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15 results on '"F. J. Hasert"'

1. Analysis of nucleon structure functions in CERN bubble chamber neutrino experiments

Author

K. L. Wernhard, V. Baruzzi, H. Grässler, F. J. Hasert, P. Porth, K. J. Powell, P. Renton, W. Meincke, E. Pagiola, Th. Kokott, P. Grossmann, R. McGow, P. C. Bosetti, Ch. Peyrou, I. Butterworth, H. Emans, R. Pech, R. Pons, R. Hartmann, R. Beuselinck, B. Nellen, H. Deden, J. Figiel, B. Saitta, A. Keller, M. Deutschmann, Ch Geich-Gimbel, H. Wachsmuth, D. Vignaud, E. F. Clayton, K. Schultze, D. H. Perkins, A. Grant, M. Bloch, K. Böckmann, Y. Sacquin, P. O. Hulth, D. B. Miller, Luc Pape, J. Morfin, J. H. Mulvey, P. Fritze, W. Hart, G. Myatt, R. Schulte, B. Tallini, M. De Beer, D. R. O. Morrison, Peter Schmid, D. Haidt, C. L. Davis, Sanjoy Banerjee, W. G. Scott, D. Radojicic, H. Seyfert, D.C. Cundy, D. J. Kocher, and Keith W. J. Barnham

Subjects
Quark, Quantum chromodynamics, Physics, Nuclear and High Energy Physics, Particle physics, Muon, High Energy Physics::Phenomenology, Hadron, Gluon, Baryon, Nuclear physics, Gargamelle, High Energy Physics::Experiment, Nuclear Experiment, Nucleon
Abstract

We present results for the differential cross sections of neutrinos and antineutrinos on nucleons in the energy range E = 2−200 GeV, from the BEBC and Gargamelle experiments. The structure functions F2, 2χF1 and χF3 have been evaluated as a function of χ and q2. Deviations are observed from Bjorken scaling, which are very similar to those found in electron and muon inelastic scattering. For the Callan-Gross ratio, we find 2χF 1 F 2 = 0.80 ± 0.12 and the corresponding value for 〈R〉 = 〈 σ S σ T 〉 = 0.15 ± 0.10 . Our results are consistent with the Gross-Llewellyn-Smith sum rule; we measure ⩾2.5 ± 0.5 valence quarks per nucleon. Quark and antiquark distributions are given. The Nachtmann moments of F2 and χF3 are quantitatively consistent with the predictions from QCD. The value of the strong interaction parameter is λ = 0.74 ± 0.05 GeV without corrections, and 0.66 ± 0.05 GeV including αS2 corrections. The moments of the gluon distribution are found to be positive and indicate an χ distribution of gluons which is comparable with that of the valence quarks.

Published
1978
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2. Cross sections for neutrino and antineutrino neutral current interactions

Author

V. Stenger, P. Grossmann, H. Klein, R. McGow, D.C. Cundy, R. Pech, E. Pagiola, P. Porth, M. Deutschmann, R. Pons, I. Butterworth, Christoph Geich-Gimbel, J. H. Mulvey, E. F. Clayton, D. B. Miller, V. Peterson, K. Böckmann, P. Renton, R. Hartmann, G. Myatt, Y. Sacquin, A. Grant, B. Tallini, P. O. Hulth, H. Grässler, D. Radojicic, Ch. Peyrou, K. J. Powell, M. Bloch, B. Saitta, J. Figiel, H. Seyfert, R. Beuselinck, R. Schulte, H. Wachsmuth, H. Deden, D. Haidt, C. L. Davis, G. T. Jones, S. Banerjee, H. Emasn, W. G. Scott, D. J. Kocher, Keith W. J. Barnham, M. De Beer, Luc Pape, J. Morfin, D. H. Perkins, K. L. Wernhard, V. Baruzzi, P. C. Bosetti, W. Meincke, D. Vignaud, K. Schultze, B. Nellen, A. Keller, F. J. Hasert, T. P. Kokott, P. Fritze, W. Hart, D. R. O. Morrison, and Peter Schmid

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Neutral current, High Energy Physics::Phenomenology, Quark model, Hadron, Parton, Elementary particle, Spectral line, Nuclear physics, High Energy Physics::Experiment, Neutrino, Nuclear Experiment, Charged current
Abstract

The cross sections for ν and ν neutral current interactions for which the hadron energy is >15 GeV have been measured. These results, and the ratios of neutral current to charged current cross sections, are in agreement with the Weinberg-Salam model. Values of sin 2 θ W have been obtained both with and without the use of a parameterisation for the hadronic part of the interaction; the values are in good agreement with each other and the preferred result, that obtained by the method independent of hadronic models, is sin 2 θ W = 0.22 ± 0.05.

Published
1978
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3. Total cross sections for charged-current neutrino and antineutrino interactions in BEBC in the energy range 20–200 GeV

Author

P. Porth, H. Emans, D. J. Kocher, Keith W. J. Barnham, H. Weerts, K. Böckmann, F. J. Hasert, R. Beuselinck, P. Grossmann, D. Radojicic, T. P. Kokott, R. McGow, D. Haidt, J. Figiel, C. L. Davis, H. Wachsmuth, D. B. Miller, P. Renton, E. J. W. West, W. M. Allison, A. Grant, M. Bloch, I. Butterworth, V. Peterson, Christoph Geich-Gimbel, H. Grässler, E. Pagiola, G. Myatt, Luc Pape, J. Morfin, Ch. Peyrou, P. O. Hulth, P. Fritze, W. Hart, E. F. Clayton, K. J. Powell, M. Debeer, R. Schulte, R. Hartmann, D. H. Perkins, H. Deden, K. L. Wernhard, P. Schmitz, R. Pons, W. Meincke, S. Banerjee, J. Sacquin, D. R. O. Morrison, Peter Schmid, P. C. Bosetti, B. Tallini, J. H. Mulvey, R. Pech, M. Deutschmann, B. Nellen, A. Keller, D. Vignaud, K. Schultze, D.C. Cundy, B. Saitta, and H. Seyfert

Subjects
Quark, Physics, Nuclear and High Energy Physics, Range (particle radiation), Particle physics, Muon, High Energy Physics::Phenomenology, Inelastic scattering, Nuclear physics, Gargamelle, High Energy Physics::Experiment, Neutrino, Nuclear Experiment, Nucleon, Charged current
Abstract

The charged-current cross sections for neutrinos and antineutrinos on nucleons in the energy range 20–200 GeV are given. Taken in conjunction with the previous Gargamelle results, they show that σ E is almost constant with energy for antineutrinos, and falls with energy for neutrinos. The value of 〈q 2 〉 E decreases with energy for both neutrinos and antineutrinos, and these deviations from exact Bjorken scaling are consistent with those observed in electron and muon inelastic scattering. We find no evidence for new heavy quark states with right-handed coupling.

Published
1977
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4. ? 0 and? production in deep inelastic ?-p interactions at 280 GeV/c

Author

J. Favier, Uwe Pietrzyk, Michele Arneodo, M. Whalley, A. W. Edwards, J.M. Thenard, J. Figiel, H. Pessard, G. Berghoff, M. Pötsch, P. R. Norton, Geoffrey Taylor, P. Grafström, F. Combley, M. Maire, C. P. Bee, F. G. Oakham, P. Malecki, J. G. Loken, T. Dreyer, J. Gajewski, Hans Calén, G. Eszes, Jozsef Toth, W.S.C. Williams, Stephen Wimpenny, F. Janata, P. Payre, I. Derado, W. Mohr, G. Kellner, P. B. Renton, A. S. Johnson, E. M. Kabuss, H. E. Stier, M. Scheer, J. Haas, A. Schlagböhmer, T. Schröder, A. Sandacz, E. Nagy, H. Peschel, H. Brück, C. Broll, H.E. Montgomery, S. Dahlgren, Kr Long, B. Pietrzyk, M. Schouten, I. G. Bird, N. Schmitz, J. Gayler, G. Coignet, J. Drees, J. Ciborowski, G. Jancso, A. de la Torre, M. Studt, C. Benchouk, F. Dengler, M. Jaffre, L. Urban, D. Blum, J. S. Chima, J. Krüger, Joshua Thompson, Ulrich Landgraf, M. Schneegans, P. Ribarics, E. Rondio, A.M. Osborne, S. Kullander, G. D'Agostini, E. Böhm, W. Flauger, S. Wheeler, H. Schiemann, Gy. Wolf, J. Nassalski, M.I. Ferrero, R. W. Clifft, T. J. Sloan, B. Pönsgen, A. Manz, Silvia Maselli, R. Gamet, F. Grard, P.J. Hayman, K. Schultze, Cristiana Peroni, Roland Windmolders, J. J. Aubert, D. Lanske, C. Pascaud, A. Arvidson, Michael Düren, M. C. Edwards, F.W. Brasse, B. Pawlik, X. De Bouard, M. Scholz, J. Beaufays, Ph. Heusse, Jane Coughlan, V. Eckardt, W. Wallucks, J. Foster, E. Gabathuler, E. Hagberg, N. Geddes, T. Ernst, K. Rith, B. Badelek, F. Montanet, S.C. Brown, A. Jacholkowska, J. Pettingale, V. Korbel, F. J. Hasert, and H. M. Braun

Subjects
Nuclear physics, Physics, High energy, Physics and Astronomy (miscellaneous), Spin states, Meson, Isospin, Nuclear Theory, Density of states, Production (computer science), Space (mathematics), Engineering (miscellaneous), Pseudoscalar meson
Abstract

Inclusive distributions of ρ0 and ω mesons have been measured in deep inelastic μ-p interactions at 280 GeV/c. A comparison of the ρ0 cross sections with other leptoproduction experiments is presented. The ω results represent the first observation of this inclusive channel in high energy leptoproduction. The ρ0 and ω yields are found to be equal as may be expected from the available density of states in isospin space. This contrasts with spin angular momentum where the vector to pseudoscalar meson ratio is suppressed relative to the available number of spin states.

Published
1986
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5. Hadron production in charged current neutrino and antineutrino interactions at high energy

Author

F. J. Hasert, T. P. Kokott, R. Beuselinck, H. Seyfert, D. J. Kocher, S. J. Chima, Keith W. J. Barnham, P. Renton, M. Deutschman, K. L. Wernhard, V. Baruzzi, B. Saitta, R. Schulte, D. Haidt, C. L. Davis, W. Meincke, R. Hartmann, S. Banerjee, P. C. Bosetti, V. Stenger, Christoph Geich-Gimbel, G. Myatt, D. Vignaud, D. B. Miller, W. G. Scott, V. Peterson, D. R. O. Morrison, E. F. Clayton, K. Schultze, Luc Pape, J. Morfin, R. Künne, H. Emans, Peter Schmid, G. Heilmann, H. Deden, P. Grossmann, B. Nellen, D. H. Perkins, R. McGow, A. Keller, J. H. Mulvey, B. Tallini, P. Porth, D. Radojicic, P. Fritze, W. Hart, M. Bloch, G. T. Jones, A. Vayaki, J. Figiel, K. J. Powell, H. Wachsmuth, E. Simopoulou, H. Grässler, D.C. Cundy, Ch. Peyrou, I. Butterworth, R. Pech, A. Grant, R. Pons, Y. Sacquin, P. O. Hulth, M. De Beer, E. Pagiola, and K. Böckmann

Subjects
Physics, Quark, Quantum chromodynamics, Nuclear and High Energy Physics, Particle physics, High Energy Physics::Lattice, Nuclear Theory, High Energy Physics::Phenomenology, Quark model, Hadron, Parton, Nuclear physics, High Energy Physics::Experiment, Neutrino, Nuclear Experiment, Nucleon, Charged current
Abstract

The general features of hadrons produced in charged current interaction of high-energy neutrinos on nucleons are shown to be basically consistent with the idea of quark fragmentation within the framework of the quark parton model. However, many of the effects observed are shown also to follow from longitudinal phase space. Evidence is presented for a rise in 〈pT2〉 with Q2 in qualitative agreement with the predictions of quantum chromodynamics (QCD).

Published
1979
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6. The structure of the weak neutral current: An analysis of the hadronic energy distribution from neutrino and antineutrino interactions

Author

D. R. O. Morrison, Peter Schmid, Luc Pape, J. Morfin, D. Radojicic, R. Hartmann, D. H. Perkins, P. Renton, B. Saitta, Christoph Geich-Gimbel, P. Porth, R. Pech, R. Pons, D. Haidt, C. L. Davis, D. B. Miller, P. Fritze, M. Deutschmann, D. J. Kocher, Keith W. J. Barnham, V. Peterson, D. Vignaud, H. Seyfert, P. Grossmann, V. Stenger, H. Emans, R. McGow, R. Schulte, B. Tallini, K. Schultze, K. J. Powell, M. Bloch, H. Deden, W. G. Scott, B. Nellen, E. F. Clayton, A. Keller, A. Grant, K. L. Wernhard, H. Grässler, V. Baruzzi, J. H. Mulvey, Ch. Peyrou, E. Pagiola, D.C. Cundy, J. Figiel, H. Wachsmuth, G. Myatt, R. Beuselinck, F. J. Hasert, T. P. Kokott, Y. Sacquin, and P. O. Hulth

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Energy distribution, Neutral current, Physics::Instrumentation and Detectors, High Energy Physics::Phenomenology, Hadron, Scalar (physics), Neutrino beam, Nuclear physics, High Energy Physics::Experiment, Neutrino, Nuclear Experiment, Neutrino oscillation
Abstract

An analysis is presented of the distribution of hadronic energy in neutrino and antineutrino neutral current interactions occurring in BEBC, filled with a neon-hydrogen mixture and exposed to the CERN-SPS narrow-band neutrino beam. This shows that the contributions by scalar or pseudo-scalar forms of the interaction are consistent with zero and pure V, A and V + A are excluded; there is good agreement with the Weinberg-Salam model.

Published
1979
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7. Experimental study of structure functions and sum rules in charge-changing interactions of neutrinos and antineutrinos on nucleons

Author

L. Jauneau, W. Venus, G. Myatt, W.G. Scott, A.G. Michette, D. Lanske, W. Krenz, L. Kluberg, F. J. Hasert, H. Weerts, V. Brisson, M. Haguenauer, Bernard Aubert, J.B.M. Pattison, T.W. Jones, Pierre Vilain, J. Gandsman, M. Rollier, S. Natali, P. Petiau, S. Bonetti, H. Deden, J. McKenzie, D.C. Cundy, L.M. Chounet, D.H. Perkins, D. Haidt, J. Morfin, J. von Krogh, U. Nguyen-Khac, E. Bellotti, C. Pascaud, J. Sacton, Ph. Heusse, C. Franzinetti, C. Longuemare, Donatella Cavalli, H. Wachsmuth, D. Degrange, M.J. Esten, K. Schultze, A. Rousset, C. Conta, W. Van Doninck, J.P. Vialle, F. W. Bullock, E. Fiorini, A.M. Lutz, M. Jaffre, Alberto Pullia, and G. Bertrand-Coremans

Subjects
Physics, Quark, Nuclear physics, Nuclear and High Energy Physics, Antiparticle, Particle physics, Quark model, Parton, Charge (physics), Neutrino, Nucleon, Electric charge
Published
1975
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8. The Bose-Einstein correlations in deep inelastic ?p interactions at 280 GeV

Author

G. Eszes, F. Combley, M. Maire, E. Böhm, G. Kellner, H. M. Braun, B. Pietrzyk, S. Wheeler, Gy. Wolf, J. Nassalski, B. Pönsgen, J. Favier, Joshua Thompson, J. Figiel, F. G. Oakham, F.W. Brasse, V. Eckardt, M. Schneegans, F. Montanet, H. E. Stier, G. Berghoff, C. Benchouk, H. Peschel, J. G. Loken, G. D'Agostini, Stephen Wimpenny, J. Beaufays, F. J. Hasert, Ph. Heusse, F. Janata, P. Payre, J. J. Aubert, I. Derado, J. Ciborowski, L. Urban, P. Grafström, M.I. Ferrero, P.J. Hayman, X. De Bouard, Hans Calén, K. Rith, A. Manz, Silvia Maselli, T. Schröder, W. Mohi, A. S. Johnson, J. Gajewski, A. Sandacz, C. Pascaud, Geoffrey Taylor, R. Cliftt, J. Drees, F. Grard, M. Pötsch, Kr Long, D. Blum, I. G. Bird, M. Scheer, F. Dengler, Jozsef Toth, E. Rondio, J. S. Chima, G. Coignet, M. Jaffre, R. Gamet, S.C. Brown, Jane Coughlan, M. Schouten, J. Haas, C. P. Bee, Ulrich Landgraf, L. S. Osborne, E. Hagberg, G. Jancso, P. Malecki, B. Pawlik, P. B. Renton, W. Flauger, A. de la Torre, M. Studt, H. Pessard, M. C. Edwards, A. Jacholkowska, H. Schiemann, E. M. Kabuss, K. Schultze, J. Pettingale, D. Lanske, H. Brück, J. Krüger, E. Nagy, S. Dahlgren, A.M. Osborne, S. Kullander, N. Schmitz, T. J. Sloan, W. Wallucks, E. Gabathuler, J. Foster, V. Korbel, Cristiana Peroni, T. Ernst, B. Badelek, Roland Windmolders, A. Arvidson, Michael Düren, T. Dreyer, M. Sholz, A. Schlagböhmer, P. Ribarics, W.S.C. Williams, Michele Arneodo, A. W. Edwards, J.M. Thenard, M. Whalley, P. R. Norton, C. Broll, H.E. Montgomery, J. Gayler, and N. Geddes

Subjects
Physics, Particle physics, Physics and Astronomy (miscellaneous), Nuclear Theory, Charge (physics), Astrophysics::Cosmology and Extragalactic Astrophysics, Bose–Einstein correlations, Radius, Rest frame, Nuclear physics, Pion, Mass spectrum, High Energy Physics::Experiment, Astrophysics::Earth and Planetary Astrophysics, Nuclear Experiment, Engineering (miscellaneous), Parametrization, Particle Physics - Experiment
Abstract

The Bose-Einstein correlation has been observed for pions in deep inelastic μp interactions at 280 GeV. The importance of non-interference correlations in the sample of like charge pion pairs and in the sample used for reference is discussed. The pion emission region is found to be roughly spherical in the pair rest frame with a radius of 0.46–0.84 fm and the chaos factor λ is 0.60–1.08.

Published
1986
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9. Measurement of the neutrino-nucleon and antineutrino-nucleon total cross sections

Author

V. Brisson, M. Jaffre, W.G. Scott, E. Fiorini, S. Kabe, H. Wachsmuth, A. Rousset, W. Venus, W. Van Doninck, J.P. Vialle, C. Pascaud, C. Conta, T.W. Jones, J. McKenzie, H. Faissner, P. Petiau, S. Bonetti, J. Sacton, P. Musset, G. Myatt, E. Bellotti, J. von Krogh, S. Natali, K. Schultze, M.J. Esten, W. Krenz, Pierre Vilain, F. J. Hasert, D.C. Cundy, A.G. Michette, J.B.M. Pattison, T. Eichten, M. Rollier, B. Degrange, U. Nguyen-Khac, Bernard Aubert, L.M. Chounet, M. Derrick, M. Haguenauer, L. Kluberg, D.H. Perkins, D. Haidt, A. Pullia, P. Heusse, C. Franzinetti, A.M. Lutz, J. Morfin, G. Bertrand-Coremans, L. Jauneau, F. W. Bullock, and Donatella Cavalli

Subjects
Physics, Nuclear physics, Nuclear and High Energy Physics, Particle physics, Gargamelle, Hadron, Charge (physics), Neutrino, Nucleon, Scaling, Symmetry (physics), Charged current
Abstract

The v and v nucleon total cross-sections have been determined as a function of energy using a sample of 2500 v and 950 v event. The results are compared with predictions of scaling and charge symmetry hypotheses.

Published
1973
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10. Search for elastic muon-neutrino electron scattering

Author

H. Weerts, A. Lagarrigue, C. Conta, F. J. Hasert, J.B.M. Pattison, M. Rollier, G. Myatt, M. Jaffre, J. Sacton, W. Venus, L. Kluberg, James Pinfold, H. Wachsmuth, V. Brisson, M. Haguenauer, E. Bellotti, J. McKenzie, Bernard Aubert, Pierre Vilain, J. von Krogh, C. Baltay, A. Rousset, E. Fiorini, D.H. Perkins, B. Degrange, D. Lanske, L.M. Chounet, A. Pullia, S. Bonetti, Donatella Cavalli, M.J. Esten, P. Musset, P. Heusse, W.G. Scott, W. Krenz, A.G. Michette, Jacques Lemonne, F. W. Bullock, W. Van Doninck, J.P. Vialle, T.W. Jones, G. Bertrand-Coremans, D. Haidt, A.M. Lutz, J. Morfin, K. Schultze, D.C. Cundy, U. Nguyen-Khac, S. Natali, H. Faissner, and P. Petiau

Subjects
Nuclear physics, Physics, Scattering cross-section, Elastic scattering, Nuclear and High Energy Physics, Particle physics, Gargamelle, Muon neutrino, Weinberg angle, Electron scattering, Event (particle physics)
Abstract

One possible event of the process ν − μ + e − → v − μ + e − has been observed. The various background processes are discussed and the event interpreted in terms of the Weinberg theory. The 90% confidence limits on the Weinberg parameter are 0.1 2 θ W

Published
1973
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11. Charge and transverse momentum correlations in deep inelastic muon-proton scattering

Author

J. Krüger, M. Whalley, M. Pötsch, F. Dengler, A.M. Osborne, S. Kullander, J. S. Chima, Hans Calén, B. Poensgen, J. Favier, T. J. Sloan, P. Malecki, H. Hruck, J. Pettingale, I. Derado, F. Grard, A. S. Johnson, W. Mohr, Silvia Maselli, I. G. Bird, G. Coignet, Jozsef Toth, C. Pascaud, J. G. Loken, Cristiana Peroni, Christopher Bee, Roland Windmolders, H. E. Stier, E. Böhm, W. Flauger, A. Arvidson, M. Jaffre, Michael Düren, P.J. Hayman, M.I. Ferrero, M. Scholz, G. Kellner, P. Grafström, F. Janata, P. Payre, J. J. Aubert, J. Figiel, F. G. Oakham, H. Pessard, M. Scheer, Michele Arneodo, P. Ribarics, S.C. Brown, W.S.C. Williams, F. Combley, M. Maire, R. Gamet, A. W. Edwards, F. J. Hasert, X. De Bouard, G. Jancso, J. Ciborowski, G. D' Agostini, J.M. Thenard, A. Jacholkowska, J. Beaufays, L. Urban, M. Schouten, P. R. Norton, M. Adwards, B. Pietrzyk, E. M. Kabuss, Ph. Heusse, Ulrich Landgraf, J. Foster, Joshua Thompson, S. Wheeler, G. Berghoff, J. Coughlan, F.W. Brasse, A. de la Torre, J. Nassalski, M. Studt, M. Schneegans, A. Manz, G. Eszes, C. Benchouk, A. Schlagböhmer, Gy. Wolf, N. Geddes, C. Broll, H.E. Montgomery, P. B. Renton, Geoffrey Taylor, E. Hagberg, E. Gabathuler, T. Dreyer, V. Korbel, J. Gayler, T. Ernst, B. Badelek, J. Haas, V. Eckardt, N. Schmitz, H. Schiemann, W. Wallucks, K. Schultze, Stephen Wimpenny, D. Lanske, T. Schröder, Kr Long, J. Gajewski, E. Nagy, D. Blurn, S. Dahlgren, R. W. Clifft, H. M. Braun, J. Drees, B. Pawlik, E. Rondio, F. Montanet, and K. Rith

Subjects
Physics, Muon, Physics and Astronomy (miscellaneous), Scattering, Hadron, Virtual particle, Elementary particle, Hadronization, Nuclear physics, High Energy Physics::Experiment, Rapidity, Decay product, Atomic physics, Nuclear Experiment, Engineering (miscellaneous), Particle Physics - Experiment
Abstract

Correlations between charged hadrons are investigated in a 280 GeV muon-proton scattering experiment. Although most of the observed particles are decay products it is shown that the correlations found originate in the fragmentation process and are not due simply to resonance production. Correlations are demonstrated between hadrons close in rapidity with respect to their charges and to the directions of their momentum components perpendicular to the virtual photon axis. Such short range correlations are predicted by the standard hadronization models.

Published
1986

12. Limits on the mass and lifetime of long-lived heavy neutral leptons

Author

M. Brini-Penzo, Frederick W. Bullock, H. Faissner, Jacques Lemonne, Donatella Cavalli, Donald H. Perkins, T.W. Jones, C. Conta, M. J. Esten, G. Myatt, W. Venus, Alan Michette, W.F. Fry, A. Rousset, M. Haguenauer, D.C. Cundy, S. Bonetti, F. J. Hasert, D. Haidt, C.A. Ramm, S. Kabe, J. Morfin, J.B.M. Pattison, H. Wachsmuth, Ettore Fiorini, Enrico Bellotti, Alberto Pullia, U. Nguyen-Khac, Wulf Dieter Krenz, K. Schultze, J. McKenzie, J. von Krogh, J. Sacton, Sergio Natali, Pierre Vilain, B. Degrange, C. Comber, and Girod, Dominique

Subjects
Physics, Nuclear and High Energy Physics, Large Hadron Collider, [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], Physics::Instrumentation and Detectors, law.invention, Nuclear physics, Cross section (physics), law, Gargamelle, Physics::Accelerator Physics, Beam dump, Neutrino, Lepton
Abstract

A beam dump experiment was performed in the CERN Gargamelle neutrino facility in order to look for new heavy penetrating neutral particles. Limits are determined for the mass and lifetimes of such particles, and also the cross section for their production.

Published
1976

13. Strange particle production by neutral currents in the Gargamelle neutrino and antineutrino experiments

Author

A.G. Michette, C. Pascaud, A. Blondel, E. Fiorini, J. Morfin, F. J. Hasert, B. Degrange, J.B.M. Pattison, E. Bellotti, S. Bonetti, M. Rollier, A. Pullia, D. Blum, Maurice Haguenauer, P. Van Dam, F. Romano, T. Francois, J. Sacton, Ph. Heusse, C. Matteuzzi, F. W. Bullock, Donatella Cavalli, U. Nguyen-Khac, G. Bertrand-Coremans, A.M. Lutz, 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), GARGAMELLE, and Starita, Sabine

Subjects
Quark, Physics, Nuclear and High Energy Physics, Strange quark, Particle physics, [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], Neutral current, Physics::Instrumentation and Detectors, 010308 nuclear & particles physics, Nuclear Theory, Quark model, Elementary particle, 01 natural sciences, Nuclear physics, Gargamelle, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Neutrino, Nuclear Experiment, 010306 general physics, Nucleon
Abstract

The production rates of strange particles in pairs via neutral currents in ν and ν reactions have been measured in the “Garmelle” freon experiment. An upper limit for the fraction of the nucleon momentum carried is also given.

Published
1978

14. Di-lepton events in the BEBC narrow-band beam neutrino experiment

Author

D. Radojicic, B. Saitta, R. Hartmann, Christoph Geich-Gimbel, P. Porth, R. Schulte, E. Pagiola, S. Banerjee, H. Grässler, D. Haidt, D.C. Cundy, D. Kirch, P. Schmitz, C. L. Davis, E. J. W. West, M. Debeer, P. C. Bosetti, T. Vignaud, Ch. Peyrou, M. Bloch, P. Fritze, W. Hart, Y. Sacquin, I. Butterworth, P. Grossmann, D. J. Kocher, Keith W. J. Barnham, P. O. Hulth, H. Emans, R. McGow, K. Böckmann, D. B. Miller, V. Peterson, Luc Pape, J. Morfin, H. Deden, F. J. Hasert, A. Grant, D. R. O. Morrison, Peter Schmid, G. Myatt, T. P. Kokott, D. H. Perkins, K. J. Powell, R. Beuselinck, J. Figiel, J. H. Mulvey, H. Wachsmuth, P. Renton, B. Tallini, K. L. Wernhard, V. Baruzzi, W. Meincke, Luciano Barone, R. Pech, R. Pons, E. F. Clayton, B. Nellen, A. Keller, and H. Seyfert

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Narrow band, Analytical chemistry, Neutrino beam, Neutrino, Multiplicity (chemistry), Particle Physics - Experiment, Lepton
Abstract

In film taken with BEBC filled with a Ne(74%mol)/H 2 mixture and exposed to the CERN narrow-band neutrino beam (200 GeV), tenμ − μ + , one μ − μ + μ − and five μ − e + events were found in the ν exposure and two μ + μ − events and one μ + e − event in the ν exposure. Assuming the same production mechanism for μμ and μe events, the relative rates, corrected for identification inefficiency and background, can be combined and are (1.3 ± 0.4)% for (μ − e + + μ − μ + )/μ − in neutrino interactions, and (1.2 ± 0.5)% for (μ + e − + μ + μ − )/μ + antineutrino interactions. Eight out of the sixteen μ − l + events have a V 0 , leading to a corrected K 0 -multiplicity of 1.7 ± 0.7. No evidence is found for heavy-lepton production.

Published
1977

15. Observation of neutrino-like interactions without muon or electron in the Gargamelle neutrino experiment

Author

E. Fiorini, W. Venus, H. Wachsmuth, A.G. Michette, C. Conta, G. Myatt, R.B. Palmer, A.M. Lutz, S. Natali, M.J. Esten, A. Pullia, J. Morfin, U. Nguyen-Khac, F. J. Hasert, W. Krenz, J. Sacton, G. Bertrand-Coremans, P. Heusse, J.B.M. Pattison, D. Haidt, A. Lagarrigue, D. Blum, M. Rollier, Bianca Osculati, W.G. Scott, V. Brisson, P. Petiau, A. Rousset, Bernard Aubert, D.C. Cundy, R. Baldi, S. Bonetti, D. Lanske, M. Haguenauer, K. Schultze, E. Belotti, L.M. Chounet, W. Van Doninck, J.P. Vialle, D.H. Perkins, J. McKenzie, T.W. Jones, P. Musset, J. von Krogh, W.F. Fry, I. Danilchenko, H. Weerts, S. Kabe, D. Cavalli, U. Camerini, F. W. Bullock, L. Kluberg, Pierre Vilain, B. Degrange, and A. Orkin-Lecourtois

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Muon, Neutral current, Physics::Instrumentation and Detectors, Electron, Solar neutrino problem, Massless particle, Nuclear physics, Antimatter, Gargamelle, High Energy Physics::Experiment, Neutrino, Neutrino oscillation, Nuclear Experiment, Charged current, Lepton
Abstract

Events induced by neutral particles and producing only hadrons, but no muon or electron, have been observed in the heavy liquid bubble chamber Gargamelle exposed to neutrino (v) and antineutrino ( v ) beams at CERN. A study of the various sources which could give rise to such events reveals that less than 20% could be attributed to neutrons or KL°. The events behave as expected if they arise from neutral current processes induced by neutrinos and antineutrinos. The ratio of the number of these events to the number of corresponding events with charged lepton is 0.22 ± 0.04 for v and 0.43 ± 0.12 for v .

Published
1974

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