Guillaume Unal

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The direct CP violation parameter Re( ′/ ) 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 devoted to collecting additional data under varied conditions compared to earlier years (1997–1999). The new data yield the result: Re( ′/ )= (13.7 ± 3.1)× 10−4. Combining this(More)
The decay rate of KL → π0γγ has been measured with the NA48 detector at the CERN SPS. A total of 2558 KL → π0γγ candidates have been observed with a residual background of 3.2%. The branching ratio is determined to be (1.36 ± 0.03(stat) ± 0.03(syst) ± 0.03(norm)) × 10−6 and the vector coupling constant av = −0.46± 0.03(stat) ± 0.04(syst). This result(More)
The influence of milk protein-based ingredients on the textural characteristics, sensory properties, and microstructure of probiotic yogurt during a refrigerated storage period of 28 d was studied. Milk was fortified with 2% (wt/vol) skim milk powder as control, 2% (wt/vol) sodium calcium caseinate (SCaCN), 2% (wt/vol) whey protein concentrate (WPC) or a(More)
The NA48 experiment at CERN has performed a new measurement of direct CP violation, based on data taken in 1997 0 0 q y Ž X . by simultaneously collecting K and K decays into p p and p p . The result for the CP violating parameter Re ́ r ́ L S Ž Ž . Ž .. y4 is 18.5"4.5 stat "5.8 syst =10 . q 1999 Elsevier Science B.V. All rights reserved. 1 Present(More)
F. Abe, M. G. Albrow, S. R. Amendolia, D. Amidei, J. Antos, C. AnwayWiese, G. Apollinari, H. Areti, M. Atac, P. Auchincloss, F. Azfar, P. Azzi, N. Bacchetta, W. Badgett, M. W. Bailey, J. Bao, P. de Barbaro, A. BarbaroGaltieri, V. E. Barnes, B. A. Barnett, P. Bartalini, G. Bauer, T. Baumann, F. Bedeschi, S. Behrends, S. Belforte, G. Bellettini, J. Bellinger,(More)
The NA48 experiments aims at a precise measurement of direct CP violation in the neutral Kaon system. This puts stringent requirements on the electromagnetic calorimeter used to detect photons of average energy 25 GeV. The choice of NA48 is a quasi homogeneous Liquid Krypton calorimeter with fast readout. The operation of this device and the performances(More)
The direct CP violation parameter Re(ǫ′/ǫ) 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 devoted to collecting additional data under varied conditions compared to earlier years (1997-99). The 2001 data yield the result: Re(ǫ/ǫ′) = (13.7 ± 3.1) × 10. Combining this(More)
The semileptonic decay of the neutral K meson, K L → πeν (Ke3), was used to study the strangeness-changing weak interaction of hadrons. A sample of 5.6 million reconstructed events recorded by the NA48 experiment was used to measure the Dalitz plot density. Admitting all possible Lorentz-covariant couplings, the form factors for vector (f+(q )), scalar (fS)(More)
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 emphasis on electromagnetic calorimeters. The topics discussed include: (a) the stationary and (b) the time dependent cases; (c) the limit of very large space(More)