Giles Barr: Publications

Measurement of the decay rate and the parameter αK* of the decay KL → μμγ

Zeitschrift fur Physik C-Particles and Fields 76:4 (1997) 653-657

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 Panzer-Steindel, H Taureg, M Velasco, O Vossnack, H Wahl, 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 Simani, 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, 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, I Mannelli, G Pierazzini, M Sozzi

Abstract:

The rate of the decay of the neutral K meson into KL0 → μμγ has been measured with the NA48 detector at the CERN SPS. A total of 59 events has been observed with an estimated background of 14 events. The overall Kaon flux was determined to be 1.2 × 109. This observation corresponds to a branching ratio of (3.4 ± 0.6stat ± 0.4sys) × 10-7. Using this branching ratio the parameter αK* describing the relative strength of the two contributing amplitudes to this decay, through intermediate pseudoscalar or vector-like mesons, was measured to be αK*= -0.04-0.21+0.24. © Springer-Verlag 1997.

More details from the publisher

Measurement of the K-S mean lifetime from pi(+)pi(-) and pi(0)pi(0) decays using K-L decays to determine the acceptance

73 (1997) 629-632

Authors:

L Bertanza, A Bigi, P Calafiura, M Calvetti, R Carosi, MC Carrozza, R Casali, C Cerri, R Fantechi, I Mannelli, VM Marzulli, A Nappi, GM Pierazzini, L Tassi, GD Barr, P Buchholz, D Coward, D Cundy, N Doble, L Gatignon, P Grafstrom, R Hagelberg, H Wahl, KJ Peach, T Beier, H Blumer, R Heinz, K Kleinknecht, B PanzerSteindel, B Renk, H Rohrer, J Scheidt, J Staeck, A Wagner, E Auge, D Fournier, L IconomidouFayard, O Perdereau, AC Schaffer, L Serin, M Holder, A Kreutz, R Werthenbach

More details from the publisher

Measurement of the decay rate and the parameter alpha(K)* of the decay K-L ->mu mu gamma

76 (1997) 653-657

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 Panzer-Steindel, H Taureg, M Velasco, O Vossnack, H Wahl, 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 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, 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, I Mannelli, G Pierazzini, M Sozzi

More details from the publisher

A fully software-programmable pipelined trigger-processing module

IEEE Transactions on Nuclear Science 43:3 PART 2 (1996) 1689-1694

Authors:

GD Barr, F Formenti, W Iwanski, P Kapusta, H Wahl, M Ziolkowski

Abstract:

We describe a general purpose 40MHz pipelined trigger processing board containing six look-up tables and the logic needed to programmably route the signals between them. A series of identical boards are connected in cascade in the NA48 CP-violation experiment at CERN, accept digital inputs generated from calorimeter signals and are used to perform the different computations necessary for the trigger reconstruction. The board architecture is designed to be flexible so that a single basic hardware design can perform all the different algorithms we require and so that the trigger algorithms can be adapted if needed. The computation latency of the combined network of eight boards is approximately 3μs. We present examples of some of the functions which have been implemented. We discuss the automatic reprogramming software which has been developed so that a new design can be implemented easily. © 1996 IEEE.

More details from the publisher

High rate large dynamic range analog circuitry and digitizers for fast calorimetry

IEEE Transactions on Nuclear Science 43:3 PART 2 (1996) 1605-1609

Authors:

B Hallgren, F Bal, GD Barr, P Buchholz, F Formenti, W Funk, Y Kozhevnikov, A Lacourt, G Laverrière, M Martini, A Papi, P Ponting, M Sozzi, O Vossnack, H Wahl

Abstract:

This paper describes the issues encountered in the design of a large dynamic range digitizer for calorimetry. A gain switching technology developed for the liquid krypton calorimeter of the NA48 CP-violation experiment at CERN is described in detail. 14 bit dynamic range and better than 300 ps time resolution were achieved in beam tests with an 8 channel prototype. A mixed analog/digital ASIC has been developed. A 13'500 channel system is being produced which will be put into operation in 1996. © 1996 IEEE.

More details from the publisher

Giles Barr

Sub department

Measurement of the decay rate and the parameter αK* of the decay KL → μμγ

Authors:

Abstract:

Measurement of the K-S mean lifetime from pi(+)pi(-) and pi(0)pi(0) decays using K-L decays to determine the acceptance

Authors:

Measurement of the decay rate and the parameter alpha(K)* of the decay K-L ->mu mu gamma

Authors:

A fully software-programmable pipelined trigger-processing module

Authors:

Abstract:

High rate large dynamic range analog circuitry and digitizers for fast calorimetry

Authors:

Abstract:

FIND US

CONTACT US

Giles Barr

Sub department

Research groups

Measurement of the decay rate and the parameter αK* of the decay KL → μμγ

Authors:

Abstract:

Measurement of the K-S mean lifetime from pi(+)pi(-) and pi(0)pi(0) decays using K-L decays to determine the acceptance

Authors:

Measurement of the decay rate and the parameter alpha(K)* of the decay K-L ->mu mu gamma

Authors:

A fully software-programmable pipelined trigger-processing module

Authors:

Abstract:

High rate large dynamic range analog circuitry and digitizers for fast calorimetry

Authors:

Abstract: