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126 results on '"R. Turlay"'

1. Neutrino and Antineutrino Charged-Current Inclusive Scattering in Iron in the Energy Range 20<Ev<300 GeV

Author

H. Abramowicz, J.G.H. de Groot, J. Knobloch, J. May, P. Palazzi, A. Para, F. Ranjard, A. Savoy-Navarro, D. Schlatter, J. Steinberger, H. Taureg, W. von Rüden, H. Wahl, J. Wotschack, P. Buchholz, F. Eisele, H.P. Klasen, K. Kleinknecht, H. Lierl, D. Pollmann, B. Pszola, B. Renk, H.J. Willutzki, F. Dydak, T. Flottmann, C. Geweniger, J. Królikowski, K. Tittel, P. Bloch, B. Devaux, C. Guyot, J.P. Merlo, B. Peyaud, J. Rander, J. Rothberg, R. Turlay, J.T. He, T.Z. Ruan, and W.M. Wu

Published
2022

2. Inclusive Interactions of High-Energy Neutrinos and Antineutrinos in Iron

Author

J. G. H. de Groot, T. Hansl, M. Holder, J. Knobloch, J. May, H. P. Paar, P. Palazzi, A. Para, F. Ranjard, D. Schlatter, J. Steinberger, H. Suter, W. von Rüden, H. Wahl, S. Whitaker, E. G. H. Williams, F. Eisele, K. Kleinknecht, H. Lierl, G. Spahn, H. J. Willutzki, W. Dorth, F. Dydak, C. Geweniger, V. Hepp, K. Tittel, J. Wotschack, P. Bloch, B. Devaux, S. Loucatos, J. Maillard, J. P. Merlo, B. Peyaud, J. Rander, A. Savoy-Navarro, R. Turlay, and F. L. Navarria

Published
2022

3. QCD ANALYSIS OF CHARGED-CURRENT STRUCTURE FUNCTIONS

Author

J.G.H. de GROOT, T. HANSL, M. HOLDER, J. KNOBLOCH, J. MAY, H.P. PAAR, P. PALAZZI, A. PARA, F. RANJARD, D. SCHLATTER, J. STEINBERGER, H. SUTER, W. von RÜDEN, H. WAHL, S. WHITAKER, E.G.H. WILLIAMS, F. EISELE, K. KLEINKNECHT, H. LIERL, G. SPAHN, H.J. WILLUTZKI, W. DORTH, F. DYDAK, C. GEWENIGER, V. HEPP, K. TITTEL, J. WOTSCHACK, P. BLOCH, B. DEVAUX, S. LOUCATOS, J. MAILLARD, J.P. MERLO, B. PEYAUD, J. RANDER, A. SAVOY-NAVARRO, R. TURLAY, and F.L. NAVARRIA

Published
2022

4. Determination of the Gluon Distribution in the Nucleon from Deep Inelastic Neutrino Scattering

Author

Claude Guyot, A. Para, T. Ruan, C. Geweniger, P. Palazzi, K. Tittel, J. Knobloch, H. Taureg, W. Wu, B. Renk, F. Ranjard, J. Steinberger, B. Pszola, Konrad Kleinknecht, F. Eisele, J. De Groot, Jp Schuller, H. P. Klasen, J. Królikowski, T. Flottmann, J. May, J. He, John Rander, R. Turlay, H. J. Willutzki, H. D. Wahl, F. Dydak, Halina Abramowicz, B. Peyaud, J. Rothberg, J. Duda, Jorg Wotschack, D. Schlatter, W. von Rüden, and Jean-Pierre Merlo

Subjects
Physics, Quantum chromodynamics, Particle physics, Physics and Astronomy (miscellaneous), Bar (music), High Energy Physics::Lattice, High Energy Physics::Phenomenology, Structure (category theory), Perturbative QCD, Gluon, Nuclear physics, Distribution (mathematics), High Energy Physics::Experiment, Nucleon, Engineering (miscellaneous), Scaling, Particle Physics - Phenomenology
Abstract

The observed scaling violations of the nucleon structure functionF 2 and $$\bar q$$ have been analysed in the framework of perturbative QCD to determine the shape and magnitude of the gluon distribution. The data are in good agreement with leading order QCD, and the simultaneous use ofF 2 and $$\bar q$$ structure functions permits, for the first time, a reliable determination of the gluon structure function.

Published
2022

5. Search for the decay KS → π0γγ

Author

R.S. Dosanjh, M. Wittgen, J. Cogan, M. De Beer, T.J. Gershon, H. D. Wahl, G. Govi, W. Kubischta, E. Rondio, T. Cuhadar-Dönszelmann, Peter Zahariev Hristov, Anton Taurok, K. Holtz, Rainer Wanke, B. Peyaud, C. Cheshkov, N. A. Molokanova, M. Markytan, M. Lenti, D. J. Munday, Vladimir Kekelidze, G. Graziani, G. Neuhofer, A. Nappi, Lau Gatignon, A. Tkatchev, Nadia Pastrone, J.-C. Chollet, P. F. Dalpiaz, B. Panzer-Steindel, P. Cenci, E. Iacopini, P. Grafström, R. Turlay, I.G. Knowles, Konrad Kleinknecht, V. Falaleev, S. Giudici, I. Mannelli, D.C. Cundy, M. Contalbrigo, M. Pepe, S. Wronka, Y. Schué, B. Vallage, Benedetto Gorini, D. Marras, R. Fantechi, A. Maier, M. Eppard, G. Fischer, Milene Calvetti, L. Köpke, D. Madigojine, U. Koch, Manfred Jeitler, C. Cerri, R. Carosi, A. Lai, Andrea Formica, A. Winhart, A. Peters, Nicolo Cartiglia, A. Kalter, S. A. Wotton, Michael Andrew Parker, P.L. Frabetti, Louis Fayard, Mauro Piccini, F. Marchetto, A. Norton, J. Duclos, H. Dibon, Michal Szleper, Niels Doble, E. Olaiya, I. Pellmann, G. Unal, H. Fox, G. Anzivino, P. Debu, L. Widhalm, F. Costantini, E. Mazzucato, Roberta Arcidiacono, M. Sozzi, R. Sacco, B. Renk, A. Lacourt, Augusto Ceccucci, G. Pierazzini, J. Nassalski, T. O. White, W. Wislicki, V. Schönharting, M. Pernicka, Alan W. Walker, P. Lopes da Silva, L. Masetti, Sandro Palestini, A. Gonidec, A. I. Zinchenko, Lydia Iconomidou-Fayard, M. Holder, P. Marouelli, M. Cirilli, G. Collazuol, F. Petrucci, A. Gianoli, M. Savrie, C. Lazzeroni, R. Granier de Cassagnac, Roberto Guida, R. Casali, G. Tatishvili, G. Bocquet, Yu. Potrebenikov, G. Kalmus, R. J. Batley, H.G. Becker, Cristina Biino, Ivan Mikulec, J.B. Cheze, P. Lubrano, S.A. Schmidt, Victoria Jane Martin, E. Imbergamo, Mayda Velasco, H. Taureg, Andrea Bizzeti, Michael Ziolkowski, G.D. Barr, M. Martini, J. Ocariz, I. Wingerter, Alexi Mestvirishvili, Adrian John Bevan, and E. Menichetti

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Particle physics, Large Hadron Collider, 010308 nuclear & particles physics, Branching fraction, 0103 physical sciences, Detector, Limit (mathematics), 010306 general physics, 01 natural sciences, Beam (structure)
Abstract

A search for the decay K S → π 0 γγ has been made using the NA48 detector at the CERN SPS. Using data collected in 1999 during a 40-hour run with a high-intensity K S beam, an upper limit for the branching ratio BR ( K S → π 0 γγ , z ⩾0.2) −7 has been obtained at 90% confidence level, where z = m γγ 2 / m K 0 2 .

Published
2016

6. Precise measurement of the decay KL → π0γγ

Author

A. Lai, D. Marras, A. Bevan, R.S. Dosanjh, T.J. Gershon, B. Hay, G.E. Kalmus, C. Lazzeroni, D.J. Munday, M.D. Needham, E. Olaiya, M.A. Parker, T.O. White, S.A. Wotton, G. Barr, G. Bocquet, A. Ceccucci, T. Cuhadar-Dönszelmann, D. Cundy, G. D'Agostini, N. Doble, V. Falaleev, L. Gatignon, A. Gonidec, B. Gorini, G. Govi, P. Grafström, W. Kubischta, A. Lacourt, M. Lenti, S. Luitz, I. Mikulec, A. Norton, S. Palestini, B. Panzer-Steindel, G. Tatishvili, H. Taureg, M. Velasco, H. Wahl, C. Cheshkov, P. Hristov, V. Kekelidze, D. Madigojine, N. Molokanova, Yu. Potrebenikov, A. Zinchenko, I. Knowles, V. Martin, R. Sacco, A. Walker, M. Contalbrigo, P. Dalpiaz, J. Duclos, P.L. Frabetti, A. Gianoli, M. Martini, F. Petrucci, M. Savrié, A. Bizzeti, M. Calvetti, G. Collazuol, G. Graziani, E. Iacopini, M. Veltri, H.G. Becker, M. Eppard, H. Fox, K. Holtz, A. Kalter, K. Kleinknecht, U. Koch, L. Köpke, P. Lopes da Silva, P. Maruelli, I. Pellmann, A. Peters, B. Renk, S.A. Schmidt, V. Schönharting, Y. Schué, R. Wanke, A. Winhart, M. Wittgen, J.C. Chollet, L. Fayard, L. Iconomidou-Fayard, J. Ocariz, G. Unal, I. Wingerter-Seez, G. Anzivino, P. Cenci, E. Imbergamo, P. Lubrano, A. Mestvirishvili, A. Nappi, M. Pepe, M. Piccini, R. Carosi, R. Casali, C. Cerri, M. Cirilli, F. Costantini, R. Fantechi, S. Giudici, I. Mannelli, G. Pierazzini, M. Sozzi, J.B. Cheze, J. Cogan, M. De Beer, P. Debu, A. Formica, R. Granier de Cassagnac, E. Mazzucato, B. Peyaud, R. Turlay, B. Vallage, M. Holder, A. Maier, M. Ziolkowski, R. Arcidiacono, C. Biino, N. Cartiglia, M. Clemencic, F. Marchetto, E. Menichetti, N. Pastrone, J. Nassalski, E. Rondio, M. Szleper, W. Wislicki, S. Wronka, H. Dibon, G. Fischer, M. Jeitler, M. Markytan, G. Neuhofer, M. Pernicka, A. Taurok, and L. Widhalm

Subjects
mesoni K, decadimenti rari, Physics, Coupling constant, Nuclear and High Energy Physics, Particle physics, Branching fraction, Astrophysics::High Energy Astrophysical Phenomena, Astrophysics::Cosmology and Extragalactic Astrophysics, Gamma gamma, Pi, High Energy Physics::Experiment, Nuclear Experiment, Astrophysics::Galaxy Astrophysics
Abstract

The decay rate of $\klpgg$ has been measured with the NA48 detector at the CERN SPS. A total of 2558 $\klpgg$ candidates have been observed with a residual background of 3.2%. The branching ratio is determined to be $(1.36 \pm0.03_{(stat)} \pm0.03_{(syst)}\pm 0.03_{(norm)})\times10^{-6}$ and the vector coupling constant $a_v = -0.46 \pm0.03_{(stat)} \pm0.04_{(syst)}$. This result suggests that the CP-violation effects are dominating in the $\klpee$ decay. An upper limit for the $\klpgg$ decay rate in the two photon mass region $m_{\gamma\gamma}

Published
2016

7. Measurement of K-e3(0) form factors

Author

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

Subjects
Physics, Semileptonic decay, Nuclear and High Energy Physics, Meson, Scalar (mathematics), Hadron, SEMI-LEPTONIC DECAYS, RADIATIVE-CORRECTIONS, TENSOR INTERACTIONS, MONTE-CARLO, KAONS, Form factor (quantum field theory), Zero (complex analysis), Dalitz plot, Weak interaction, NO, Atomic physics, Particle Physics - Experiment
Abstract

The semi-leptonic decay of the neutral K meson $K^{0}_{L} \to \pi^{\pm}e^{\mp}\nu (K_{e3})$, was used to study the strangeness-changing weak interaction of hadrons. A sample of 5.6 million reconstructed events recorded by the NA48 experiment was used to measure the Dalitz plot density. Admitting all possible Lorentz-covariant couplings, the form factors for vector $(f_{+}(q^{2}))$, scalar $(f_{S})$ and tensor $(f_{T})$ interactions were measured. The linear slope of the vector form factor $\lambda_{+} = 0.0284 \pm 0.0007 \pm 0.0013$ and values for the ratios $|f_{S}/f_{+}(0)|=0.015^{+0.007}_{-0.010} \pm 0.012$ and $|f_{T}/f_{+}(0)|=0.05^{+0.03}_{-0.04} \pm 0.03$ were obtained. The values for $f_{S}$ and for $f_{T}$ are consistent with zero. Assuming only vector-axial vector couplings, $\lambda_{+} = 0.02888 \pm 0.0004 \pm 0.0011$ and a good fit consistent with pure V-A couplings were obtained. Alternatively a fit to a dipole form factor yields a pole mass of $M = 859 \pm 18$ MeV, consistent with the $K^{*}(892)$ mass. The semileptonic decay of the neutral K meson, KL0→π±e∓ν ( Ke3 ), was used to study the strangeness-changing weak interaction of hadrons. A sample of 5.6 million reconstructed events recorded by the NA48 experiment was used to measure the Dalitz plot density. Admitting all possible Lorentz-covariant couplings, the form factors for vector (f+(q2)) , scalar ( fS ) and tensor ( fT ) interactions were measured. The linear slope of the vector form factor λ+=0.0284±0.0007±0.0013 and values for the ratios |fS/f+(0)|=0.015−0.010+0.007±0.012 and |fT/f+(0)|=0.05−0.04+0.03±0.03 were obtained. The values for fS and fT are consistent with zero. Assuming only vector–axial-vector couplings, λ+=0.0288±0.0004±0.0011 and a good fit consistent with pure V–A couplings were obtained. Alternatively, a fit to a dipole form factor yields a pole mass of M=859±18 MeV , consistent with the K*(892) mass. The semileptonic decay of the neutral K meson, KL -> pi e nu (Ke3), was used to study the strangeness-changing weak interaction of hadrons. A sample of 5.6 million reconstructed events recorded by the NA48 experiment was used to measure the Dalitz plot density. Admitting all possible Lorentz-covariant couplings, the form factors for vector (f_+(q^2)), scalar (f_S) and tensor (f_T) interactions were measured. The linear slope of the vector form factor lambda_+ = 0.0284+-0.0007+-0.0013 and values for the ratios |f_S/f_+(0)| = 0.015^{+0.007}_{-0.010}+-0.012 and |f_T/f_+(0)| = 0.05^{+0.03}_{-0.04}+-0.03 were obtained. The values for f_S and f_T are consistent with zero. Assuming only Vector-Axial vector couplings, lambda_+ = 0.0288+-0.0004+-0.0011 and a good fit consistent with pure V-A couplings were obtained. Alternatively, a fit to a dipole form factor yields a pole mass of M = 859+-18 MeV, consistent with the K^*(892) mass.

Published
2016

8. 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

9. Measurement of Kμ30 form factors

Author

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

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, 010308 nuclear & particles physics, 0103 physical sciences, Form factor (quantum field theory), Dalitz plot, NA48 experiment, 010306 general physics, 01 natural sciences
Abstract

This Letter reports on a new high precision measurement of the form factors of the K L → π ± μ ∓ ν μ decay. The data sample of about 2.3 × 10 6 events was recorded in 1999 by the NA48 experiment at CERN. Studying the Dalitz plot density we measured a linear, λ + ′ = ( 20.5 ± 2.2 stat ± 2.4 syst ) × 10 −3 , and a quadratic, λ + ″ = ( 2.6 ± 0.9 stat ± 1.0 syst ) × 10 −3 term in the power expansion of the vector form factor. No evidence was found for a second order term for the scalar form factor; the linear slope was determined to be λ 0 = ( 9.5 ± 1.1 stat ± 0.8 syst ) × 10 −3 . Using a linear fit our results were: λ + = ( 26.7 ± 0.6 stat ± 0.8 syst ) × 10 −3 and λ 0 = ( 11.7 ± 0.7 stat ± 1.0 syst ) × 10 −3 . A pole fit of the form factors yields: m V = ( 905 ± 9 stat ± 17 syst ) MeV / c 2 and m S = ( 1400 ± 46 stat ± 53 syst ) MeV / c 2 .

Published
2007

10. Measurement of the ratio Γ(KL→π+π−)/Γ(KL→π±e∓ν) and extraction of the CP violation parameter |η+−

Author

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

Subjects
Physics, Nuclear physics, Nuclear and High Energy Physics, Photon emission, 010308 nuclear & particles physics, Branching fraction, 0103 physical sciences, Extraction (chemistry), Analytical chemistry, NA48 experiment, CP violation, 010306 general physics, 01 natural sciences
Abstract

We present a measurement of the ratio of the decay rates Γ ( K L → π + π − ) / Γ ( K L → π ± e ∓ ν ) , denoted as Γ K 2 π / Γ K e 3 . The analysis is based on data taken during a dedicated run in 1999 by the NA48 experiment at the CERN SPS. Using a sample of 47 000 K 2 π and five million K e 3 decays, we find Γ K 2 π / Γ K e 3 = ( 4.835 ± 0.022 stat . ± 0.016 syst . ) × 10 −3 . From this we derive the branching ratio of the CP violating decay K L → π + π − and the CP violation parameter | η + − | . Excluding the CP conserving direct photon emission component K L → π + π − γ , we obtain the results BR ( K L → π + π − ) = ( 1.941 ± 0.019 ) × 10 −3 and | η + − | = ( 2.223 ± 0.012 ) × 10 −3 .

Published
2007

11. Measurement of the KL→e+e−e+e− decay rate

Author

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

Subjects
Physics, Nuclear and High Energy Physics, Meson, Branching fraction, Analytical chemistry, Atomic physics, Positron annihilation
Abstract

The decay rate of the long-lived neutral K meson into the e + e − e + e − final state has been measured with the NA48 detector at the CERN SPS. Using data collected in 1998 and 1999, a total of 200 events has been observed with negligible background. This observation corresponds to a branching ratio of Br ( K L → e + e − e + e − ) = ( 3.30 ± 0.24 stat ± 0.23 syst ± 0.10 norm ) × 10 −8 .

Published
2005

12. Search for CP violation in K0→3π0 decays

Author

Konrad Kleinknecht, M. Holder, G. Graziani, W. Wislicki, A. Gonidec, M. Wittgen, E. Rondio, Andrea Bizzeti, J. C. Chollet, G. Collazuol, J. Nassalski, P. F. Dalpiaz, V. Falaleev, D. Madigojine, P. Lopes da Silva, Nadia Pastrone, R. Fantechi, I. Pellmann, Benedetto Gorini, G. Bocquet, Yu. Potrebenikov, T.J. Gershon, S. Giudici, T. Cuhadar-Dönszelmann, Milene Calvetti, Augusto Ceccucci, Vladimir Kekelidze, Manfred Jeitler, F. Martelli, A. Lai, Andrea Formica, R.S. Dosanjh, F. Derue, M. Martini, G.D. Barr, B. Vallage, G. Neuhofer, M. Markytan, J. Duclos, G. Anzivino, H. D. Wahl, Lydia Iconomidou-Fayard, M. Lenti, N. A. Molokanova, K. Eppard, P. Marouelli, C. Cerri, D.C. Cundy, G. Gouge, R. Turlay, H. Dibon, G. Marel, B. Peyaud, F. Costantini, Rainer Wanke, U. Koch, A. Peters, Y. Schué, M. Pepe, P. Debu, A. Winhart, C. Cheshkov, Fabrizio Petrucci, Mauro Piccini, G.M. Pierazzini, T.O. White, G. Unal, S. A. Wotton, P. Lubrano, W. Kubischta, B. Panzer-Steindel, P. Rubin, S.A. Schmidt, S. Wronka, Alexi Mestvirishvili, P.L. Frabetti, Nicolo Cartiglia, Michael Ziolkowski, E. Imbergamo, J.B. Cheze, Michael Andrew Parker, Luca Fiorini, Louis Fayard, F. Marchetto, D. Marras, L. Widhalm, E. Iacopini, Alan W. Walker, V. Schönharting, Cristina Biino, Ivan Mikulec, I. Wingerter-Seez, P. Grafström, M. Sozzi, G. Tatishvili, A. Nappi, M. Eppard, J. R. Batley, Massimiliano Fiorini, M. Cirilli, Niels Doble, Michal Szleper, R. Sacco, A. Lacourt, M. Savrie, E. Menichetti, G.E. Kalmus, M. De Beer, Roberta Arcidiacono, R. Casali, M. Veltri, Lau Gatignon, A. Norton, P. Cenci, M. Contalbrigo, A. Maier, P. Hristov, L. Köpke, D.J. Munday, Victoria Jane Martin, E. Olaiya, Cristina Lazzeroni, E. Mazzucato, A. I. Zinchenko, M. Pernicka, A. Gianoli, R. Granier de Cassagnac, A. Hirstius, Anton Taurok, I. Mestvirishvili, and I. Mannelli

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Particle physics, Amplitude, 010308 nuclear & particles physics, Branching fraction, 0103 physical sciences, Pi, CP violation, 010306 general physics, Lifetime distribution, 01 natural sciences
Abstract

Using data taken during the year 2000 with the NA48 detector at the CERN SPS, a search for the CP violating decay K S → 3 π 0 has been performed. From a fit to the lifetime distribution of about 4.9 million reconstructed K 0 / K ¯ 0 → 3 π 0 decays, the CP violating amplitude η 000 = A ( K S → 3 π 0 ) / A ( K L → 3 π 0 ) has been found to be Re ( η 000 ) = − 0.002 ± 0.011 ± 0.015 and Im ( η 000 ) = − 0.003 ± 0.013 ± 0.017 . This corresponds to an upper limit on the branching fraction of Br ( K S → 3 π 0 ) 7.4 × 10 −7 at 90% confidence level. The result is used to improve knowledge of Re ( e ) and the CPT violating quantity Im ( δ ) via the Bell–Steinberger relation.

Published
2005

13. Measurement of the branching ratio of the decay and extraction of the CKM parameter

Author

A. Lai, D. Marras, A. Bevan, R.S. Dosanjh, T.J. Gershon, B. Hay, G.E. Kalmus, C. Lazzeroni, D.J. Munday, E. Olaiya, M.A. Parker, T.O. White, S.A. Wotton, G. Barr, G. Bocquet, A. Ceccucci, T. Cuhadar-Dönszelmann, D. Cundy, G. D'Agostini, N. Doble, V. Falaleev, L. Gatignon, A. Gonidec, B. Gorini, G. Govi, P. Grafström, W. Kubischta, A. Lacourt, A. Norton, S. Palestini, B. Panzer-Steindel, H. Taureg, M. Velasco, H. Wahl, C. Cheshkov, A. Gaponenko, P. Hristov, V. Kekelidze, L. Litov, D. Madigojine, N. Molokanova, Yu. Potrebenikov, S. Stoynev, G. Tatishvili, A. Tkatchev, A. Zinchenko, I. Knowles, V. Martin, R. Sacco, A. Walker, M. Contalbrigo, P. Dalpiaz, J. Duclos, P.L. Frabetti, A. Gianoli, M. Martini, F. Petrucci, M. Savrié, A. Bizzeti, M. Calvetti, G. Collazuol, G. Graziani, E. Iacopini, M. Lenti, F. Martelli, M. Veltri, H.G. Becker, K. Eppard, M. Eppard, H. Fox, A. Kalter, K. Kleinknecht, U. Koch, L. Köpke, P. Lopes da Silva, P. Marouelli, I. Pellmann, A. Peters, B. Renk, S.A. Schmidt, V. Schönharting, Y. Schué, R. Wanke, A. Winhart, M. Wittgen, J.C. Chollet, L. Fayard, L. Iconomidou-Fayard, J. Ocariz, G. Unal, I. Wingerter-Seez, G. Anzivino, P. Cenci, E. Imbergamo, P. Lubrano, A. Mestvirishvili, A. Nappi, M. Pepe, M. Piccini, R. Casali, C. Cerri, M. Cirilli, F. Costantini, R. Fantechi, L. Fiorini, S. Giudici, G. Lamanna, I. Mannelli, G. Pierazzini, M. Sozzi, J.B. Cheze, J. Cogan, M. De Beer, P. Debu, A. Formica, R. Granier de Cassagnac, E. Mazzucato, B. Peyaud, R. Turlay, B. Vallage, M. Holder, A. Maier, M. Ziolkowski, R. Arcidiacono, C. Biino, N. Cartiglia, R. Guida, F. Marchetto, E. Menichetti, N. Pastrone, J. Nassalski, E. Rondio, M. Szleper, W. Wislicki, S. Wronka, H. Dibon, G. Fischer, M. Jeitler, M. Markytan, I. Mikulec, G. Neuhofer, M. Pernicka, A. Taurok, and L. Widhalm

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Particle physics, Cabibbo–Kobayashi–Maskawa matrix, Branching fraction, Coupling parameter, Extraction (chemistry), Form factor (quantum field theory), Measure (mathematics)
Abstract

We present a new measurement of the branching ratio R of the decay K L → π ± e ∓ ν , denoted as K e 3 , relative to all charged K L decays with two tracks, based on data taken with the NA48 detector at the CERN SPS. We measure R = 0.4978 ± 0.0035 . From this we derive the K e 3 branching fraction and the weak coupling parameter | V u s | in the CKM matrix. We obtain | V u s | f + ( 0 ) = 0.2146 ± 0.0016 , where f + ( 0 ) is the vector form factor in the K e 3 decay.

Published
2004

14. Measurement of the Ξ0→Λγ decay asymmetry and branching fraction

Author

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

Subjects
Physics, Particle physics, Nuclear and High Energy Physics, Large Hadron Collider, Branching fraction, media_common.quotation_subject, iperoni Xi0, Hyperon, Radiative decay, NA48 experiment, Asymmetry, Nuclear physics, decadimenti radiativi, Radiative transfer, media_common
Abstract

In data taken with the NA48 experiment at the CERN SPS in 1999, 730 candidates of the weak radiative hyperon decay Ξ0→Λγ have been found with an estimated background of 58±8 events. From these events the Ξ0→Λγ decay asymmetry has been determined to α(Ξ0→Λγ)=-0.78±0.18stat±0.06 syst, which is the first evidence of a decay asymmetry in Ξ 0→Λγ. The branching fraction of the decay has been measured to be Br(Ξ0→Λγ)=(1.16±0.05 stat±0.06syst)×10-3. © 2004 Elsevier B.V. All rights reserved.

Published
2004
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15. 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

16. Observation of the decay KS→π+π−e+e−

Author

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

Subjects
mesoni K, decadimenti rari, Physics, Nuclear physics, Nuclear and High Energy Physics, Branching fraction, Bremsstrahlung, NA48 experiment
Abstract

We present the first observation of the decay KS→π+π−e+e− based upon the data collected in 1998 by the NA48 experiment at CERN. We have identified a clean sample of 56 events with negligible background contamination. Using KL→π+π−π0D decays as normalization sample, the branching ratio is measured to be BR(KS→π+π−e+e−)=[4.5±0.7(stat)±0.4(syst)]×10−5. This result is in good agreement with the theoretical expectations from the mechanism of inner bremsstrahlung.

Published
2000

17. 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

18. CPandCPTsymmetry tests from the two-pion decays of the neutral kaon with the Fermilab E731 detector

Author

G. Makoff, M. Karlsson, Roland Winston, P. Debu, T. Yamanaka, R. Coleman, J. R. Patterson, B. Peyaud, B. Winstein, Y. B. Hsiung, A. R. Barker, R. Turlay, V. Papadimitriou, G. J. Bock, George D Gollin, B. Vallage, L. K. Gibbons, E. Swallow, J. Enagonio, Erik Ramberg, Sunil Somalwar, K. Stanfield, H. Yamamoto, J. K. Okamitsu, Y. W. Wah, M. Woods, B. Schwingenheuer, R. Tschirhart, and R. A. Briere

Subjects
Physics, Nuclear physics, Nuclear and High Energy Physics, Particle physics, Pion, Physics::Instrumentation and Detectors, CPT symmetry, Monte Carlo method, Detector, CP violation, High Energy Physics::Experiment, Fermilab, Experimental methods
Abstract

We present a comprehensive treatment of the precise determinations of the parameters Re({var_epsilon}{sup {prime}}/{var_epsilon}), {tau}{sub S}, {Delta}m, {phi}{sub +{minus}}, and {Delta}{phi} in the neutral kaon system with the Fermilab E731 detector. Together, these determinations allow accurate studies of both CP and CPT symmetry. Details of the detector and its performance and the data analysis are given. The extensive Monte Carlo simulation of the detector and comparison with data are also presented. {copyright} {ital 1997} {ital The American Physical Society}

Published
1997

19. High resolution drift chambers for the NA48 experiment at CERN

Author

G. Tarte, Stéphane Schanne, B. Vallage, F. Louis, J.B. Cheze, R. Turlay, D. Bederede, E. Mazzucato, S. Edard, O. Steinkamp, M. De Beer, B. Peyaud, L. Gosset, A. Migliori, J. Heitzmann, Dominique Durand, and P. Debu

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Particle physics, Large Hadron Collider, Physics::Instrumentation and Detectors, CP violation, High resolution, NA48 experiment, High Energy Physics::Experiment, Instrumentation
Abstract

We discuss construction details of large drift chambers for the NA48 experiment at CERN. Preliminary measurements on their performance are also presented.

Published
1995

20. Performance of an electromagnetic liquid krypton calorimeter

Author

D. Schiuma, G. Viehhauser, W. Seidl, D. Schinzel, G. Linser, C. Cerri, P. Lubrano, B. Hallgren, L. Piemontese, A. Lacourt, J. Kekelidze, A. Norton, Sandro Palestini, Benedetto Gorini, C. E. Wulz, M. Markytan, N. Doble, A. Kalinin, P. Cenci, M. Martini, G. Neuhofer, Cristina Biino, A. Gianoli, J. Duclos, D.C. Cundy, H. Taureg, D. Coward, R. Fantechi, V. Marzulli, P. Calafiura, M. Pepe, P. Debu, E. Mazzucato, A. Migliori, V. Fanti, Peter Buchholz, A. Ceccucci, A. Kreutz, E. Griesmayer, M. Pernicka, G. Laverrière, H. D. Wahl, P. Lariccia, F. Leber, B. Peyaud, G. Kesseler, I. Mannelli, G.D. Barr, L. Gatignon, A. Gonidec, T. Taurok, R. Turlay, M. Savrie, F. Laico, Y. Kozhevnikov, and T. Stemmler

Subjects
Physics, Nuclear and High Energy Physics, Large Hadron Collider, Muon, Calorimeter (particle physics), Physics::Instrumentation and Detectors, Krypton, Detector, chemistry.chemical_element, Electron, Nuclear physics, chemistry, High Energy Physics::Experiment, Detectors and Experimental Techniques, Nuclear Experiment, Instrumentation, Image resolution, Noise (radio)
Abstract

A prototype electromagnetic calorimeter containing 180 litres of liquid krypton has been tested in electron and muon beams at the CERN SPS. The main features of this detector are its active shower medium, a granularity of 2 cm with tower readout, and the use of the initial current readout technique with an effective shaping time of about 60 ns. An energy resolution for electrons of 4.1% √E[ GeV ] with a constant term of 0.4% and a noise contribution of 50 MeV has been achieved. The calorimeter has a spatial resolution of 4.5 mm √E[ GeV ] with a constant term of 0.3 mm and a time resolution of about 0.5 ns for energies larger than 10 GeV.

Published
1994

21. Simultaneous measurement ofKSandKLdecays intoπ+π−γ

Author

R. Coleman, E. Ramberg, R. Tschirhart, M. Karlsson, Roland Winston, R. Turlay, B. Winstein, E. C. Swallow, B. Peyaud, V. Papadimitriou, G.A. Blair, Y. W. Wah, G. J. Bock, B. Vallage, George D Gollin, A. R. Barker, L. K. Gibbons, J. R. Patterson, T. Yamanaka, R. A. Briere, K. Stanfield, Y. B. Hsiung, G. Makoff, P. Debu, J. K. Okamitsu, Sunil Somalwar, H. Yamamoto, J. Enagonio, and M. Woods

Subjects
Combinatorics, Physics, Statistics::Theory, Particle physics, Statistics::Applications, Meson, Branching fraction, Hadron, Energy spectrum, General Physics and Astronomy, Elementary particle, Photon energy
Abstract

With the E731 apparatus at Fermilab, we have simultaneously collected 6859 ${\mathit{K}}_{\mathit{L}}$ and ${\mathit{K}}_{\mathit{S}}$ decays into ${\mathrm{\ensuremath{\pi}}}^{+}$${\mathrm{\ensuremath{\pi}}}^{\mathrm{\ensuremath{-}}}$\ensuremath{\gamma}. Using our sample of over 370 000 ${\mathrm{\ensuremath{\pi}}}^{+}$${\mathrm{\ensuremath{\pi}}}^{\mathrm{\ensuremath{-}}}$ decays for normalization we have determined that the ratio \ensuremath{\Gamma}(${\mathit{K}}^{0}$\ensuremath{\rightarrow}${\mathrm{\ensuremath{\pi}}}^{+}$${\mathrm{\ensuremath{\pi}}}^{\mathrm{\ensuremath{-}}}$\ensuremath{\gamma})/\ensuremath{\Gamma}(${\mathit{K}}^{0}$\ensuremath{\rightarrow}${\mathrm{\ensuremath{\pi}}}^{+}$${\mathrm{\ensuremath{\pi}}}^{\mathrm{\ensuremath{-}}}$) is (23.0\ifmmode\pm\else\textpm\fi{}0.7)\ifmmode\times\else\texttimes\fi{}${10}^{\mathrm{\ensuremath{-}}3}$ for ${\mathit{K}}_{\mathit{L}}$ and (7.10\ifmmode\pm\else\textpm\fi{}0.22)\ifmmode\times\else\texttimes\fi{}${10}^{\mathrm{\ensuremath{-}}3}$ for ${\mathit{K}}_{\mathit{S}}$, for photon energies greater than 20 MeV in the kaon center of mass. After removing the inner-bremsstrahlung contribution, we find that the photon energy spectrum of the direct emission decay of the ${\mathit{K}}_{\mathit{L}}$ is consistent with the presence of a vector meson propagator in the form factor.

Published
1993

22. Measurement of the CP-Violation Parameterη+−γin Neutral Kaon Decays

Author

J. Enagonio, E. Ramberg, P. Debu, K. Stanfield, T. Yamanaka, George D Gollin, Y. B. Hsiung, R. Tschirhart, R. Turlay, G.A. Blair, J. K. Okamitsu, G. J. Bock, B. Peyaud, E. C. Swallow, R. Coleman, B. Vallage, and M. Karlsson

Subjects
Nuclear physics, Combinatorics, Physics, Meson, Phase angle, Hadron, General Physics and Astronomy, CP violation, High Energy Physics::Experiment, Elementary particle
Abstract

Interference between ${\mathrm{K}}_{\mathrm{S}}$ and ${\mathrm{K}}_{\mathrm{L}}$ decays into the final state ${\mathrm{\ensuremath{\pi}}}^{+}$${\mathrm{\ensuremath{\pi}}}^{\mathrm{\ensuremath{-}}}$\ensuremath{\gamma} has been observed in experiment 731 at Fermilab. By fitting the distribution of decays downstream of a regenerator, a new CP-violation parameter${\mathrm{\ensuremath{\eta}}}_{+\mathrm{\ensuremath{-}}\ensuremath{\gamma}}$, analogous to ${\mathrm{\ensuremath{\eta}}}_{+\mathrm{\ensuremath{-}}}$, has been measured, with its magnitude equal to(2.15\ifmmode\pm\else\textpm\fi{}0.26\ifmmode\pm\else\textpm\fi{}0.20)\ifmmode\times\else\texttimes\fi{}${10}^{\mathrm{\ensuremath{-}}3}$, and ${\mathrm{\ensuremath{\varphi}}}_{+\mathrm{\ensuremath{-}}\ensuremath{\gamma}}$, the associated phase angle, equal to(72\ifmmode\pm\else\textpm\fi{}23\ifmmode\pm\else\textpm\fi{}17)\ifmmode^\circ\else\textdegree\fi{}. Assuming that any difference between this fit value for ${\mathrm{\ensuremath{\eta}}}_{+\mathrm{\ensuremath{-}}\ensuremath{\gamma}}$ and the previously measured value for${\mathrm{\ensuremath{\eta}}}_{+\mathrm{\ensuremath{-}}}$ can be attributed to direct CP violation in this decay, a limit of|${\mathrm{\ensuremath{\epsilon}}}_{+\mathrm{\ensuremath{-}}\ensuremath{\gamma}}^{\ensuremath{'}}$|/\ensuremath{\epsilon}0.3 at the 90% confidence level has been made. \textcopyright{} 1993 The American Physical Society

Published
1993

23. Study of the decayKL→π±π0e∓ν¯(ν)

Author

M. Karlsson, J. R. Patterson, E. J. Ramberg, Roland Winston, R. Turlay, E. C. Swallow, B. Winstein, George D Gollin, L. K. Gibbons, P. Debu, V. Papadimitriou, J. Enagonio, M. Woods, R. Tschirhart, Sunil Somalwar, R. Coleman, K. Okamitsu, B. Vallage, H. Yamamoto, B. Peyaud, G. J. Bock, A. R. Barker, T. Yamanaka, K. Stanfield, Y. W. Wah, G. Makoff, R. A. Briere, and Y. B. Hsiung

Subjects
Physics, Semileptonic decay, Particle properties, Chiral perturbation theory, Meson, Branching fraction, General Physics and Astronomy, Calculation methods, Combinatorics, Particle decay, symbols.namesake, TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY, symbols, Lagrangian
Abstract

We have observed 729[plus minus]15 [ital K][sub [ital L]][r arrow][pi][sup [plus minus]][pi][sup 0][ital e[minus plus]][bar [nu]]([nu]) decays in the data set collected in the 1987--1988 run of Fermilab experiment E731. We found the [ital K][sub [ital e]4] branching ratio to be [5.16[plus minus]0.20(stat)[plus minus]0.22(sys)][times]10[sup [minus]5]. We also performed the first measurement of the form factors parametrizing the decay. Our branching ratio result agrees with a prediction using a vector-meson-exchange model. An interpretation of the data in terms of chiral perturbation theory implies a value [ital L][sub 3]=(3.4[plus minus]0.4)[times]10[sup [minus]3] in the O([ital p][sup 4]) chiral Lagrangian.

Published
1993

24. New measurements of the neutral kaon parameters Δm,τS,Φ00-Φ+−, andΦ+−

Author

J. R. Patterson, Sunil Somalwar, M. Karlsson, V. Papadimitriou, H. Yamamoto, Roland Winston, J. K. Okamitsu, B. Schwingenheuer, G. Makoff, B. Winstein, K. Stanfield, B. Peyaud, George D Gollin, Y. W. Wah, P. Debu, L. K. Gibbons, R. Coleman, R. A. Briere, Y. B. Hsiung, B. Vallage, A. R. Barker, E. J. Ramberg, R. Turlay, R. Tschirhart, E. C. Swallow, J. Enagonio, M. Woods, T. Yamanaka, and G. J. Bock

Subjects
Combinatorics, Physics, Phase difference, Particle physics, Parametric analysis, Meson, TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY, General Physics and Astronomy, MathematicsofComputing_DISCRETEMATHEMATICS
Abstract

The full E731 data set is used to provide precise determinations of several parameters of the neutral kaon. We find the [ital K][sub [ital S]] lifetime [tau][sub [ital S]]=(0.8929[plus minus]0.0016)[times]10[sup [minus]10] s, the [ital K][sub [ital L]-][ital K[ital S]] mass difference [Delta][ital m]=(0.5286[plus minus]0.0028)[times]10[sup 10][h bar] s[sup [minus]1] the phase of [eta][sub +[minus]], [Phi][sub +[minus]]=42.4[degree][plus minus]1.4[degree], and the phase difference between [Phi][sub 00] and [Phi][sub +[minus]], [Delta][Phi]=[minus]1.6[degree][plus minus]1.2[degree]. Comparisons with previous experiments and with [ital CPT] symmetry are given.

Published
1993

25. Measurement of theCP-violation parameter Re(ɛ’/ɛ)

Author

K. Stanfield, B. Winstein, P. Debu, A. R. Barker, R. A. Briere, J. R. Patterson, Y. B. Hsiung, E. J. Ramberg, R. Turlay, G. Makoff, G. J. Bock, Sunil Somalwar, H. Yamamoto, George D Gollin, L. K. Gibbons, R. Coleman, E. C. Swallow, J. K. Okamitsu, B. Schwingenheuer, B. Peyaud, Y. W. Wah, J. Enagonio, B. Vallage, M. Woods, T. Yamanaka, R. Tschirhart, V. Papadimitriou, M. Karlsson, and Roland Winston

Subjects
Hadronic decay, Physics, Combinatorics, Particle physics, Particle decay, Meson, Parametric analysis, General Physics and Astronomy, NA48 experiment, CP violation, Prime (order theory), Calculation methods
Abstract

A measurement of the [ital CP]-violation parameter Re([var epsilon][prime]/[var epsilon]) has been made using the full E731 data set. We find Re([var epsilon][prime]/[var epsilon])=(7.4[plus minus]5.2[plus minus]2.9)[times]10[sup [minus]4] where the first error is statistical and the second systematic.

Published
1993

26. Search for the decay

Author

R. Coleman, B. Vallage, G. Makoff, V. Papadimitriou, S. Somalwar, G. Graham, Juliet Ritchie Patterson, P. Debu, R. Tschirhart, E. J. Ramberg, T. Yamanaka, R. A. Briere, Y. W. Wah, B. Winstein, E. C. Swallow, L. K. Gibbons, G. D. Collin, G. J. Bock, H. Yamamoto, R. Turlay, Y. B. Hsiung, M. Karlsson, Roland Winston, K. Stanfield, B. Peyaud, A. R. Barker, and J. Enagonio

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Fermilab, Short distance, Standard Model
Abstract

Data collected in Fermilab experiment E731 was used to perform the first search for the decay K L → π 0 vv. This decay is dominated by short distance effects and is almost entirely direct CP violating within the standard model. Cuts were developed to reject the background processes Λ → nπ 0 and K L → π + e − γv. No candidate events were seen. We find BR (K L → π 0 vv) < 2.2.×10 − at the 90% confidence level

Published
1992

27. Prompt neutrino results from a proton beam dump experiment

Author

V. Hepp, Konrad Kleinknecht, W. von Rüden, H. Taureg, Jan Krolikowski, B. Falkenburg, T. Flottmann, P. Perez, Jean-Pierre Merlo, R. W. Williams, R. Turlay, B. Renk, F. Ranjard, Joseph Rothberg, D. Pollmann, H. D. Wahl, P. Berge, John Rander, R. Hagelberg, B. Peyaud, H. Blümer, J. Steinberger, J. De Groot, Claude Guyot, P. Buchholz, R. Belusević, K. Tittel, F. Dydak, P. Debu, F. Eisele, J. P. Schuller, J. Knobloch, C. Geweniger, A. Para, H. Keilwerth, B. Pszola, J. Duda, Jorg Wotschack, and H. Abramowicz

Subjects
Physics, Particle physics, Physics and Astronomy (miscellaneous), Proton, Physics::Instrumentation and Detectors, Branching fraction, Astrophysics::High Energy Astrophysical Phenomena, High Energy Physics::Phenomenology, Hadron, Electron, law.invention, Nuclear physics, law, Antimatter, Physics::Accelerator Physics, High Energy Physics::Experiment, Beam dump, Neutrino, Engineering (miscellaneous), Lepton
Abstract

A study of prompt neutrino events from 400 GeV protons on a beam-dump is presented. The ratio of electron- to muon-neutrino rates is 0.86±0.14, in agreement withe−μ universality. The anti-neutrino to neutrino flux ratio is $$\bar v_\mu /v_\mu = 0.81 \pm 0.19$$ . The absolute rates and distributions observed are shown to be in quantitative agreement with the known properties of charmedquark production in hadron collisions.

Published
1992

28. Measurement of the quadratic slope parameter in theKL→3π0decay Dalitz plot

Author

R. Turlay, B. Winstein, J. R. Patterson, V. Papadimitriou, E. J. Ramberg, A. R. Barker, J. Enagonio, Y. W. Wah, E. C. Swallow, R. Tschirhart, M. Karlsson, K. Stanfield, George D Gollin, Sunil Somalwar, Roland Winston, P. Debu, H. Yamamoto, L. K. Gibbons, J. K. Okamitsu, T. Yamanaka, G. Makoff, G. J. Bock, B. Vallage, R. A. Briere, Y. B. Hsiung, B. Peyaud, and R. Coleman

Subjects
Physics, Particle physics, Quadratic equation, Pion, General Physics and Astronomy, Value (computer science), Dalitz plot, High Energy Physics::Experiment, Elementary particle, Astrophysics::Cosmology and Extragalactic Astrophysics, Neutral particle, Charged particle
Abstract

We report a value of -[3.3±1.1 (stat)±0.7(syst)]×10 -3 for the quadratic slope parameter h in the Dalitz plot of the K L →3π 0 decay. This result is obtained from a sample of 5.1×10 6 decays. The validity of the ΔI=1/2 rule in the quadratic term is investigated using this result. This is the first measurement of the 3 0 slope parameter, and also the most sensitive measurement of any of the quadratic slope parameters for the charged or neutral kaons

Published
1992

29. Measurement of the branching ratio of the decayKL→π0γγ

Author

Juliet Ritchie Patterson, E. J. Ramberg, R. Turlay, E. Swallow, G. J. Bock, B. Winstein, M. Woods, Roland Winston, Y. W. Wah, George D Gollin, Sunil Somalwar, G. Makoff, H. Yamamoto, L. K. Gibbons, V. Papadimitriou, T. Yamanaka, R. A. Briere, M. Karlsson, R. Tschirhart, P. Debu, J. K. Okamitsu, Y. B. Hsiung, K. Stanfield, A. R. Barker, B. Vallage, B. Peyaud, R. Coleman, and J. Enagonio

Subjects
Physics, Crystallography, Particle decay, Meson, Branching fraction, Particle model, Hadron, Radiative decay, Spectral line
Abstract

Using the complete Fermilab E371 data set, we find {Gamma}({ital K}{sub {ital L}}{r arrow}{pi}{sup 0}{gamma}{gamma},+{ital m}{sub {gamma}{gamma}}{ge}0.280 GeV)/{Gamma}({ital K}{sub {ital L}}{r arrow}all) =(1.86{plus minus}0.60{plus minus}0.60){times}10{sup {minus}6}, in good agreement with a recent report of the first observation of this decay. For the low {gamma}{gamma} mass region we find {Gamma}({ital K}{sub {ital L}}{r arrow}{pi}{sup 0}{gamma}{gamma},{ital m}{sub {gamma}{gamma}}{lt}0.264 GeV)/{Gamma}({ital K}{sub {ital L}}{r arrow}all){lt} 5.1{times}10{sup {minus}6} (90% confidence).

Published
1991

30. A measurement of differential cross-sections and nucleon structure functions in charged-current neutrino interactions on iron

Author

H. Taureg, F. Eisele, J. P. Schuller, Jan Krolikowski, Helmut Burkhardt, Holt Meyer, H. Blümer, H. D. Brummel, R. Turlay, R. W. Williams, B. Renk, R. Geiges, F. Ranjard, E. Müller, H. D. Wahl, T. Alvarez, K. Tittel, Konrad Kleinknecht, B. Kampschulte, P. Buchholz, P. Perez, Claude Guyot, R. Belusević, P. Berge, V. Hepp, F. Perrier, A. Para, B. Vallage, B. Pszola, F. Dydak, A. Lipniacka, J. Wotschack, B. Peyaud, Joseph Rothberg, J. Duda, R. Hagelberg, C. Geweniger, J. Knobloch, P. Debu, P. Palazzi, H. Keilwerth, J. Steinberger, Jean-Pierre Merlo, Halina Abramowicz, B. Falkenburg, and Mieczyslaw Witold Krasny

Subjects
Quantum chromodynamics, Physics, Particle physics, Muon, Physics and Astronomy (miscellaneous), Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, High Energy Physics::Phenomenology, Inelastic scattering, Deep inelastic scattering, Nuclear physics, High Energy Physics::Experiment, Neutrino, Nuclear Experiment, Nucleon, Engineering (miscellaneous), Particle Physics - Experiment, Charged current, Lepton
Abstract

A high-statistics measurement of the differential cross-sections for neutrino-iron scattering in the wide-band neutrino beam at the CERN SPS is presented. Nucleon structure functions are extracted and theirQ 2 evolution is compared with the predictions of quantum chromodynamics.

Published
1991

31. Test ofCPTsymmetry through a determination of the difference in the phases ofη00andη+−inK→2π decays

Author

R. Turlay, E. Swallow, B. Peyaud, A. R. Barker, G. Makoff, G. J. Bock, R. Tschirhart, J. R. Patterson, B. Winstein, J. Enagonio, R. A. Briere, M. Woods, T. Yamanaka, R. J. Stefanski, P. Debu, Y. B. Hsiung, K. Stanfield, George D Gollin, V. Papadimitriou, L. K. Gibbons, Y. W. Wah, M. Karlsson, Roland Winston, B. Vallage, J. K. Okamitsu, R. Coleman, Sunil Somalwar, and H. Yamamoto

Subjects
Physics, Particle physics, Particle decay, Meson, Degree (graph theory), CPT symmetry, Computer Science::Information Retrieval, Hadron, General Physics and Astronomy, CP violation, High Energy Physics::Experiment, Elementary particle, Symmetry breaking
Abstract

Data collected by the E731 experiment at Fermilab were used to search for {ital CPT} violation in {ital K}{sup 0}{r arrow}{pi}{pi} decays by measuring the difference {Delta}{phi} between the phases of the {ital CP}-violating parameters {eta}{sub 00} and {eta}{sub +{minus}}. Our result, {Delta}{phi}={minus}0.3{degree}{plus minus}2.4{degree}{plus minus}1.2{degree}, where the first error is statistical and the second systematic, is consistent with {ital CPT} symmetry.

Published
1990

32. Determination of Re(ɛ’/ɛ) by the simultaneous detection of the fourKL,S→ππ decay modes

Author

R. A. Briere, J. K. Okamitsu, B. Winstein, M. Karlsson, Roland Winston, Y. B. Hsiung, V. Papadimitriou, Y. W. Wah, R. Coleman, T. Yamanaka, A. R. Barker, J. R. Patterson, J. C. Brisson, G. Makoff, G. J. Bock, George D Gollin, L. K. Gibbons, G.A. Blair, P. Debu, Sunil Somalwar, R. Turlay, H. Yamamoto, J. Enagonio, R. Tschirhart, B. Peyaud, E. C. Swallow, M. Woods, K. Stanfield, R. J. Stefanski, and B. Vallage

Subjects
Nuclear physics, Physics, Particle physics, Pion, Meson, Pi, General Physics and Astronomy, Weak interaction
Published
1990

33. First observation of the KS → π0γ γ decay

Author

Augusto Ceccucci, E. Olaiya, M. Markytan, M. Lenti, T. Cuhadar-Dönszelmann, E. Iacopini, P. Lubrano, P. Grafström, Rainer Wanke, S.A. Schmidt, E. Mazzucato, R.S. Dosanjh, E. Imbergamo, A. Gonidec, A. Lacourt, D. Madigojine, Nadia Pastrone, P. Debu, D. Marras, M. De Beer, G. Tatishvili, R. Fantechi, B. Vallage, G. Collazuol, M. Holder, G.M. Pierazzini, K. Holtz, Milene Calvetti, J. R. Batley, I. Mannelli, Victoria Jane Martin, M. Pernicka, M. Eppard, C. Cheshkov, H. Dibon, B. Panzer-Steindel, P. Rubin, M. Sozzi, S. A. Wotton, A. Peters, J. Nassalski, A. Hirstius, Michal Szleper, J.B. Cheze, Cristina Biino, Ivan Mikulec, Roberta Arcidiacono, C. Cerri, Luca Fiorini, A. Winhart, G. Bocquet, Yu. Potrebenikov, Mauro Piccini, M. Savrie, A. I. Zinchenko, E. Menichetti, G. Marel, A. Lai, G.E. Kalmus, R. Casali, A. Gianoli, R. Granier de Cassagnac, M. Wittgen, Benedetto Gorini, Andrea Formica, I. Pellmann, Cristina Lazzeroni, N. A. Molokanova, F. Derue, Konrad Kleinknecht, Anton Taurok, M. Cirilli, Niels Doble, T.O. White, G. Graziani, V. Falaleev, Louis Fayard, F. Marchetto, R. Sacco, G. Neuhofer, Lau Gatignon, I. Wingerter-Seez, Manfred Jeitler, J. Duclos, G. Unal, Andrea Bizzeti, G. Anzivino, W. Kubischta, I. Mestvirishvili, G. Gouge, F. Costantini, H. D. Wahl, F. Martelli, D.C. Cundy, B. Peyaud, S. Wronka, Alexi Mestvirishvili, Vladimir Kekelidze, L. Widhalm, P. Cenci, Y. Schué, Fabrizio Petrucci, J. C. Chollet, A. Nappi, M. Contalbrigo, M. Martini, Michael Ziolkowski, P.L. Frabetti, U. Koch, S. Giudici, A. Maier, P. Hristov, Nicolo Cartiglia, Michael Andrew Parker, G.D. Barr, Alan W. Walker, L. Köpke, W. Wislicki, V. Schönharting, E. Rondio, P. F. Dalpiaz, M. Pepe, T.J. Gershon, D.J. Munday, P. Lopes da Silva, Lydia Iconomidou-Fayard, P. Marouelli, M. Veltri, A. Norton, and R. Turlay

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Chiral perturbation theory, Large Hadron Collider, decadimenti, 010308 nuclear & particles physics, Branching fraction, Detector, 01 natural sciences, mesoni K, Nuclear physics, 0103 physical sciences, 010306 general physics
Abstract

Using the NA48 detector at the CERN SPS, 31 KS → π 0γγ candidates with an estimated background of 13.7 ± 3.2 events have been observed. This first observation leads to a branching ratio of BR(KS → π0γγ) z>0.2 = (4.9 ± 1.6stat ± 0.9 syst) × 10-8 in agreement with Chiral Perturbation Theory predictions. © 2003 Elsevier B.V. All rights reserved.

Published
2004

34. Precise measurements of the KS → γγ and KL → γγ decay rates

Author

A Lai, D Marras, J.R Batley, R.S Dosanjh, T.J Gershon, G.E Kalmus, C Lazzeroni, D.J Munday, E Olaiya, M.A Parker, T.O White, S.A Wotton, R Arcidiacono, G Barr, G Bocquet, A Ceccucci, T Cuhadar-Dönszelmann, D Cundy, N Doble, V Falaleev, L Gatignon, A Gonidec, B Gorini, P Grafström, W Kubischta, A Lacourt, I Mikulec, A Norton, B Panzer-Steindel, G Tatishvili, H Wahl, C Cheshkov, P Hristov, V Kekelidze, D Madigojine, N Molokanova, Yu Potrebenikov, A Zinchenko, V Martin, P Rubin, R Sacco, A Walker, M Contalbrigo, P Dalpiaz, J Duclos, P.L Frabetti, A Gianoli, M Martini, F Petrucci, M Savrié, A Bizzeti, M Calvetti, G Collazuol, G Graziani, E Iacopini, M Lenti, F Martelli, M Veltri, M Eppard, A Hirstius, K Holtz, K Kleinknecht, U Koch, L Köpke, P Lopes da Silva, P Marouelli, I Mestvirishvili, I Pellmann, A Peters, S.A Schmidt, V Schönharting, Y Schué, R Wanke, A Winhart, M Wittgen, J.C Chollet, L Fayard, L Iconomidou-Fayard, G Unal, I Wingerter-Seez, G Anzivino, P Cenci, E Imbergamo, P Lubrano, A Mestvirishvili, A Nappi, M Pepe, M Piccini, R Casali, C Cerri, M Cirilli, F Costantini, R Fantechi, L Fiorini, S Giudici, I Mannelli, G Pierazzini, M Sozzi, J.B Cheze, M De Beer, P Debu, F Derue, A Formica, R Granier de Cassagnac, G Gouge, G Marel, E Mazzucato, B Peyaud, R Turlay, B Vallage, M Holder, A Maier, M Ziolkowski, C Biino, N Cartiglia, F Marchetto, E Menichetti, N Pastrone, J Nassalski, E Rondio, M Szleper, W Wislicki, S Wronka, H Dibon, M Jeitler, M Markytan, G Neuhofer, M Pernicka, A Taurok, and L Widhalm

Subjects
Physics, Particle physics, Nuclear and High Energy Physics, Chiral perturbation theory, Large Hadron Collider, Branching fraction, decadimenti, Astrophysics::High Energy Astrophysical Phenomena, Detector, Intensity (physics), Gamma gamma, Nuclear physics, mesoni K, High Energy Physics::Experiment, Nuclear Experiment, Beam (structure)
Abstract

The KS → γγ decay rate has been measured with the NA48 detector using a high intensity short neutral beam from the CERN SPS. The measured branching ratio BR(KS → γγ) = (2.78 ± 0.06stat ± 0.04syst) x 10-6, obtained from 7461 ± 172 KS → γγ events, is significantly higher than the O(p4) prediction of chiral perturbation theory. Using a KL beam the ratio Γ(KL → γγ)/Γ(KL → π0π0π0) = (2.81 ± 0.02syst) ×10-3 has been measured. © 2002 Elsevier Science B.V. All rights reserved.

Published
2003

35. A precision measurement of direct CP violation in the decay of neutral kaons into two pions

Author

J.R Batley, R.S Dosanjh, T.J Gershon, G.E Kalmus, C Lazzeroni, D.J Munday, E Olaiya, M Patel, M.A Parker, T.O White, S.A Wotton, R Arcidiacono, G Barr, G Bocquet, A Ceccucci, T Cuhadar-Dönszelmann, D Cundy, N Doble, V Falaleev, L Gatignon, A Gonidec, B Gorini, P Grafström, W Kubischta, I Mikulec, A Norton, S Palestini, B Panzer-Steindel, D Schinzel, H Wahl, C Cheshkov, P Hristov, V Kekelidze, D Madigojine, N Molokanova, Yu Potrebenikov, A Zinchenko, P Rubin, R Sacco, A Walker, D Bettoni, R Calabrese, P Dalpiaz, J Duclos, P.L Frabetti, A Gianoli, M Martini, L Masetti, F Petrucci, M Savrié, M Scarpa, A Bizzeti, M Calvetti, G Collazuol, E Iacopini, M Lenti, F Martelli, G Ruggiero, M Veltri, D Coward, M Eppard, A Hirstius, K Holtz, K Kleinknecht, U Koch, L Köpke, P Lopes da Silva, P Marouelli, I Mestvirishvili, C Morales, I Pellmann, A Peters, B Renk, S.A Schmidt, V Schönharting, R Wanke, A Winhart, J.C Chollet, L Fayard, G Graziani, L Iconomidou-Fayard, G Unal, I Wingerter-Seez, G Anzivino, P Cenci, E Imbergamo, G Lamanna, P Lubrano, A Mestvirishvili, A Nappi, M Pepe, M Piccini, M Valdata-Nappi, R Casali, C Cerri, M Cirilli, F Costantini, R Fantechi, L Fiorini, S Giudici, I Mannelli, G Pierazzini, M Sozzi, J.B Cheze, M De Beer, P Debu, F Derue, A Formica, G Gouge, G Marel, E Mazzucato, B Peyaud, R Turlay, B Vallage, M Holder, A Maier, M Ziolkowski, C Biino, N Cartiglia, M Clemencic, F Marchetto, E Menichetti, N Pastrone, J Nassalski, E Rondio, W Wislicki, S Wronka, H Dibon, M Jeitler, M Markytan, G Neuhofer, M Pernicka, A Taurok, L Widhalm, Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), NA48, and Kerec, Hélène

Subjects
neutral kaon, Nuclear and High Energy Physics, Particle physics, [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], PREDICTION, direct CP violation, STANDARD MODEL, FOS: Physical sciences, neutral kaons, CP violation, epsilon'/epsilon parameter, mesoni K, decadimenti, violazione dretta dii CP, K meson, decay, 01 natural sciences, 7. Clean energy, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), Pion, 0103 physical sciences, EPSILON'/EPSILON, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], MESON SYSTEM, CRYSTAL, 010306 general physics, Physics, kaon decay, Large Hadron Collider, 010308 nuclear & particles physics, NA48 experiment, Yield (chemistry), High Energy Physics::Experiment, Particle Physics - Experiment
Abstract

The direct CP violation parameter Re(epsilon'/epsilon) has been measured from the decay rates of neutral kaons into two pions using the NA48 detector at the CERN SPS. The 2001 running period was devoted to collecting additional data under varied conditions compared to earlier years (1997-99). The new data yield the result: Re(epsilon'/epsilon) = (13.7 +/- 3.1) times 10^{-4}. Combining this result with that published from the 1997, 98 and 99 data, an overall value of Re(epsilon'/epsilon) = (14.7 +/- 2.2) times 10^{-4} is obtained from the NA48 experiment., Comment: 19 pages, 5 figures, to be published in Physics Letters B

Published
2002

36. New measurements of the η and K0 masses

Author

A. Lai, D. Marras, J.R. Batley, A.J. Bevan, R.S. Dosanjh, T.J. Gershon, G.E. Kalmus, C. Lazzeroni, D.J. Munday, E. Olaiya, M.A. Parker, T.O. White, S.A. Wotton, G. Barr, G. Bocquet, A. Ceccucci, T. Cuhadar-Dönszelmann, D. Cundy, G. D'Agostini, N. Doble, V. Falaleev, W. Funk, L. Gatignon, A. Gonidec, B. Gorini, G. Govi, P. Grafström, W. Kubischta, A. Lacourt, M. Lenti, I. Mikulec, A. Norton, S. Palestini, B. Panzer-Steindel, D. Schinzel, G. Tatishvili, H. Taureg, M. Velasco, H. Wahl, C. Cheskov, P. Hristov, V. Kekelidze, D. Madigojine, N. Molokanova, Yu. Potrebenikov, A. Zinchenko, V.J. Martin, P. Rubin, R. Sacco, A. Walker, D. Bettoni, R. Calabrese, M. Contalbrigo, P. Dalpiaz, J. Duclos, P.L. Frabetti, A. Gianoli, E. Luppi, M. Martini, L. Masetti, F. Petrucci, M. Savrié, M. Scarpa, A. Bizzeti, M. Calvetti, G. Collazuol, G. Graziani, E. Iacopini, F. Martelli, M. Veltri, H.G. Becker, M. Eppard, H. Fox, A. Hirstius, K. Holtz, A. Kalter, K. Kleinknecht, U. Koch, L. Köpke, P. Lopes da Silva, P. Marouelli, I. Mestvirishvili, I. Pellmann, A. Peters, S.A. Schmidt, V. Schönharting, Y. Schué, R. Wanke, A. Winhart, M. Wittgen, J.C. Chollet, L. Fayard, L. Iconomidou-Fayard, J. Ocariz, G. Unal, I. Wingerter-Seez, G. Anzivino, P. Cenci, E. Imbergamo, G. Lamanna, P. Lubrano, A. Mestvirishvili, A. Nappi, M. Pepe, M. Piccini, R. Casali, C. Cerri, M. Cirilli, F. Costantini, R. Fantechi, L. Fiorini, S. Giudici, I. Mannelli, G. Pierazzini, M. Sozzi, J.B. Cheze, J. Cogan, M. De Beer, P. Debu, F. Derue, A. Formica, G. Gouge, R. Granier de Cassagnac, G. Marel, E. Mazzucato, B. Peyaud, R. Turlay, B. Vallage, M. Holder, A. Maier, M. Ziolkowski, R. Arcidiacono, C. Biino, N. Cartiglia, R. Guida, F. Marchetto, E. Menichetti, N. Pastrone, J. Nassalski, E. Rondio, M. Szleper, W. Wislicki, S. Wronka, H. Dibon, M. Jeitler, M. Markytan, G. Neuhofer, M. Pernicka, A. Taurok, and L. Widhalm

Subjects
mass measurement, Physics, eta meson, Nuclear and High Energy Physics, Particle physics, Large Hadron Collider, NA48 EXPERIMENT, Physics::Instrumentation and Detectors, Detector, MESON, CERN, mesoni K, mesoni eta, massa mesoni, K meson, High Energy Physics - Experiment, High Energy Physics::Experiment, Nuclear Experiment, Particle Physics - Experiment
Abstract

New measurements of the $\eta$ and $K^0$ masses have been performed using decays to 3$\pi^0$ with the NA48 detector at the CERN SPS. Using symmetric decays to reduce systematic effects, the results $M(\eta) = 547.843\pm0.051$ MeV/c$^2$ and $M(K^0) = 497.625\pm0.031$ MeV/c$^2$ were obtained., Comment: 17 pages, 4 figures to be published in Physics Letters B

Published
2002

37. 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

38. A new measurement of the branching ratio of K(S) → γ γ

Author

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

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, mesoni K, decadimenti, Large Hadron Collider, Branching fraction, Detector
Abstract

The decay rate of KS → γγ has been measured with the NA48 detector at the CERN SPS. A total of 149 KS → γγ events have been observed. The branching ratio is determined to be (2.58±0.36(stat)±0.22(sys))×10−6.

Published
2000

40. Performance of an electromagnetic liquid krypton calorimeter based on a ribbon electrode tower structure

Author

G. Linser, Benedetto Gorini, W. Funk, L. Bertolotto, Lau Gatignon, J. Weterings, R. Fantechi, G.D. Barr, A. Givernaud, Sandro Palestini, P. Lubrano, M. Pepe, H. D. Wahl, J. Duclos, O. Vossnack, Cristina Biino, W. Seidl, F. Costantini, P.L. Frabetti, A. Gianoli, B. Peyaud, A. Gonidec, L. Gosset, Claudio Bruschini, B. Hallgren, J. Heitzmann, G. Kesseler, M. Sozzi, D.C. Cundy, P. Wertelaers, V. Marzulli, H. Taureg, C. Bocquet, A. Kalinin, Marco Martini, D. Schinzel, I. Mannelli, Peter Buchholz, Vladimir Kekelidze, Niels Doble, M. Savrie, A. Norton, Paolo Calafiura, V. Carassiti, O. Zeitnitz, M. Calvetti, C. Cerri, A. Ceccucci, D. Bederede, E. Mazzucato, A. Lacourt, R. Turlay, G. Laverrière, P Maas, P. Debu, Yu. Kozhevnikov, and M. Ziolkowski

Subjects
Physics, Nuclear and High Energy Physics, Large Hadron Collider, Calorimeter (particle physics), detector, fisica alte energie, Physics::Instrumentation and Detectors, Krypton, Resolution (electron density), NA48 experiment, chemistry.chemical_element, Nuclear physics, chemistry, Electrode, Calibration, CP violation, High Energy Physics::Experiment, Detectors and Experimental Techniques, Instrumentation
Abstract

The NA48 collaboration is preparing a new experiment at CERN aiming to study CP violation in the $K^{0}-K^{0}$ system with an accuracy of $2 \times 10^{−4}$ in the parameter $\Re(\epsilon'/\epsilon)$. Decays in two $\pi^{0}$'s will be recorded by a quasi-homogeneous liquid krypton calorimeter. A liquid krypton calorimeter has been chosen to combine good energy, position and time resolution with precise charge calibration and long-term stability. The prototype calorimeter incorporating the final design of the electrode read-out structure is presented in this paper. An energy resolution of $\simeq 3.5$%/$\sqrt{E}$ with a constant term smaller than 0.5% has been obtained. The time resolution was found to be better than 300 ps above 15 GeV.

Published
1996

41. ALEPH: a Detector for Electron-Positron Annihilations at LEP

Author

D. Decamp, B. Deschizeaux, J.-P. Lees, M.-N. Minard, J.M. Crespo, M. Delfino, E. Fernandez, M. Martinez, R. Miquel, L.I.M. Mir, S. Orteu, A. Pacheco, J.A. Perlas, E. Tubau, M.G. Catanesi, M. de Palma, A. Farilla, G. Iaselli, G. Maggi, A. Mastrogiacomo, S. Natali, S. Nuzzo, A. Ranieri, G. Raso, F. Romano, F. Ruggieri, G. Selvaggi, L. Silvestris, P. Tempesta, G. Zito, Y. Chen, H. Hu, D. Huang, Y. Jiang, J. Lin, R. Liu, W. Lu, T. Ruan, T. Wang, X. Wang, D. Wu, W. Wu, Y. Xie, D. Xu, R. Xu, Y. Xu, W. Yan, M. Ye, J. Zhang, H. Zhao, W. Zhao, H. Albrecht, A. Ball, F. Bird, E. Blucher, T. Charity, H. Drevermann, F. Dydak, M. Ferro-Luzzi, Ll. Garrido, C. Grab, R. Grub, R. Hagelberg, S. Haywood, B. Ivesdal, B. Jost, M. Kasemann, G. Kellner, J. Knobloch, A. Lacourt, P. Lazeyras, I. Lehraus, B. Lofstedt, T. Lohse, D. Lüke, A. Marchioro, P. Mato, J.M. Maugain, J. May, V. Mertens, A. Minten, A. Miotto, P. Palazzi, M. Pepe-Altarelli, R. Pintus, L. Pregernig, M. Price, F. Ranjard, J. Richstein, W. Richter, J. Rothberg, H. Rotscheidt, W. Von Rüden, R. St. Denis, P. Schilly, D. Schllater, G. Stefanini, M. Takashima, M. Talby, J.C. Tarle, H. Taureg, W. Tejessy, H. Verweij, H. Wachsmuth, H. Wahl, S. Wheeler, W. Witzeling, J. Wotschack, Z. Ajaltouni, M. Bardadin-Otwinowska, M. Brossard, R. Chadelas, F. Daudon, A. Falvard, P. Gay, P. Henrard, J. Jousset, B. Michel, J.-C. Montret, D. Pallin, P. Perret, J. Prat, J. Proriol, F. Prulhière, H. Bertelsen, F. Hansen, J.D. Hansen, J.R. Hansen, P.H. Hansen, A. Lindahl, B. Madsen, R. Møllerud, B.S. Nilsson, G. Petersen, E. Simopoulou, A. Vayaki, J. Badier, D. Bernard, M. Bercher, U. Berthon, A. Blondel, G. Bonneaud, J. Bourotte, F. Braems, J.C. Brient, A. Busata, M.A. Ciocci, Ph. Delcroz, G. Fouque, R. Guirlet, C. Lemoine, P. Matricon, M. Maubras, R. Morano, P. Miné, J.Y. Parey, P. Poilleux, A. Rougé, C. Roy, M. Rumpf, H. Videau, I. Videau, C. Violet, D. Zwierski, D.J. Candlin, A.J. Main, A. Conti, G. Parrini, E. Scarlini, W. Burley, M. Corden, C. Georgiopoulos, J.H. Goldman, M. Ikeda, J. Lannutti, D. Levinthal, M. Mermikides, L. Sawyer, A. Antonelli, R. Baldini, G. Bencivenni, G. Bologna, F. Bossi, P. Campana, G. Capon, V. Chiarella, G. Corradi, G. De Ninno, B. D'ettorre-Piazzoli, B. Dulach, G. Felici, P. Laurelli, G. Mannocchi, F. Murtas, G.P. Murtas, G. Nicoletti, M. Pallotta, P. Picchi, P. Zografou, B. Altoon, O. Boyle, A.J. Flavell, A.W. Halley, I. Ten Have, J.L. Hearns, I.S. Hughes, J.G. Lynch, D.J. Martin, R. O'neill, C. Raine, J.M. Scarr, K. Smith, A.S. Thompson, J. Wells, B. Brandl, O. Braun, R. Geiges, C. Geweniger, P. Hanke, V. Hepp, W. Heyde, E.E. Kluge, J. Krause, Y. Maumary, M. Panter, A. Putzer, B. Rensch, K. Schmitt, A. Stahl, K. Tittel, M. Wunsch, G.J. Barber, A.T. Belk, R. Beuselinck, D.M. Binnie, W. Cameron, M. Cattaneo, P.J. Dornan, S. Dugeay, R.W. Forty, D.N. Gentry, P. Heinson, M. MacDermott, D.G. Miller, D.R. Price, J.K. Sedgbeer, G. Taylor, A.P. White, P. Girtler, D. Kuhn, G. Rudolph, C.K. Bowdery, T.J. Brodbeck, A.J. Finch, F. Foster, G. Hughes, N.R. Keemer, M. Nuttall, B.S. Rowlingson, T. Sloan, S.W. Snow, T. Barczewski, L.A.T. Bauerdick, K. Kleinknecht, D. Pollmann, B. Renk, S. Roehn, M. Schmelling, K. Schmitz, F. Steeg, J-P. Albanese, J-J. Aubert, G. Barrand, R. Bazzoli, C. Benchouk, A. Bonissent, A. Ealet-Grousset, F. Etienne, Y. Gally, E. Kajfasz, R. Nacasch, P. Payre, B. Pietrzyk, J. Raguet, Z. Qian, H. Becker, W. Blum, T. Boulos, P. Cattaneo, M. Comin, G. Cowan, B. Dehning, H. Dietl, M. Fernandez-Bosman, D. Hauff, A. Jahn, E. Lange, G. Lütjens, G. Lutz, W. Männer, H-G. Moser, Y. Pan, R. Richter, A.S. Schwarz, R. Settles, U. Stiegler, U. Stierlin, G. Stimpfl, J. Thomas, G. Waltermann, G. Aioun, J.N. Albert, Ch. Arnault, G. De Bouard, J. Boucrot, O. Callot, R. Chase, A. Cordier, M. Davier, M. Dialinas, A. Ducorps, D. Fournier, G. Ganis, J.-F. Grivaz, Ph. Heusse, P. Janot, P. Jean, V. Journé, D.W. Kim, J. Lefrançois, D. Lloyd-Owen, A.M. Lutz, P. Marotte, J.J. Veillet, F. Zomer, S.R. Amendolia, G. Bagliesi, G. Batignani, A. Bechini, F. Bosi, L. Bosisio, U. Bottigli, C. Bradaschia, I. Ferrante, F. Fidecaro, L. Foa, E. Focardi, F. Forti, S. Galeotti, A. Giassi, M.A. Giorgi, F. Ligabue, A. Lusiani, E.B. Mannelli, P.S. Marrocchesi, A. Messineo, F. Palla, D. Passuello, G. Sanguinetti, S. Scapellato, J. Steinberger, R. Tenchini, G. Tonelli, G. Triggiani, J.M. Carter, B.J. Green, M.G. Green, A.K. McKemey, P.V. March, T. Medcalf, M.R. Saich, N.M. Stewart, J.A. Strong, R.M. Thomas, T. Wildish, E.H. Bellamy, J. Bizzel, D.R. Botterill, R.W. Clifft, I.F. Corbett, T.R. Edgecock, M. Edwards, J.S.M. Fisher, J. Harvey, D.L. Hill, E. Holtom, T.J. Jones, S. Madani Bozorg, G. McPherson, D.R. Moore, M. Morrissey, A. Nichols, P.R. Norton, D.P. Salmon, G.J. Tappern, J.C. Thompson, A. Tucker, R. Bernard, B. Bloch-Devaux, H. Desportes, J. Heitzmann, M. Jacquemet, A. Joudon, E. Locci, J.C. Lottin, S. Loucatos, P. Micolon, J. Pascual, B. Pignard, J. Rander, J.-F. Renardy, A. Roussarie, J.-P. Schuller, R. Turlay, J.G. Ashman, C.N. Booth, C. Buttar, R. Carney, S.L. Cartwright, F. Combley, M. Dinsdale, M. Dogru, F. Hatfield, J. Martin, D. Parker, P. Reeves, L.F. Thompson, S. Brandt, H. Burkhardt, G. Gillessen, C. Grupen, H. Meinhard, E. Neugebauer, M. Olpp, W.U. Otto, M. Roschangar, U. Schäfer, R. Seibert, H. Seywerd, K. Stupperich, L. Wurmbach, B. Gobbo, F. Liello, A. Mansutti, E. Milotti, F. Ragusa, L. Rolandi, L. Bellantoni, J.F. Boudreau, A. Caldwell, D. Cinabro, M. Convery, J.S. Conway, D.F. Cowen, Z. Feng, J.L. Harton, J. Hilgart, J. Izen, R.C. Jared, R.P. Johnson, B.W. LeClaire, T.C. Meyer, D. Muller, Y.B. Pan, T. Parker, J.R. Pater, S. Ritz, Y. Saadi, V. Sharma, D. Strom, J.A. Wear, F.V. Weber, E. Wicklund, Sau Lan Wu, S.T. Xue, G. Zobernig, Decamp, D, Deschizeaux, B, Lees, Jp, Minard, Mn, Crespo, Jm, Delfino, M, Fernandez, E, Martinez, M, Miquel, R, Mir, Lm, Orteu, S, Pacheco, A, Perlas, Ja, Tubau, E, Catanesi, Mg, Depalma, M, Farilla, A, Iaselli, G, Maggi, G, Mastrogiacomo, A, Natali, S, Nuzzo, S, Ranieri, A, Raso, G, Romano, F, Ruggieri, F, Selvaggi, G, Silvestris, L, Tempesta, P, Zito, G, Chen, Y, Hu, H, Huang, D, Jiang, Y, Lin, J, Liu, R, Lu, W, Ruan, T, Wang, T, Wang, X, Wu, D, Wu, W, Xie, Y, Xu, D, Xu, R, Xu, Y, Yan, W, Ye, M, Zhang, J, Zhao, H, Zhao, W, Albrecht, H, Ball, A, Bird, F, Blucher, E, Charity, T, Drevermann, H, Dydak, F, Ferroluzzi, M, Garrido, L, Grab, C, Grub, R, Hagelberg, R, Haywood, S, Ivesdal, B, Jost, B, Kasemann, M, Kellner, G, Knobloch, J, Lacourt, A, Lazeyras, P, Lehraus, I, Lofstedt, B, Lohse, T, Luke, D, Marchioro, A, Mato, P, Maugain, Jm, May, J, Mertens, V, Minten, A, Miotto, A, Palazzi, P, Pepealtarelli, M, Pintus, R, Pregernig, L, Price, M, Ranjard, F, Richstein, J, Richter, W, Rothberg, J, Rotscheidt, H, Vonruden, W, Stdenis, R, Schilly, P, Schlatter, D, Stefanini, G, Takashima, M, Talby, M, Tarle, Jc, Taureg, H, Tejessy, W, Verweij, H, Wachsmuth, H, Wahl, H, Wheeler, S, Witzeling, W, Wotschack, J, Ajaltouni, Z, Bardadinotwinowska, M, Brossard, M, Chadelas, R, Daudon, F, Falvard, A, Gay, P, Henrard, P, Jousset, J, Michel, B, Montret, Jc, Pallin, D, Perret, P, Prat, J, Proriol, J, Prulhiere, F, Bertelsen, H, Hansen, F, Hansen, Jd, Hansen, Jr, Hansen, Ph, Lindahl, A, Madsen, B, Mollerud, R, Nilsson, B, Petersen, G, Simopoulou, E, Vayaki, A, Badier, J, Bernard, D, Bercher, M, Berthon, U, Blondel, A, Bonneaud, G, Bourotte, J, Braems, F, Brient, Jc, Busata, A, Ciocci, Ma, Delcroz, P, Fouque, G, Guirlet, R, Lemoine, C, Matricon, P, Maubras, M, Morano, R, Mine, P, Parey, Jy, Poilleux, P, Rouge, A, Roy, C, Rumpf, M, Videau, H, Videau, I, Violet, C, Zwierski, D, Candlin, Dj, Main, Aj, Conti, A, Parrini, G, Scarlini, E, Burley, W, Corden, M, Georgiopoulos, C, Goldman, Jh, Ikeda, M, Lannutti, J, Levinthal, D, Mermikides, M, Sawyer, L, Antonelli, A, Baldini, R, Bencivenni, G, Bologna, G, Bossi, F, Campana, P, Capon, G, Chiarella, V, Corradi, G, Deninno, G, Dettorrepiazzoli, B, Dulach, B, Felici, G, Laurelli, P, Mannocchi, G, Murtas, F, Murtas, Gp, Nicoletti, G, Pallotta, M, Picchi, P, Zografou, P, Altoon, B, Boyle, O, Flavell, Aj, Halley, Aw, Tenhave, I, Hearns, Jl, Hughes, I, Lynch, Jg, Martin, Dj, Oneill, R, Raine, C, Scarr, Jm, Smith, K, Thompson, A, Wells, J, Brandl, B, Braun, O, Geiges, R, Geweniger, C, Hanke, P, Hepp, V, Heyde, W, Kluge, Ee, Krause, J, Maumary, Y, Panter, M, Putzer, A, Rensch, B, Schmitt, K, Stahl, A, Tittel, K, Wunsch, M, Barber, Gj, Belk, At, Beuselinck, R, Binnie, Dm, Cameron, W, Cattaneo, M, Dornan, Pj, Dugeay, S, Forty, Rw, Gentry, Dn, Heinson, Ap, Macdermott, M, Miller, Dg, Price, Dr, Sedgbeer, Jk, Taylor, G, White, Ap, Girtler, P, Kuhn, D, Rudolph, G, Bowdery, Ck, Brodbeck, Tj, Finch, Aj, Foster, F, Hughes, G, Keemer, Nr, Nuttall, M, Rowlingson, B, Sloan, T, Snow, Sw, Barczewski, T, Bauerdick, Lat, Kleinknecht, K, Pollmann, D, Renk, B, Roehn, S, Schmelling, M, Schmitz, K, Steeg, F, Albanese, Jp, Aubert, Jj, Barrand, G, Bazzoli, R, Benchouk, C, Bonissent, A, Ealetgrousset, A, Etienne, F, Gally, Y, Kajfasz, E, Nacasch, R, Payre, P, Pietrzyk, B, Raguet, J, Qian, Z, Becker, H, Blum, W, Boulos, T, Cattaneo, P, Comin, M, Cowan, G, Dehning, B, Dietl, H, Fernandezbosman, M, Hauff, D, Jahn, A, Lange, E, Lutjens, G, Lutz, G, Manner, W, Moser, Hg, Pan, Y, Richter, R, Schwarz, A, Settles, R, Stiegler, U, Stierlin, U, Stimpfl, G, Thomas, J, Waltermann, G, Aioun, G, Albert, Jn, Arnault, C, Debouard, G, Boucrot, J, Callot, O, Chase, R, Cordier, A, Davier, M, Dialinas, M, Ducorps, A, Fournier, D, Ganis, G, Grivaz, Jf, Heusse, P, Janot, P, Jean, P, Journe, V, Kim, Dw, Lefrancois, J, Lloydowen, D, Lutz, Am, Marotte, P, Veillet, Jj, Zomer, F, Amendolia, Sr, Bagliesi, G, Batignani, G, Bechini, A, Bosi, F, Bosisio, L, Bottigli, U, Bradaschia, C, Ferrante, I, Fidecaro, F, Foa, L, Focardi, E, Forti, F, Galeotti, S, Giassi, A, Giorgi, Ma, Ligabue, Franco, Lusiani, Alberto, Mannelli, Eb, Marrocchesi, P, Messineo, A, Palla, F, Passuello, D, Sanguinetti, G, Scapellato, S, Steinberger, J, Tenchini, R, Tonelli, G, Triggiani, G, Carter, Jm, Green, Bj, Green, Mg, Mckemey, Ak, March, Pv, Medcalf, T, Saich, Mr, Stewart, Nm, Strong, Ja, Thomas, Rm, Wildish, T, Bellamy, Eh, Bizzell, J, Botterill, Dr, Clifft, Rw, Corbett, If, Edgecock, Tr, Edwards, M, Fisher, Sm, Harvey, J, Hill, Dl, Holtom, E, Jones, Tj, Bozorg, Sm, Mcpherson, G, Moore, Dr, Morrissey, M, Nichols, A, Norton, Pr, Salmon, Dp, Tappern, Gj, Thompson, Jc, Tucker, A, Bernard, R, Blochdevaux, B, Desportes, H, Heitzmann, J, Jacquemet, M, Joudon, A, Locci, E, Lottin, Jc, Loucatos, S, Micolon, P, Pascual, J, Pignard, B, Rander, J, Renardy, Jf, Roussarie, A, Schuller, Jp, Turlay, R, Ashman, Jg, Booth, Cn, Buttar, C, Carney, R, Cartwright, Sl, Combley, F, Dinsdale, M, Dogru, M, Hatfield, F, Martin, J, Parker, D, Reeves, P, Thompson, Lf, Brandt, S, Burkhardt, H, Gillessen, G, Grupen, C, Meinhard, H, Neugebauer, E, Olpp, M, Otto, Wu, Roschangar, M, Schafer, U, Seibert, R, Seywerd, H, Stupperich, K, Wurmbach, L, Gobbo, B, Liello, F, Mansutti, A, Milotti, E, Ragusa, F, Rolandi, Luigi, Bellantoni, L, Boudreau, Jf, Caldwell, A, Cinabro, D, Convery, M, Conway, J, Cowen, Df, Feng, Z, Harton, Jl, Hilgart, J, Izen, J, Jared, Rc, Johnson, Rp, Leclaire, Bw, Meyer, Tc, Muller, D, Pan, Yb, Parker, T, Pater, Jr, Ritz, S, Saadi, Y, Sharma, V, Strom, D, Wear, Ja, Weber, Fv, Wicklund, E, Wu, Sl, Xue, St, Zobernig, G., Milotti, Edoardo, and Aleph, Collaboration

Subjects
Physics, Flexibility (engineering), Nuclear and High Energy Physics, Aleph, high-energy physics, Process modeling, Process (engineering), business.industry, Software development, LEP, Automation, particle detectors, Data acquisition, Detectors and Experimental Techniques, Software engineering, business, Enforcement, Instrumentation, particle detector
Abstract

Process-centred Software Engineering Environments (PSEE) are the most recent generation of environments supporting software development activities. Most of PSEE are based on mechanisms promoting enforcement and automation of process activities. In this kind of mechanisms the process models are prescribed in a detailed and complete way. But the experience shows that supporting processes is more concerned with the flexibility of guidance offered during the process performance than with enforcement of a collection of predefined process models. In this paper, we present a solution to support strategic processes in a PSEE by providing a flexible guidance during process enactment.

Published
1990

42. Study of the DecayKL→π±π0e∓ν¯(ν)

Author

B. Winstein, E. J. Ramberg, J. K. Okamitsu, P. Debu, R. Tschirhart, J. R. Patterson, Sunil Somalwar, M. Karlsson, Y. W. Wah, K. Stanfield, R. Turlay, Roland Winston, L. Gibbons, B. Vallage, M. Woods, G. J. Bock, G. Makoff, E. C. Swallow, V. Papadimitriou, H. Yamamoto, J. Enagonio, George D Gollin, B. Peyaud, Y. B. Hsiung, A. R. Barker, R. Coleman, T. Yamanaka, and R. A. Briere

Subjects
Physics, General Physics and Astronomy
Published
1995

43. First result on a new measurement of ε’/ε in the neutral-kaon system

Author

Patrick Jarry, R. Turlay, B. Winstein, M. Woods, T. Yamanaka, E. C. Swallow, K. Stanfield, P. Debu, G. J. Bock, J. R. Patterson, Y. B. Hsiung, B. Peyaud, R. J. Stefanski, Y. W. Wah, K. Nishikawa, Roland Winston, G. Grazer, J. K. Okamitsu, George D Gollin, R. Coleman, H. Yamamoto, and R. Daudin

Subjects
Nuclear physics, Physics, Particle decay, Particle physics, Pion, Meson, Hadron, Monte Carlo method, General Physics and Astronomy, CP violation, Elementary particle, Boson
Abstract

A new beam line and detector were constructed to increase statistical precision and greatly reduce systematic uncertainty on the ratio of the CP-nonconserving parameters epsilon'/epsilon. Major improve- ments are discussed together with a result from a first run: epsilon'/epsilon = 0.0032 +- 0.0028 (statistical) +- 0.0012 (systematic). The precision is better than earlier measurements yet the result is still consistent with the superweak mechanism (which predicts zero) and that due to Kobayashi and Maskawa. Significantly more data are being collected.

Published
1988

45. Study of some rare decays of the K+ meson

Author

L. Rosselet, N. Do-Duc, R. Sachot, O. Guisan, G. Marel, A.M. Diamant-Berger, R. Turlay, J. Fischer, P. Extermann, R. Mermod, P. Bloch, and B. Devaux

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Meson, Weak current, Lepton
Abstract

In a search for very rare decays of the K + meson we observed the K + → μ + ν e + e − and K + →e + ν e + e − modes with branching ratios of (10±3) ×10 −7 and (2 +2 −2 )×10 −7 respectively. We also put new limits on a decay allowed by the alternate scheme of lepton conservation K + → π − μ + e + , on a decay with double charged weak current K + → π − e + e + and on other forbidden decays K + → μ − ν e + e + and K + → π + μ ± e ± .

Published
1976

46. Measurement of the neutral to charged current cross section ratio in neutrino and antineutrino interactions

Author

D. Schlatter, R. Turlay, H. D. Wahl, B. Peyaud, M. Holder, A. Berthelot, K. Tittel, A. Savoy-Navarro, G. Spahn, H. J. Willutzki, J. Steinberger, C. Geweniger, S. Whitaker, H. Suter, Konrad Kleinknecht, V. Hepp, M. Grimm, J. Wotschack, P. Bloch, John Rander, J. Knobloch, E.G.H. Williams, F. Dydak, F. Ranjard, H.P. Paar, W. Dorth, Francesco Navarria, J. May, P. Palazzi, B. Devaux, J. Maillard, and F. Eisele

Subjects
Physics, Nuclear and High Energy Physics, Range (particle radiation), Particle physics, Neutral current, High Energy Physics::Phenomenology, Hadron, Nuclear physics, Cross section (physics), Narrow band, High Energy Physics::Experiment, Neutrino, Nuclear Experiment, Charged current, Particle Physics - Phenomenology
Abstract

The authors report on the analysis of inclusive neutral current events produced in neutrino and antineutrino narrow band beams. One finds for incident neutrino energies in the range 12-200 GeV and for hadron energies above 12 GeV a neutral charged current cross-section ratio of R/sub nu /=0.293+or-0.010 for incident neutrinos, and R/sub anti nu /=0.35+or-0.03 for antineutrinos. These ratios are consistent with the Weinberg-Salam model, with sin/sup 2/ theta /sub w/=0.24+or-0.02. (6 refs).

Published
1977

47. Total neutrino and antineutrino charged current cross section measurements in 100, 160, and 200 GeV narrow band beams

Author

M. Fiedler, John Rander, Joseph Rothberg, P. Palazzi, A. Grant, F. Eisele, N. Kurz, R. Belusević, J. P. Schuller, H. D. Brummel, A. Para, R. Geiges, H. Blümer, R. Turlay, B. Renk, H. D. Wahl, R. Hagelberg, Pablo Rodriguez Perez, J. Duda, P. Berge, B. Vallage, F. Ranjard, P. Debu, H. J. Meyer, H. Wachsmuth, P. Buchholz, F. Dydak, H. Taureg, A. Blondel, E. Müller, J. De Groot, Helmut Burkhardt, B. Pszola, B. Kampschulte, P. Böckmann, V. Hepp, H. Abramowicz, C. Geweniger, Jan Krolikowski, R. W. Williams, C. Guyot, Konrad Kleinknecht, B. Falkenburg, H. Keilwerth, Anna Lipniacka, J. P. Merlo, J. Knobloch, Boleslaw Wyslouch, Mieczyslaw Witold Krasny, Elliot Hughes, K. Tittel, J. Steinberger, J. Wotschack, and F. Perrier

Subjects
Physics, Nuclear reaction, Particle physics, Antiparticle, Muon, Physics and Astronomy (miscellaneous), Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, Nuclear Theory, Nuclear physics, Antimatter, High Energy Physics::Experiment, Neutrino, Nuclear Experiment, Nucleon, Engineering (miscellaneous), Particle Physics - Experiment, Charged current, Lepton
Abstract

Neutrino and antineutrino total charged current cross sections on iron were measured in the 100, 160, and 200 GeV narrow band beams at the CERN SPS in the energy range 10 to 200 GeV. Assuming σ/E to be constant, the values corrected for non-isoscalarity are σv/E = (0.686 ± 0.019) * 10−38 cm2/ (GeV · nucleon) and σv/E = (0.339 ± 0.010) * 10−38 cm2/ (GeV·nucleon). Between 50 and 150 GeV no energy dependence of σ/E was observed within ±3% for neutrino and ±4% for antineutrino interactions.

Published
1987

48. Study of inclusive neutral current interactions of neutrinos and antineutrinos

Author

P. Bloch, John Rander, J. May, M. Grimm, Francesco Navarria, J. Steinberger, Konrad Kleinknecht, D. Schlatter, Paolo Palazzi, A. Savoy-Navarro, H. J. Willutzki, H.P. Paar, H. D. Wahl, W. Dorth, B. Peyaud, J. Maillard, F. Eisele, E.G.H. Williams, F. Dydak, R. Turlay, K. Tittel, G. Spahn, F. Ranjard, B. Devaux, H. Suter, J. Knobloch, V. Hepp, C. Geweniger, S. Whitaker, M. Holder, and J. Wotschack

Subjects
Physics, Nuclear physics, Nuclear and High Energy Physics, Particle physics, Neutral current, Neutrino, Charged current
Abstract

We report on results from a study of hadron-energy distributions for ν and ν inclusive neutral current interactions. There is no significant variation of the neutral to charged current total cross-section ratios R ν and R ν with neutrino energy. The space-time structure of neutral currents is dominated by V − A , with a significant admixture of V + A . The Weinberg-Salam model is in agreement with all data if sin 2 θ w =0.24±0.02.

Published
1977

49. Measurement ofD*Production in Pion-Nucleon Interactions at 200 GeV/c

Author

Morgan May, G. Rinaudo, V. L. Fitch, R. Cester, R. Turlay, D. Maurizio, A. Montag, B. Devaux, P. Cavaglia, S. Sherman, R. C. Webb, Michael S. Witherell, A. Zylberstejn, and J. Teiger

Subjects
Nuclear physics, Physics, Particle decay, Particle physics, Pion, Meson, Q value, Hadron, General Physics and Astronomy, Elementary particle, Nucleon, Boson
Abstract

Results of an experiment to measure the cross section for production of the D*/sup +/(D*/sup -/) in 200-GeV/c r/sup -/N interactions are reported. 78 +- 26 events are observed, corresponding to a D* production cross section ds/dy = 1.6 +- 0.5 mb at y = 0.

Published
1981

50. Large planar drift chambers

Author

G. Tarte, J. Plancoulaine, Y. Malbequi, B. Devaux, A. Patoux, J. Pelle, P. Bloch, S. Brehin, R. Turlay, G. Marel, H. Martin, C. Leschevin, A.M. Diamant-Berger, and J. Maillard

Subjects
Physics, Nuclear physics, Planar, Physics::Instrumentation and Detectors, Hexagonal crystal system, Physics::Accelerator Physics, General Medicine, Neutrino, Mechanical construction, Nuclear Experiment
Abstract

We describe 14 m 2 hexagonal planar drift chambers designed for the neutrino experiment of the CERN-Dortmund-Heidelberg-Saclay Collaboration. Details on mechanical construction, electronic read-out, results on efficiency and accuracy are presented.

Published
1977

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