M. Scarpa

activity

20012023

most citedA precision measurement of direct CP violation in the decay of neutral kaons into two pions

238 citations · 783 across the 19 of their papers we have counts for

collaborators

19 papers

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-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

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^…

hep-ex2014

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 $K_{e 4}$ modes: $K_{e 4} (+ -)$ ( $K^{\pm} \to π^{+} π^{-} e^{\pm} ν$ ) and $K_…

hep-ex2013★ 6 cited

Measurement of the branching ratio of the decay $Ξ^{0} \to Σ^{+} μ^{-} ν ˉ_{μ}$

J. R. Batley, G. E. Kalmus, C. Lazzeroni +110

From the 2002 data taking with a neutral kaon beam extracted from the CERN-SPS, the NA48/1 experiment observed 97 $Ξ^{0} \to Σ^{+} μ^{-} ν ˉ_{μ}$ candidates with a backgroun…

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-ex2010★ 12 cited

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…

hep-ex2010★ 22 cited

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…

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★ 98 cited

Search for direct CP violating charge asymmetries in $K^{\pm} \to π^{\pm} π^{+} π^{-}$ and $K^{\pm} \to π^{\pm} π^{0} π^{0}$ decays

J. R. Batley

A measurement of the direct CP violating charge asymmetries of the Dalitz plot linear slopes $A_{g} = (g^{+} - g^{-}) / (g^{+} + g^{-})$ in $K^{\pm} \to π^{\pm} π^{+} π^{-}$ and $K^{\pm} \to π^{\pm} π^{0} π^{0}$ decays by…

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-ex2002★ 238 cited

A precision measurement of direct CP violation in the decay of neutral kaons into two pions

J. R. Batley, NA48 collaboration

The direct CP violation parameter Re(epsilon'/epsilon) has been measured from the decay rates of neutral kaons into two pions using the NA48 detector at the CERN SPS. The 2001 runn…

hep-ex2002★ 26 cited

New measurements of the $η$ and $K^{0}$ masses

A. Lai, NA48 collaboration

New measurements of the $η$ and $K^{0}$ masses have been performed using decays to 3 $π^{0}$ with the NA48 detector at the CERN SPS. Using symmetric decays to reduce systematic effects,…

hep-ex2001★ 122 cited

A precise measurement of the direct CP violation parameter Re(epsilon'/epsilon)

NA48 Collaboration

The direct CP violation parameter Re(epsilon'/epsilon) has been measured from the decay rates of neutral kaons into two pions using the NA48 detector at the CERN SPS. With 3.3 mill…

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

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

ChPT tests at the NA48 and NA62 experiments at CERN

Recent NA48/2 and NA62 results

Measurement of the branching ratio of the decay Ξ0→Σ+μ−νˉμ​

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

Empirical parameterization of the K+- -> pi+- pi0 pi0 decay Dalitz plot

Measurement of the direct emission and interference terms and search for CP violation in the decay K\pm -> π\pmπ^0 g

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

Search for direct CP violating charge asymmetries in K±→π±π+π− and K±→π±π0π0 decays

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

A precision measurement of direct CP violation in the decay of neutral kaons into two pions

New measurements of the η and K0 masses

A precise measurement of the direct CP violation parameter Re(epsilon'/epsilon)

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

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

Measurement of the branching ratio of the decay $Ξ^{0} \to Σ^{+} μ^{-} ν ˉ_{μ}$

Search for direct CP violating charge asymmetries in $K^{\pm} \to π^{\pm} π^{+} π^{-}$ and $K^{\pm} \to π^{\pm} π^{0} π^{0}$ decays

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

New measurements of the $η$ and $K^{0}$ masses