Giles Barr: Publications

Direct search for light gluinos

Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 446:2 (1999) 117-124

Authors:

V Fanti, A Lai, L Musa, D Marras, A Nappi, B Hay, RW Moore, KN Moore, DJ Munday, MD Needham, MA Parker, TO White, SA Wotton, J Andersen, G Barr, G Bocquet, J Bremer, A Ceccucci, D Cundy, N Doble, G Fischer, W Funk, L Gatignon, A Gianoli, A Gonidec, G Govi, P Grafström, W Kubischta, S Luitz, G Kesseler, JP Matheys, A Norton, S Palestini, B Panzer-Steindel, D Schinzel, H Taureg, M Velasco, O Vossnack, H Wahl, G Wirrer, V Kekelidze, A Mestvirishvili, I Potrebenikov, G Tatichvili, A Tkatchev, A Zinchenko, O Boyle, VJ Martin, IG Knowles, HLC Parsons, P Dalpiaz, J Duclos, PL Frabetti, M Martini, F Petrucci, M Porcu, M Savrie, A Bizzeti, M Calvetti, G Graziani, E Iacopini, M Lenti, A Michetti, HG Becker, H Blümer, P Buchholz, D Coward, C Ebersberger, H Fox, A Kalter, K Kleinknecht, U Koch, L Köpke, B Renk, J Scheidt, J Schmidt, V Schönharting, I Schue, R Wilhelm, A Winharting, M Wittgen, JC Chollet, S Crépé, L Iconomidou-Fayard, L Fayard, J Ocariz, G Unal, D Vattolo, I Wingerter, G Anzivino, P Cenci, P Lubrano, M Pepe, B Gorini, P Calafiura, R Carosi, C Cerri, M Cirilli, F Costantini, R Fantechi

Abstract:

We present the results for a direct search for light gluinos through the appearance of η→3π0 with high transverse momentum in the vacuum tank of the NA48 experiment at CERN. We find one event within a lifetime range of 10-9-10-3 s and another one between 10-10-10-9 s. Both events are consistent with the expected background from neutrons in the beam, produced by 450 GeV protons impinging on the Be targets, which interact with the residual air in the tank. From these data we give limits on the production of the hypothetical gg̃ bound state, the R0 hadron, and its R0→ηγ + ̃ decay in the R0 mass range between 1 and 5 GeV. © 1999 Elsevier Science B.V. All rights reserved.

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Measurement of the decay rate and form factor parameter αK* in the decay KL → e⁺e^-γ

Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 458:4 (1999) 553-563

Authors:

V Fanti, A Lai, L Musa, D Marras, A Nappi, B Hay, RW Moore, KN Moore, DJ Munday, MD Needham, MA Parker, TO White, SA Wotton, G Barr, G Bocquet, J Bremer, A Ceccucci, D Cundy, N Doble, W Funk, L Gatignon, A Gianoli, A Gonidec, G Govi, P Grafström, W Kubischta, A Lacourt, S Luitz, G Kesseler, JP Matheys, A Norton, S Palestini, B Panzer-Steindel, D Schinzel, H Taureg, M Velasco, O Vossnack, H Wahl, G Wirrer, V Kekelidze, A Mestvirishvili, G Tatishvili, I Potrebenikov, A Tkatchev, A Zinchenko, O Boyle, VJ Martin, IG Knowles, HLC Parsons, P Dalpiaz, J Duclos, PL Frabetti, M Martini, F Petrucci, M Porcu, M Savrié, A Bizzeti, M Calvetti, G Collazuol, G Graziani, E Iacopini, M Lenti, A Michetti, HG Becker, H Blümer, P Buchholz, D Coward, C Ebersberger, H Fox, A Kalter, K Kleinknecht, U Koch, L Köpke, B Renk, J Scheidt, J Schmidt, V Schönharting, Y Schué, R Wilhelm, A Winhart, M Wittgen, JC Chollet, S Crépé, L Iconomidou-Fayard, L Fayard, J Ocariz, G Unal, D Vattolo, I Wingerter, G Anzivino, P Cenci, P Lubrano, M Pepe, B Gorini, P Calafiura, R Carosi, C Cerri, M Cirilli, F Costantini, R Fantechi

Abstract:

The decay rate of the neutral K meson KL → e+e-γ has been measured with the NA48 detector at the CERN SPS. A total of 6864 events has been observed with an estimated background of 10 events. The branching ratio is Γ(KL → e+e-γ)/Γ(KL → all) = (1.06 ± 0.02stat ± 0.02sys ± 0.04calc) × 10-5 The parameter αK* describing the relative strength of the two contributing amplitudes to this decay through intermediate pseudoscalar or vector mesons was measured to be αK* = -0.36 ± 0.06stat ± 0.02sys. © 1999 Published by Elsevier Science B.V. All rights reserved.

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The NA48 LKr calorimeter readout electronics

Institute of Electrical and Electronics Engineers (IEEE) (1999) 110-115

Authors:

A Gianoli, F Bal, G Barr, P Brodier-Youstone, P Buchholz, A Ceccucci, C Cerri, A Chlopik, F Costantini, R Fantechi, E Formenti, W Funk, S Giudici, B Gorini, Z Guzik, B Hallgren, Y Kozhevnikov, W Iwansky, C de la Taille, A Lacourt, G Laverriere, C Ljuslin, L Mannelli, G Martin-Chassa, M Martini, A Papi, N Seguin-Moseau, M Sozzi, JC Tarle, M Velasco, O Vossnack, H Wahl, M Ziolkowsky

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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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Giles Barr

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Direct search for light gluinos

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Measurement of the decay rate and form factor parameter αK* in the decay KL → e⁺e^-γ

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Abstract:

The NA48 LKr calorimeter readout electronics

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

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

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Direct search for light gluinos

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Abstract:

Measurement of the decay rate and form factor parameter αK* in the decay KL → e+e-γ

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Abstract:

The NA48 LKr calorimeter readout electronics

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

Authors:

Abstract:

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

Authors:

Measurement of the decay rate and form factor parameter αK* in the decay KL → e⁺e^-γ