Giles Barr: Publications

A measurement of the decay KL→π⁰γγ

Physics Letters B 284:3-4 (1992) 440-447

Authors:

GD Barr, P Buchholz, R Carosi, D Coward, D Cundy, N Doble, L Gatignon, P Grafström, R Hagelberg, HH Nelson, H Wahl, KJ Peach, H Blümer, R Heinz, K Kleinknecht, P Mayer, B Panzer, B Renk, H Rohrer, A Wagner, E Augé, D Fournier, L Iconomidou-Fayard, I Harrus, O Perdereau, AC Schaffer, L Serin, L Bertanza, A Bigi, P Calafiura, M Calvetti, R Casali, IG Mannelli, VM Marzulli, A Nappi, G Pierazzini, M Holder, A Kreutz, M Rost, R Werthenbach

Abstract:

The full data set of the experiment NA31 at CERN has been used to analyse the decay mode KL→π0γγ. A signal of 63 events has been observed with an estimated background of 6.0±1.7 events, corresponding to a branching ratio of (1.7±0.3)×10-6 consistent with our previous result based on partial statistics. The invariant mass spectrum of the two photons is found to be consistent with chiral perturbation theory, and the decay is dominated by the J = 0 two photon state. © 1992.

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Search for magnetic monopoles with the Soudan 2 detector

Physical Review D 46:11 (1992) 4846-4851

Authors:

JL Thron, WWM Allison, GJ Alner, I Ambats, DS Ayres, LJ Balka, GD Barr, WL Barrett, D Benjamin, PM Border, CB Brooks, JH Cobb, DJA Cockerill, H Courant, JW Dawson, DM Demuth, VW Edwards, B Ewen, TH Fields, C Garcia-Garcia, RH Giles, GL Giller, MC Goodman, RN Gray, SJ Heilig, N Hill, JH Hoftiezer, DJ Jankowski, K Johns, T Kafka, SMS Kasahara, J Kochocki, W Leeson, PJ Litchfield, NP Longley, FV Lopez, MJ Lowe, WA Mann, ML Marshak, EN May, D Maxam, L McMaster, RH Milburn, WH Miller, CP Minor, A Napier, WP Oliver, GF Pearce, DH Perkins, EA Peterson, LE Price, DM Roback, DB Rosen, K Ruddick, B Saitta, DJ Schmid, J Schlereth, J Schneps, PD Shield, MA Shupe, N Sundaralingam, MA Thomson, LM Tupper, G Villaume, SJ Werkema, N West, CA Woods

Abstract:

A search for grand unified theory magnetic monopoles making highly ionizing tracks in argon gas has been conducted using the Soudan 2 nucleon decay detector. This underground detector is a large fine-grained tracking calorimeter comprised of long drift tubes read out by proportional wires. No monopole candidates were observed in data taken over almost three years, yielding an upper flux limit of 8.7 × 10-15 cm-2s-1sr-1 for monopole velocities of >2×10-3. © 1992 The American Physical Society.

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A MEASUREMENT OF THE DECAY KL - PI-0-GAMMA-GAMMA

284 (1992) 440-447

Authors:

GD Barr, P Buchholz, R Carosi, D Coward, D Cundy, N Doble, L Gatignon, P Grafstrom, R Hagelberg, HN Nelson, H Wahl, KJ Peach, H Blumer, R Heinz, K Kleinknecht, P Mayer, B Panzer, B Renk, H Rohrer, A Wagner, E Auge, D Fournier, L Iconomidoufayard, I Harrus, O Perdereau, AC Schaffer, L Serin, L Bertanza, A Bigi, P Calafiura, M Calvetti, R Casali, IG Mannelli, VM Marzulli, A Nappi, G Pierazzini, M Holder, A Kreutz, M Rost, R Werthenbach

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First results from the Soudan 2 proton decay experiment

Journal of Physics G Nuclear and Particle Physics IOP Publishing 17:S (1991) s393

Authors:

PJ Litchfield, WWM Allison, GJ Alner, I Ambats, DS Ayres, L Balka, GD Barr, WL Barrett, D Benjamin, P Border, CB Brooks, JH Cobb, DJA Cockerill, H Courant, B Dahlin, J Dawson, VW Edwards, TH Fields, C Garcia-Garcia, RH Giles, MC Goodman, RN Gray, S Heppelmann, N Hill, DJ Jankowski, K Johns, T Kafka, SM Kasahara, J Kochocki, N Longley, F Lopez, M Lowe, WA Mann, ML Marshak, E May, L McMaster, R Milburn, WH Miller, A Napier, W Oliver, GF Pearce, DH Perkins, EA Peterson, LE Price, D Roback, D Rosen, K Ruddick, B Saitta, DJ Schmid, JL Schlereth, J Schneps, PD Shield, M Shupe, N Sundaralingam, MA Thomson, J Thron, LM Tupper, SJ Werkema, N West

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The observation of underground muons from the direction of Cygnus X-3 during the January 1991 radio flare

Physics Letters B 269:1-2 (1991) 220-226

Authors:

MA Thomson, JH Cobb, WWM Allison, GJ Alner, I Ambats, DS Ayres, LJ Balka, GD Barr, WL Barrett, D Benjamin, PM Border, CB Brooks, DJA Cockerill, H Courant, JW Dawson, VW Edwards, B Ewen, TH Fields, C Garcia-Garcia, RH Giles, GL Giller, MC Goodman, RN Gray, S Heppelmann, N Hill, JH Hoftiezer, DJ Jankowski, K Johns, T Joyce, T Kafka, SMS Kasahara, LM Kirby-Gallagher, J Kochocki, PJ Litchfield, NP Longley, FV Lopez, MJ Lowe, WA Mann, ML Marshak, EN May, L McMaster, R Milburn, WH Miller, CP Minor, A Napier, W Oliver, GF Pearce, DH Perkins, EA Peterson, LE Price, DM Roback, DB Rosen, K Ruddick, B Saitta, DJ Schmid, J Schlereth, J Schneps, PD Shield, MA Shupe, N Sundaralingam, JL Thron, JL Uretsky, SJ Werkema, N West, CA Woods

Abstract:

Muons recorded in the Soudan 2 underground nucleon decay detector from January 1989 to February 1991 have been examined for any correlation with the radio flares of Cygnus X-3 observed during this period. On two nearby days during the radio flare of January 1991 a total of 32 muons within 2.0° of the Cygnus X-3 direction were observed when 11.4 were expected. © 1991.

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Giles Barr

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A measurement of the decay KL→π⁰γγ

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Search for magnetic monopoles with the Soudan 2 detector

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A MEASUREMENT OF THE DECAY KL - PI-0-GAMMA-GAMMA

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First results from the Soudan 2 proton decay experiment

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The observation of underground muons from the direction of Cygnus X-3 during the January 1991 radio flare

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A measurement of the decay KL→π0γγ

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Abstract:

Search for magnetic monopoles with the Soudan 2 detector

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Abstract:

A MEASUREMENT OF THE DECAY KL - PI-0-GAMMA-GAMMA

Authors:

First results from the Soudan 2 proton decay experiment

Authors:

The observation of underground muons from the direction of Cygnus X-3 during the January 1991 radio flare

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Abstract:

A measurement of the decay KL→π⁰γγ