H. Wahl

activity

20042025

most citedPrecise measurement of the K+- --> pi+-e+e- decay

76 citations · 408 across the 23 of their papers we have counts for

collaborators

23 papers

hep-ex2025

Searches for hidden sectors using $K^{+} \to π^{+} X$ decays

NA62 Collaboration

Results from the study of the rare decays $K^{+} \to π^{+} ν ν ˉ$ , $K^{+} \to π^{+} μ^{+} μ^{-}$ and $K^{+} \to π^{+} γ γ$ at the NA62 experiment at CERN are interpreted in terms…

hep-ex2025★ 5 cited

Search for hadronic decays of feebly-interacting particles at NA62

NA62 Collaboration

The NA62 experiment at CERN has the capability to collect data in a beam-dump mode, where 400 GeV protons are dumped on an absorber. In this configuration, New Physics particles, i…

hep-ex2024★ 13 cited

Observation of the $K^{+} \to π^{+} ν ν ˉ$ decay and measurement of its branching ratio

NA62 Collaboration

A measurement of the $K^{+} \to π^{+} ν ν ˉ$ decay by the NA62 experiment at the CERN SPS is presented, using data collected in 2021 and 2022. This dataset was recorded, afte…

hep-ex2024★ 3 cited

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. The candidate consists of a $K^+ \rightarrow μ^+…

hep-ex2023

Development of a new CEDAR for kaon identification at the NA62 experiment at CERN

The 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 hadro…

hep-ex2023★ 10 cited

Search for Leptonic Decays of Dark Photons at NA62

The 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 $1.4 \times 1 0^{17}$ protons on…

hep-ex2023

First observation and study of the $K^{\pm} \to π^{0} π^{0} μ^{\pm} ν$ decay

2 Collaboration, J. R. Batley, G. Kalmus +121

The NA48/2 experiment at CERN reports the first observation of the $K^{\pm} \to π^{0} π^{0} μ^{\pm} ν$ decay based on a sample of 2437 candidates with 15% background contam…

hep-ex2022★ 8 cited

A search for the $K^{+} \to μ^{-} ν e^{+} e^{+}$ decay

NA62 collaboration

A search for the $K^{+} \to μ^{-} ν e^{+} e^{+}$ decay, forbidden within the Standard Model by either lepton number or lepton flavour conservation depending on the flavour of the emitted neutri…

hep-ex2019★ 46 cited

Searches for lepton number violating $K^{+}$ decays

NA62 collaboration

The NA62 experiment at CERN reports a search for the lepton number violating decays $K^{+} \to π^{-} e^{+} e^{+}$ and $K^{+} \to π^{-} μ^{+} μ^{+}$ using a data sample collected in 2017. No signals are ob…

hep-ex2016★ 41 cited

Searches for Lepton Number Violation and Resonances in $K^{\pm} \to π μμ$ Decays

2 collaboration

The NA48/2 experiment at CERN collected a large sample of charged kaon decays to final states with multiple charged particles in 2003--2004. A new upper limit on the rate of the le…

hep-ex2016

Search for $K^{+} \to π^{+} ν ν ˉ$ at NA62

Matthew Moulson

The decay $K^{+} \to π^{+} ν ν ˉ$ is highly suppressed in the Standard Model (SM), while its rate can be predicted with minimal theoretical uncertainty. The branching ratio (BR) for this…

physics.ins-det2016

Recent results and prospects for NA62 experiment

Silvia Martellotti

The $K^{+} \to π^{+} ν ν ˉ$ decay is theoretically one of the cleanest meson decays and so a good place to look for indirect effects of new physics complementary to LHC search…

hep-ex2016

ChPT tests at the NA48 and NA62 experiments at CERN

NA48/2, NA62 Collaborations, : +159

The NA48/2 Collaboration at CERN has accumulated unprecedented statistics of rare kaon decays in the Ke4 modes: Ke4(+-) ( $K^{\pm} \to π^{+} π^{-} e^{\pm} ν$ ) and Ke4(00) ($K^\pm \to π^0 π^…

physics.ins-det2014★ 12 cited

The NA62 experiment at CERN: status and perspectives

Riccardo Fantechi

The NA62 experiment at CERN will measure the branching ratio of the K+ -> pi+ nu nubar decay with a precision of 10%, collecting about 100 events in two years of run. This paper wi…

hep-ex2012★ 19 cited

New measurement of the charged kaon semileptonic (Ke4) decay Branching Ratio and Hadronic Form Factors

2 Collaboration

A sample of more than one million Ke4 decay candidates with less than one percent background contamination has been collected by the NA48/2 experiment at the CERN SPS in 2003-2004,…

hep-ex2010★ 9 cited

New Precise Measurements of the $\xilamgam$ and $\xisiggam$ Decay Asymmetries

J. R. Batley

The decay asymmetries of the weak radiative Hyperon decays Xi0 \to Lambda gamma and Xi0 \to Sigma0 gamma have been measured with high precision using data of the NA48/1 experiment…

hep-ex2009★ 74 cited

Determination of the S-wave pi pi scattering lengths from a study of K+- -> pi+- pi0 pi0 decays

2 Collaboration

We report the results from a study of the full sample of ~ 6.031 10^7 K+- -> pi+- pi0 pi0 decays recorded by the NA48/2 experiment at the CERN SPS. As first observed in this experi…

hep-ex2009★ 76 cited

Precise measurement of the K+- --> pi+-e+e- decay

2 collaboration

A sample of 7253 $K^{\pm} \to π^{\pm} e^{+} e^{-} (γ)$ decay candidates with 1.0% background contamination has been collected by the NA48/2 experiment at the CERN SPS, allowing a precise measu…

hep-ex2007★ 16 cited

First Observation and Measurement of the Decay K+- -> pi+- e+ e- gamma

2 Collaboration, J. R. Batley

Using the full data set of the NA48/2 experiment, the decay K+- -> pi+- e+ e- gamma is observed for the first time, selecting 120 candidates with 7.3 +- 1.7 estimated background ev…

hep-ex2007★ 9 cited

First observation and branching fraction and decay parameter measurements of the weak radiative decay Xi0 --> Lambda e+e-

NA48 Collaboration

The weak radiative decay Xi0 --> Lambda e+e- has been detected for the first time. We find 412 candidates in the signal region, with an estimated background of 15 +/- 5 events. We…

hep-ex2007

Measurement of the Dalitz plot slope parameters of the $K^{\pm} \to π^{\pm} π^{+} π^{-}$ decay

2 Collaboration, J. R. Batley et al.

The distribution of the $K^{\pm} \to π^{\pm} π^{+} π^{-}$ decays in the Dalitz plot has been measured by the NA48/2 experiment at the CERN SPS with a sample of $4.71 \times 1 0^{8}$ fully reconstr…

hep-ex2006★ 15 cited

Search for direct CP violation in the decays K\pm \to 3π\pm

2 Collaboration, J. R. Batley

We report a measurement of the direct CP violation asymmetry parameter $A_{g}$ in charged kaon decays $K^{\pm} \to π^{\pm} π^{+} π^{-}$ by the NA48/2 experiment at the CERN SPS. The experiment h…

hep-ex2004★ 52 cited

Measurement of the branching ratio of the decay KL -> pi e nu and extraction of the CKM parameter |Vus|

NA48 collaboration

We present a new measurement of the branching ratio R of the decay KL -> pi e nu (Ke3), relative to all charged KL decays with two tracks, based on data taken with the NA48 detecto…

Searches for hidden sectors using K+→π+X decays

Search for hadronic decays of feebly-interacting particles at NA62

Observation of the K+→π+ννˉ decay and measurement of its branching ratio

First detection of a tagged neutrino in the NA62 experiment

Development of a new CEDAR for kaon identification at the NA62 experiment at CERN

Search for Leptonic Decays of Dark Photons at NA62

First observation and study of the K±→π0π0μ±ν decay

A search for the K+→μ−νe+e+ decay

Searches for lepton number violating K+ decays

Searches for Lepton Number Violation and Resonances in K±→πμμ Decays

Search for K+→π+ννˉ at NA62

Recent results and prospects for NA62 experiment

ChPT tests at the NA48 and NA62 experiments at CERN

The NA62 experiment at CERN: status and perspectives

New measurement of the charged kaon semileptonic (Ke4) decay Branching Ratio and Hadronic Form Factors

New Precise Measurements of the $\xilamgam$ and $\xisiggam$ Decay Asymmetries

Determination of the S-wave pi pi scattering lengths from a study of K+- -> pi+- pi0 pi0 decays

Precise measurement of the K+- --> pi+-e+e- decay

First Observation and Measurement of the Decay K+- -> pi+- e+ e- gamma

First observation and branching fraction and decay parameter measurements of the weak radiative decay Xi0 --> Lambda e+e-

Measurement of the Dalitz plot slope parameters of the K±→π±π+π− decay

Search for direct CP violation in the decays K\pm \to 3π\pm

Measurement of the branching ratio of the decay KL -> pi e nu and extraction of the CKM parameter |Vus|

Searches for hidden sectors using $K^{+} \to π^{+} X$ decays

Observation of the $K^{+} \to π^{+} ν ν ˉ$ decay and measurement of its branching ratio

First observation and study of the $K^{\pm} \to π^{0} π^{0} μ^{\pm} ν$ decay

A search for the $K^{+} \to μ^{-} ν e^{+} e^{+}$ decay

Searches for lepton number violating $K^{+}$ decays

Searches for Lepton Number Violation and Resonances in $K^{\pm} \to π μμ$ Decays

Search for $K^{+} \to π^{+} ν ν ˉ$ at NA62

Measurement of the Dalitz plot slope parameters of the $K^{\pm} \to π^{\pm} π^{+} π^{-}$ decay