102 results on '"Jean Sacton"'
Search Results
52. A determination of the Λ-nuclear potential well-depth
- Author
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P.V. March, V.A. Bull, Jean Sacton, Jacques Lemonne, J.E. Allen, P. Allen, C. Mayeur, Dudley Davis, Pierre Vilain, D. Stanley, E.R. Fletcher, A.P. Conway, M.A. Shaukat, D.A. Garbutt, and Gaston Wilquet
- Subjects
Nuclear physics ,Physics ,Nuclear reaction ,Particle decay ,General Physics and Astronomy ,Nuclear binding energy ,Atomic physics ,Nucleon - Published
- 1965
- Full Text
- View/download PDF
53. K− meson capture by nuclei and the existence of a neutron halo in heavy nuclei
- Author
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E.H.S. Burhop, Jean Sacton, G. Schorochoff, and Dudley Davis
- Subjects
Nuclear physics ,Physics ,Nuclear reaction ,Nuclear and High Energy Physics ,Meson ,Nuclear Theory ,r-process ,Halo nucleus ,Neutron ,Nuclear drip line ,Nuclear Experiment ,s-process ,Nuclear density - Abstract
The evidence concerning the region of the nucleus in which the capture of K − mesons in K mesonic atoms predominantly occurs is re-examined in the light of a recent criticism. It is concluded that capture in the extreme peripheral region where the nuclear density is of the order of 5 per cent of the the central density and the existence of a neutron halo in heavy nuclei remain the most probable interpretation of the available data.
- Published
- 1969
- Full Text
- View/download PDF
54. An investigation of the range-energy relation in emulsion
- Author
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A. Filipkowski, E. Skrzypczak, D. Stanley, C. Mayeur, Dudley Davis, J.E. Allen, Jean Sacton, John H. Wickens, U. Krecker, F. Esmael, and G. Bohm
- Subjects
Condensed Matter::Soft Condensed Matter ,Nuclear physics ,Systematic error ,Physics::Instrumentation and Detectors ,Chemistry ,Nuclear Theory ,Soft sign ,High Energy Physics::Experiment ,Nuclear Experiment - Abstract
An apparent variation of the mass of the Λ-hyperon with the energy of the decay π--meson has been observed in emulsion. This anomaly has been attributed to a systematic error in the range-energy relation for emulsion for particle velocities greater than 0.6 c. © 1970 Societa Italiana di Fisica.
- Published
- 1970
- Full Text
- View/download PDF
55. A study of final state interactions in the mesonic decay of mass 4 hypernuclei
- Author
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V.A. Bull, E.R. Fletcher, Gaston Wilquet, D.H. Davis, W. Gajewski, P.V. March, Pierre Vilain, J.E. Allen, D. Stanley, A.P. Conway, and Jean Sacton
- Subjects
Nuclear physics ,Physics ,Nuclear Theory ,General Physics and Astronomy ,High Energy Physics::Experiment ,State (functional analysis) ,Atomic physics ,Nuclear Experiment ,Nucleon - Abstract
The results of a search for the presence of sharp resonances in systems of four nucleons produced as a result of various π ± mesonic decay modes of the hypernuclei ∧ 4 H and ∧ 4 He are presented.
- Published
- 1966
- Full Text
- View/download PDF
56. Is a Λ7Li hyperisomer possible?
- Author
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Zdzisław Szymański, Jean Sacton, Jacek Pniewski, and Dudley Davis
- Subjects
Physics ,Nuclear and High Energy Physics ,Excited state ,Isotopes of lithium ,Tensor ,State (functional analysis) ,Atomic physics ,Nucleon - Abstract
The possibility of the existence of an isomeric state of Λ 7 Li is considered. The conclusion appears to depend crucially on the energy of the excited state 5 2 + of Λ 7 Li. If only the spin-dependent central Λ-N forces are taken into account to explain the splitting of the states in hypernuclei then different values of parameter Δ for different states have to be considered. Tensor and spin-orbit forces might contribute to the explanation of the apparent changes of Δ for different p-shell hypernuclei in their ground and excited states.
- Published
- 1967
- Full Text
- View/download PDF
57. The π+-mesonic decays of hypernuclei
- Author
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P. Allen, A.P. Conway, E.R. Fletcher, Gaston Wilquet, Daniel O'Sullivan, V.A. Bull, P.V. March, J.E. Allen, Dudley Davis, Pierre Vilain, Jean Sacton, D.A. Garbutt, C. Mayeur, and D. Stanley
- Subjects
Nuclear physics ,Physics ,Particle physics ,Nuclear Theory ,High Energy Physics::Experiment ,Nuclear emulsion ,Nuclear Experiment ,Hypernucleus - Abstract
In a sample of approximately 11 000 hypernuclei obtained from K−-meson captures at rest in nuclear emulsion, eleven examples of the π+-mesonic decay of hypernuclei have been observed. From the ten which are attributed to the decay of4HeΛ, a value of (9±3)% is obtained forR, the ratio of π+ to π− mesonic decays for this hypernucleus. This result is larger than both that previously found experimentally and that predicted theoretically.
- Published
- 1966
- Full Text
- View/download PDF
58. The location and analysis of neutrino interactions in photographic emulsion
- Author
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C. Bricman, M. A. Roberts, G. Schorochoff, F. F. Heymann, D.A. Garbutt, W. T. Toner, Jacques Lemonne, John H. Wickens, B. G. Duff, W. Busza, Dudley Davis, K.M. Potter, Jean Sacton, and E. H. S. Burhop
- Subjects
Physics ,Nuclear and High Energy Physics ,Particle physics ,Large Hadron Collider ,Physics::Instrumentation and Detectors ,Proton Synchrotron ,Astronomy and Astrophysics ,Atomic and Molecular Physics, and Optics ,Condensed Matter::Soft Condensed Matter ,Nuclear physics ,Stack (abstract data type) ,Emulsion ,High Energy Physics::Experiment ,Nuclear emulsion ,Photographic emulsion ,Neutrino ,Spark chamber ,Nuclear Experiment - Abstract
A stack of nuclear emulsion pellicles of total volume 10 litres was placed, together with two spark chambers in the neutrino beam of the CERN proton synchrotron. The tracks of secondary particles from neutrino interactions in the emulsion were observed in the spark chamber. The spark chamber tracks were used to locate the tracks produced by the same particles in the emulsion. These tracks were then followed back in the emulsion to the neutrino interaction in which they originate. Of a total of seven neutrino interactions expected to be produced in the emulsion stack during this exposure four were located in this way and their characteristics studied.
- Published
- 1965
- Full Text
- View/download PDF
59. Final state interactions among the decay products of the hypernuclei Λ8Li and Λ12B
- Author
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Gaston Wilquet, Dudley Davis, John H. Wickens, Pierre Vilain, Dirk Michael Harmsen, Jean Sacton, and W. Gajewski
- Subjects
Nuclear physics ,Physics ,Nuclear and High Energy Physics ,Helium-4 ,Pion ,Binding energy ,Carbon-12 ,State (functional analysis) ,Atomic physics - Abstract
The results of a study of the decay of the Λ8Li and Λ12B hypernuclei are presented. The Λ 8 Li →π − + 8 Be ∗ →π − + 4 He + 4 He and Λ 12 B →π − + 12 C ∗ →π − + 4 He + 4 He + 4 He modes have been investigated in detail. New information on the decay mechanism of the 16.11 MeV state of 12C has been obtained.
- Published
- 1969
- Full Text
- View/download PDF
60. The binding energy values of the , and hypernuclei
- Author
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T. Pniewski, J.E. Allen, Dudley Davis, U. Krecker, J. Klabuhn, Pierre Vilain, E. Skrzypczak, A. Filipkowski, John H. Wickens, T. Sobczak, F. Wysotzki, W. Gajewski, D. O'Sullivan, Jean Sacton, R. R. Pniewska, Gaston Wilquet, Ghislaine Coremans, and G. Bohm
- Subjects
Physics ,Nuclear physics ,Nuclear and High Energy Physics ,Work (thermodynamics) ,Binding energy ,Atomic physics - Abstract
Further examples of the π− mesonic decay of Λ 7 Be , Λ 10 B and Λ 11 B hypernuclei are reported. The binding energy values obtained in this work are combined with previous results.
- Published
- 1969
- Full Text
- View/download PDF
61. A determination of the binding energy of the Λ13C hypernucleus
- Author
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J. Klabuhn, J.E. Allen, A. Filipkowski, Ghislaine Coremans, T. Pniewski, U. Krecker, Pierre Vilain, Gaston Wilquet, Dudley Davis, John H. Wickens, W. Gajewski, D. Stanley, and Jean Sacton
- Subjects
Nuclear physics ,Physics ,Nuclear and High Energy Physics ,Particle physics ,Pion ,Nuclear Theory ,Binding energy ,Carbon-13 ,High Energy Physics::Experiment ,Nuclear Experiment ,Hypernucleus - Abstract
From the observation of 11 examples of the π − mesonic decay of Λ 13 C the binding energy of this hypernucleus is found to be 11.39 ± 0.15 MeV.
- Published
- 1969
- Full Text
- View/download PDF
62. Final state interaction effects in π− mesonic decays of light hypernuclei
- Author
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J.E. Allen, Gaston Wilquet, E.R. Fletcher, D.H. Davis, R. Levi Setti, Pierre Vilain, A.P. Conway, D.M. Harmsen, Jean Sacton, J. Zakrzewski, and W. Gajewski
- Subjects
Physics ,Nuclear and High Energy Physics ,State (functional analysis) ,Atomic physics - Abstract
The results of a search for final-state interactions between the decay products of some light hypernuclei are presented. The following π− mesonic decays have been considered: Λ 3 H → π − + 1 H , Λ 4 H → π − + 1 H + 3 H , Λ 4 He → π − + 1 H + 3 He , Λ 5 He → π − + 1 H + 4 He , Λ 7 Li → π − + 3 He + 4 He , Λ 7 Li → π − + 1 H + 2 H + 4 He , Λ 7 Li → π − + 1 H + 6 Li , Λ 8 Li → π − + 4 He + 4 He , Λ 9 Li → π − + 4 He + 4 He + n , Λ 9 Be → π − + 1 H + 4 He + 4 He and Λ 12 B → π − + 4 He + 4 He + 4 He .
- Published
- 1968
- Full Text
- View/download PDF
63. On the angular correlation in μ-e decays observed in nuclear emulsions exposed in magnetic field
- Author
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Guy Vanderhaeghe, Jacques Heughebaert, Jean Sacton, and M. René
- Subjects
Physics ,Nuclear physics ,Nuclear and High Energy Physics ,Muon ,Angular distribution ,Angular correlation ,Astronomy and Astrophysics ,Electron ,Atomic and Molecular Physics, and Optics ,Magnetic field - Published
- 1957
- Full Text
- View/download PDF
64. High energy electronic neutrino (ve) and antineutrino () interactions
- Author
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V. Brisson, P. Musset, M.J. Esten, C. Franzinetti, E. Fiorini, Pierre Vilain, Donatella Cavalli, F. W. Bullock, James Pinfold, M. Jaffre, H. Wachsmuth, B. Degrange, D. Haidt, D. Lanske, E. Bellotti, A. Pullia, S. Natali, D.C. Cundy, J. Mc Kenzie, F.J. Hasert, L. Kluberg, H. Weerts, C. Conta, G. Bertrand-Coremans, U. Nguyen-Khac, L.M. Chounet, J. von Krogh, Ph. Heusse, Jean Sacton, W. Venus, M. Haguenauer, T.W. Jones, D.H. Perkins, H. Deden, A.M. Lutz, B. Aubert, P. Petiau, J. Morfin, G. Kalbfleisch, J.B.M. Pattison, M. Rollier, T. Eichten, S. Bonetti, G. Myatt, W. Krenz, W. Van Doninck, J.P. Vialle, and A. Rousset
- Subjects
Physics ,Nuclear and High Energy Physics ,Conservation law ,High energy ,Muon ,Scattering ,High Energy Physics::Lattice ,High Energy Physics::Phenomenology ,Nuclear physics ,High Energy Physics::Experiment ,Neutrino ,Nuclear Experiment ,Nucleon ,Lepton - Abstract
The total cross-sections for v e ( v e ) -nucleon scattering have been measured. A test has been made of the muon number conservation law. A limit of 2.4 GeV is found the mass of the “Georgi-Glashow type” heavy lepton
- Published
- 1973
- Full Text
- View/download PDF
65. The π+ mesonic decays of light hypernuclei
- Author
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C. Mayeur, John H. Wickens, F. Wysotzki, J. Klabuhn, E. Skrzypczak, A.P. Conway, T. Sobczak, V.A. Bull, Gaston Wilquet, D. O'Sullivan, D. Stanley, T. Pniewski, A. Filipkowski, Jean Sacton, W. Gajewski, Ghislaine Coremans, S.P. Lovell, Nathalie N.C. Roy, Dudley Davis, A. Fishwick, Pierre Vilain, K. Garbowska-Pniewska, G. Bohm, E.R. Fletcher, P.V. March, J.E. Allen, and U. Krecker
- Subjects
Nuclear physics ,Physics ,Nuclear and High Energy Physics ,Pion ,Helium-4 ,Branching fraction ,Isotopes of lithium ,Hypernucleus - Abstract
Twenty examples of π+ mesonic decays of light hypernuclei have been found together with 7000 π− mesonic decays. The ratio R4 of π+ mesonic decays for the gL4 He hypernucleus has been computed from the results of this work and those of a previous experiment [1] and is found to lie between the values 5.4 ± 1.5%1.7% and 6.9 ± 1.8%2.1%. The π+ mesonic decays of other species of hypernuclei are briefly discussed.
- Published
- 1969
- Full Text
- View/download PDF
66. Energy spectrum of charged pions from K− captures in CF3Br
- Author
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O. Skjeggestad, Jacques Lemonne, M. J. Beniston, F. Abraham, R. Levi Setti, B. Unneland, C. Vossler, A.G. Frodesen, Jean Sacton, F.O. Breivik, and Å.J. Eide
- Subjects
Physics ,Nuclear and High Energy Physics ,Pion ,Meson ,Binding energy ,Hyperon ,Bubble chamber ,Trapping ,Atomic physics ,Kinetic energy ,Spectral line - Abstract
From about 30 000 stopped K − mesons in the Ecole Polytechnique bubble chamber filled with CF 3 Br, a search has been made for long-range π − mesons due to the reaction K − + Br → → Λ Br + π − , in an attempt to determine a lower limit of the Λ binding energy in Λ Br. No event compatible with this reaction has been found. Results from measurements of the total π − and π + energy spectra have been used to investigate the production and trapping of Λ hyperons in K − captures on complex nuclei. From the frequency of Λ production associated with the emission of π − mesons with kinetic energy > 110 MeV, the fraction of directly produced Λ hyperons being trapped in the production nuclei was estimated as 0.29 −0.07 +0.15 . For Λ hyperons due to Σ conversion a lower limit for the same quantity is 0.28 ± 0.05.
- Published
- 1966
- Full Text
- View/download PDF
67. On the existence of the hypernucleus 8ΛHe
- Author
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T. Cantwell, J. Zakrzewski, D. Kiełczewska, A. Montwill, U. Krecker, T. Tymieniecka, Dudley Davis, F. Esmael, G. Coremans-Bertrand, M Juric, Jean Sacton, J. Klabuhn, and G. Bohm
- Subjects
Nuclear physics ,Physics ,Nuclear and High Energy Physics ,Particle physics ,chemistry ,chemistry.chemical_element ,Hypernucleus ,Helium - Abstract
The existence of the hypernucleus 8ΛHe has been established with the Λ-hyperon separation energy BΛ = 7.16 ± 0.70 MeV.
- Published
- 1971
- Full Text
- View/download PDF
68. Study of the π− mesonic decay of the Λ5He hypernucleus
- Author
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Pierre Vilain, W. Gajewski, Gaston Wilquet, Jacqueline Naisse, and Jean Sacton
- Subjects
Physics ,Nuclear and High Energy Physics ,Hydrogen ,Partial wave analysis ,chemistry.chemical_element ,Hypernucleus ,Spectral line ,Nuclear physics ,Helium-4 ,Pion ,Deuterium ,chemistry ,Helium-3 ,Atomic physics - Abstract
Some 2780 ( π − 1 H 4 He ) and 15(π − 2 H 3 He ) decays of the Λ5He hypernucleus have been collected and analyzed. The energy spectra and the angular distribution of the decay products have been studied. An improved formulation of the theoretical model describing the ( π − 1 H 4 He ) decay has been made, allowing a detailed comparison between theory and experiment.
- Published
- 1969
- Full Text
- View/download PDF
69. A determination of the $$B_\Lambda $$ values of light hypernucleivalues of light hypernuclei
- Author
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P.V. March, E.R. Fletcher, Gaston Wilquet, C. Mayeur, A.P. Conway, J.E. Allen, Pierre Vilain, P. Allen, V.A. Bull, D.A. Garbutt, M.A. Shaukat, D.H. Davis, D. Stanley, and Jean Sacton
- Subjects
Physics ,Particle physics ,Atomic physics ,Lambda - Abstract
Results are presented on the\(B_\Lambda \) values of hypernuclei in the mass rangeA=3 toA=12 obtained from a sample of 595 uniquely identified π−-mesonic decays. The problems of what constitute adequate selection criteria for the unique identification of an event are discussed. The disagreement between the\(B_\Lambda \) values obtained from different decay modes of\({}^4B_\Lambda \) indicates a possible error in the range-energy relationship.
- Published
- 1966
- Full Text
- View/download PDF
70. A measurement of the lifetime of the Λ5He hypernucleus
- Author
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J.E. Allen, G. Bertrand-Coremans, U. Krecker, John H. Wickens, F. Wysotzki, K. Garbowska-Pniewska, J. Klabuhn, Jean Sacton, G. Bohm, and Dudley Davis
- Subjects
Nuclear physics ,Physics ,Nuclear and High Energy Physics ,Helium-4 ,Value (computer science) ,Nuclear emulsion ,Atomic physics ,Hypernucleus - Abstract
The mean lifetime of the Λ 5 He hypernucleus has been estimated in nuclear emulsion using the π − + p + 4 He decays both at rest and in flight. The result obtained is τ( Λ 5 He ) = (2.74 −0.50 +0.60 )·10 −10 sec. This result together with the experimental value of Q − , the ratio of the non-mesonic to π − mesonic decay rates for Λ 5 He, has been used to determine the ratio R = Γ( Λ 5 He → π − + p + 4 He )/Γ(Λ 0 → π − + p ) .
- Published
- 1970
- Full Text
- View/download PDF
71. A compilation of binding energy values of light hypernuclei
- Author
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A.P. Conway, D. Stanley, P.V. March, C. Mayeur, J.E. Allen, Gaston Wilquet, M. Raymund, W. Gajewski, Jean Sacton, J. Zakrzewski, D.H. Davis, Pierre Vilain, D. Harmsen, V.A. Bull, E.R. Fletcher, and R. Levi Setti
- Subjects
Nuclear physics ,Physics ,Nuclear and High Energy Physics ,Particle physics ,Binding energy ,Selection (genetic algorithm) - Abstract
The results of a compilation of the binding energy values of light hypernuclei ( A ⩽ 16) obtained by the European K − Collaboration and the EFINS-North-western Collaboration are presented. The events were analysed by the same computer programme and uniform stringent selection criteria were applied.
- Published
- 1967
- Full Text
- View/download PDF
72. On the lifetime of the 3ΛH ypernucleus
- Author
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T. Pniewski, J.E. Allen, T. Sobczak, D. Stanley, U. Krecker, Pierre Vilain, John H. Wickens, F. Wysotzki, G. Bohm, Dudley Davis, J. Klabuhn, D. O'Sullivan, Jean Sacton, Ghislaine Coremans, and Gaston Wilquet
- Subjects
Physics ,Nuclear physics ,Rest (physics) ,Nuclear and High Energy Physics ,Particle physics ,Nuclear emulsion ,Hypernucleus ,Value (mathematics) - Abstract
The mean lifetime of the 3ΛH hypernucleus has been estimated in nuclear emulsion using the (π−+1H+2H) decays both at rest and in flight. The result, τ(3ΛH) = (1.28−0.26+0.35) · 10−10sec, is significantly lower than another recent experimental value [5] and the theoretical predictions. A possible explanation of the discrepancy with the theoretical predictions is briefly discussed.
- Published
- 1970
- Full Text
- View/download PDF
73. A measurement of the lifetime of the Λ3 H hypernucleus
- Author
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J. H. Wickens, Martin Paul Block, G.S. Keyes, and Jean Sacton
- Subjects
Physics ,Nuclear and High Energy Physics ,chemistry ,Branching fraction ,chemistry.chemical_element ,Bubble chamber ,Atomic physics ,Hypernucleus ,Helium - Abstract
The mean lifetime of the hypernucleus Λ 3 H has been measured in a helium bubble chamber with the result, τ ( Λ 3 H )=(2.46 −0.41 +0.62 )×10 −10 sec, based on 16 examples of the decay mode Λ 3 H→ π − + 3 He and 24 examples of the decay mode Λ 3 H→ π − +p+d. The decay branching ratio R 3 = Γ ( Λ 3 H → π − + 3He)/ Γ ( Λ 3 H → all π − modes ) has been estimated to be 0.30 ± 0.07.
- Published
- 1973
- Full Text
- View/download PDF
74. An upper limit to the cross section for the reaction at SPS energies
- Author
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Jean Sacton, T.W. Jones, A. Halsteinslid, G. Bertrand-Coremans, E. Fett, F. Rahimi, L. Welch, P.N. Ratoff, J.M. Olsen, R. Blaes, D. Bertrand, J. Morfin, M. Dewit, F. W. Bullock, A. Haatuft, S. de Unamuno, K. Myklebost, H. Weerts, M. Pohl, P. Petitjean, B. Escoubes, and Pierre Vilain
- Subjects
Nuclear physics ,Physics ,Nuclear and High Energy Physics ,Cross section (physics) ,Gargamelle ,Bubble chamber ,Limit (mathematics) ,Atomic physics ,Beam (structure) ,Charged current ,Mixing (physics) - Abstract
Candidates for the purely leptonic process ν μ e − → ν μ e − have been searched for in the bubble chamber Gargamelle exposed to the CERN-SPS antineutrino wide-band beam. No single e − , of energy greater than 1 GeV, was found in a total of 230 000 pictures, corresponding to 7400 charged current events. This leads to an upper limit for the observed cross section of σ obs −42 ( E ν − GeV ) cm 2 (90% C.L.). Interpretation of this value in terms of the standard W Weinberg-Salam model yields an upper limit to the mixing parameter sin 2 θ W
- Published
- 1979
- Full Text
- View/download PDF
75. The observation of a heavy helium hypernucleus
- Author
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A. Montwill, Pierre Vilain, Jacques Lemonne, J.E. Allen, Dudley Davis, M.A. Shaukat, Jean Sacton, D.A. Garbutt, C. Mayeur, E.R. Fletcher, V.A. Bull, and M. Rayet
- Subjects
Nuclear reaction ,Physics ,Nuclear physics ,Pion ,chemistry ,Carbon-12 ,General Physics and Astronomy ,chemistry.chemical_element ,Neutron ,Atomic physics ,Hypernucleus ,Helium - Published
- 1964
- Full Text
- View/download PDF
76. Production of hyperfragments from the interactions of 50 – 300 MeV/c K- mesons with emulsion nuclei
- Author
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L. Bishara, M.A. Hussain, Jacques Lemonne, Dudley Davis, Jean Sacton, and J. P. Lagnaux
- Subjects
Physics ,Range (particle radiation) ,Light nucleus ,Meson ,Physique ,Nuclear Theory ,General Physics and Astronomy ,Momentum ,Nuclear physics ,Emulsion ,High Energy Physics::Experiment ,Spallation ,Atomic physics ,Nuclear Experiment - Abstract
SCOPUS: ar.j, info:eu-repo/semantics/published
- Published
- 1963
- Full Text
- View/download PDF
77. Binding Energy ofΛ0Hyperons in Heavy Hypernuclei (60<A<100)
- Author
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Riccardo Levi Setti, Philippe Renard, G. Tomasini, O. Skjeggestad, M. Raymund, D. H. Davis, Jacques Lemonne, and Jean Sacton
- Subjects
Nuclear physics ,Momentum ,Physics ,Particle physics ,Range (particle radiation) ,Pion ,Binding energy ,Hyperon ,General Physics and Astronomy ,Limit (mathematics) ,Lambda - Abstract
The short-range hyperfragments from 800 Mev/c K/sup -/ interactions have been shown to possess mass values in the range A = 60 to 100, and an upper limit of 35 Mev has been placed on the value of their B/sub LAMBDA /. Details are tabulated for five pi -mesic decays attributed to hyperfragments of the same order of mass resulting from 0.8 and 1.5 Bev/c k/sup -/ interactions in emulsion. From these events, a more precise estimate of the upper limit of B/sub LAMBDA / is set at 25 Mev. (H.D.R.)
- Published
- 1962
- Full Text
- View/download PDF
78. The interactions of low energy K- mesons with protons
- Author
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E. H. S. Burhop, P. Allen, M. Csejthey-Barth, J. P. Lagnaux, T. P. Shah, V.A. Bull, M. Yaseen, A. Montwill, P.V. March, E.R. Fletcher, A. Thompson, J.E. Allen, D. O'Sullivan, Jean Sacton, M. Heeran, and Dudley Davis
- Subjects
Nuclear physics ,Physics ,Elastic scattering ,Particle physics ,Pion ,Low energy ,Meson ,Scattering ,S-wave ,General Physics and Astronomy ,Energy (signal processing) - Published
- 1965
- Full Text
- View/download PDF
79. Evidence for the existence of the 6ΛHe hypernucleus
- Author
-
V.A. Bull, C. Mayeur, A.P. Conway, Jean Sacton, W. Gajewski, Pierre Vilain, P.V. March, E.R. Fletcher, J.E. Allen, D. Stanley, Dudley Davis, and Gaston Wilquet
- Subjects
Nuclear physics ,Physics ,Particle physics ,General Physics and Astronomy ,Hypernucleus - Abstract
Evidence for the existence of a particle-stable state of the 6 Λ He hypernucleus is presented.
- Published
- 1966
- Full Text
- View/download PDF
80. Measurement of the structure functionsF2 andxF3 and comparison with QCD predictions including kinematical and dynamical higher twist effects
- Author
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T. Coghen, G. Gerbier, Amanda Cooper-Sarkar, C. Vallée, A. Vayaki, W. Wittek, M. Calcchio, V. Brisson, E. F. Claytoh, G. T. Jones, D. R. O. Morrison, M. Aderholz, C. Kochowski, P. Petiau, F. Ruggieri, P. Kasper, N. Armenise, K. Varvell, G. Iaselli, E. Simopoulou, O. Erriquez, Pierre Marage, M. Mermikides, W. Burkot, H. Wachsmuth, Jean Sacton, M. Neveu, S. Natali, J. P. Baton, P. J. Fitch, R. P. Middleton, J. Guy, M. M. Mobayyen, A. Petrides, P. O. Hulth, D. Bertrand, Mikael Berggren, R. A. Sansum, Salvatore Nuzzo, W. Venus, S. W. O'Neale, Jon-Paul R. Wells, H. Klein, M. A. Parker, F. W. Bullock, and Girod, Dominique
- Subjects
Quantum chromodynamics ,Physics ,Particle physics ,Physics and Astronomy (miscellaneous) ,Isoscalar ,chemistry.chemical_element ,Elementary particle ,Lambda ,Nuclear physics ,Neon ,chemistry ,[PHYS.PHYS.PHYS-INS-DET] Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det] ,Field theory (psychology) ,Twist ,Nucleon ,Engineering (miscellaneous) ,Particle Physics - Experiment - Abstract
The isoscalar nucleon structure functions F2(x, Q2) and xF3(x, Q2) are measured in the range 0
- Published
- 1987
81. A study of the EMC effect using neutrino and antineutrino interactions in neon and deuterium
- Author
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A. Vayaki, W. Wittek, Phillip Allport, R. Cirio, H. Wachsmuth, B. Saitta, E. Simopoulou, F. Bobisut, V. Brisson, M. Neveu, Mikael Berggren, D. R. O. Morrison, E. F. Clayton, D. B. Miller, T. Coghen, A. G. Frodesen, P. Petiau, G. Gerbier, P. Kasper, A. M. Rossi, P. O. Hulth, O. Erriquez, C. Vallée, W. Venus, Jean Sacton, Alessandra Romero, K. Varvell, Norbert Schmitz, G. W. Van Apeldoorn, A. Tenner, N. Armenise, R. P. Middleton, M. Calicchio, G. Mandrioli, A. Baldini, F. W. Bullock, P. Capiluppi, A. Marzari-Chiesa, H. Klein, M. A. Parker, P. J. Fitch, J. Guy, Daniel Vignaud, G. Giacomelli, B. Jongejans, G. T. Jones, D. Bertrand, C. Angelini, A. Sansum, N. van Eijndhoven, Amanda Cooper-Sarkar, M. M. Mobayyen, Steve O'Neale, A. Sconza, Pierre Marage, and M. L. Faccini-Turluer
- Subjects
Quark ,Physics ,Particle physics ,Valence (chemistry) ,Physics and Astronomy (miscellaneous) ,EMC effect ,chemistry.chemical_element ,Nuclear physics ,Neon ,chemistry ,Deuterium ,Physique des particules élémentaires ,Neutrino ,Nucleon ,Engineering (miscellaneous) ,Charged current ,Particle Physics - Experiment - Abstract
Nearly 40000 neutrino and antineutrino interactions in BEBC are compared to measure the differences between neon and deuterium in the quark and antiquark distributions and in the nucleon structure functions. The ratio of Ne to D cross sections indicates some decrease between x∼0.2 and x∼0.6. The y distributions show there is no significant increase in the neon sea, but prefer a small decrease. Taken altogether, the x and y distributions and the measured total cross-sections indicate some change in the shape of the valence distributions. No significant dependence on A is observed for either the shape of the sea or the ratio of longitudinal to transverse cross-sections. © 1987 Springer-Verlag., 0, 52 auteurs, SCOPUS: ar.j, info:eu-repo/semantics/published
- Published
- 1986
82. Coherent production of π+ mesons in ν-neon interactions
- Author
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G. T. Jones, Amanda Cooper-Sarkar, T. Coghen, A. Vayaki, W. Wittek, D. R. O. Morrison, W. Burkot, W. Venus, K. Varvell, R. A. Sansum, P. P. Allport, Pierre Marage, M. A. Parker, J. P. Baton, Jean Sacton, J. Guy, E. Simopoulou, E. Matsinos, O. Erriquez, N. Armenise, H. Wachsmuth, N. Schmitz, M. Neveu, P. O. Hulth, M. Calicchio, and Mikael Berggren
- Subjects
Physics ,Particle physics ,Muon ,Physics and Astronomy (miscellaneous) ,Meson ,High Energy Physics::Lattice ,Hadron ,High Energy Physics::Phenomenology ,Nuclear Theory ,chemistry.chemical_element ,Nuclear physics ,Neon ,Pion ,Isotopes of neon ,chemistry ,High Energy Physics::Experiment ,Neutrino ,Nuclear Experiment ,Engineering (miscellaneous) ,Lepton - Abstract
The coherent production of π+ mesons by charged current neutrino interactions on neon nuclei in BEBC is compared to the predictions of the PCAC hypothesis and the meson dominance model. Good agreement is observed. © 1989 Springer-Verlag.
- Published
- 1989
83. Dilepton and Trilepton Production by Antineutrinos and Neutrinos in Neon
- Author
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P. O. Hulth, Norbert Schmitz, E. F. Clayton, Amanda Cooper-Sarkar, H. Wachsmuth, J. Guy, M. Neveu, D. Bertrand, M. Lagraa, O. Erriquez, J. H. Bartley, N. Armenise, H. Klein, R. P. Middleton, C. Vallée, P. J. Fitch, S. Leighton-Davis, M. A. Parker, E. Zevgolatakos, C. Kochowski, M. M. Mobayyen, R. A. Sansum, A. Vayaki, W. Wittek, Jean Sacton, Salvatore Nuzzo, G. T. Jones, E. Simopoulou, Jon-Paul R. Wells, M. Talebzadeh, P. Kasper, W. Venus, R. Belusevic, M. Calicchio, V. Brisson, D. R. O. Morrison, T. Coghen, J. P. Baton, G. Gerbier, D. Brou, F. W. Bullock, M. Aderholz, P. Petiau, K. Varvell, D. B. Miller, Pierre Marage, and Steve O'Neale
- Subjects
Nuclear physics ,Physics ,Particle physics ,Neon ,Physics and Astronomy (miscellaneous) ,chemistry ,Physique des particules élémentaires ,chemistry.chemical_element ,Neutrino ,Engineering (miscellaneous) ,Charged current ,Particle Physics - Experiment ,Standard Model - Abstract
A sample of over 25,000 fully measured neutrino and antineutrino charged current interactions in BEBC includes 192 dilepton candidates. The prompt signal after subtraction of background is 41 ±7μ+e-, 35±7μ+μ- events from {Mathematical expression} interactions, and 32±7μ-μ+ events from ν interactions. There are 2 trileptons, μ-μ-e+ and μ-μ-μ+. Results are compared with other experimental data and with the standard model. Limits to prompt like sign μ+e+, μ+μ+ and μ-μ- signals are given and compared with other experiments and with theoretical calculations. © 1985 Springer-Verlag., 47 auteurs, SCOPUS: ar.j, info:eu-repo/semantics/published
- Published
- 1985
84. Investigation of the decay of charmed particles produced in neutrino interactions
- Author
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J. H. Bartley, S. Di Liberto, D. Gamba, F.R. Stannard, Leith Godfrey, Corrado Angelini, A. Nappi, R. Casali, G.M. Pierazzini, R. Pazzi, M. L. Ferrer, Pierre Vilain, Dn Tovee, V. Bisi, A. Marzari, G. Bertrand-Coremans, G. Romano, E.H.S. Burhop, F. Carena, F. Marzano, R. Fantechi, Jh Wickens, M. Conversi, G. Ciapetti, Paolo Bagnaia, R. Santonico, A.C. Breslin, Jean Sacton, A. Romero, D.H. Davis, D. Allasia, S. Petrera, C. Palazzi-Cerrina, C. Franzinetti, Ramazan Sever, G. Baroni, A. Montwill, E. Lamanna, Declan Keane, Gaston Wilquet, and P. Tolun
- Subjects
Baryon ,Physics ,Nuclear physics ,Nuclear and High Energy Physics ,Bubble chamber ,Particle ,Nuclear emulsion ,Neutrino ,Event (particle physics) ,Charged current ,Charged particle ,Particle Physics - Experiment - Abstract
The decay of charmed particles produced by high-energy neutrinos has been studied by an experiment using simultaneously emulsion, bubble chamber and counter techniques. Eight charmed particle candidates, 5 positively charged and 3 neutral, have been found in the emulsion, where their production and decay have been directly observed. One of these events is identified as a Λ c + baryon of mass 2.26±0.02 GeV/ c 2 which undergoes the decay Λ c + →pK − π + after a proper time of (7.3±0.1) · 10 −13 s. A statistical analysis of the other observed decays leads to the mean-life values τ + =(2.5 −1.1 +2.2 ) · 10 −13 s, τ 0 =(0.53 −0.25 +0.57 ) · 10 −13 s, for the sample of charged particles enriched by a similar event found in a previous experiment, and for the sample of 3 neutral particles, respectively. The former value is only slightly affected by including in the sample the Λ c + event or excluding that of the previous experiment.
- Published
- 1980
85. An attempt to observe directly beauty particles in nuclear emulsions
- Author
-
O. Yamakawa, D.C. Imrie, R. Arnold, Y. Maeda, M. Barth, D.H. Davis, F. Ruggieri, G. Schorochoff, N. Ushida, I. Tezuka, F.F. Heymann, D.G. Davis, O. Erriquez, K. Niu, J. K. Downes, A. Montwill, A.C. Breslin, Shigeki Tasaka, R. Roosen, A. O'Connor, Salvatore Nuzzo, Motoaki Miyanishi, S. Natali, I. G. Roberts, G. Rosa, P. Musset, Y. Tsuneoka, Francesco Romano, M. Calicchio, H. Shibuya, I. Gjerpe, D. Bertrand, Jean Sacton, Alessandra Romero, A. Manfredini, P. Lavopa, L. Di Ciaccio, Gilbert Poulard, Mitsuhiro Nakamura, G. Romano, S. Di Liberto, M. Ohashi, M. J. Esten, P. T. Trent, D. Gamba, K. Niwa, J. P. Albanese, L. Riccati, N. Armenise, H. Sletten, G.J. Lush, Y. Isokane, N. Yanagisawa, D.N. Tovee, M. Hazama, D. Allasia, V. Bisi, M. J. Price, G. Baroni, B.G. Duff, L. Ramello, A. Marzari-Chiesa, G. Bertrand-Coremans, F. Sebastiani, C. Matteuzzi, F.R. Stannard, Giorgio Maggi, J. H. Wickens, S. Petrera, M. Coupland, Franco Meddi, K. Hoshino, R. Santonico, F. Piuz, Yoshihiro Sato, M. T. Muciaccia, Institut de Recherches Subatomiques (IReS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Cancéropôle du Grand Est-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), NA19, and Heyd, Yvette
- Subjects
Physics ,Nuclear and High Energy Physics ,Large Hadron Collider ,Muon ,[PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex] ,Physics::Instrumentation and Detectors ,media_common.quotation_subject ,Direct observation ,Engineering physics ,nuclear emulsions ,Nuclear physics ,beauty particles ,cern sps ,Cascade ,Beauty ,Physique des particules élémentaires ,[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex] ,High Energy Physics::Experiment ,Particle Physics - Experiment ,media_common - Abstract
An attempt at the direct observation of the cascade decay of beauty particles, produced by π- of 350 GeV/c leading to 3 muons or 4 muons in the final state, has been made in an emulsion/counter hybrid experiment at CERN. Under the assumption that the lifetime of beauty particles is of the order of 10-13s the non-observation of any candidates provides an upper limit for beauty production of ∼90 nb at the 90% confidence level., 0, SCOPUS: ar.j, info:eu-repo/semantics/published
- Published
- 1983
86. Coherent single pion production by antineutrino charged current interactions and test of pcac
- Author
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M. M. Mobayyen, C. Vallée, M. Calicchio, A. Vayaki, W. Wittek, P. Petiau, R. A. Sansum, E. F. Clayton, Mikael Berggren, Amanda Cooper-Sarkar, G. T. Jones, J. Guy, V. Brisson, P. J. Fitch, S. Natali, K. Varvell, Jean Sacton, D. R. O. Morrison, N. Armenise, W. Venus, D. B. Miller, F. Hamisi, D. Bertrand, P. O. Hulth, Jon-Paul R. Wells, H. Klein, H. Wachsmuth, M. A. Parker, R. P. Middleton, M. Neveu, W. Burkot, O. Erriquez, J. P. Baton, M. Aderholz, P. Kasper, F. W. Bullock, Pierre Marage, P. P. Allport, Steve O'Neale, E. Simopoulou, T. Coghen, G. Gerbier, and Girod, Dominique
- Subjects
Physics ,Particle physics ,Range (particle radiation) ,Large Hadron Collider ,Physics and Astronomy (miscellaneous) ,Meson ,[PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex] ,Nuclear Theory ,chemistry.chemical_element ,Propagator ,Absolute value ,Nuclear physics ,Neon ,Pion ,chemistry ,Physique des particules élémentaires ,High Energy Physics::Experiment ,Nuclear Experiment ,Engineering (miscellaneous) ,Charged current ,Particle Physics - Experiment - Abstract
The cross section for coherent production of a single π- meson in charged current antineutrino interactions on neon nuclei has been measured in BEBC to be (175±25) 10-40 cm2/neon nucleus, averaged over the energy spectrum of the antineutrino wide band beam at the CERN SPS; this corresponds to (0.9±0.1) % of the total charged current {Mathematical expression} cross section. The distributions of kinematical variables are in agreement with theoretical predictions based on the PCAC hypothesis and the meson dominance model; in particular, the Q2 dependence is well described by a propagator containing a mass m=(1.35±0.18) GeV. The absolute value of the cross section is also in agreement with the model. This analysis thus provides a test of the PCAC hypothesis in the antineutrino energy range 5-150 GeV. © 1986 Springer-Verlag., 0, 42 auteurs, SCOPUS: ar.j, info:eu-repo/semantics/published
- Published
- 1986
87. Determination of the Neutral to Charged Current Cross-Section Ratio for Antineutrino Interactions on Protons
- Author
-
O. Erriquez, D.C. Colley, C. Kochowski, J. Guy, A. G. Michette, M. Neveu, H. Alamatsaz, J. P. Baton, F. Ruggieri, M. F. Votruba, N. Armenise, J. Moreels, V. Brisson, S. Natali, J. H. Bartley, W. Van Doninck, P. Petiau, D. Bertrand, W. Venus, Salvatore Nuzzo, T. Francois, G. Gerbier, M.T. Fogli-Muciaccia, A. M. Cooper, M. Tyndel, M. Calicchio, C. Vander Velde-Wilquet, Steve O'Neale, Jean Sacton, S. J. Sewell, R. Belusevic, M. A. Parker, T. Azemoon, and G. T. Jones
- Subjects
Nuclear physics ,Physics ,Nuclear and High Energy Physics ,Antiparticle ,Muon ,Neutral current ,Antimatter ,Hadron ,Physique des particules élémentaires ,Atomic physics ,Neutrino ,Charged current ,Lepton - Abstract
An exposure of BEBC equipped with the hydrogen-filled TST to the v μ wide band beam at the CERN SPS has been used to study v μ interactions on free protons. About neutral induced interactions have been observed inside the hydrogen and separated into charged current, neutral current and neutral hadron interactions using a multivariate discriminant analysis based on the kinematics of the events. The neutral to charged current cross-section ratio has been determined to be R p v = 0.33 ± 0.04. When combined with the value of R p v previously determined in the same experiment, the result is compatible with the prediction of the standard SU (2) × U (1) model for sin 2θ W = 0.24 -0.08 +0.06 and ρ = 1.07 -0.08 +0.06. Fixing the parameter ρ = 1 yields sin 2θ W = 0.18 ± 0.04., 0, SCOPUS: ar.j, info:eu-repo/semantics/published
- Published
- 1984
88. On The Lifetime Of Charged Charmed Particles: First Direct Observation Of A Charmed Baryon Decay
- Author
-
Dn Tovee, R. Santonico, F. Marzano, A. Nappi, P. Villain, Jh Wickens, J. H. Bartley, G. Ciapetti, L. Riccati, L. Godfrey, G. Romano, R. Pazzi, F. Carena, R. Morganti, M. Conversi, A. Romero, F.R. Stannard, E.H.S. Burhop, D. Gamba, M. L. Ferrer, V. Bisi, E. Lamanna, Gaston Wilquet, P. Tolun, A. Marzari, Jean Sacton, A. Montwill, P. Bagnaia, D. Keane, C. Franzinetti, G. Bertrand-Coremans, A. Breslin, G. M. Pierazzini, G. Baroni, Sergio Petrera, Ramazan Sever, S. Di Liberto, R. Casali, C. Palazzi-Cerrina, D.H. Davis, and C. Angelini
- Subjects
Physics ,Nuclear and High Energy Physics ,Particle physics ,High Energy Physics::Phenomenology ,Hadron ,Direct observation ,Theoretical models ,Nuclear physics ,Baryon ,Decay time ,High Energy Physics::Experiment ,Nuclear emulsion ,Neutrino ,Nuclear Experiment ,Particle Physics - Experiment - Abstract
Two new examples of production by neutrinos and subsequent decay of charged charmed hadrons are reported. Together with two similar events reported previously they show that the lifetime of charged charmed particles is in the neighbourhood of 5 × 10−13 s, as expected from current theoretical models. One of the new events is identified as a baryon λc+ of mass 2.295 ± 0.015 GeV/c2 which undergoes the decay process λc+ → pπ+K− with a proper decay time (7.3 ± 0.1) × 10−13 s.
- Published
- 1979
89. Photographic Emulsion Versus Bubble Chambers in Charm and Beauty Searches
- Author
-
Jean Sacton
- Subjects
Physics ,Particle physics ,Physics::Instrumentation and Detectors ,media_common.quotation_subject ,Bubble ,Computer graphics (images) ,Beauty ,High spatial resolution ,Bubble chamber ,High Energy Physics::Experiment ,Charm (quantum number) ,Vertex detector ,Photographic emulsion ,media_common - Abstract
This talk is intended to serve as an introduction to the discussion session on the use of visual detectors in the search for charm and other flavours. I have limited it to the presentation of some general considerations and a few elements of comparison between the photographic emulsion and the bubble chamber techniques. In this field of research both these techniques are currently used as high spatial resolution vertex detectors incorporated in large and complex counter set-ups (*).
- Published
- 1984
- Full Text
- View/download PDF
90. Search for short-lived particles in high-energy neutrino interactions identified using a hybrid emulsion--spark-chamber arrangement
- Author
-
E.H.S. Burhop, M. Jung, D. A. Garbutt, G. Bassompierre, G. Blaes, R. Santonico, A.C. Breslin, N. Kurtz, S Diliberto, G. Baroni, Pierre Vilain, R. Klein, M. Paty, M. L. Ferrer, Filippo Ceradini, L. Federici, S. Gentile, Dn Tovee, F.R. Stannard, A.L. Read, G. Romano, Jean Sacton, A. Montwill, S. Petreta, M. Schneegans, G. Coremans-Bertrand, F.M. Schmitt, M. Conversi, Dudley Davis, Institut de Recherches Subatomiques (IReS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Cancéropôle du Grand Est-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), and Heyd, Yvette
- Subjects
Physics ,Nuclear physics ,Particle physics ,Particle decay ,[PHYS.NEXP] Physics [physics]/Nuclear Experiment [nucl-ex] ,Fermilab ,Neutrino ,Spark chamber ,Photographic emulsion ,[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex] ,Event (particle physics) ,Particle identification ,Beam (structure) - Abstract
Seventeen litres of nuclear photographic emulsion have been exposed to the wide-band neutrino beam at Fermilab. Tracks of secondaries from neutrino interactions in the emulsion were observed in a wide-gap spark chamber and a system of narrow-gap spark chambers and counters down beam. From measurements on the tracks in the wide-gap chamber the positions of vertices from which the secondaries diverged were predicted and 37 neutrino interactions in emulsion were located. Factors affecting the efficiency of location of events searched for (approx.20% in this experiment) are assessed and conclusions drawn about means of optimizing the design of experiments employing emulsion hybrid techniques. In one of the interactions a secondary track gave rise to three tracks after a distance of 182 ..mu..m. Further measurements made on this event do not alter the previous conclusion of its most likely interpretation as the decay of a short-lived particle of lifetime approx.6 x 10/sup -13/ sec.
- Published
- 1979
91. Study of the π+ meson energy spectrum below 30 MeV in the decay K+ → π+ + π0 + π0
- Author
-
A. Montwill, J. Zakrzewski, Jacek Ciborowski, Dudley Davis, Ž Z. Todorović, T. T. Sobzcak, S. S. Drndarević, Alan A. Burns, Jean Sacton, and D. Bertrand
- Subjects
Physics ,Nuclear physics ,Nuclear and High Energy Physics ,Polynomial ,Low energy ,Meson ,Energy spectrum ,Spectrum (functional analysis) ,Physique des particules élémentaires ,Matrix element ,Atomic physics ,Nuclear Experiment ,Physique atomique et nucléaire - Abstract
Result are presented of an emulsion study of the low energy part of the π+ spectrum (1 MeV < Tπ < 30 MeV) resulting from 4639 τ′ decays of K+ mesons at rest. Contrary to the findings of Davison et al. this experiment shows no evidence for the existence of the σ(π0π0) resonant state, there being no lack of events at the lowest energies. The spectrum is analysed in terms of a standard polynomial development of the decay matrix element. © 1976., SCOPUS: ar.j, info:eu-repo/semantics/published
- Published
- 1976
92. A search for charged particles originating from the interactions of 300 GeV/c protons in emulsion nuclei
- Author
-
M. Jung, G. Baroni, S. McMahon, A Manfredini, F.R. Stannard, Sergio Petrera, D.H. Davis, Jean Sacton, G. Romano, N. Kurtz, T. Pniewski, A.C. Breslin, A. Montwill, M. Paty, S. Di Liberto, D.N. Tovee, G. Coremans-Bertrand, Institut de Recherches Subatomiques (IReS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Cancéropôle du Grand Est-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), and Heyd, Yvette
- Subjects
Physics ,Nuclear physics ,Nuclear and High Energy Physics ,Range (particle radiation) ,Particle physics ,[PHYS.NEXP] Physics [physics]/Nuclear Experiment [nucl-ex] ,Emulsion ,[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex] ,Nucleon - Abstract
The associated production of charmed particles by the interactions of 300 GeV/ c protons with complex nuclei has been sought using nuclear emulsions. The failure to observe any candidates for this process among some 60,000 interactions investigated implies, provided charmed particles lifetimes are in the range 10 −12 to 10 −14 s, a cross section for their associated production by the interactions of 300 GeV/ c protons with nucleons of less than 1.5 microbarns at a 90% confidence level.
- Published
- 1976
93. Measurement of total cross sections for neutrino and antineutrino charged-current interactions in hydrogen and neon
- Author
-
C. Vallée, Amanda Cooper-Sarkar, A. Vayaki, W. Wittek, Norbert Schmitz, D. Radojicic, O. Erriquez, J. P. Baton, G. Corrigan, M. Calicchio, K. Varvell, B. W. Kennedy, D. Bertrand, H. Wachmuth, D. B. Miller, W. Venus, S. J. Towers, G. T. Jones, D. R. O. Morrison, P. Kasper, Peter Schmid, M. Aderholz, E. Hoffmann, M. M. Mobayyen, M.T. Fogli-Muciaccia, E. Simopoulou, F. Hamisi, P. O. Hulth, Jon-Paul R. Wells, G. Myatt, E. F. Clayton, T. Coghen, P. N. Shotton, Jean Sacton, R. A. Sansum, Keith W. J. Barnham, Steve O'Neale, M. Lagraa, R. P. Middleton, P. J. Fitch, Pierre Marage, Mikael Berggren, H. Klein, M. A. Parker, R. W. L. Jones, F. W. Bullock, and J. Guy
- Subjects
Physics ,Nuclear and High Energy Physics ,Large Hadron Collider ,Hydrogen ,chemistry.chemical_element ,Nuclear physics ,Neon ,chemistry ,Physique des particules élémentaires ,Wide band ,Neutrino ,Atomic physics ,Nucleon ,Particle Physics - Experiment ,Charged current - Abstract
BEBC filled in turn with hydrogen, and with a neon-hydrogen mixture, was exposed to the CERN SPS wide band neutrino and antineutrino beams. The ratios of the charged-current cross sections per nucleon, σ(νH2) σ(νNe) and σ(νH2) σ(νNe), between 20 and 300 GeV were found to be 0.656 ± 0.020 and 1.425 ± 0.052, respectively. Multiplying these ratios by the revised cross sections in neon, σ(νNe) E = (0.723 ± 0.038) × 10-38 cm2/GeV per nucleon and σ(νNe) E = (0.351 ± 0.019) × 10-38 cm2/GeV per nucleon, and their ratio, σ(νNe) σ(νNe) = 0.485 ± 0.020, yields values for the total charged-current cross sections on protons, σ(νp)/E and σ(νp) E, of (0.474 ± 0.029) × 10-38 cm2/GeV and (0.500 ± 0.032) × 10-38 cm2/GeV. respectively, and a value for the ratio σ(νp) σ(νp) of 1.053 ± 0.066. © 1986., 0, SCOPUS: ar.j, info:eu-repo/semantics/published
- Published
- 1986
94. Interactions cohérentes diffractives, du type courant chargé, de neutrinos et d'antineutrinos sur noyaux de Néon: Mémoire présenté en vue de l'obtentin du grade de licencié en sciences physiques -- Physique
- Author
-
Jean Sacton, Pierre Marage, Queeckers, Patrick, Jean Sacton, Pierre Marage, and Queeckers, Patrick
- Abstract
info:eu-repo/semantics/nonPublished
- Published
- 1985
95. On the emission of neutral hyperons from k--interactions at rest with emulsion nuclei
- Author
-
M. Csejthey-Barth, Jean Sacton, J. Zakrzewski, B. Sanjeevaiah, B. D. Jones, and Dudley Davis
- Subjects
Physics ,Rest (physics) ,Nuclear and High Energy Physics ,Meson ,High Energy Physics::Phenomenology ,Nuclear Theory ,Hyperon ,Astronomy and Astrophysics ,Strangeness ,Atomic and Molecular Physics, and Optics ,Physique atomique et nucléaire ,Nuclear physics ,Emulsion ,Neutron ,High Energy Physics::Experiment ,Photographic emulsion ,Absorption (chemistry) ,Atomic physics ,Nuclear Experiment - Abstract
A systematic search has been made for decays of A0-hyperons around 5262 interactions of K--mesons at rest in photographic emulsion. From the 41 decays of correlated A0-hyperons observed in this sample, it has been estimated that (47±7)% of all K--meson interactions at rest in emulsion nuclei emit neutral hyperons. On consideration of the conservation of strangeness it is suggested that cryptofragments are formed in (30±7)% of all such K--meson absorptions and that the non-mesonic decays of these cryptofragments give rise to a considerable proportion of the protons of energies greater than 60 MeV emitted from K--meson captures. © 1961 Società Italiana di Fisica., SCOPUS: ar.j, info:eu-repo/semantics/published
- Published
- 1961
96. The production of heavy hyperfragments by K--meson captures at rest in emulsion nuclei
- Author
-
C. Mayeur, Jacques Lemonne, J.E. Allen, D.A. Garbutt, Jean Sacton, and Dudley Davis
- Subjects
Rest (physics) ,Physics ,Nuclear physics ,Nuclear reaction ,Nuclear and High Energy Physics ,Range (particle radiation) ,Meson ,Emulsion ,Astronomy and Astrophysics ,Spallation ,Atomic physics ,Atomic and Molecular Physics, and Optics ,Physique atomique et nucléaire - Abstract
In this study of hyperfragment production by K--meson absorptions at rest in emulsion nuclei, an attempt has been made to estimate the contribution of heavy spallation hyperfragments to the total observed number. In a sample of 24 640 K--meson captures, 1612 secondary events have been attributed to the production and subsequent decay of hyperfragments. From a study of the characteristics of both the production and decay disintegrations, it is concluded that about one half of the observed hyperfragments consists of λ0-hyperons trapped in the heavy spallation products of silver and bromine and these are almost entirely confined to the (0/3) μm range interval. The consequences of their presence aie discussed.
- Published
- 1964
97. Production of hyperfragments from the interactions of 1.3 GeV/c and 1.5 GeV/c K- mesons with emulsion nuclei
- Author
-
T. P. Shah, Jean Sacton, P. Allen, D. O'Sullivan, Rajendra R.C. Kumar, T. Pniewski, M. Heeran, J. Zakrzewski, E.R. Fletcher, A. Thompson, D.A. Garbutt, A. Montwill, Philippe Renard, P.V. March, Jacques Lemonne, J.E. Allen, and M.J. Beniston
- Subjects
Nuclear physics ,Physics ,Range (particle radiation) ,Meson ,Fission ,Physique ,Emulsion ,Hyperon ,General Physics and Astronomy ,Elementary particle ,Spallation ,Lambda - Abstract
SCOPUS: ar.j, info:eu-repo/semantics/published
- Published
- 1963
98. The identification of a double hyperfragment
- Author
-
Jacek Pniewski, P.V. March, P. Allen, D.A. Garbutt, A. Thompson, W. T. Toner, Jacques Lemonne, J.E. Allen, E.R. Fletcher, J. Zakrzewski, Krystyna Garbowska, M.J. Beniston, A. Montwill, T. P. Shah, T. Pniewski, M. Danysz, V.A. Bull, Dudley Davis, Philippe Renard, D. O'Sullivan, Rajendra R.C. Kumar, Jean Sacton, and Sr M. Heeran
- Subjects
Nuclear physics ,Physics ,Nuclear and High Energy Physics ,Particle physics ,Meson ,Cascade ,Hyperon ,Event (particle physics) ,Physique atomique et nucléaire - Abstract
The detailed analysis is presented of an event which is interpreted as the mesonic cascade decay of a double hyperfragment produced by the capture of a Ξ- hyperon on a light emulsion nucleus. The most likely interpretations of the double hyperfragment are those in terms of either ΛΛBe10 or ΛΛBe11. © 1963., SCOPUS: ar.j, info:eu-repo/semantics/published
- Published
- 1963
99. Hyperfragment production in K--meson absorptions at rest in nuclear emulsions. Non-mesic decays
- Author
-
Jean Sacton
- Subjects
Nuclear physics ,Physics ,Rest (physics) ,Sciences de la terre et du cosmos ,Environnement et pollution ,Nuclear and High Energy Physics ,Particle physics ,Stars ,Meson ,Charge density ,Astronomy and Astrophysics ,Charge (physics) ,Atomic and Molecular Physics, and Optics - Abstract
The results of the analysis of 78 non-mesic hyperfragments including double centered stars produced in K--meson absorptions at rest are given. The Z-spectrum of the hyperfragments is studied. 12 decays have been uniquely identified and in 6 other cases the charge of the hyperfragment has been unambigously determined. For the remaining events only limits could be put to the charge of the hyperfragment. Combining the charge distribution established here with that obtained for the mesic hyperfragments in a previous investigation, one can obtain the non-mesic to mesic decay ratio as a function of Z. © 1960 Società Italiana di Fisica., SCOPUS: ar.j, info:eu-repo/semantics/published
- Published
- 1960
100. Observation of a double hyperfragment
- Author
-
Jacques Lemonne, J.E. Allen, Rajendra R.C. Kumar, Krystyna Garbowska, P. Allen, M.J. Beniston, P.V. March, Philippe Renard, M. Danysz, D.A. Garbutt, A. Thompson, J. Zakrzewski, T. Pniewski, V.A. Bull, M. Heeran, W. T. Toner, Dudley Davis, E.R. Fletcher, Jean Sacton, D. O'Sullivan, T. P. Shah, A. Montwill, and Jacek Pniewski
- Subjects
Nuclear physics ,Physics ,Light nucleus ,Angular distribution ,Meson ,Physique ,Binding energy ,Hyperon ,General Physics and Astronomy ,Atomic physics ,Astronomie ,Lambda ,Particle Physics - Experiment - Abstract
SCOPUS: ar.j, info:eu-repo/semantics/published
- Published
- 1963
Catalog
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