Scientific Commons: Louis Fayard

Recherche du boson de Higgs dans le canal diphoton au LHC avec le detecteur ATLAS (2008)

The goal of this thesis is the preparation of the Higgs boson search in its diphoton decay at LHC with the ATLAS detector. The issues that have been studied deal with the Higgs to two photons vertex...

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...

Programme presentation, workshops presentation, Information on computing rules (2004)

Fayard, Louis, Ullaland, O

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 (2002)

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

The K_S -> gammagamma decay rate has been measured with the NA48 detector using a high intensity short neutral beam from the CERN SPS. The measured branching ratio BR(K_S) -> gammagamma = (2.78 +-...

A precision measurement of direct CP violation in the decay of neutral kaons into two pions (2002)

Batley, J Richard, Dosanjh, R S, Gershon, T J, Kalmus, George Ernest, Lazzeroni, C, Munday, D J, ...

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 running period was...

Presentation of the Summer Student Programme (2002)

Ullaland, O, Stevenson, Graham Roger, Fayard, Louis

Precise measurement of the decay $K_{L} \to \pi^{0}\gamma\gamma$ (2002)

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

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 branching...

A Measurement of the $K_{s}$ Lifetime (2002)

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

A measurement of the $\KS$ lifetime is presented using data recorded by the NA48 experiment at the CERN-SPS during 1998 and 1999. The $\KS$ lifetime is derived from the ratio of decay time...

A precise measurement of the direct CP violation parameter $Re(\epsilon'/\epsilon)$ (2001)

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

The direct CP violation parameter \Ree\ has been measured from the decay rates of neutral kaons into two pions using the NA48 detector at the CERN SPS. With 3.3 million \klpiopio\ events collected...

Search for the decay $K_{s} \to \pi^{0}e^{+}e^{-}$ (2001)

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

A search for the decay $\kspiee$ 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 $\ks$ beam, an upper limit for the...

Measurement of the quadratic slope parameter in the $K_{L}\rightarrow 3\pi^{0}$ decay Dalitz plot (2001)

Lai, A, Marras, D, Musa, L, Bevan, A, Dosanjh, R S, Gershon, T J, ...

A value of $ (-6.1\pm 0.9_{stat}\pm 0.5_{syst})\times 10^{-3} $ is obtained for the quadratic slope parameter $ h $ in the $ K_{L}\rightarrow 3\pi ^{0} $ decay Dalitz plot at the NA48...

A new measurement of the branching ratio of $K_{s} \to \gamma\gamma$ (2000)

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

The decay rate of $\ksgg$ has been measured with the NA48 detector at the CERN SPS. A total of $149$ $\ksgg$ events have been observed. The branching ratio is determined to be $(2.58 \pm0.36(stat)...

A new measurement of direct CP violation in two pion decays of the neutral kaon (1999)

Fanti, V, Lai, A, Marras, D, Musa, L, Bevan, A V, Gershon, T J, ...

The NA48 experiment at CERN has performed a new measurement of direct CP violation, based on data taken in 1997 by simultaneously collecting $kl$ and $ks$ decays into $pipin$ and $pipic$. The result...

Measurement of the decay rate and form factor parameter $\alpha_{K}*$ in the decay $K_{L} \rightarrow e^{+}e^{-}\gamma$ (1999)

Fanti, V, Lai, A, Musa, L, Marras, D, Nappi, A, Hay, B, ...

The decay rate of the neutral K meson $\mathrm{K_{L} \rightarrow e^{+}e^{-}\gamma}$ has been measured with the NA48 detector at the CERN SPS. A total of 6864 events has been observed with an...

Direct search for light gluinos (1998)

Fanti, V, Lai, A, Musa, L, Marras, D, Nappi, A, Hay, B, ...

We present the results for a direct search for light gluinos through the appearance of $\eta\rightarrow 3\pin$ with high transverse momentum in the vacuum tank of the NA48 experiment at CERN. We find...

Space charge in ionization detectors and the NA48 electromagnetic calorimeter (1998)

Palestini, S, Barr, Giles David, Ceccucci, Augusto, Cogan, J, Cundy, Donald C, Fischer, G, ...

The subject of space charge due to positive ions slowly moving in parallel plate ionization chambers is considered. A model for the degradation of the detector response is developed, with particular...

First Measurement of the Rate $K^0_L \to \pi \mu \nu \gamma$ (1997)

Bender, M, Augustin, I, Holder, M, Schwarze, I, Ziolkowski, M, Fanti, V, ...

In a preliminary version of the NA48 experiment at the CERN SPS, in which an iron- scintillator sandwich calorimeter was used as a photon detector, the ratio of K$_L \to \pi\mu\nu\gamma$ and K$_L \to...

Test beam results of a stereo preshower integrated in the liquid argon accordion calorimeter (1997)

Davis, R, Gingrich, D M, Greenious, G, Kitching, P, Olsen, B, Pinfold, James L, ...

This paper describes the construction of an integrated preshower within the RD3 liquid argon accordion calorimeter. It has a stereo view which enables the measurement of two transverse coordinates....

Performance of an endcap prototype of the ATLAS accordion electromagnetic calorimeter (1996)

Gingrich, D M, Pinfold, James L, Boos, E, Zhautykov, B O, Aubert, Bernard, Bazan, A, ...

The design and construction of a lead-liquid argon endcap calorimeter prototype using an accordion geometry and conceived as a sector of the inner wheel of the endcap calorimeter of the future ATLAS...

Construction and test of a fine-grained liquid argon preshower prototype (1996)

Davis, R, Gingrich, D M, Pinfold, J L, Rodning, N L, Boos, E, Zhautykov, B O, ...

A separate liquid argon preshower detector consisting of two layers featuring a fine granularity of 2.5~10$^{\mathrm{-3}}$ was studied by the RD3 collaboration. A prototype covering approximately 0.8...

Performance of a large scale prototype of the ATLAS accordion electromagnetic calorimeter (1995)

Gingrich, D M, Greeniaus, L G, Kitching, P, Olsen, B, Pinfold, James L, Rodning, N L, ...

Performance of a liquid argon accordion hadronic calorimeter prototype (1994)

Gingrich, D M, Greeniaus, L G, Kitching, P, Olsen, B, Pinfold, James L, Rodning, N L, ...

A search for new intermediate vector bosons and excited quarks decaying to two-jets at the CERN $\overline{p}$p collider (1993)

Alitti, J, Ambrosini, G, Ansari, R, Autiero, D, Bareyre, P, Bertram, I A, ...

Performance of a liquid argon preshower detector integrated with an accordion calorimeter (1992)

Aubert, Bernard, Bazan, A, Beaugiraud, B, Colas, Jacques, Le Flour, T, Maire, M, ...

Measurement of the gluon structure function from direct photon data at the CERN $\overline{p}$p collider (1992)

Alitti, J, Ambrosini, G, Ansari, R, Autiero, D, Bareyre, P, Bertram, I A, ...

Performance of a liquid argon electromagnetic calorimeter with a cylindrical accordion geometry (1992)

Aubert, Bernard, Bazan, A, Beaugiraud, B, Colas, Jacques, Le Flour, T, Maire, M, ...