Angelopoulos, Angelos, Aslanides, Elie, Backenstoss, Gerhard, Bargassa, P, Behnke, O, Benelli, A, ...
A detailed description of the analysis of neutral kaons decaying to \pen\ is given, based on the complete set of data collected with the CPLEAR experiment. Using a novel approach involving initially...
Apostolakis, Alcibiades J, Aslanides, Elie, Backenstoss, Gerhard, Bargassa, P, Behnke, O, Benelli, A, ...
A detailed description is given of the analysis of neutral kaons decaying to \pipi , based on the complete data sample collected with the CPLEAR experiment.Using a novel approach involving initially...
Measurement of the energy dependence of the form factor $f_{+}$ in $K^{0}_{e3}$ decay (1999)
Apostolakis, Alcibiades J, Aslanides, Elie, Backenstoss, Gerhard, Bargassa, P, Behnke, O, Benelli, A, ...
Neutral-kaon decays to \pielnu\ % recorded by the CPLEAR experimentwere analysed to determine the $q^2$ dependence of the \Kzet\ electroweak form factor $f_+$. Based on $365\,612$ events,this form...
Dispersion relation analysis of the neutral kaon regeneration amplitude in carbon (1999)
Angelopoulos, Angelos, Apostolakis, Alcibiades J, Locher, M P, Markushin, V E, Aslanides, Elie, Backenstoss, Gerhard, ...
We apply a forward dispersion relation to the regeneration amplitude for kaon scattering on /sup 12/C using all available data. The CPLEAR data at low energies allow the determination of the net...
$K^{0}-\overline{K}^{0}$ mass and decay-width differences: CPLEAR evaluation (1999)
Angelopoulos, Angelos, Apostolakis, Alcibiades J, Aslanides, Elie, Backenstoss, Gerhard, Bargassa, P, Behnke, O, ...
The CPT-violation parameters \redd\ and \imd\ determined recently by CPLEAR are used to evaluate the \kn --\knb\ mass and decay-width differences, as given by the difference between the diagonal...
Apostolakis, Alcibiades J, Aslanides, Elie, Backenstoss, Gerhard, Bargassa, P, Behnke, O, Benelli, A, ...
We report a measurement of the CP violation parameter $\eta$ from the time-dependent asymmetry between the decay rates of initially tagged \kn\ and \knb . The results are based on the complete data...
Apostolakis, Alcibiades J, Aslanides, Elie, Backenstoss, Gerhard, Bargassa, P, Behnke, O, Benelli, A, ...
Data from the CPLEAR experiment, together with the most recent world averages for some of the neutral-kaon parameters, were constrained with the Bell--Steinberger (or unitarity) relation, allowing...
Tests of the equivalence principle with neutral kaons (1999)
Apostolakis, Alcibiades J, Aslanides, Elie, Backenstoss, Gerhard, Bargassa, P, Behnke, O, Benelli, A, ...
We test the Principle of Equivalence for particles and antiparticles, using CPLEAR data on tagged Pkao and Pkab decays into $pi^+ pi^-$. For the first time, we search for possible annual, monthly and...
Angelopoulos, Angelos, Apostolakis, Alcibiades J, Aslanides, Elie, Backenstoss, Gerhard, Bargassa, P, Behnke, O, ...
We report on a new measurement of the \kl--\ks\ mass difference \dm\ using the CPLEAR full data sample of neutral-kaon decays to \semi. The result is $\dm = (0.5295 \pm 0.0020_{\stat} \pm...
Angelopoulos, Angelos, Apostolakis, Alcibiades J, Aslanides, Elie, Backenstoss, Gerhard, Bargassa, P, Behnke, O, ...
We have improved by two orders of magnitude the limit currently available for the CPT violation parameter \red . To this purpose we have analyzed the full sample of neutral-kaon decays to \semi\...
First direct observation of time-reversal non-invariance in the neutral-kaon system (1998)
Angelopoulos, Angelos, Apostolakis, Alcibiades J, Aslanides, Elie, Backenstoss, Gerhard, Bargassa, P, Behnke, O, ...
We report on the first observation of time-reversal symmetry violation through a comparison of the probabilities of $\knb$ transforming into $\kn$ and $\kn$ into $\knb$ as a function of the...
The neutral kaon decays to ${\pi^+ \pi^- \pi^0$}: a detailed analysis of the CPLEAR data (1998)
Angelopoulos, Angelos, Apostolakis, Alcibiades J, Aslanides, Elie, Backenstoss, Gerhard, Bargassa, P, Behnke, O, ...
A detailed analysis of neutral kaons decaying to \Pgpp \Pgpm \Pgpz\ is presented based on the complete data set containing half a million events. Time-dependent decay rate asymmetries are measured...
Angelopoulos, Angelos, Apostolakis, Alcibiades J, Aslanides, Elie, Backenstoss, Gerhard, Bargassa, P, Behnke, O, ...
The CPLEAR experiment measured the eigentime-dependent asymmetry in the rates of initially tagged \kzerob\ and \kzero\ decaying to \threepizero\ in order to study the interference between the...
Angelopoulos, Angelos, Apostolakis, Alcibiades J, Aslanides, Elie, Backenstoss, Gerhard, Bargassa, P, Behnke, O, ...
The CP-violation parameter \etazero\ is determined through the eigentime-dependent asymmetry in the rates of initially tagged \kzerob\ and \kzero\ decaying to \pizero \pizero. From the analysis of...
An EPR experiment testing the non-separability of the $K^{0} \overline{K^{0}}$ wave function (1997)
Apostolakis, Alcibiades J, Aslanides, Elie, Backenstoss, Gerhard, Bargassa, P, Behnke, O, Benelli, A, ...
The EPR-type strangeness correlation in the \PKz \PaKz ~system produced in the reaction $\Pap \Pp \rightarrow \PKz \PaKz$ at rest has been tested using the CPLEAR detector. The strangeness was tagged...
Angelopoulos, Angelos, Apostolakis, Alcibiades J, Aslanides, Elie, Backenstoss, Gerhard, Bargassa, P, Behnke, O, ...
We study $\pi\pi$ correlations in the exclusive reaction $\ppb \to 2\pi^+2\pi^-$ at rest measured by the CPLEAR experiment. Avoiding the introduction of an arbitrary reference sample, we analyse...
Measurement of the neutral kaon regeneration amplitude in carbon at momenta below 1 GeV/c (1997)
Angelopoulos, Angelos, Apostolakis, Alcibiades J, Aslanides, Elie, Backenstoss, Gerhard, Bargassa, P, Behnke, O, ...
The neutral kaon regeneration amplitude in carbon at momenta between 250 and 750~MeV/$c$ was determined by measuring the interference of inherent and coherently regenerated \PKS\ amplitudes. This...
CPLEAR results on the CP parameters of neutral kaons decaying to $\pi^+ \pi^- \pi^0$ (1997)
Adler, R, Angelopoulos, Angelos, Apostolakis, Alcibiades J, Aslanides, Elie, Backenstoss, Gerhard, Bargassa, P, ...
The CPLEAR experiment measured time-dependent decay-rate asymmetries of \PKz\ and \PaKz\ decaying to \pipmz\ in order to study the interference between the decay amplitudes of \PKzS\ --- either...
Contribution of CPLEAR to the physics of the neutral kaon system (1997)
Pavlopoulos, P, Adler, R, Alhalel, T, Angelopoulos, Angelos, Apostolakis, Alcibiades J, Aslanides, Elie, ...
We present the physics results of the CP-- and CPT--violation measurements performed by CPLEAR. CPLEAR has experimentally determined for the first time, the violation of T invariance and is able to...
The CPLEAR detector at CERN (1996)
Adler, R, Albrecht, W, Alhalel, T, Angelopoulos, Angelos, Apostolakis, Alcibiades J, Aslanides, Elie, ...
The CPLEAR collaboration has constructed a detector at CERN for an extensive programme of CP-, T- and CPT-symmetry studies using ${\rm K}^0$ and $\bar{\rm K}^0$ produced by the annihilation of...
Observation of the CP-conserving K$_{S}$ --> $\pi^{+}\pi^{- }\pi^{0}$ decay amplitude (1996)
Adler, R, Alhalel, T, Angelopoulos, Angelos, Aspostolakis, A, Aslanides, Elie, Backenstoss, Gerhard, ...
The interference between CP-conserving $\ks$ and $\kl \rightarrow \threepi$ decay amplitudes was observed by studying the decay rate asymmetries between initial $\ko$ and $\kob$ separately for the...
Search for CP-violation in the decay of neutral kaons to $\pi^{+}\pi^{- }\pi^{0}$ (1996)
Adler, R, Alhalel, T, Angelopoulos, Angelos, Apostolakis, Alcibiades J, Aslanides, Elie, Backenstoss, Gerhard, ...
The time-dependent rate asymmetry of initial \ko and \kob decaying into \threepi was measured in order to reveal the CP-violating amplitude of the \ks \rightarrow \threepi decay. For the real and the...