Scientific Commons: V. D. Kekelidze

Search for direct CP violating charge asymmetries in $K^\pm\to\pi^\pm\pi^+\pi^-$ and $K^\pm\to\pi^\pm\pi^0\pi^0$ decays (2007)

Batley, J Richard, Culling, A J, Kalmus, George Ernest, Lazzeroni, C, Munday, D J, Slater, M W, ...

A measurement of the direct CP violating charge asymmetries of the Dalitz plot linear slopes $A_g=(g^+-g^-)/(g^++g^-)$ in $K^\pm\to\pi^\pm\pi^+\pi^-$ and $K^\pm\to\pi^\pm\pi^0\pi^0$ decays by the...

Measurements of the $\Xi^0$ Lifetime and the $\overline{\Xi^0}/\Xi^0$ Flux Ratio in a Neutral Beam (2007)

Batley, J Richard, Kalmus, George Ernest, Lazzeroni, C, Munday, D J, Patel, M, Slater, M W, ...

A total of 235 698 Xi0 -> Lambda pi0 and 21 527 anti-Xi0 -> anti-Lambda pi0 decays were selected from data obtained by the NA48/1 experiment at CERN. From this sample, the lifetime of the Xi0 hyperon...

The Beam and Detector for the NA48 Neutral Kaon CP Violation Experiment at CERN (2007)

Fanti, V, Lai, A, Marras, D, Musa, L, Nappi, A, Batley, J Richard, ...

The Beam and Detector, used for the NA48 experiment, devoted to the measurement of $Re(\epsilon^{\prime}/\epsilon)$, and for the NA48/1 experiment on rare K_S and neutral hyperon decays, are...

Measurement of $K^{0}_{\mu3}$ form factors (2007)

Bevan, A, Anzivino, G, Arcidiacono, R, Barr, G, Becker, H G, Bernhard, R, ...

This paper reports on a new high precision measurement of the form factors of the K_{L}\to \pi^{\pm} \mu^{\mp} \nu_{\mu} decay. The data sample of about 2.3$\times 10^{6}$ events was recorded in 1999...

First observation and branching fraction and decay parameter measurements of the weak radiative decay $\Xi^0 \to \Lambda e^{+}e^{-}$ (2007)

Batley, J Richard, Kalmus, George Ernest, Lazzeroni, C, Munday, D J, Patel, M, Slater, M W, ...

The weak radiative decay $Xi^0 -> \Lambda e^+ e^- $ has been detected for the first time. We find 412 candidates in the signal region, with an estimated background of $15pm 5$ events. We determine...

Measurement of the Dalitz plot slopes of the $K^\pm\to\pi^\pm\pi^+\pi^-$ decay (2007)

Batley, J Richard, Culling, A J, Kalmus, George Ernest, Lazzeroni, C, Munday, D J, Slater, M W, ...

The distribution of the $K^\pm\to\pi^\pm\pi^+\pi^-$ decays in the Dalitz plot has been measured by the NA48/2 experiment at the CERN SPS with a sample of $4.71\times 10^8$ fully reconstructed events....

Measurements of Charged Kaon Semileptonic Decay Branching Fractions $K^{+-} \to \pi^0 \mu^{+-} \nu$ and $K^{+-} \to \pi^0 e^{+-} \nu$ and Their Ratio (2007)

Batley, J R, Anzivino, Giuseppina, Arcidiacono, R, Baldini, W, Balev, S, Behler, M, ...

Measured ratios of decay rates for $\rkekp$, $\rkmukp$ and $\rkmuke$ are presented. These measurements are based on $K^\pm$ decays collected in a dedicated run in 2003 by the NA48/2 experiment at...

Measurements of Charged Kaon Semileptonic Decays Branching Fractions $K\pm \to \pi^{0}\mu\pm \nu$ and $K\pm \to \pi^{0} e\pm \nu$ and Their Ratio (2006)

Batley, J R, Sozzi, M, Pierazzini, G M, Michetti, A, Mannell, I, Lamanna, G, ...

Measured ratios of decay rates for $\rkekp$, $\rkmukp$ and $\rkmuke$ are presented. These measurements are based on $K^\pm$ decays collected in a dedicated run in 2003 by the NA48/2 experiment at...

Measurement of the branching ratios of the decays $\Xi^0 \to \sigma^+ e^- \bar{\nu}_e$ and $anti-\Xi^0 \to anti-\sigma^+ e+ \nu_e$ (2006)

Batley, J R, Anzivino, G, Arcidiacono, R, Baldini, W, Behler, M, Biino, C, ...

From 56 days of data taking in 2002, the NA48/1 experiment observed 6316 Xi0 --> Sigma+ e- nubar candidates (with the subsequent Sigma+ --> p pi0 decay) and 555 anti-Xi0 --> anti-Sigma+ e+ nu...

Measurement of the Ratio Gamma $(KL \to \pi^{+} \pi^{-})/Gamma(KL \to \pi e \nu)$ and Extraction of the CP Violation Parameter $|\eta+-|$ (2006)

Lai, A, Anzivino, G, Arcidiacono, R, Barr, G, Becker, H G, Bertanza, L, ...

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 dedicated run in...

Measurement of the Ratio $\Gamma(K_L \rightarrow \pi^+\pi^-) / \Gamma(K_L \rightarrow \pi^{\pm}e^{\mp}\nu)$ and Extraction of the CP Violation Parameter $|\eta_{+-}|$ (2006)

Lai, A, Anzivino, Giuseppina, Arcidiacono, R, Barr, G, Becker, H G, Bertanza, L, ...

We present a measurement of the ratio of the decay rates $\Gamma (K_L \rightarrow\pi^+\pi^-) / \Gamma(K_L \rightarrow\pi^{\pm}e^{\mp}\nu)$, denoted as $\Gamma_{K2\pi}/\Gamma_{Ke3}$. The analysis is...

Measurement of $k^0 _{\mu 3}$ form factors (2006)

Lai, A, Marras, D, Bevan, A, Dosanjh, R S, Gershon, T J, Hay, B, ...

This paper reports on a new high precision measurement of the form factors of the $\rm K_{L}\rightarrow~\pi^{\pm}~\mu^{\mp}~\nu_{\mu}$} decay. The data sample of about 2.3X10^6 events was recorded in...

Measurement of the branching ratios of the decays $\Xi^{0}\rightarrow \sigma^{+} e^{-} \overline{\nu}_{e}$ and $\overline{\Xi^{0}}\rightarrow \overline{\sigma^{+}} e^{+} \nu_{e}$ (2006)

Batley, J Richard, Anzivino, Giuseppina, Arcidiacono, R, Baldini, W, Behler, M, Biino, C, ...

From 56 days of data taking in 2002, the NA48/1 experiment observed 6316 $\Xi^{0}\rightarrow \Sigma^{+} e^{-} \overline{\nu}_{e}$ candidates (with the subsequent $\Sigma^{+} \rightarrow p \pi^{0}$...

Search for direct CP-violation in $K^{\pm}\to \pi^{\pm}\pi^{0}\pi^{0}$ decays (2006)

Batley, J Richard, Culling, A J, Kalmus, George Ernest, Lazzeroni, C, Munday, D J, Slater, M W, ...

A search for direct CP-violation in K+- --> pi+-pi0pi0 decays based on 47.14 million events has been performed by the NA48/2 experiment at the CERN SPS. The asymmetry in the Dalitz plot linear slopes...

Search for direct CP-violation in $K^{\pm} \to \pi^{\pm} \pi^{0} \pi^{0}$ decays (2006)

Batley, J Richard, Culling, A J, Kalmus, George Ernest, Lazzeroni, C, Munday, D J, Slater, M W, ...

A search for direct CP-violation in $K^{\pm}\rightarrow \pi^\pm \pi^0 \pi^0$ decay based on 47.14 million events has been performed by the NA48/2 experiment at the CERN SPS. The asymmetry in the...

Observation of a cusp-like structure in the $\pi^{0}\pi^{0}$ invariant mass distribution from $K^{+-} \to \pi^{+-}\pi^{0}\pi^{0}$ decay and determination of the $\pi\pi$ scattering lengths (2005)

Batley, J Richard, Anzivino, Giuseppina, Arcidiacono, R, Baldini, W, Balev, S, Behler, M, ...

We report the results from a study of ~23 Million K+- ==> pi+- pizero pizero decays recorded by the NA48/2 experiment at the CERN SPS, showing an anomaly in the pizero pizero invariant mass...

A measurement of the CP-conserving component of the Decay $K^{O}_{S} \to \pi^{+}\pi^{-}\pi^{0}$ (2005)

Batley, J Richard, Lazzeroni, C, Munday, D J, Patel, M, Slater, M W, Wotton, S A, ...

The NA48 collaboration has measured the amplitude of the CP-conserving component of the decay K^0_S -> \pi^+ \pi^- \pi^0 relative to K^0_L -> \pi ^+ \pi^- \pi ^0. For the characteristic parameter...

Measurement of the $K_{L} \to e^{+}e^{-}e^{+} e^{-}$ Decay Rate (2005)

Lai, A, Bearden, I G, Marras, D, Batley, J Richard, Dosanjh, R S, Gershon, T J, ...

The decay rate of the long-lived neutral 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 1998 and 1999, a total of 200...

Measurement of the $\Xi^0 \rightarrow \Lambda gamma$ decay asymmetry and branching fraction (2004)

Lai, A., Marras, D., Bevan, A., Dosanjh, R S., Gershon, T J., Hay, B., ...

In data taken with the NA48 experiment at the CERN SPS in 1999, 730 candidates of the weak radiative hyperon decay Xi0 -> Lambda gamma have been found with an estimated background of 58+-8 events....

Measurement of the $\Xi^0 \rightarrow \Lambda gamma$ decay asymmetry and branching fraction (2004)

Lai, A., Marras, D., Bevan, A., Dosanjh, R S., Gershon, T J., Hay, B., ...

In data taken with the NA48 experiment at the CERN SPS in 1999, 730 candidates of the weak radiative hyperon decay Xi0 -> Lambda gamma have been found with an estimated background of 58+-8 events....

Measurement of the $\Xi^0 \rightarrow \Lambda gamma$ decay asymmetry and branching fraction (2004)

Lai, A., Marras, D., Bevan, A., Dosanjh, R S., Gershon, T J., Hay, B., ...

In data taken with the NA48 experiment at the CERN SPS in 1999, 730 candidates of the weak radiative hyperon decay Xi0 -> Lambda gamma have been found with an estimated background of 58+-8 events....

Measurement of the $\Xi^0 \rightarrow \Lambda gamma$ decay asymmetry and branching fraction (2004)

Lai, A., Marras, D., Bevan, A., Dosanjh, R S., Gershon, T J., Hay, B., ...

In data taken with the NA48 experiment at the CERN SPS in 1999, 730 candidates of the weak radiative hyperon decay Xi0 -> Lambda gamma have been found with an estimated background of 58+-8 events....

Measurement of the $\Xi^0 \rightarrow \Lambda gamma$ decay asymmetry and branching fraction (2004)

Lai, A., Marras, D., Bevan, A., Dosanjh, R S., Gershon, T J., Hay, B., ...

In data taken with the NA48 experiment at the CERN SPS in 1999, 730 candidates of the weak radiative hyperon decay Xi0 -> Lambda gamma have been found with an estimated background of 58+-8 events....

Measurement of the $\Xi^0 \rightarrow \Lambda\gamma$ Decay Asymmetry and Branching Fraction (2003)

Lai, A, Marras, D, Bevan, A, Dosanjh, R S, Gershon, T J, Hay, B, ...

In data taken with the NA48 experiment at the CERN SPS in 1999, 730 candidates of the weak radiative hyperon decay Xi0 -> Lambda gamma have been found with an estimated background of 58 +- 8 events....

Observation of the rare decay $K_S \rightarrow \pi^0 \mathrm{e}^+\mathrm{e}^-$ (2003)

Batley, J Richard, Kalmus, George Ernest, Lazzeroni, C, Munday, D J, Patel, M, Slater, M W, ...

A search for the decay K_S -> pi0e+e- has been made by the NA48/1 experiment at the CERN SPS accelerator. Using data collected during 89 days in 2002 with a high-intensity K_S beam, 7 events were...

First observation of the $K_{S}\to \pi^{0}\gamma\gamma$ decay (2003)

Lai, A, Marras, D, Batley, J Richard, Dosanjh, R S, Gershon, T J, Kalmus, George Ernest, ...

Using the NA48 detector at the CERN SPS, 31K_S -> \pi^0\gamma\gamma candidates with an estimated background of 13.7 +- 3.2 events have been observed. This first observation leads to a branching ratio...

Investigation of $K_{L,S} \rightarrow \pi^{+}\pi^{-}e^{+}e^{-}$ decays (2003)

Lai, A, Anzivino, Giuseppina, Arcidiacono, R, Barr, G, Becker, H G, Bevan, A, ...

The K_L -> pi+pi-e+e- and K_S -> pi+pi-e+e- decay modes have been studied in detail using the NA48 detector at CERN SPS. Based on the data collected during the 1998 and 1999 run periods, a sample of...

Search for the decay $K_{s} \to \pi^{0}\gamma\gamma$ (2003)

Lai, A, Marras, D, Batley, J Richard, Bevan, A, Dosanjh, R S, Gershon, T J, ...

A search for the decay $K_S\to\pi^0\gamma\gamma$ has been made using the NA48 detector at the CERN SPS. Using data collected in 1999 during a 40-hour run with a high-intensity $K_S$ beam, an upper...

Precise measurements of the $K_{S} \to \gamma\gamma$ and $K_{L} \to \gamma\gamma$ decay rates (2003)

Lai, A., Marras, D., Batley, J R., Dosanjh, R S., Gershon, T J., Kalmus, G E., ...