Search

Your search keyword '"J.G. Guy"' showing total 18 results
Start Over Author "J.G. Guy" Search Limiters Full Text
18 results on '"J.G. Guy"'

1. Production of Ds∗- mesons in antineutrino-neon charged current interactions

Author

Stephane Willocq, Grégoire Wallenborn, W. Wittek, S.P. Krutchinin, P. V. Pitukhin, O. Erriquez, J. P. Baton, G. S. Gapienko, K. Varvell, A. D. Andryakov, W. Venus, G. T. Jones, D. R. O. Morrison, V. A. Korotkov, V. V. Ammosov, V.S. Burtovoy, I.V. Makhlueva, J.G. Guy, Vyacheslav Klyukhin, M. Neveu, T. Coghen, V. S. Kaftanov, Jean Sacton, V.G. Zaetz, V. A. Gapienko, A.E. Asratyan, Pierre Marage, Mikael Berggren, and M. A. Kubantsev

Subjects
Physics, Nuclear and High Energy Physics, Meson, Branching fraction, Hadron, chemistry.chemical_element, Quarkonium, Nuclear physics, Neon, Pion, Pair production, chemistry, High Energy Physics::Experiment, Atomic physics, Nuclear Experiment, Particle Physics - Experiment, Charged current
Abstract

Evidence of the production of the Ds∗-(2111) meson in v μ Ne collisions is presented. The Ds∗- production rates the Ds−→φπ− branching fraction is estimated to be (2.3±0.7) × 10−3 of all charged currents having a hadronic mass W above 3 GeV.

Published
1991

2. BLOOD LOSS DURING TOTAL HIP REPLACEMENT

Author

J.G. Guy and N.O. Jones

Subjects
medicine.medical_specialty, Anesthesiology and Pain Medicine, Blood loss, business.industry, medicine, Total hip replacement, business, Surgery
Published
1993

3. Measurement of the ratio of total and differential cross sections on neutrons and protons for charged-current neutrino events

Author

S. Natali, T. Francois, S. J. Sewell, A. M. Cooper, J.G. Guy, M. Calicchio, F. W. Bullock, M. Neveu, T. Azemoon, O. Erriquez, R. Belusevic, F. Romano, W. Venus, Steve O'Neale, M. Tyndel, Jean Sacton, J. P. Baton, D. Bertrand, C. Kochowski, A.G. Michette, J. H. Bartley, G. Gerbier, T.W. Jones, D.H. Davis, V. Brisson, Salvatore Nuzzo, M.T. Fogli-Muciaccia, J. Alitti, M. Iori, M. A. Parker, M. F. Votruba, W. Van Doninck, G. T. Jones, J. Moreels, N. Armenise, Gaston Wilquet, D.C. Colley, P. Petiau, and C. Vander Velde-Wilquet

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Muon, Proton, Astrophysics::High Energy Astrophysical Phenomena, Nuclear Theory, High Energy Physics::Phenomenology, Elementary particle, Nuclear physics, Physique des particules élémentaires, Measurements of neutrino speed, High Energy Physics::Experiment, Neutron, Neutrino, Nuclear Experiment, Charged current, Lepton
Abstract

Charged-current neutrino interactions have been analysed in a sample of pictures from BEBC equipped with a TST. Using a method independent of both the neutrino flux and nuclear interaction corrections, the ratio R= σn/σp has been measured. The result is R=1.98±0.19 for the ratio of total cross sections. Bjorken x distributions for proton and neutron targets and for u and d quarks are compared. © 1981., 0, SCOPUS: ar.j, info:eu-repo/semantics/published

Published
1981

4. Upper limit to the cross section for at high energy

Author

T. Francois, V. Brisson, A.G. Michette, T.W. Jones, J.G. Guy, M. Neveu, L. Kluberg, N. Armenise, G. T. Jones, S. J. Sewell, Jean Sacton, Gaston Wilquet, O. Erriquez, F. Ruggieri, C. Kochowski, S. Natali, P. Petiau, D.C. Colley, D. Bertrand, J. P. Baton, M. J. Esten, Steve O'Neale, G. Gerbier, M. Tyndel, W. Van Doninck, F. W. Bullock, F. Romano, W. Venus, H.H. Bingham, J. H. Bartley, Salvatore Nuzzo, L. Lowe, D. J. Miller, N. J. Baker, D.H. Davis, M.T. Fogli-Muciaccia, C. Vandervelde-Wilquet, and J. Alitti

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, High energy, Cross section (physics), Neutral current, Weinberg angle, Limit (mathematics)
Abstract

A search for the purely leptonic neutral current process induced by antineutrinos: v μ + e − → v μ + e − , has been performed in the BEBC “TST” experiment. No contradiction has been observed with the Salam-Weinberg model.

Published
1979

5. Gamma and π0 production by 4 GeV/cπ+p interactions

Author

S. K. Tuli, G. Rinaudo, F. Marchetto, Giorgio Borreani, M. Suk, I. Dhar, and J.G. Guy

Subjects
Physics, Nuclear physics, Nuclear and High Energy Physics, Beam (structure)
Abstract

Inclusive data for the production of γ rays and π 0 are presented from an experiment with a 4 GeV/ c π + beam, using a track-sensitive target. The results are compared with data at other energies and with π + and π − distributions.

Published
1979

6. Electron production by 4.0 GeV/c π+p interactions

Author

S. K. Tuli, E. Menichetti, G. Rinaudo, Flavio Marchetto, Giorgio Borreani, C. Fisher, J.G. Guy, M. Suk, and G. Kalmus

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Electron pair, Pion, Production (computer science), Electron, Atomic physics
Abstract

We have investigated electron production in 4.0 GeV/ c π + pinteractions. Limits to direct electron pair production are measured and an example of ϱ 0 or ω 0 decay to e + e − is observed. The ratio of the number of singly produced electrons to the total number of charged pions is less than 6 × 10 -5 (at the 95% confidence level).

Published
1977

7. Observation of coherent diffractive charged current interactions of antineutrinos on neon nuclei

Author

M. Calicchio, E. Zevgolatakos, M. Aderholz, N. Armenise, C. Vallée, E. Simopoulou, J. H. Bartley, V. Brisson, K. L. Wernhard, R. A. Sansum, Salvatore Nuzzo, D. R. O. Morrison, A. M. Cooper, T. Azemoon, F. Ruggieri, F. W. Bullock, Jon-Paul R. Wells, Keith W. J. Barnham, J.G. Guy, A. Vayaki, W. Wittek, T. Coghen, G. Gerbier, Steve O'Neale, C. Kochowski, K. Varvell, P. Kasper, W. Venus, O. Erriquez, J. Chwastowski, P. O. Hulth, D. Bertrand, Pierre Marage, Jean Sacton, M. A. Parker, P. Petiau, M. M. Mobayyen, S. Leighton-Davies, G. T. Jones, M. Talebzadeh, J. P. Baton, R. P. Middleton, P. J. Fitch, E. F. Clayton, and M. Neveu

Subjects
Physics, Nuclear and High Energy Physics, Nuclear Theory, Hadron, chemistry.chemical_element, High momentum, Nuclear physics, Neon, Fragmentation (mass spectrometry), chemistry, Physique des particules élémentaires, Atomic physics, Nuclear Experiment, Charged current
Abstract

First observation is reported of semi-inclusive coherent diffractive charged current interactions of antineutrinos on neon nuclei. A sharp peaking towards zero is observed in the, 0, SCOPUS: ar.j, info:eu-repo/semantics/published

Published
1984

8. An investigation of the EMC effect using antineutrino interactions in deuterium and neon

Author

S. Natali, G. T. Jones, J. Sacton, P. Capiluppi, A. Romero, A. Vayaki, A. M. Cooper, C. Kochowski, M. L. Faccini-Turluer, K. Varvell, P. J. Fitch, P. Petiau, V. Flaminio, M.T. Fogli-Muciaccia, F. Romano, T. Azemoon, A. Marzari-Chiesa, A. M. Rossi, C. Vallée, J. H. Bartley, F. Bobisut, R. Pazzi, P. O. Hulth, K. L. Wernhard, V. Brisson, G. W. Van Apeldoorn, E. F. Clayton, R. A. Sansum, K. W. J. Barnham, J.G. Guy, Norbert Schmitz, M. A. Parker, M. Calicchio, F. Ruggieri, A. Tenner, R. P. Middleton, R. Wigmans, A. Petridis, P. Marage, H. Wachsmuth, F. W. Bullock, M. Neveu, E. Simopoulou, M. Aderholz, H. Klein, D. Bertrand, P. Kasper, L. Deck, G. Gerbier, S. W. O. Neale, J. Derkaoui, O. Villalobos-Baillie, D. Vignaud, D. Allasia, Jon-Paul R. Wells, H. Huzita, W. Venus, and A. Baldini

Subjects
Physics, Nuclear and High Energy Physics, Muon, Scattering, EMC effect, chemistry.chemical_element, Spectral line, Nuclear physics, Neon, chemistry, Deuterium, Physique des particules élémentaires, Atomic physics, Nucleon, Charged current, Particle Physics - Phenomenology
Abstract

Antineutrino interactions in BEBC are compared to look for differences between the differential cross sections per nucleon in neon and in deuterium. The identical geometries, beam spectra and muon identification criteria and acceptances allow comparison with very small systematic errors. The results are compared in detail with μ and e scattering data from EMC and SLAC. We find no rise in the ratio dσ/dx (ν Ne)/σ/dx (ν D2) at low x, independent of Q2 up to Q2 ∼ 14 GeV2. © 1984., 0, 58 auteurs, SCOPUS: ar.j, info:eu-repo/semantics/published

Published
1984

9. First observation of the production and decay of the Σc+

Author

J. H. Bartley, H. Leutz, M. Tyndel, T. Azemoon, Salvatore Nuzzo, Horst Wenninger, W. Van Doninck, A.G. Michette, F. W. Bullock, O. Erriquez, S. J. Sewell, C. Vander Velde-Wilquet, Marc Neveu, J. P. Baton, Pierre Marage, M. Calicchio, S. Natali, T. Francois, C. Kochowski, M. Iori, G. Gerbier, R. Belusevic, P. Petiau, W. Venus, V. Brisson, H. H. Bingham, F. Romano, Jean Sacton, A. M. Cooper, J.G. Guy, S. W. O'Neale, F. Ruggieri, G. T. Jones, N. J. Baker, M.T. Fogli-Muciaccia, J. Alitti, M.F. Votruba, Gaston Wilquet, D.C. Colley, J. Moreels, and D. Bertrand

Subjects
Physics, Nuclear and High Energy Physics, Particle decay, Pion, Proton, Meson, Hadron, Analytical chemistry, Elementary particle, Atomic physics, Nucleon, Charged particle
Abstract

An event with the decay chain Σ c + → Λ c + + π 0 , Λ c + → K − + p + π + , has been observed in an exposure of BEBC, equipped with a track sensitive target, to the wide band neutrino beam from the SPS at CERN. The event has a unique three constraint kinematic fit to the ΔS = − ΔQ reaction v + p → μ − + p + K − + π + + π + + π 0 with both gammas from the π 0 decay detected. The proton and other final state particles are identified. The masses are M ( Λ c + ) = 2290 ± 3 MeV/ c 2 , M ( Σ c + ) = 2457 ± 4 MeV/ c 2 and M ( Σ c + ) − M ( Λ c + ) = 168 ± 3 MeV/ c 2 . Including other data one obtains M ( Σ c ++ ) − M ( Σ c + ) = 0 ± 4 MeV/ c 2 .

Published
1980

10. The reaction π+p→π+pπ0π0 at 4 GeV/c: No evidence for a narrow ϵ

Author

J. Tuckmantel, F. Marchetto, G. Rinaudo, E. Menichetti, Giorgio Borreani, D. Maurizio, M. Suk, J.G. Guy, and A.E. Werbrouck

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Track (disk drive), Channel (broadcasting), Atomic physics
Abstract

The Track Sensitive Target technique has been used to isolate 5000 events from the reaction π+p→π+pπ0π0 at 4 GeV/c. Channel cross sections are measured. The data agree with predictions from phase-shift analyses of π+π− data: the effect of the S∗ is clearly seen. There is strong evidence against any narrow ϵ below 1 GeV/c2.

Published
1981

11. Positron production by muon neutrinos BEBC filled with a neon-hydrogen mixture

Author

H.H. Bingham, Jh Wickens, V. Brisson, T. Myndel, G. Gerbier, J. H. Bartley, S. W. O'Neale, P. Petiau, Salvatore Nuzzo, C. Vander Velde-Wilquet, O. Erriquez, C. Kochowski, D.C. Colley, T. W. Jones, D.J. Crennell, F. Romano, N.J. Bakker, G. Bertrand-Coremans, F. W. Bullock, A. Pullia, W. Venus, G.E. Kalmus, J. P. Baton, W. Cameron, G. T. Jones, M. Neveu, D.H. Davis, J.G. Guy, J. Alitti, S. J. Sewell, Jean Sacton, H. Mulkens, L. Lowe, A.G. Michette, and S. Natali

Subjects
Physics, Nuclear and High Energy Physics, Neon, Muon, Positron, chemistry, Hydrogen, Neutral current, Analytical chemistry, chemistry.chemical_element, Neutrino, Atomic physics
Abstract

For e + energy > 0.3 GeV and 10 GeV ƒ = (v μ + Ne → μ − e + )/(v μ + Ne → μ − ) = (0.41 ± 0.15)% ; (ii) 1.2 ± 0.5 neutral strange particles are produced per μ − e + event; (iii) the lifetime of possible positron-parent particles is −10 s (90% C.L.); (iv) the cross section for direct e + production via the neutral current is + , decaying into e + … is −3 times that for μ − production, implying M (L + ) > 10 GeV.

Published
1978

12. Limits on neutrino oscillations from a study of νe charged current interactions

Author

D.C. Colley, F. Romano, M. Tyndel, S. J. Sewell, A. G. Michette, O. Erriquez, J. H. Bartley, N. J. Baker, S. W. O'Neale, J. P. Baton, Salvatore Nuzzo, C. Kochowski, J. Alitti, P. Petiau, C. Vander Velde-Wilquet, A. M. Cooper, V. Brisson, A. Pullia, J.G. Guy, F. W. Bullock, W. Van Doninck, G. Gerbier, G. Bertrand-Coremans, G. T. Jones, W. Venus, H. Mulkens, Marc Neveu, Jean Sacton, and S. Natali

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Single electron, Particle physics, Large Hadron Collider, Neutrino beam, Neutrino oscillation, Charged current
Abstract

We have fully analysed all events with a single electron obtained in an exposure of BEBC to the 350 GeV wide-band neutrino beam at CERN. The data agrees well with expectations based on the calculated ν e flux and assuming μ−e universality. Using both the rate and the kinematic distributions, improved limits are set on ν e → ν X , ν μ → ν e , ν μ → ν τ mixing.

Published
1981

13. Dimuon events produced in high energy antineutrino interactions observed in BEBC

Author

D.C. Colley, P. Petiau, M. Tyndel, C. Vander Velde-Wilquet, S. Natali, D. Bertrand, J. H. Bartley, V. Brisson, S. J. Sewell, M. F. Votruba, N. Armenise, T. Francois, W. Van Doninck, L. Kluberg, Jean Sacton, M. Neveu, F. Romano, C. Kochowski, Salvatore Nuzzo, Gaston Wilquet, M. Iori, O. Erriquez, W. Venus, G. T. Jones, A. M. Cooper, M. Calicchio, J.G. Guy, A.G. Michette, Steve O'Neale, R. Belusevic, J. P. Baton, L. Lowe, G. Gerbier, N. J. Baker, M.T. Fogli-Muciaccia, and J. Alitti

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Muon, Meson, Hadron, Elementary particle, Nuclear physics, Baryon, Pair production, Antimatter, Physique des particules élémentaires, Nuclear Experiment, Lepton
Abstract

A study is presented of dimuon events from an exposure of BEBC to a wide band ν beam from the CERN SPS. These data double the available statistics on ν induced dilepton events observed in bubble chambers. The relative production rate and V0 yield have been measured and found to agree with previous experiments. The analysis of several kinematical variables shows that the gros features of the data agree with the predictions of the GIM model. Some indication exists that part of the signal could be due to quasi elastic production of the “beautiful baryon”, but the statistical significance is too weak to draw definitive conclusions. © 1980, All rights reserved., 0, SCOPUS: ar.j, info:eu-repo/semantics/published

Published
1980

14. A search for the radiative decay

Author

J.G. Guy, Gaston Wilquet, C. Mayeur, J. Schneps, R.M. Dowd, G. Wolsky, W.L. Knight, V.B. Fliagine, M. Govan, S.N. Tovey, A.J. Sanders, and P. Van Binst

Subjects
Physics, Nuclear physics, Nuclear and High Energy Physics, Photon, Radiative decay, Bubble chamber, State (functional analysis), Limit (mathematics)
Abstract

A 2.1 GeV/ c K − exposure in a heavy-liquid bubble chamber has been used to search for the final state Y ∗ (1327) → Λγ . No evidence was found for the existence of this state; an upper limit is placed on the cross-section of the reaction K − + p → Y ∗ (1327) + π + + π − + nπ o , n ⩾ 0 .

Published
1970

15. A measurement of the Ξ hyperon lifetimes and α parameters

Author

P. Van Binst, J. H. Bartley, M. Govan, R.M. Dowd, G. Wolsky, David J. Miller, C. Mayeur, F.R. Stannard, J.G. Guy, A.J. Sanders, S.N. Tovey, V.B. Fliagine, J. Schneps, W.L. Knight, Gaston Wilquet, and T. Azemoon

Subjects
Nuclear physics, Baryon, Physics, Nuclear and High Energy Physics, Particle decay, Meson, Branching fraction, Hadron, Hyperon, Elementary particle, Atomic physics, Nucleon
Abstract

In an experiment using a heavy liquid bubble chamber the Ξ hyperon lifetimes and α parameters were measured to be τΞo = (3.04 ± 0.230.26) × 10−10 sec, τΞ− = (1.73 ± 0.070.08) × 10−10 sec, αΞo = −0.84 ± 0.27 and αΞ− = −0.42 ± 0.11. These values agree with measurements which employed different techniques and are consistent with the predictions of the ΔI = 12 rule.

Published
1972

16. The ΛΛ and Ξ− p mass spectra produced by 2.2 GeV/c K− interactions on nuclei

Author

J. Schneps, S.N. Tovey, F.R. Stannard, Gaston Wilquet, G. Wolsky, D. J. Miller, J.G. Guy, A. Mann, W.L. Knight, and J. Canter

Subjects
Nuclear physics, Physics, Baryon, Nuclear and High Energy Physics, Antiparticle, Meson, Hadron, Mass spectrum, Hyperon, Elementary particle, Atomic physics, Nucleon
Abstract

The S = −2 dibaryon states ΛΛ and Ξ − p have been studied with more than double previous statistics. Earlier indications of an enhancement at M ΛΛ = 2.37 GeV/ c 2 are not confirmed.

Published
1975

17. A study of the reaction π+p → Δ++π0π0 at 4 GeV/c

Author

H. Leutz, C. Fisher, R. Ely, J. Tuckmantel, D. Grether, G. Rinaudo, Giorgio Borreani, D. Maurizio, F. Marchetto, J.W.G. Wignall, G. Gidal, Horst Wenninger, J.G. Guy, E. Menichetti, M. Suk, and S. K. Tuli

Subjects
Nuclear physics, Momentum, Physics, Nuclear and High Energy Physics, Atomic physics
Abstract

The reaction π+p → π+pπ0π0 is studied at an incident momentum of 4 GeV/c using the track-sensitive target technique. Peripheral Δ++π0π0 events are selected and comparisons made with predictions from π+π− data. These data allow a detailed analysis of the possible backgrounds contributing to the excess of events at low π0π0 masses.

Published
1979

18. Determination of the neutral to charged current cross section ratio for neutrino interactions on protons

Author

N. Armenise, M. Calicchio, O. Erriquez, M.T. Fogli-Muciaccia, S. Natali, S. Nuzzo, F. Ruggieri, R. Belusevic, D.C. Colley, G.T. Jones, S. O'Neale, S. Sewell, M.F. Votruba, D. Bertrand, J. Moreels, J. Sacton, C. Vander Velde-Wilquet, W. Van Doninck, V. Brisson, T. Francois, P. Petiau, A.M. Cooper, J.G. Guy, A.G. Michette, M. Tyndel, W. Venus, J.P. Baton, G. Gerbier, C. Kochowski, M. Neveu, H. Alamatsaz, T. Azemoon, J.H. Bartley, and M.A. Parker

Subjects
Nuclear and High Energy Physics, Physique des particules élémentaires
Abstract

SCOPUS: ar.j, info:eu-repo/semantics/published

Published
1983

Catalog

Books, media, physical & digital resources
See catalog results