408 citations · 2.8k across the 40 of their papers we have counts for
26 papers · 1 filter
Polish national input to the 2026 update of the European Strategy for Particle Physics
K. Adamczyk, B. Badełek, T. Banaszkiewicz +59
The Polish high energy physics (HEP) community fully recognizes the urgent need to host at CERN a flagship project implementing a broad, long-term, and comprehensive vision of part…
First observation and study of the decay
2 Collaboration, J. R. Batley, G. Kalmus +121
The NA48/2 experiment at CERN reports the first observation of the decay based on a sample of 2437 candidates with 15% background contam…
Searches for Lepton Number Violation and Resonances in 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…
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(+-) () and Ke4(00) ($K^\pm \to π^0 π^…
Recent NA48/2 and NA62 results
F. Ambrosino, A. Antonelli, G. Anzivino +156
The NA48/2 Collaboration at CERN has accumulated and analysed unprecedented statistics of rare kaon decays in the modes: () and $K_…
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,…
Empirical parameterization of the K+- -> pi+- pi0 pi0 decay Dalitz plot
J. R. Batley, A. J. Culling, G. Kalmus +118
As first observed by the NA48/2 experiment at the CERN SPS, the $\p0p0$ invariant mass (M00) distribution from $\kcnn$ decay shows a cusp-like anomaly at M00=2m+, where m+ is the c…
Measurement of the direct emission and interference terms and search for CP violation in the decay K\pm -> π\pmπ^0 g
2 Collaboration
We report on the measurement of the direct emission (DE) and interference (INT) terms of the K\pm -> π\pmπ^0 g decay by the NA48/2 experiment at the CERN SPS. From the data collect…
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…
Precise measurement of the K+- --> pi+-e+e- decay
2 collaboration
A sample of 7253 decay candidates with 1.0% background contamination has been collected by the NA48/2 experiment at the CERN SPS, allowing a precise measu…
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…
Measurement of the Dalitz plot slope parameters of the decay
2 Collaboration, J. R. Batley et al.
The distribution of the decays in the Dalitz plot has been measured by the NA48/2 experiment at the CERN SPS with a sample of fully reconstr…
Measurement of K^{0}_{\mu3} form factors
The NA48 Collaboration
This paper reports on a new high precision measurement of the form factors of the K_{L}\to π^{\pm} μ^{\mp} ν_μ decay. The data sample of about 2.3 events was recorde…
Measurement of the Ratio Gamma(KL -> pi+ pi-)/Gamma(KL -> pi e nu) and Extraction of the CP Violation Parameter |eta+-|
NA48 Collaboration
We present a measurement of the ratio of the decay rates Gamma(KL -> pi+ pi-)/Gamma(KL -> pi e nu), denoted as Gamma(K2pi)/Gamma(Ke3). The analysis is based on data taken during a…
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 in charged kaon decays by the NA48/2 experiment at the CERN SPS. The experiment h…
Measurement of K^0_e3 form factors
NA48 collaboration
The semileptonic decay of the neutral K meson, KL -> pi e nu (Ke3), was used to study the strangeness-changing weak interaction of hadrons. A sample of 5.6 million reconstructed ev…
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…
Search for CP violation in K0 -> 3 pi0 decays
NA48 Collaboration
Using data taken during the year 2000 with the NA48 detector at the CERN SPS, a search for the CP violating decay K_S -> 3 pi0 has been performed. From a fit to the lifetime distri…
First observation of the KS->pi0 gamma gamma decay
NA48 Collaboration
Using the NA48 detector at the CERN SPS, 31 KS->pi0 gamma gamma candidates with an estimated background of 13.7 +- 3.2 events have been observed. This first observation leads to a…
Precise measurement of the decay
A. Lai
The decay rate of $\klpgg$ has been measured with the NA48 detector at the CERN SPS. A total of 2558 $\klpgg$ candidates have been observed with a residual background of 3.2%. The…
New measurements of the and masses
A. Lai, NA48 collaboration
New measurements of the and masses have been performed using decays to 3 with the NA48 detector at the CERN SPS. Using symmetric decays to reduce systematic effects,…
Measurement of the K_L -> e+ e- e+ e- Decay Rate
A. Lai
The decay rate of the neutral long-lived K meson into the e+ e- e+ e- final state has been measured with the NA48 detector at the CERN SPS. Using data collected in 1999, a total of…
A new measurement of direct CP violation in two pion decays of the neutral kaon
The NA48 Collaboration, V. Fanti
The NA48 experiment at CERN has performed a new measurement of direct CP violation, based on data taken in 1997 by simultaneously collecting K_L and K_S decays into pi0pi0 and pi+p…
Spin Structure of the Proton from Polarized Inclusive Deep-Inelastic Muon-Proton Scattering
D. Adams
We have measured the spin-dependent structure function in inclusive deep-inelastic scattering of polarized muons off polarized protons, in the kinematic range $0.003 < x <…