Giles Barr: Publications

The atmospheric neutrino flavor ratio from a 3.9 fiducial kiloton-year exposure of Soudan 2

Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 449:1-2 (1999) 137-144

Authors:

WWM Allison, GJ Alner, DS Ayres, G Barr, WL Barrett, C Bode, PM Border, CB Brooks, JH Cobb, RJ Cotton, H Courant, DM Demuth, TH Fields, HR Gallagher, C Garcia-Garcia, MC Goodman, R Gran, T Joffe-Minor, T Kafka, SMS Kasahara, W Leeson, PJ Litchfield, NP Longley, WA Mann, ML Marshak, RH Milburn, WH Miller, L Mualem, A Napier, WP Oliver, GF Pearce, EA Peterson, DA Petyt, LE Price, K Ruddick, M Sanchez, J Schneps, MH Schub, R Seidlein, A Stassinakis, JL Thron, V Vassiliev, G Villaume, S Wakely, D Wall, N West, UM Wielgosz

Abstract:

We report a measurement of the atmospheric neutrino flavor ratio, R, using a sample of quasi-elastic neutrino interactions occurring in an iron medium. The flavor ratio (tracks/showers) of atmospheric neutrinos in a 3.9 fiducial kiloton-year exposure of Soudan 2 is 0.64 ± 0.11(stat.) ± 0.06(syst.) of that expected. Important aspects of our main analysis have been checked by carrying out two independent, alternative analyses; one is based upon automated scanning, the other uses a multivariate approach for background subtraction. Similar results are found by all three approaches. © 1999 Elsevier Science B.V. All rights reserved.

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A measurement of the transverse polarization of Lambda-hyperons produced in inelastic pN-reactions at 450 GeV proton energy

6 (1999) 265-269

Authors:

V Fanti, A Lai, L Musa, A Nappi, MG Setzu, RW Moore, DJ Munday, MA Parker, SF Takach, TO White, G Barr, G Bocquet, J Bremer, A Ceccucci, J Cogan, D Cundy, N Doble, G Fischer, W Funk, L Gatignon, A Gianoli, A Gonidec, P Grafstrom, W Kubischta, V Marzulli, G Kesseler, JP Matheys, A Norton, S Palestini, B Pazer-Steindel, D Schinzel, H Taureg, M Velasco, O Vossnack, H Wahl, V Kekelidze, I Kojevnikov, Y Potrebenikov, P Hristov, G Tatishvili, A Tkatchev, L Bertolotto, O Boyle, B Hay, NE McKay, G Oakland, H Parsons, KJ Peach, C Talamonti, A Walker, P Dalpiaz, J Duclos, A Formica, PL Frabetti, M Martini, F Petrucci, M Porcu, F Rossi, M Savrie, C Simani, A Bizzeti, M Calvetti, M Lenti, A Michetti, HG Becker, T Beier, H Blumer, P Buchholz, D Coward, C Ebersberger, A Kalter, K Kleinknecht, U Koch, L Kopke, F Leber, S Luitz, B Renk, J Scheidt, J Schmidt, V Schonharting, R Wilhelm, O Zeitnitz, JC Chollet, S Crepe, L Fayard, L Iconomidou-Fayard, J Ocariz, G Unal, G Anzivino, P Cenci, P Lubrano, M Pepe, P Calafiura, R Carosi, R Casali, C Cerri, F Costantini, R Fantechi, S Giudici, B Gorini

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

465 (1999) 335-348

Authors:

V Fanti, A Lai, D Marras, L Musa, AJ Bevan, TJ Gershon, B Hay, RW Moore, KN Moore, DJ Munday, MD Needham, MA Parker, SF Takach, TO White, SA Wotton, G Barr, H Blumer, G Bocquet, J Bremer, A Ceccucci, J Cogan, D Cundy, N Doble, W Funk, L Gatignon, A Gianoli, A Gonidec, G Govi, P Grafstrom, G Kesseler, W Kubischta, A Lacourt, S Luitz, JP Matheys, A Norton, S Palestini, B Panzer-Steindel, B Peyaud, D Schinzel, H Taureg, M Velasco, O Vossnack, H Wahl, G Wirrer, A Gaponenko, V Kekelidze, D Madigojine, A Mestvirishvili, Y Potrebenikov, G Tatishvili, A Tkatchev, A Zinchenko, L Bertolotto, O Boyle, IG Knowles, VJ Martin, HLC Parsons, KJ Peach, C Talamonti, M Contalbrigo, P Dalpiaz, J Duclos, A Formica, PL Frabetti, M Martini, F Petrucci, M Savrie, A Bizzeti, M Calvetti, G Collazuol, G Graziani, E Iacopini, M Lenti, A Michetti, HG Becker, P Buchholz, D Coward, C Ebersberger, H Fox, A Kalter, K Kleinknecht, U Koch, L Kopke, B Renk, J Scheidt, J Schmidt, V Schonharting, Y Schue, R Wilhelm, M Wittgen, JC Chollet, S Crepe, L Fayard, L Iconomidou-Fayard, J Ocariz, G Unal, D Vattolo, I Wingerter-Seez, G Anzivino, F Bordacchini

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A 40 MHz-pipelined trigger for K-0 -> 2 pi(0) decays for the CERN NA48 experiment

NUCL INSTRUM METH A 419:2-3 (1998) 695-700

Authors:

G Fischer, C Avanzini, GD Barr, P Calafiura, M Cirilli, F Costantini, D Cundy, H Dibon, F Formenti, B Gorini, B Hallgren, W Iwanski, M Jeitler, P Kapusta, F Laico, G Laverriere, G Magazzu, M Markytan, I Mikulec, F Morsani, G Neuhofer, M Pernicka, GM Pierazzini, M Porcu, D Rizzi, F Rossi, M Sozzi, A Taurok, R Tripiccione, M Velasco, O Vossnack, H Wahl, M Ziolkowski

Abstract:

The "neutral" trigger system for the selection of K-o --> 2 pi(o) --> 4 gamma decays of the NA48 CP-violation experiment is described. The trigger system has been implemented in a 40 MHz "dead-time free" pipeline to allow large rate reduction and high-trigger efficiency. The trigger decision is based on the information from 13340 cells of the electro-magnetic calorimeter. Every 25 ns the energy, the centre of gravity, the kaon lifetime and the number of peaks in calorimeter projections are calculated in the trigger. The pipeline system is described and the performance of the trigger during the 1997 data-taking period is discussed. (C) 1998 Published by Elsevier Science B.V. All rights reserved.

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The NA48 LKr calorimeter digitizer electronics chain

NUCL INSTRUM METH A 419:2-3 (1998) 680-685

Authors:

B Hallgren, F Bal, G Barr, P Buchholz, A Ceccucci, F Formenti, W Funk, A Gianoli, Y Kozhevnikov, A Lacourt, G Laverriere, M Martini, A Papi, M Sozzi, JC Tarle, O Vossnack, H Wahl

Abstract:

The 13500 channels of the NA48 liquid-krypton electromagnetic calorimeter readout electronics were put into operation in 1997. The digitizer electronics employs a new gain switching technique that expands the dynamic range of a standard 10-bit ADC to 14 bits at 40 MHz sampling rate employing a custom-developed integrated circuit (KRYPTON). The KRYPTON has been fabricated in 1.2 mu m BiCMOS technology and was successfully developed together with industry on a short timescale. The performance and the experience from the first year of the operation of the liquid-krypton calorimeter electronics will also be briefly discussed. (C) 1998 Elsevier Science B.V. All rights reserved.

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Giles Barr

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The atmospheric neutrino flavor ratio from a 3.9 fiducial kiloton-year exposure of Soudan 2

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Abstract:

A measurement of the transverse polarization of Lambda-hyperons produced in inelastic pN-reactions at 450 GeV proton energy

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

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A 40 MHz-pipelined trigger for K-0 -> 2 pi(0) decays for the CERN NA48 experiment

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The NA48 LKr calorimeter digitizer electronics chain

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The atmospheric neutrino flavor ratio from a 3.9 fiducial kiloton-year exposure of Soudan 2

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Abstract:

A measurement of the transverse polarization of Lambda-hyperons produced in inelastic pN-reactions at 450 GeV proton energy

Authors:

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

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A 40 MHz-pipelined trigger for K-0 -> 2 pi(0) decays for the CERN NA48 experiment

Authors:

Abstract:

The NA48 LKr calorimeter digitizer electronics chain

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