio
Observation of the $K^{+}\rightarrowπ^{+}ν\barν$ decay and measurement of its branching ratio Open
A measurement of the $K^{+}\rightarrowπ^{+}ν\barν$ 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 …
View article: First search for K+ → π0πμe decays
First search for K+ → π0πμe decays Open
The first search for the lepton number violating decay K+→π0π−μ+e+ and lepton flavour violating decays K+→π0π+μ−e+, K+→π0π+μ+e− has been performed using a dataset collected by the NA62 experiment at CERN in 2016–2018. Upper limits of 2.9×1…
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: First search for $K^+\toπ^0πμe$ decays
First search for $K^+\toπ^0πμe$ decays Open
The first search for the lepton number violating decay $K^+\toπ^0π^-μ^+e^+$ and lepton flavour violating decays $K^+\toπ^0π^+μ^-e^+$, $K^+\toπ^0π^+μ^+e^-$ has been performed using a dataset collected by the NA62 experiment at CERN in 2016-…
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: First observation and study of the K± → π0π0μ±ν decay
First observation and study of the K± → π0π0μ±ν decay Open
View article: Status of searches for rare kaon decays at NA62 \& HIKE
Status of searches for rare kaon decays at NA62 \& HIKE Open
Recent results from searches for rare kaon decays with the NA62 experiment at CERN are reported, together with the future prospects. A future experiment HIKE, to go beyond NA62, has been proposed to push kaon physics to an unprecedented fr…
View article: Operation and performance of the NA62 Gigatracker
Operation and performance of the NA62 Gigatracker Open
The GigaTracKer is a hybrid silicon pixel detector designed for the fixed-target experiment NA62 at the CERN SPS aiming to measure the branching ratio of the very rare kaon decay $K^+ \\rightarrow \\pi^+\\nu \\bar{\\nu}$ with 10\\% precisi…
View article: Measurement of the K+ → π+γγ decay
Measurement of the K+ → π+γγ decay Open
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 $K^+ \\to \\pi^+\\nu\\bar\\nu$ decay and the searches for production of feebly interacting particles predicted by dark scalar models from the NA62 experiment at CERN are presen…
View article: Improved calorimetric particle identification in NA62 using machine learning techniques
Improved calorimetric particle identification in NA62 using machine learning techniques Open
A bstract Measurement of the ultra-rare $$ {K}^{+}\to {\pi}^{+}\nu \overline{\nu} $$ decay at the NA62 experiment at CERN requires high-performance particle identification to distinguish muons from pions. Calorimetric identific…
View article: A highly-compact and ultra-fast homogeneous electromagnetic calorimeter based on oriented lead tungstate crystals
A highly-compact and ultra-fast homogeneous electromagnetic calorimeter based on oriented lead tungstate crystals Open
Progress in high-energy physics has been closely tied to the development of high-performance electromagnetic calorimeters. Recent experiments have demonstrated the possibility to significantly accelerate the development of electromagnetic …
View article: First observation and study of the $K^{\pm} \rightarrow π^{0} π^{0} μ^{\pm} ν$ decay
First observation and study of the $K^{\pm} \rightarrow π^{0} π^{0} μ^{\pm} ν$ decay Open
The NA48/2 experiment at CERN reports the first observation of the $K^{\pm} \rightarrow π^{0} π^{0} μ^{\pm} ν$ decay based on a sample of 2437 candidates with 15% background contamination collected in 2003--2004. The decay branching ratio …
View article: Search for K+ decays into the π+e+e−e+e− final state
Search for K+ decays into the π+e+e−e+e− final state Open
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 1.4x10(-8) at 90% CL is obtained for the branching…
View article: A study of the K+ → π0e+νγ decay
A study of the K+ → π0e+νγ decay Open
A bstract A sample of 1 . 3 × 10 5 K + → π 0 e + νγ 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 th…
View article: Search for dark photon decays to μ+μ− at NA62
Search for dark photon decays to μ+μ− at NA62 Open
View article: Addendum to: A measurement of the K+ → π+μ+μ− decay
Addendum to: A measurement of the K+ → π+μ+μ− decay Open
A sample of 2.8⇥10 4 K + !⇡ + µ + µ candidates with negligible background was collected by the NA62 experiment at the CERN SPS in 2017-2018.The model-independent branching fraction is measured to be (9.15 ± 0.08) ⇥ 10 8 , a factor three mo…
View article: A study of the $K^+ \to π^0 e^+ νγ$ decay
A study of the $K^+ \to π^0 e^+ νγ$ decay Open
A sample of $1.3 \times 10^5$ $K^+ \to π^0 e^+ νγ$ 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 thr…
View article: Performance of the NA62 trigger system
Performance of the NA62 trigger system Open