Giles Barr: Publications

Search for the proton decay mode p → ν K+ in Soudan 2

Physics Letters Section B Nuclear Elementary Particle and High Energy Physics 427:1-2 (1998) 217-224

Authors:

WWM Allison, GJ Alner, DS Ayres, G Barr, WL Barrett, C Bode, PM Border, CB Brooks, JH Cobb, R 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, J Schneps, MH Schub, R Seidlein, A Stassinakis, H Tom, JL Thron, V Vassiliev, G Villaume, S Wakeley, D Wall, N West, UM Wielgosz

Abstract:

We have searched for the proton decay mode p → ν K⁺ using the one-kiloton Soudan 2 high resolution calorimeter. Contained events obtained from a 3.56 kiloton-year fiducial exposure through June 1997 are examined for occurrence of a visible K⁺ track which decays at rest into μ⁺ ν or π⁺ π⁰. We found one candidate event consistent with background, yielding a limit, τ/B(p → ν K⁺) > 4.3 × 10³¹ years at 90% CL with no background subtraction. © 1998 Published by Elsevier Science B.V. All rights reserved.

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Measurement of the decay KL → e+e-γγ

Physics Letters Section B Nuclear Elementary Particle and High Energy Physics 420:1-2 (1998) 205-210

Authors:

MG Setzu, A Nappi, A Beisser, T Beier, H Blümer, P Buchholz, D Coward, K Kleinknecht, F Leber, B Renk, H Rohrer, HG Sander, F Scheerer, J Scheidt, J Staeck, A Wagner, GD Barr, D Cundy, N Doble, L Gatignon, P Grafström, R Hagelberg, H Wahl, KJ Peach, E Augé, D Fournier, L Iconomidou-Fayard, O Perdereau, AC Schaffer, L Serin, L Bertanza, A Bigi, P Calafiura, M Calvetti, R Carosi, R Casali, R Fantechi, I Mannelli, VM Marzulli, GM Pierazzini, M Holder, A Kreutz, R Werthenbach

Abstract:

The full data set of the NA31 experiment at CERN has been used to analyse the decay mode K^OL → e⁺ e^-γγ. A signal of 47 events has been observed with an estimated background of 6.9 events. The total number of kaon decays in the decay volume was determined to be (2.1 ± 0.1stat) · 10⁹. This corresponds to a branching ratio of (8.0 ± 1.5^+1.4-1.2)· 10^-7. © 1998 Published by Elsevier Science B.V.

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First measurement of the rate K⁰L → πμνγ

Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 418:3-4 (1998) 411-418

Authors:

M Bender, I Augustin, M Holder, I Schwarze, M Ziolkowski, 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 Panzer-Steindel, D Schinzel, H Taureg, M Velasco, O Vossnack, V Kekelidze, I Kojevnikov, I Potrebenikov, G Tatichvili, A Tkatchev, L Bertolotto, O Boyle, B Hay, NE Mc Kay, 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 Siman, A Bizzeti, M Calvetti, M Lenti, A Michetti, HG Becker, T Beier, H Blümer, P Buchholz, D Coward, C Ebersberger, A Kalter, K Kleinknecht, U Koch, L Köpke, F Leber, S Luitz, B Renk, J Scheidt, J Schmidt, V Schönharting, R Wilhelm, O Zeitnitz, JC Chollet, S Crépé, 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

Abstract:

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 KL → πμνγ and KL → πμν decays was measured. The branching ratio BR(KL → πμνγ,E*γ ≥30 MeV)/(KL → πμν) is found to be (2.08 ± 0.17+0.16-0.21) × 10-3, where the first error is statistical and the second systematic. The result is in agreement with theoretical predictions. © 1998 Elsevier Science B.V.

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First measurement of the rate K-L(0)->pi mu nu gamma

418 (1998) 411-418

Authors:

M Bender, I Augustin, M Holder, I Schwarze, M Ziolkowski, 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 Panzer-Steindel, D Schinzel, H Taureg, M Velasco, O Vossnack, V Kekelidze, I Kojevnikov, I Potrebenikov, G Tatichvili, A Tkatchev, L Bertolotto, O Boyle, B Hay, NE Mc Kay, 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 Siman, 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 Kipke, 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

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Measurement of the decay K-L -> e(+)e(-)gamma gamma

420 (1998) 205-210

Authors:

MG Setzu, A Nappi, A Beisser, T Beier, H Blumer, P Buchholz, D Coward, K Kleinknecht, F Leber, B Renk, H Rohrer, HG Sander, F Scheerer, J Scheidt, J Staeck, A Wagner, GD Barr, D Cundy, N Doble, L Gatignon, P Grafstrom, R Hagelberg, H Wahl, KJ Peach, E Auge, D Fournier, L Iconomidou-Fayard, O Perdereau, AC Schaffer, L Serin, L Bertanza, A Bigi, P Calafiura, M Calvetti, R Carosi, R Casali, R Fantechi, I Mannelli, VM Marzulli, GM Pierazzini, M Holder, A Kreutz, R Werthenbach

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Search for the proton decay mode p → ν K+ in Soudan 2

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Measurement of the decay KL → e+e-γγ

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First measurement of the rate K⁰L → πμνγ

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First measurement of the rate K-L(0)->pi mu nu gamma

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Measurement of the decay K-L -> e(+)e(-)gamma gamma

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Search for the proton decay mode p → ν K+ in Soudan 2

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Measurement of the decay KL → e+e-γγ

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First measurement of the rate K0L → πμνγ

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First measurement of the rate K-L(0)->pi mu nu gamma

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Measurement of the decay K-L -> e(+)e(-)gamma gamma

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First measurement of the rate K⁰L → πμνγ