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5 results on '"J.P. Matheys"'

1. First measurement of the rate K0L → πμνγ

Author

C Siman, J.P. Matheys, R. Wilhelm, G.D. Barr, Julien Cogan, B. Panzer-Steindel, Sandro Palestini, R. Turlay, Michael Ziolkowski, J.B. Cheze, P. Lubrano, V. Fanti, U. Koch, W. Kubischta, A. Michetti, M. Calvetti, C. Cerri, D. J. Munday, J. Scheidt, R. Fantechi, P. F. Dalpiaz, B. Vallage, M. Bender, J. C. Chollet, Cinzia Talamonti, Augusto Ceccucci, P.L. Frabetti, P Maas, S. Schanne, Paolo Calafiura, H.G. Becker, S. Giudici, H. Dibon, O. Boyle, A. Gianoli, R. Casali, P. Hristov, T. O. White, H. Parsons, R. Carosi, A. Lai, M. Martini, Alan W. Walker, Andrea Formica, S. Crépé, M. Pepe, Cristina Biino, Ivan Mikulec, L. Bertolotto, F Rossi, B. Peyaud, Benedetto Gorini, D. Schinzel, L. Köpke, H. Blümer, G. Pierazzini, P. Buchholz, M. Savrie, M. Sozzi, E. Menichetti, I Schwarze, Lau Gatignon, Mayda Velasco, G. Tatichvili, H. Taureg, Manfred Jeitler, M.G Setzu, M. De Beer, G Fischer, A. Tkatchev, G Oakland, D. Coward, F. Costantini, T Beier, Louis Fayard, F. Marchetto, Niels Doble, I Kojevnikov, A. Norton, Konrad Kleinknecht, P. Cenci, L. Musa, J. Duclos, Fabrizio Petrucci, G. Anzivino, Aniello Nappi, J. Schmidt, A. Kalter, P. Grafström, G. Unal, I. Potrebenikov, Vladimir Kekelidze, G. Govi, J. Bremer, Anton Taurok, Andrea Bizzeti, P. Debu, Lydia Iconomidou-Fayard, E. Mazzucato, M. Porcu, Roberta Arcidiacono, I. Augustin, V. Marzulli, S.F Takach, A. Gonidec, M. Holder, M. Pernicka, C. Ebersberger, R.W. Moore, Ken Peach, B Hay, M. Markytan, M. Lenti, O. Zeitnitz, F. Leber, O. Steinkamp, G. Kesseler, N.E Mc Kay, G. Neuhofer, Wolfgang Funk, D.C. Cundy, J. Ocariz, B. Renk, O. Vossnack, I. Mannelli, S. Luitz, G. Bocquet, Michael Andrew Parker, and V. Schönharting

Subjects
Physics, Nuclear physics, Nuclear and High Energy Physics, Large Hadron Collider, Branching fraction, Photon detector, NA48 experiment, Calorimeter
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 K L → πμνγ and K L → πμν decays was measured. The branching ratio BR(K L →πμνγ, E γ ∗ ≥30 MeV )/(K L → 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.

Published
2016

2. Investigation of $K_\mathrm{L,S} \rightarrow \pi^+ \pi^{-} e^+ e^{-}$ decays

Author

Benedetto Gorini, J.P. Matheys, Manfred Jeitler, Victoria Jane Martin, M. De Beer, J. Duclos, G. Anzivino, Michael Ziolkowski, T. Cuhadar-Dönszelmann, G. Kalmus, H.G. Becker, Mayda Velasco, Cristina Biino, Ivan Mikulec, M. Wittgen, I. Augustin, Vladimir Kekelidze, G. Neuhofer, E. Iacopini, M. Pernicka, M. Veltri, M. Contalbrigo, A. Winhart, P. Grafström, M. Cirilli, O. Vossnack, Wolfgang Funk, Mauro Piccini, R. Carosi, T.J. Gershon, D.C. Cundy, A. Gaponenko, A. Hirstius, Paolo Calafiura, A. Norton, A. I. Zinchenko, S. Luitz, A. Lai, Nadia Pastrone, M. Sozzi, Augusto Ceccucci, A. Gianoli, K. Holtz, I. Mannelli, J.B. Cheze, R. Granier de Cassagnac, Michal Szleper, Roberto Guida, Y. Schué, R. Casali, R. Fantechi, B. Hay, L. Köpke, Frederic Derue, D. Coward, D. Marras, M. Savrie, Cristina Lazzeroni, G. Fischer, A. Peters, Milene Calvetti, H. D. Wahl, E. Menichetti, D. Schinzel, C. Cheshkov, G.D. Barr, G. Unal, Michael Bender, A. Kalter, M. Martini, J. Nassalski, U. Koch, A. Nappi, Anton Taurok, H. Bluemer, Louis Fayard, F. Marchetto, S. A. Wotton, R.S. Dosanjh, Roberta Arcidiacono, P. Lopes da Silva, H. Taureg, Lydia Iconomidou-Fayard, A L Tkachev, P. Marouelli, H. Dibon, L. Bertanza, R. Turlay, L. Widhalm, G. Tatishvili, M. Markytan, Niels Doble, Adrian John Bevan, M. Lenti, E. Rondio, A. Bigi, B. Peyaud, Lau Gatignon, G. Graziani, R. Sacco, J.-C. Chollet, Andrea Bizzeti, I. Wingerter-Seez, G. Pierazzini, V. Falaleev, P Z Khristov, I.G. Knowles, W. Wislicki, E. Mazzucato, G. Govi, P. Cenci, S. Giudici, W. Kubischta, S. Wronka, P. Lubrano, P. Debu, S.A. Schmidt, M. Scarpa, D. J. Munday, E. Imbergamo, Alexi Mestvirishvili, J. Ocariz, J. G. Cogan, F. Martelli, M. Holder, M. Pepe, G. D'Agostini, D. Madigojine, Konrad Kleinknecht, I. Pellmann, F. Costantini, G. Bocquet, Yu. Potrebenikov, A. Gonidec, G. Collazuol, A. Maier, Matthew Needham, M. Eppard, Nicolo Cartiglia, Michael Andrew Parker, Rainer Wanke, P. F. Dalpiaz, V. Schönharting, B. Vallage, Jacqueline Batley, C. Cerri, E. Olaiya, H. Fox, A. Lacourt, B. Panzer-Steindel, Fabrizio Petrucci, P.L. Frabetti, T. O. White, H. Parsons, Alan W. Walker, Sandro Palestini, A. Formica, and N. A. Molokanova

Subjects
Nuclear physics, Physics, Particle physics, Angular distribution, Large Hadron Collider, Physics and Astronomy (miscellaneous), Angular correlation, Charge radius, Pi, NA48 experiment, Engineering (miscellaneous)
Published
2003

3. Measurement of the decay rate and form factor parameter in the decay KL→e+e−γ

Author

H.G. Becker, Cristina Biino, Ivan Mikulec, Vladimir Kekelidze, R. Turlay, M. Holder, D. Marras, G. Fischer, A. Gonidec, A. I. Zinchenko, Michael Ziolkowski, S. Luitz, I. Potrebenikov, Anton Taurok, G. Collazuol, M. Sozzi, S. A. Wotton, E. Iacopini, G. Govi, Konrad Kleinknecht, S. Schanne, A. Gianoli, Paolo Calafiura, Matthew Needham, B. Vallage, P. Grafström, R.W. Moore, I. Mannelli, J. Nassalski, R. Granier de Cassagnac, A. Lai, Andrea Formica, G. Kesseler, J.B. Cheze, M. Cirilli, Niels Doble, W. Kubischta, Michal Szleper, O. Boyle, P. F. Dalpiaz, A. Nappi, P. Hristov, P. Lubrano, P. Debu, R. Fantechi, H. D. Wahl, Giacomo Graziani, A. Mestvirishvili, M. Savrie, U. Koch, A. Winhart, Louis Fayard, G. Neuhofer, F. Marchetto, J. C. Chollet, F. Costantini, D. J. Munday, Milene Calvetti, H. Blümer, L. Köpke, M. Bender, I.G. Knowles, P. Buchholz, E. Menichetti, A. Kalter, B. Peyaud, M. Martini, Lydia Iconomidou-Fayard, D. Schinzel, J. Scheidt, B. Hay, Victoria Jane Martin, W. Wislicki, Michael Andrew Parker, S. Giudici, M. De Beer, E. Rondio, H. Dibon, J. Ocariz, Roberta Arcidiacono, G.D. Barr, H. Taureg, B. Renk, Augusto Ceccucci, S. Wronka, Mayda Velasco, V. Fanti, I. Wingerter, V. Schönharting, G. Tatishvili, O. Vossnack, Lau Gatignon, Benedetto Gorini, G. Unal, M. Porcu, A. Tkatchev, M. Pepe, D. Coward, Manfred Jeitler, J.P. Matheys, C. Cerri, J. Schmidt, Luciano Musa, G. Bocquet, I. Augustin, K.N. Moore, J. Duclos, Andrea Bizzeti, P. Cenci, J. Bremer, G. Anzivino, A. Norton, M. Pernicka, C. Ebersberger, G. Wirrer, D. Vattolo, S. Crépé, E. Mazzucato, M. Markytan, M. Lenti, H. Fox, A. Lacourt, R. Wilhelm, B. Panzer-Steindel, Fabrizio Petrucci, P.L. Frabetti, T. O. White, H. Parsons, Sandro Palestini, A. Michetti, Wolfgang Funk, R. Carosi, D.C. Cundy, Y. Schué, G.M. Pierazzini, M. Wittgen, and J. Cogan

Subjects
Pseudoscalar, Physics, Nuclear physics, Nuclear and High Energy Physics, Amplitude, Meson, Branching fraction, Form factor (quantum field theory), Alpha (ethology), Relative strength
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 α K ∗ describing the relative strength of the two contributing amplitudes to this decay through intermediate pseudoscalar or vector mesons was measured to be α K ∗ =−0.36±0.06stat±0.02sys.

Published
1999

4. Measurement of the quadratic slope parameter in the K-L -> 3 pi(0) decay Dalitz plot

Author

G. Fischer, Milene Calvetti, G. Govi, W. Kubischta, P. Lubrano, H. Dibon, Nadia Pastrone, D. J. Munday, S.A. Schmidt, M. Markytan, M. Eppard, B. Vallage, P.L. Frabetti, E. Imbergamo, M. Lenti, J. Ocariz, G. Pierazzini, I.G. Knowles, T. O. White, D. Madigojine, H. Parsons, Alan W. Walker, C. Cerri, H. Blümer, Giacomo Graziani, A. Peters, P. F. Dalpiaz, M. Pepe, S. Giudici, M. Wittgen, I. Wingerter, S. Wronka, G. D'Agostini, E. Olaiya, H. Fox, Victoria Jane Martin, J. Cogan, R.S. Dosanjh, N. A. Molokanova, K. Holtz, Peter Zahariev Hristov, E. Iacopini, U. Koch, R. Sacco, Louis Fayard, F. Marchetto, A. Lacourt, G.D. Barr, P. Debu, Mayda Velasco, Rainer Wanke, P. Grafström, J.P. Matheys, Sandro Palestini, W. Wislicki, M. Martini, I. Pellmann, J. Nassalski, Vladimir Kekelidze, G. Tatishvili, A. Nappi, A. I. Zinchenko, C. Cheshkov, M. Sozzi, A. Gianoli, F. Costantini, C. Lazzeroni, A. Gonidec, D. Marras, Konrad Kleinknecht, R. Granier de Cassagnac, R. Casali, B. Hay, Augusto Ceccucci, G. Collazuol, Matthew Needham, B. Panzer-Steindel, A. Winhart, S. A. Wotton, G. Kalmus, H.G. Becker, Benedetto Gorini, Mauro Piccini, Lydia Iconomidou-Fayard, Niels Doble, J.-C. Chollet, Cristina Biino, Ivan Mikulec, H. Taureg, V. Falaleev, Manfred Jeitler, E. Mazzucato, M. Bender, J. Duclos, G. Anzivino, G. Neuhofer, S. Luitz, R. Carosi, A. Lai, D.C. Cundy, Andrea Formica, Luciano Musa, Y. Schué, A. Norton, Andrea Bizzeti, H. D. Wahl, B. Peyaud, Michael Andrew Parker, Michael Ziolkowski, G. Unal, E. Rondio, V. Schönharting, I. Augustin, Anton Taurok, M. Holder, M. Cirilli, A. Mestvirishvili, M. Savrie, G. Bocquet, Yu. Potrebenikov, M. Pernicka, S. Crépé, Adrian John Bevan, R. Turlay, M. De Beer, Michal Szleper, E. Menichetti, T.J. Gershon, B. Renk, I. Mannelli, J.B. Cheze, F. Petrucci, M. Contalbrigo, L. Köpke, Lau Gatignon, P. Cenci, A. Kalter, Roberta Arcidiacono, and R. Fantechi

Subjects
Physics, neutral kaon, Particle physics, Nuclear and High Energy Physics, Large Hadron Collider, mesoni K, decadimenti, Dalitz plot, kaon decay, dalitz plot, slope parameters, NA48 experiment, Value (computer science), Kaons, High Energy Physics - Experiment, Classical mechanics, Quadratic equation, 3-PI%22">K->3-PI
Abstract

A value of (-6.1 +- 0.9_{stat} +- 0.5_{syst})*10^{-3} is obtained for the quadratic slope parameter h in the K_L -> 3\pi^0 decay Dalitz plot at the NA48 experiment at the CERN SPS. The result is based on 14.7*10^6 fully reconstructed K_L -> 3\pi^0 -> 6\gamma decays. This is the most precise measurement of any of the Dalitz plot slope parameters in the charged and neutral kaon decays so far., Comment: 13 pages, 3 figures, 2 tables

Published
2001

5. The NA48 data acquisition system

Author

B. Panzer-Steindel, S.B. Galagedera, J.P. Matheys, P. Brodier-Yourstone, F. Bal, A. Lacourt, H. Parsons, Ken Peach, M. Wittgen, S. Luitiz, N. Mckay, G. Wirrer, O. Boyle, B. Segal, and A. Gianoli

Subjects
Physics, Nuclear and High Energy Physics, Large Hadron Collider, business.industry, Real-time computing, Volume (computing), Particle accelerator, Modular design, Particle detector, law.invention, Data acquisition, Nuclear Energy and Engineering, law, Nuclear electronics, Electronic engineering, CP violation, Electrical and Electronic Engineering, Detectors and Experimental Techniques, business
Abstract

NA48 is a CP violation experiment that is starting its period of data taking at the CERN SPS accelerator. The expected average data rate of a few thousand events/s (with the possibility to go up to 10 kHz), a data volume up to 100 MB/s sustained over the beam burst, and the necessity to handle different subsystems with very wide variation in the number of channels have lead to the design of a modular pipelined data acquisition system with a sampling rate of 25 ns.

Published
1998

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