G. D. I. Barr

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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)
A Monte-Carlo calculation of the atmospheric neutrino fluxes [1, 2] has been extended to take account of the three-dimensional (3D) nature of the problem, including the bending of secondary particles in the geomagnetic field. Emphasis has been placed on minimizing the approximations when introducing the 3D considerations. In this paper, we describe the(More)
In early 2010, the Long-Baseline Neutrino Experiment (LBNE) science collaboration initiated a study to investigate the physics potential of the experiment with a broad set of different beam, nearand far-detector configurations. Nine initial topics were identified as scientific areas that motivate construction of a long-baseline neutrino experiment with a(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; (b) the time dependent cases; (c) the limit of very large space(More)
The NA48 collaboration is preparing a new experiment at CERN aiming to study CP violation in the K”-K” system with an accuracy of 2 X 10mJ in the parameter Be(&l+ Decays in two no’s will be recorded by a quasi-homogeneous liquid krypton calorimeter. A liquid krypton calorimeter has been chosen to combine good energy, position and time resolution with(More)
The aim of the study was to determine the effectiveness of cimetidine in a dose of 400 mg twice daily in the prevention of gastric ulcer recurrence over a 2-yr period. The trial was double-blind and placebo-controlled; 24 patients received cimetidine and 25 received placebo. All had had a gastric ulcer within the prior 6 wk, and healing was demonstrated by(More)
Olsalazine (azodisalicylate) is a new drug in which two molecules of 5-aminosalicylic acid are linked by an azo bond. Its role in the treatment of mildly active, distal ulcerative colitis was investigated. Sixty patients were randomly allocated to receive olsalazine 1 g or a placebo as a retention enema nightly for two weeks. Clinical improvement was seen(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)