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1. PRODUCTION OF CHARMED PARTICLES IN 250 GEV MU+-IRON INTERACTIONS

Author

H.E. Montgomery, D. Williams, J. Favier, J.H. Cobb, J. Gayler, J. M. Crespo, K. Moser, H. Pessard, H. Wahlen, C. Best, J. J. Aubert, W. Stockhausen, K. Rith, M. Henckes, X. De Bouard, M. Leenen, J.K. Davies, Klaus Hamacher, W.S.C. Williams, Jennifer S. Haas, M.I. Ferrero, E. Gabathuler, F.W. Brasse, H. E. Stier, L. Massonnet, A. W. Edwards, M. Schneegans, S.C. Brown, V. Gerhardt, J.M. Thenard, Stephen Wimpenny, P. R. Norton, M. Villers, P.F. Dalpiaz, J. C. Thompson, E. Boehm, J.G. Williamson, K.H. Becks, P. Dalpiaz, P. Payre, A.M. Osborne, J. Drees, P. Gregory, J. McNicholas, T. J. Sloan, G. Bassompierre, Cristiana Peroni, L. Urban, V. Korbel, Richard Mount, R. Gamet, W.D. Dau, W. Flauger, M. Edwards, Y. Declais, J. Carr, W. Mohr, U. Pietrzyk, P.J. Hayman, M. Whalley, U. Dosselli, R.W. Dobinson, Ulrich Landgraf, Claus Goessling, G. D'Agostini, G. Coignet, H. Minssieux, F. Combley, M. Maire, R. W. Clifft, and C. Broll

Subjects
Physics, Quark, Nuclear and High Energy Physics, Particle physics, Muon, Meson, Branching fraction, High Energy Physics::Phenomenology, Nuclear Theory, Charm quark, Nuclear physics, Particle decay, Pair production, High Energy Physics::Experiment, Nuclear Experiment, Nucleon, Particle Physics - Experiment
Abstract

Dimuon and trimuon events produced by the interaction of 250 GeV muons in an iron target have been studied and are shown to originate predominantly from charm production. The data are used to measure the contribution of charm to the nucleon structure function F 2 . The cross sections for real photoproduction ( Q 2 =0) of charm in the current fragmentation region are derived as a function of photon energy and are found to be ∼0.6% of the total, hadronic photoproduction cross section in this energy range. The measured cross sections are found to be well represented by the photon-gluon fusion model. The charmed quark fragmentation function is obtained by using this model to fit the measured decay muon energy distribution and is found to be well represented by exp(1.6±1.6) Z . The data are used to study the momentum distribution of the gluons in the nucleon. An upper limit of 1.4% (90% confidence level) is set on the branching ratio D→ μν and a model-dependent upper limit on the branching ratio F→ μν is derived.

Published
2016

2. The mechanical and thermal design for the MICE focusing solenoid magnet system

Author

J.H. Cobb, Anne Elizabeth Clark White, Holger Witte, G.D. Barr, Wing Man Lau, M.A. Green, R.S. Senanayake, Shiming Yang, and U. Bravar

Subjects
Materials science, business.industry, Physics, chemistry.chemical_element, Solenoid, Superconducting magnet, Condensed Matter Physics, Electronic, Optical and Magnetic Materials, Nuclear physics, Optics, chemistry, Magnet, Heat transfer, Water cooling, Electrical and Electronic Engineering, Beryllium, business, Liquid hydrogen, Beam (structure)
Abstract

The focusing solenoids for MICE surround energy absorbers that are used to reduce the transverse momentum of the muon beam that is being cooled within MICE. The focusing solenoids will have a warm-bore diameter of 470 mm. Within this bore is a flask of liquid hydrogen or a room temperature beryllium absorber. The focusing solenoid consists of two coils wound with a copper matrix Nb-Ti conductor originally designed for MRI magnets. The two coils have separate leads, so that they may be operated at the same polarity or at opposite polarity. The focusing magnet is designed so that it can be cooled with a pair of 1.5 W (at 4.2 K) coolers. The MICE cooling channel has three focusing magnets with their absorbers. The three focusing magnets will be hooked together in series for a circuit stored-energy of about 9.0 MJ. Quench protection for the focusing magnets is discussed. This report presents the mechanical and thermal design parameters for this magnet, including the results of unite element calculations of mechanical forces and heat flow in the magnet cold mass. © 2005 IEEE.

Published
2016

3. EVIDENCE FOR ANOMALOUS PROMPT PHOTONS IN DEEP INELASTIC MUON SCATTERING AT 200-GEV

Author

F. Combley, M. Maire, P.J. Hayman, Claus Gössling, M. Leenen, F.W. Brasse, J. C. Thompson, C. Broll, W.D. Dau, W. Mohr, H.E. Montgomery, M. Schneegans, W. Stockhausen, J. Gayler, E. Gabathuler, T. J. Sloan, C. Benchouk, J. Haas, J.K. Davies, Klaus Hamacher, H. Pessard, G. Bassompierre, V. Gerhardt, L. Urban, R. W. Clifft, M. I. Ferrero, P. Payre, Ulrich Landgraf, W. Flauger, J. Williamson, W.S.C. Williams, M. Henckes, C. Best, V. Korbel, J. Carr, Uwe Pietrzyk, M. Whalley, A. W. Edwards, J.M. Thenard, P. R. Norton, K. Rith, G.R. Court, C. Peroni, J. Nassalski, M. Edwards, U. Dosselli, G. D'Agostini, G. Coignet, A.M. Osborne, J. Favier, J. Drees, J. J. Aubert, X. De Bouard, R. Gamet, D. Williams, J.H. Cobb, H. Forsbach, S.C. Brown, H. E. Stier, K. Moser, E. Nagy, P. Gregory, J. McNicholas, Stephen Wimpenny, Gunnar Ingelman, Y. Declais, R.P. Muont, E. Böhm, H. Wahlen, K.H. Becks, Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), EMC, and Damoiseaux, Magali

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Muon, Photon, [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], 010308 nuclear & particles physics, Scattering, Hadron, Bremsstrahlung, Compton scattering, Inelastic scattering, Deep inelastic scattering, 01 natural sciences, 7. Clean energy, Nuclear physics, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics::Experiment, 010306 general physics, Particle Physics - Experiment
Abstract

The inclusive yield of photons has been measured from deep inelastic interactions of 200 GeV muons on hydrogen. After subtracting the contributions from hadron electromagnetic decays and Bethe-Heitler muon bremsstrahlung, residual photons are observed at low pT and low z at a mean level of 0.15±0.06 per interaction. The quark Compton scattering process is unable to explain the data, thus indicating an anomalous photon production. © 1989.

Published
2016

4. Measurement of the Q2, x and W2 dependence of single hadron production in deep inelastic muon scattering

Author

C. Broll, H.E. Montgomery, J. Gayler, J. M. Crespo, Uwe Pietrzyk, L. Massonnet, J. Favier, A. W. Edwards, J.M. Thenard, C. Best, P. R. Norton, Claus Gössling, H. Pessard, K. Moser, U. Dosselli, Klaus Hamacher, M. Leenen, F.W. Brasse, D. Williams, K.H. Becks, W.S.C. Williams, J.H. Cobb, Joshua Thompson, F. Combley, M. Maire, M. Schneegans, G. Coignet, W. Stockhausen, G. Bassompierre, V. Korbel, P. Payre, Richard Mount, H. Wahlen, A.M. Osborne, T. J. Sloan, Y. Declais, J. Carr, H. E. Stier, M. C. Edwards, Cristiana Peroni, H. Forsbach, Jennifer S. Haas, S.C. Brown, M. Whalley, R.W. Dobinson, R. Gamet, P. Dalpiaz, P.J. Hayman, G.R. Court, L. Urban, P. Gregory, Ulrich Landgraf, E. Böhm, Stephen Wimpenny, J. McNicholas, W.D. Dau, M. Villers, P.F. Dalpiaz, R. W. Clifft, K. Rith, J. Drees, M. Henckes, H. Minssieux, J.K. Davies, E. Nagy, M.I. Ferrero, V. Gerhardt, W. Mohr, J. J. Aubert, X. De Bouard, E. Gabathuler, and W. Flauger

Subjects
Physics, Quantum chromodynamics, Nuclear and High Energy Physics, Single variable, Particle physics, High energy, Muon, Scattering, Hadron, High Energy Physics::Phenomenology, Nuclear physics, High Energy Physics::Experiment, Scaling, Particle Physics - Experiment, Energy (signal processing)
Abstract

Measurements are presented of the distributions in scaled energy of the hadrons produced in high energy muon scattering. The observed dependence on x (non-factorisation) and Q 2 (scaling violation) is similar to that expected from next to leading order QCD calculations. These variations in the data can be equivalently represented by a dependence on the single variable W 2 .

Published
2016

5. A method for the detection of neutrino oscillations in a long-baseline experiment using energy measurements of nu(mu) charged current events

Author

J.H. Cobb

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Range (particle radiation), Flux, Nuclear physics, symbols.namesake, symbols, Measurements of neutrino speed, Neutrino, Rayleigh scattering, Neutrino oscillation, Instrumentation, Energy (signal processing), Charged current
Abstract

A method for detecting neutrino oscillations in a long-baseline experiment using the energy measurements of ν μ charged current events is described. The method uses the cosine component of the Rayleigh vector, Z , computed from the measured energies of events as an efficient, bin-free statistic. The statistical properties of Z and the range of applicability, in terms of sin 2 (2θ) and Δm 2 are discussed. Examples of the statistical limits which could be reached in an experiment are presented. It is shown that in certain circumstances a clear signal for neutrino oscillations can be obtained with only a minimal knowledge of the neutrino flux at the source.

Published
2016

6. QCD ANALYSIS OF THE STRUCTURE-FUNCTION F2 IN MUON NUCLEON-SCATTERING

Author

Uwe Pietrzyk, A. W. Edwards, W.S.C. Williams, A.M. Osborne, T. J. Sloan, K. Moser, J.R. Holt, J.M. Thenard, R.W. Dobinson, H. Jokisch, W. Mohr, J.G. Williamson, P. R. Norton, G. Bassompierre, R. W. Clifft, V. Korbel, J. Favier, L. Urban, S.C. Brown, Cristiana Peroni, Klaus Hamacher, M. C. Edwards, D. Williams, F. Combley, J.H. Cobb, H. Wahlen, P. Payre, K.H. Becks, M. Maire, C. Best, E. Böhm, J. Carr, H. Pessard, C. Broll, H.E. Montgomery, W. Flauger, M. Leenen, J. J. Aubert, J. Gayler, M. Whalley, Joshua Thompson, Claus Gössling, M. Schneegans, X. De Bouard, M. Henckes, P. Dalpiaz, E. Gabathuler, G. D'Agostini, G.R. Court, Richard Mount, U. Dosselli, G. Krikonis, J. M. Crespo, W.D. Dau, R. Gamet, M. Villers, P.F. Dalpiaz, G. Coignet, H. E. Stier, F.W. Brasse, J.K. Davies, M.I. Ferrero, L. Massonnet, Y. Declais, V. Gerhardt, W. Stockhausen, P. Gregory, Jennifer S. Haas, Ulrich Landgraf, P.J. Hayman, H. Minssieux, J. Drees, J. McNicholas, K. Rith, and Stephen Wimpenny

Subjects
Physics, Quantum chromodynamics, Nuclear and High Energy Physics, Particle physics, Muon, Scattering, Inelastic scattering, Gluon, Nuclear physics, High Energy Physics::Experiment, Charm (quantum number), Nucleon, Electron scattering, Particle Physics - Phenomenology
Abstract

A QCD analysis in leading and next to leading order of the structure function F 2 measured in deep inelastic muon nucleon scattering is presented. Taking into account several phenomenological uncertainties, including the gluon description and the charm contribution, fits to the data give values of the QCD scale parameter Λ LO in the range 7-–250 MeV. A consistent description of muon scattering and lower Q 2 electron scattering requires the presence of higher twist 1/ Q 2 contributions to the scale breaking which are then determined as a function of x from the data.

Published
2016

7. The ratio of the nucleon structure functions F2N for iron and deuterium

Author

M. Leenen, Joshua Thompson, M. Schneegans, G. D'Agostini, S.C. Brown, K. Rith, W. Stockhausen, Jennifer S. Haas, W.S.C. Williams, W.D. Dau, M. Henckes, H. E. Stier, J. J. Aubert, A.M. Osborne, Stephen Wimpenny, P. Payre, T. J. Sloan, D. Williams, H. Pessard, E. Böhm, C. Best, X. De Bouard, J. Favier, K. Moser, J.H. Cobb, R. Gamet, E. Gabathuler, C. Broll, J. Drees, H.E. Montgomery, J.K. Davies, M. Whalley, M.I. Ferrero, P.J. Hayman, J. Gayler, Klaus Hamacher, H. Wahlen, V. Gerhardt, G.R. Court, M. C. Edwards, F. Combley, M. Maire, K.H. Becks, Claus Gössling, Cristiana Peroni, M. Villers, F.W. Brasse, Ulrich Landgraf, R. W. Clifft, Richard Mount, J. McNicholas, H. Minssieux, Uwe Pietrzyk, Y. Declais, J.G. Williamson, U. Dosselli, A. W. Edwards, J.M. Thenard, V. Korbel, G. Coignet, P. R. Norton, J. Carr, G. Bassompierre, L. Urban, W. Mohr, R.W. Dobinson, and W. Flauger

Subjects
Physics, Nuclear and High Energy Physics, Muon, Scattering, Structure function, EMC effect, European Muon Collaboration, Nuclear physics, Deuterium, High Energy Physics::Experiment, Atomic physics, Nuclear Experiment, Nucleon, Particle Physics - Experiment
Abstract

Using the data on deep inelastic muon scattering on iron and deuterium the ratio of the nucleon structure functions F 2 N ( Fe )/ F 2 N ( D ) is presented. The observed x -dependence of this ratio is in disagreement with existing theoretical predictions.

Published
2016

8. A detailed study of the nucleon structure functions in deep inelastic muon scattering in iron

Author

U. Dosselli, H. E. Stier, J.H. Cobb, Cristiana Peroni, G. D'Agostini, S.C. Brown, G. Coignet, P. Payre, M. Edwards, R.W. Dobinson, K. Rith, U. Pietrzyk, J.G. Williamson, M. Whalley, E. Gabathuler, J. Favier, W. Mohr, J. Drees, R. W. Clifft, V. Korbel, G. Bassompierre, Richard Mount, Ulrich Landgraf, W.S.C. Williams, K. Moser, W.D. Dau, Claus Goessling, J. McNicholas, J. Carr, J. J. Aubert, H. Wahlen, A.M. Osborne, Y. Declais, T. J. Sloan, Stephen Wimpenny, C. Best, W. Flauger, C. Broll, H.E. Montgomery, H. Pessard, W. Stockhausen, X. De Bouard, L. Urban, J. Gayler, M. Leenen, J.K. Davies, Klaus Hamacher, M.I. Ferrero, Jennifer S. Haas, F. Combley, M. Maire, V. Gerhardt, K.H. Becks, A. W. Edwards, J.M. Thenard, M. Schneegans, P. R. Norton, M. Henckes, R. Gamet, P.J. Hayman, E. Boehm, F.W. Brasse, J. C. Thompson, Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), EMC, and BOMBAR, Claudine

Subjects
Quark, Quantum chromodynamics, Physics, Nuclear and High Energy Physics, Particle physics, Muon, [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], 010308 nuclear & particles physics, Scattering, EMC effect, Inelastic scattering, Deep inelastic scattering, 01 natural sciences, Nuclear physics, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], 010306 general physics, Nucleon, Particle Physics - Experiment
Published
2016

9. Quark and diquark fragmentation into neutral strange particles as observed in muon-proton interactions at 280 GeV

Author

D. Blum, F. G. Oakham, Michele Arneodo, B. Pietrzyk, J. Carr, H. E. Stier, J.M. Thenard, Paolo Giubellino, J. Favier, Claus Gössling, P. Grafström, P. R. Norton, T. Schröder, H. Brück, M. Whalley, P. B. Renton, A. Edwards, H. M. Braun, C. Pascaud, E. Böhm, Stephen Wimpenny, J. Williamson, K.H. Becks, J. J. Aubert, M. Pötsch, Kr Long, F. Dengler, Jc Thompson, R. W. Clifft, Christopher Bee, J. Shiers, J. Foster, V. Korbel, J. Pettingale, P. Payre, S. Wheeler, M.I. Ferrero, A. Manz, J. S. Chima, A. Schlagböhmer, J. Nassalski, W. Stockhausen, T. Ernst, C. Benchouk, B. Pönsgen, K. Schultze, N. Geddes, W. D. Dau, G. Kellner, D. Lanske, J. Drees, A. de la Torre, E. Rondio, G. Jancso, M. Studt, C. Broll, H.E. Montgomery, Gy. Wolf, J.K. Davies, D. Callebaut, J.H. Cobb, G. Eszes, Geoffrey Taylor, J. Gayler, P. Zank, F. Janata, I. Derado, Ulrich Landgraf, W. Wittek, E. Nagy, Richard Mount, F. W. Brasse, A. Jacholkowska, T. Dreyer, W. Mohr, H. Wahlen, S. Dahlgren, R. Gamet, J. G. Loken, E. Hagberg, W. Wallucks, Jane Coughlan, G. D'Agostini, F. Grard, V. Eckardt, L. Urban, K. Rith, Jozsef Toth, J. Figiel, Jennifer S. Haas, L. Paul, J. Beaufays, X. De Bouard, F. Combley, M. Maire, J.J. Dumont, W. Flauger, Ph. Heusse, P.J. Hayman, E. Gabathuler, M. Jaffre, F. Montanet, M. Schneegans, J. Krüger, U. Dosselli, Hans Calén, I. G. Bird, G. Coignet, A.M. Osborne, S. Kullander, T. J. Sloan, Cristiana Peroni, Roland Windmolders, C. Hoppe, A. Arvidson, Michael Düren, H. Pessard, L. Gustafsson, E. M. Kabuss, A. S. Johnson, H. Preissner, S.C. Brown, F.J. Hasert, N. Schmitz, G.R. Court, M. Edwards, P. Ribarics, and W.S.C. Williams

Subjects
Physics, Quark, Nuclear and High Energy Physics, Particle physics, Muon, Scattering, Hadron, Nuclear physics, Diquark, symbols.namesake, Fragmentation (mass spectrometry), symbols, Feynman diagram, High Energy Physics::Experiment, Nuclear Experiment, Particle Physics - Experiment
Abstract

The production of K 0 s, Λs and Λ s has been studied in a 280 GeV muon-proton scattering experiment with almost complete coverage of all kinematic regions. A study is made of the dependence of the multiplicities on the hadronic centre of mass energy, W , and of the Feynman x distributions. It is found that K 0 and Λ production is mostly central and increases strongly with W , whereas Λ production comes mainly from the remnant target system and is only weakly W dependent.

Published
2016

10. A search for free quarks in deep inelastic muon scattering

Author

Claus Goessling, W.S.C. Williams, J. McNicholas, H. E. Stier, H. Wahlen, M. Henckes, K. Moser, H. Pessard, Stephen Wimpenny, K.H. Becks, W. Stockhausen, C. Best, R.W. Dobinson, P.J. Hayman, R. W. Clifft, J. Favier, V. Korbel, F. Combley, M. Maire, Jennifer S. Haas, P. Payre, Klaus Hamacher, Richard Mount, Cristiana Peroni, S.C. Brown, M. Leenen, D. Williams, U. Dosselli, Y. Declais, G. Bassompierre, J.K. Davies, M.I. Ferrero, W. Mohr, J.H. Cobb, Uwe Pietrzyk, Joshua Thompson, W.D. Dau, J. Carr, G. von Holtey, V. Gerhardt, M. Schneegans, F.W. Brasse, A. W. Edwards, M. Whalley, L. Urban, G. D'Agostini, J.M. Thenard, A.M. Osborne, P. R. Norton, T. J. Sloan, G.R. Court, W. Flauger, G. Coignet, J. Drees, J. J. Aubert, E. Boehm, Ulrich Landgraf, H. Minssieux, X. De Bouard, E. Gabathuler, C. Broll, H.E. Montgomery, R. Gamet, M. C. Edwards, J. Gayler, K. Rith, Laboratoire d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), EMC, and BOMBAR, Claudine

Subjects
Quark, Physics, Nuclear and High Energy Physics, Particle physics, Large Hadron Collider, Muon, Spectrometer, [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], 010308 nuclear & particles physics, Scattering, Physics::Instrumentation and Detectors, EMC effect, 01 natural sciences, 7. Clean energy, Charged particle, Nuclear physics, Muon collider, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Physics::Accelerator Physics, High Energy Physics::Experiment, 010306 general physics, Nuclear Experiment, Particle Physics - Experiment
Abstract

A search was made at the CERN SPS for long-lived fractionally charged particles produced in deep inelastic muon interactions on a Be target using the existing muon beam line as a spectrometer. No such particles were found, leading to upper limits for the production cross section of the order of 10 −36 cm 2 for 200 GeV incident muon momentum and quark masses below 9 GeV for the 2 3 charge and 15 GeV for 1 3 charge.

Published
2016

11. TRANSVERSE-MOMENTUM OF CHARGED HADRONS OBSERVED IN DEEP INELASTIC MUON SCATTERING

Author

H. E. Stier, P. Gregory, Cristiana Peroni, M. Leenen, J. Drees, F. Combley, M. Maire, Joshua Thompson, M. Schneegans, U. Dosselli, D. Williams, C. Broll, P. Payre, E. Böhm, G.R. Court, P. Ghez, K. Moser, R. W. Clifft, H.E. Montgomery, J. Gayler, H. Pessard, W. Stockhausen, J.K. Davies, J.H. Cobb, M.I. Ferrero, L. Urban, V. Gerhardt, Stephen Wimpenny, U. Hahn, W. Flauger, E. Schlösser, P.F. Dalpiaz, C. Best, K. Rith, Uwe Pietrzyk, A. W. Edwards, Jennifer S. Haas, J.M. Thenard, P.J. Hayman, P. R. Norton, W. Mohr, K.H. Becks, A.M. Osborne, T. J. Sloan, H. Wahlen, H. Jokisch, Ulrich Landgraf, J. J. Aubert, W.S.C. Williams, J. McNicholas, Richard Mount, M. Henckes, X. De Bouard, E. Gabathuler, J. M. Crespo, G. Coignet, S.C. Brown, Y. Declais, W.D. Dau, Claus Gössling, F.W. Brasse, L. Massonnet, M. C. Edwards, P. Dalpiaz, V. Korbel, G. Bassompierre, J. Carr, R. Gamet, J. Favier, Klaus Hamacher, and R.W. Dobinson

Subjects
Momentum, Nuclear physics, Physics, Nuclear and High Energy Physics, Transverse plane, High energy, Muon, Scattering, Transverse momentum, Hadron, Perturbative QCD, Nuclear Experiment, Particle Physics - Experiment
Abstract

The transverse momenta of charged hadrons produced in high energy muon-proton scattering have been studied. The average squared transverse momentum 〈 p 2 ⊥ 〉 shows a strong dependence on z = E h / v characteristic of intrinsic momentum effects and a significant rise as a function of s = W 2 . The W 2 , q 2 , x and z dependences of the data are compared with the predictions of a perturbative QCD model.

Published
2016

12. Progress on the Design and Fabrication of the MICE Focusing Magnets

Author

J.H. Cobb, W. Lau, Shiming Yang, D.E. Baynham, Michael A. Green, and T.W. Bradshaw

Subjects
Physics, business.industry, Solenoid, Superconducting magnet, Condensed Matter Physics, Electronic, Optical and Magnetic Materials, Mandrel, Nuclear magnetic resonance, Optics, Magnet, Quadrupole, Physics::Accelerator Physics, Ionization cooling, Electrical and Electronic Engineering, business, Polarity (mutual inductance), Beam (structure)
Abstract

The Muon Ionization Cooling Experiment (MICE) focusing solenoid magnets focus the muon beam within the MICE cooling channel on a liquid or solid absorber that is within the warm bore of solenoid. The focusing magnet has a warm bore of 470 mm. This magnet consists of two coils 210-mm long that is separated by an aluminum mandrel that is 200 mm long. Each of the coils has its own leads. The coils may be operated in either the non-flip mode (solenoid mode with both coils at the same polarity) or the flip mode (quadrupole focusing mode where both coils are at opposite polarity). This report describes the focusing solenoid magnet design that will be built by the vendor. The progress on the construction of the first of the focusing magnets will also be discussed in this report. Ultimately three of these magnets will be built. These magnets will be cooled using a pair 1.5 W (at 4.2 K) pulse tube coolers. © 2006 IEEE.

Published
2016

13. An experimental limit on the intrinsic charm component of the nucleon

Author

A. W. Edwards, J.M. Thenard, P. R. Norton, E. Böhm, J. M. Crespo, J. J. Aubert, R.W. Dobinson, M. Villers, P.F. Dalpiaz, R. W. Clifft, P.J. Hayman, X. De Bouard, L. Massonnet, Claus Gössling, E. Gabathuler, J. Favier, F.W. Brasse, W. Stockhausen, M. Henckes, L. Urban, C. Broll, H.E. Montgomery, K.H. Becks, W. Flauger, P. Payre, Jennifer S. Haas, H. E. Stier, Ulrich Landgraf, J. Gayler, P. Ghez, F. Combley, M. Maire, U. Dosselli, K. Rith, Richard Mount, W.D. Dau, Cristiana Peroni, J.G. Williamson, J.K. Davies, Klaus Hamacher, K. Moser, R. Gamet, P. Gregory, M.I. Ferrero, J. Drees, Y. Declais, V. Gerhardt, G. Bassompierre, H. Wahlen, W. Mohr, W.S.C. Williams, C. Best, H. Minssieux, M. Leenen, Joshua Thompson, M. Schneegans, G. D'Agostini, A.M. Osborne, T. J. Sloan, H. Pessard, G. Coignet, M. Whalley, M. C. Edwards, S.C. Brown, D. Williams, J.H. Cobb, J. McNicholas, P. Dalpiaz, Stephen Wimpenny, V. Korbel, J. Carr, and Uwe Pietrzyk

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Photon, Component (thermodynamics), High Energy Physics::Phenomenology, Gluon, Nuclear physics, Cross section (physics), Content (measure theory), High Energy Physics::Experiment, Limit (mathematics), Charm (quantum number), Nucleon, Nuclear Experiment, Particle Physics - Experiment
Abstract

Charm production has been studied through multimuon events produced in 250 GeV μ + -interactions. The measured dimuon cross section is in agreement with the photon gluon fusion model at low values of Bjorken x within statistical and systematic errors. At larger values of x Bi the data do not support the magnitude of intrinsic charm used to explain hadro-production of charm. Upper limits on the intrinsic charm content of the nucleon are derived from the data.

Published
2016

14. Ab initio liquid hydrogen muon cooling simulations with ELMS

Author

J.H. Cobb, S. J. Holmes, W. W. M. Allison, Robert B. Palmer, and Richard C. Fernow

Subjects
Physics, Nuclear and High Energy Physics, Cross section (physics), Muon, Bunches, Scattering, Ionization, Monte Carlo method, Ab initio, Liquid hydrogen, Computational physics
Abstract

This paper presents new theoretical results on the passage of muons through liquid hydrogen which have been confirmed in a recent experiment. These are used to demonstrate that muon bunches may be compressed by ionization cooling more effectively than suggested by previous calculations. Muon cooling depends on the differential cross section for energy loss and scattering of muons. We have calculated this cross section for liquid H 2 from first principles and atomic data, avoiding traditional assumptions. Thence, 2D probability maps of energy loss and scattering in thicknesses of less than a mm are derived by folding, and stored in a database. Large first-order correlations between energy loss and scattering are found for H 2, which are absent in other simulations. This code is named ELMS (energy loss and multiple scattering). Using these maps single particle trajectories may be tracked by Monte Carlo with stepsize of 1 mm or less. This processor has been inserted into the cooling code ICOOL. Significant improvements in 6D muon cooling are predicted compared with previous predictions based on GEANT. This is examined in various geometries. The large correlation effect is found to have only a small effect on cooling. The experimental scattering observed for liquid H 2 in the MUSCAT experiment is found to be in good agreement with the ELMS prediction, but in poor agreement with GEANT4 simulation. © 2007 IOP Publishing Ltd.

Published
2016

15. The NuMI neutrino beam

Author

J. Urheim, David Petyt, S. Moed Sher, S. Phan-Budd, A. Sousa, Francisco Yumiceva, R. L. Talaga, N. E. Devenish, P. J. Litchfield, S. R. Mishra, M.L. Wong-Squires, J. A. Musser, S. Avvakumov, R. Reilly, M. Olsen, William L. Barrett, T. Yang, D. E. Jaffe, G. Tzanakos, R. H. Milburn, J. Hylen, B. Viren, S. C. Tognini, G. Koizumi, Niki Saoulidou, W. A. Mann, S. Murgia, J. K. Nelson, Maury Goodman, B. Baller, A. Perch, D. Michael, C. M. Castromonte, S. Childress, J. Johnstone, J. Biggs, R. J. Nichol, Alec Habig, P. Schreiner, D. A. Jensen, M. M. Medeiros, M. A. Thomson, K. Vaziri, Stanley G. Wojcicki, J. P. Cravens, R. H. Bernstein, A. Para, A. V. Devan, J. J. Evans, M. M. Pfützner, P. Shanahan, A. Holin, D. Crane, H. R. Gallagher, N. Tagg, Christopher G. White, R. C. Webb, J. A. Thompson, E. Falk, A. Radovic, C. Rosenfeld, D. A. Harris, M. P. Andrews, M. C. Sanchez, R. B. Pahlka, Brajesh C Choudhary, E. A. Peterson, R. Ford, Leigh H. Whitehead, N. Poonthottathil, A. C. Weber, A. R. Erwin, G.D. Barr, Junwei Huang, L. Loiacono, J. Schneps, D. Bogert, D. S. Ayres, R. Hatcher, K. Bourkland, L. H. Whitehead, J. K. De Jong, J.H. Cobb, Karol Lang, G. Vogel, Harvey B Newman, R. Andrews, P. Adamson, D. J. Harding, D. Pushka, A. Marchionni, Scott Osprey, X. Tian, I. Anghel, I. Trostin, Gregory J Pawloski, R. A. Rameika, John Miller, S. M. S. Kasahara, M. V. Diwan, Jorge G. Morfin, Juergen Thomas, N. Mayer, Ahmed Ibrahim, S. V. Cao, A. Aurisano, G. M. Irwin, C. James, Kevin Anderson, G. J. Feldman, J. R. Meier, N. Graf, R. Webber, Caleb Smith, J. M. Paley, W. Smart, A. A. Wehmann, D. Cronin-Hennessy, A. Stefanik, J. A. Nowak, D. Tinsley, P. Gouffon, R. Mehdiyev, P. Vahle, R. A. Gomes, T. Patzak, G. Tassotto, D. J. Boehnlein, T. H. Fields, C. Laughton, E. Villegas, L. Sauer, R. Zwaska, D. Naples, S. Hays, J. O׳Connor, M. D. Messier, C. L. McGivern, D. Indurthy, Rakesh Sharma, J. Ratchford, C. D. Moore, Z. Isvan, L. Mualem, W. H. Miller, G. J. Bock, D. Torretta, Sacha E Kopp, R. Gran, L. Corwin, S. L. Mufson, G. Lefeuvre, V. Zarucheisky, V. Bocean, T. Kafka, M. Bishai, M. Orchanian, K. Grzelak, M. V. Frohne, P. Prieto, J. Hartnell, B. C. Barish, R. Ducar, Philip Harris, H. A. Rubin, R. B. Patterson, K. Ruddick, Joao A B Coelho, V. Garkusha, D. Augustine, Ž Pavlović, D. Schoo, A. E. Kreymer, P. Lucas, W. P. Oliver, Marvin L Marshak, Ken Heller, M. J. Murtagh, M. Kordosky, S. R. Hahn, Andrew Blake, N. Grossman, A. Timmons, A. Schreckenberger, Carlos Escobar, R. K. Plunkett, X. Qiu, R. Toner, B. Rebel, AstroParticule et Cosmologie (APC (UMR_7164)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7), AstroParticule et Cosmologie ( APC - UMR 7164 ), Centre National de la Recherche Scientifique ( CNRS ) -Institut National de Physique Nucléaire et de Physique des Particules du CNRS ( IN2P3 ) -Observatoire de Paris-Université Paris Diderot - Paris 7 ( UPD7 ) -Commissariat à l'énergie atomique et aux énergies alternatives ( CEA ), and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)

Subjects
Accelerator Physics (physics.acc-ph), Target, Nuclear and High Energy Physics, Particle physics, beam monitoring, Physics::Instrumentation and Detectors, [PHYS.PHYS.PHYS-ACC-PH]Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], FOS: Physical sciences, beam transport, neutrino: beam, Neutrino beam, 7. Clean energy, 01 natural sciences, NuMI, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), beam: alignment, Long Baseline, [ PHYS.HEXP ] Physics [physics]/High Energy Physics - Experiment [hep-ex], 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], hardware, Fermilab, [ PHYS.PHYS.PHYS-ACC-PH ] Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], Neutrinos, 010306 general physics, Instrumentation, activity report, Physics, 010308 nuclear & particles physics, Monitoring system, Beam, Main injector, Main Injector, Physics::Accelerator Physics, Physics - Accelerator Physics, High Energy Physics::Experiment, Neutrino, Beam (structure), performance
Abstract

International audience; This paper describes the hardware and operations of the Neutrinos at the Main Injector (NuMI) beam at Fermilab. It elaborates on the design considerations for the beam as a whole and for individual elements. The most important design details of individual components are described. Beam monitoring systems and procedures, including the tuning and alignment of the beam and NuMI long-term performance, are also discussed.

Published
2016

16. Observation in the MINOS far detector of the shadowing of cosmic rays by the sun and moon

Author

Xian-Rong Huang, T.C. Nicholls, Mcd Sanchez, R. A. Gomes, V. K. Semenov, J. K. Nelson, S. R. Mishra, P. Vahle, S. Cavanaugh, R. J. Nichol, M. V. Diwan, D. J. Boehnlein, T. M. Raufer, John Marshall, D. A. Jensen, A. Holin, C. Backhouse, G. M. Irwin, T. Yang, Alec Habig, R. Zwaska, P. Gouffon, G. J. Feldman, D. Bogert, C. Rosenfeld, M. D. Messier, P. Adamson, L. Whitehead, S. M. S. Kasahara, Karol Lang, S. Budd, Christopher G. White, R. Toner, D. G. Michael, B. Rebel, Gregory J Pawloski, J. Ilic, Harvey B Newman, J. L. Thron, A. Himmel, Z. Isvan, L. Mualem, C. James, E. Falk, G. J. Bock, E. A. Peterson, M. Dorman, D. Cherdack, V.A. Ryabov, R. Hatcher, P. A. Rodrigues, C. Andreopoulos, G. Lefeuvre, M. A. Thomson, D. Naples, P. Shanahan, L. Loiacono, T. Kafka, P. Lucas, Stanley G. Wojcicki, R. P. Litchfield, N. Grant, J. Hylen, M. C. Goodman, J. R. Meier, N. Tagg, J. Schneps, G.D. Barr, I. Z. Danko, G.F. Pearce, J. J. Evans, Juergen Thomas, Carlos Escobar, S. J. Coleman, R. Mehdiyev, Warner A. Miller, J. M. Paley, R. K. Plunkett, B. Viren, R. L. Talaga, A. Sousa, N. E. Devenish, P. J. Litchfield, J. K. De Jong, J.H. Cobb, P. Schreiner, R. C. Webb, E. Grashorn, J. Urheim, C. R. Bower, Philip Harris, J. A. Musser, A. Godley, R. Pittam, B. C. Choudhary, M. V. Frohne, H. A. Rubin, R. B. Patterson, M. Bishai, S. Childress, W. P. Oliver, A. M. McGowan, A. C. Weber, J. Ratchford, C. D. Moore, Douglas Wright, William L. Barrett, L. Corwin, S. L. Mufson, B. Bock, M. Orchanian, A. E. Kreymer, Marvin L Marshak, Z. Krahn, D. E. Jaffe, G. Tinti, N. Mayer, M. Kordosky, Andrew Blake, W. A. Mann, John C. Mitchell, G. Tzanakos, Matthew L Strait, K. Grzelak, G. Koizumi, Joao A B Coelho, Sacha E Kopp, J. Reichenbacher, R. Gran, J. Hartnell, Daniel P Cronin-Hennessy, D. S. Ayres, H. R. Gallagher, and D. A. Harris

Subjects
High Energy Astrophysical Phenomena (astro-ph.HE), Physics, Muon, Detector, FOS: Physical sciences, Astronomy, Astronomy and Astrophysics, Cosmic ray, Astrophysics, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), Astrophysics - Solar and Stellar Astrophysics, MINOS, Celestial coordinate system, Physics::Space Physics, Shadow, High Energy Physics::Experiment, Angular resolution, Astrophysics::Earth and Planetary Astrophysics, Interplanetary magnetic field, Astrophysics - High Energy Astrophysical Phenomena, Solar and Stellar Astrophysics (astro-ph.SR)
Abstract

The shadowing of cosmic ray primaries by the the moon and sun was observed by the MINOS far detector at a depth of \unit[2070]{mwe} using 83.54 million cosmic ray muons accumulated over 1857.91 live-days. The shadow of the moon was detected at the \unit[5.6]{$\sigma$} level and the shadow of the sun at the \unit[3.8]{$\sigma$} level using a log-likelihood search in celestial coordinates. The moon shadow was used to quantify the absolute astrophysical pointing of the detector to be 0.17\pm 0.12^\circ. Hints of Interplanetary Magnetic Field effects were observed in both the sun and moon shadow., Comment: Submitted to AstroParticle Physics

Published
2011

17. The Effect of Magnetic Field on the Position of HTS Leads and the Cooler in the Services Tower of the MICE Focusing Magnet

Author

Martin A. Green, J.H. Cobb, P. Lau, Shiming Yang, W. Lau, T.W. Bradshaw, D.E. Baynham, and Holger Witte

Subjects
Physics, High-temperature superconductivity, business.industry, Solenoid, Superconducting magnet, Condensed Matter Physics, Rotation, Electronic, Optical and Magnetic Materials, law.invention, Magnetic field, Engineering, Optics, Nuclear magnetic resonance, law, Condensed Matter::Superconductivity, Magnet, Heat exchanger, Electromagnetic shielding, Electrical and Electronic Engineering, business
Abstract

The MICE focusing solenoids have three 4 K coolers (two for the superconducting magnet and one for the liquid absorber) and four HTS leads that feed the current to the focusing coils. The focusing solenoids produce large radial external fields when they operate with the polarity of the two coils in opposition (the gradient or flip mode). When the MICE focusing coils operate at the same polarity (the solenoid or non-flip mode), the fields are much smaller and parallel to the axis of the solenoid. The worst-case magnetic field affects the selection of the cooler and the HTS leads. This magnetic field can also determine the height of the service towers that house the three coolers and the four HTS leads. This paper shows the criteria used for Cooler selection, HTS lead selection, and the position of both the cooler and leads with respect to the solenoid axis of rotation. © 2008 IEEE.

Published
2008

18. Electron-muon ranger: performance in the MICE muon beam

Author

D. Adams, A. Alekou, M. Apollonio, R. Asfandiyarov, G. Barber, P. Barclay, A. de Bari, R. Bayes, V. Bayliss, P. Bene, R. Bertoni, V.J. Blackmore, A. Blondel, S. Blot, M. Bogomilov, M. Bonesini, C.N. Booth, D. Bowring, S. Boyd, T.W. Bradshaw, U. Bravar, A.D. Bross, F. Cadoux, M. Capponi, T. Carlisle, G. Cecchet, C. Charnley, F. Chignoli, D. Cline, J.H. Cobb, G. Colling, N. Collomb, L. Coney, P. Cooke, M. Courthold, L.M. Cremaldi, S. Debieux, A. DeMello, A. Dick, A. Dobbs, P. Dornan, F. Drielsma, F. Filthaut, T. Fitzpatrick, P. Franchini, V. Francis, L. Fry, A. Gallagher, R. Gamet, R. Gardener, S. Gourlay, A. Grant, J.S. Graulich, J. Greis, S. Griffiths, P. Hanlet, O.M. Hansen, G.G. Hanson, T.L. Hart, T. Hartnett, T. Hayler, C. Heidt, M. Hills, P. Hodgson, C. Hunt, C. Husi, A. Iaciofano, S. Ishimoto, G. Kafka, D.M. Kaplan, Y. Karadzhov, Y.K. Kim, Y. Kuno, P. Kyberd, J.-B. Lagrange, J. Langlands, W. Lau, M. Leonova, D. Li, A. Lintern, M. Littlefield, K. Long, T. Luo, C. Macwaters, B. Martlew, J. Martyniak, F. Masciocchi, R. Mazza, S. Middleton, A. Moretti, A. Moss, A. Muir, I. Mullacrane, J.J. Nebrensky, D. Neuffer, A. Nichols, R. Nicholson, L. Nicola, E. Noah Messomo, J.C. Nugent, A. Oates, Y. Onel, D. Orestano, E. Overton, P. Owens, V. Palladino, J. Pasternak, F. Pastore, C. Pidcott, M. Popovic, R. Preece, S. Prestemon, D. Rajaram, S. Ramberger, M.A. Rayner, S. Ricciardi, T.J. Roberts, M. Robinson, C. Rogers, K. Ronald, K. Rothenfusser, P. Rubinov, P. Rucinski, H. Sakamato, D.A. Sanders, R. Sandström, E. Santos, T. Savidge, P.J. Smith, P. Snopok, F.J.P. Soler, D. Speirs, T. Stanley, G. Stokes, D.J. Summers, J. Tarrant, I. Taylor, L. Tortora, Y. Torun, R. Tsenov, C.D. Tunnell, M.A. Uchida, G. Vankova-Kirilova, S. Virostek, M. Vretenar, P. Warburton, S. Watson, C. White, C.G. Whyte, A. Wilson, H. Wisting, X. Yang, A. Young, M. Zisman, Science and Technology Facilities Council (STFC), Adams, D., Alekou, A., Apollonio, M., Asfandiyarov, R., Barber, G., Barclay, P., De Bari, A., Bayes, R., Bayliss, V., Bene, P., Bertoni, R., Blackmore, V. J., Blondel, A., Blot, S., Bogomilov, M., Bonesini, M., Booth, C. N., Bowring, D., Boyd, S., Bradshaw, T. W., Bravar, U., Bross, A. D., Cadoux, F., Capponi, M., Carlisle, T., Cecchet, G., Charnley, C., Chignoli, F., Cline, D., Cobb, J. H., Colling, G., Collomb, N., Coney, L., Cooke, P., Courthold, M., Cremaldi, L. M., Debieux, S., Demello, A., Dick, A., Dobbs, A., Dornan, P., Drielsma, F., Filthaut, F., Fitzpatrick, T., Franchini, P., Francis, V., Fry, L., Gallagher, A., Gamet, R., Gardener, R., Gourlay, S., Grant, A., Graulich, J. S., Greis, J., Griffiths, S., Hanlet, P., Hansen, O. M., Hanson, G. G., Hart, T. L., Hartnett, T., Hayler, T., Heidt, C., Hills, M., Hodgson, P., Hunt, C., Husi, C., Iaciofano, A., Ishimoto, S., Kafka, G., Kaplan, D. M., Karadzhov, Y., Kim, Y. K., Kuno, Y., Kyberd, P., Lagrange, J. -B., Langlands, J., Lau, W., Leonova, M., Li, D., Lintern, A., Littlefield, M., Long, K., Luo, T., Macwaters, C., Martlew, B., Martyniak, J., Masciocchi, F., Mazza, R., Middleton, S., Moretti, A., Moss, A., Muir, A., Mullacrane, I., Nebrensky, J. J., Neuffer, D., Nichols, A., Nicholson, R., Nicola, L., Messomo, E. N., Nugent, J. C., Oates, A., Onel, Y., Orestano, D., Overton, E., Owens, P., Palladino, V., Pasternak, J., Pastore, F., Pidcott, C., Popovic, M., Preece, R., Prestemon, S., Rajaram, D., Ramberger, S., Rayner, M. A., Ricciardi, S., Roberts, T. J., Robinson, M., Rogers, C., Ronald, K., Rothenfusser, K., Rubinov, P., Rucinski, P., Sakamato, H., Sanders, D. A., Sandstrom, R., Santos, E., Savidge, T., Smith, P. J., Snopok, P., Soler, F. J. P., Speirs, D., Stanley, T., Stokes, G., Summers, D. J., Tarrant, J., Taylor, I., Tortora, L., Torun, Y., Tsenov, R., Tunnell, C. D., Uchida, M. A., Vankova-Kirilova, G., Virostek, S., Vretenar, M., Warburton, P., Watson, S., White, C., Whyte, C. G., Wilson, A., Wisting, H., Yang, X., Young, A., Zisman, M., and Palladino, Vittorio

Subjects
Technology, Physics - Instrumentation and Detectors, Traverse, Physics::Instrumentation and Detectors, FOS: Physical sciences, Electron, Cooling channel, 01 natural sciences, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), Particle identification method, Particle identification methods, Calorimeters, DESIGN, Particle tracking detectors, 0103 physical sciences, Ionization cooling, Detectors and Experimental Techniques, Nuclear Experiment, 010306 general physics, GeneralLiterature_REFERENCE(e.g.,dictionaries,encyclopedias,glossaries), Instrumentation, Instruments & Instrumentation, QC, Mathematical Physics, Physics, Calorimeter, Range (particle radiation), Muon, Science & Technology, 010308 nuclear & particles physics, Detector, Instrumentation and Detectors (physics.ins-det), Nuclear & Particles Physics, Particle tracking detector, Experimental High Energy Physics, Physics::Accelerator Physics, High Energy Physics::Experiment, Performance of High Energy Physics Detectors, Beam (structure)
Abstract

The Muon Ionization Cooling Experiment (MICE) will perform a detailed study of ionization cooling to evaluate the feasibility of the technique. To carry out this program, MICE requires an efficient particle-identification (PID) system to identify muons. The Electron-Muon Ranger (EMR) is a fully-active tracking-calorimeter that forms part of the PID system and tags muons that traverse the cooling channel without decaying. The detector is capable of identifying electrons with an efficiency of 98.6%, providing a purity for the MICE beam that exceeds 99.8%. The EMR also proved to be a powerful tool for the reconstruction of muon momenta in the range 100-280 MeV/$c$., 22 pages, 19 figures

Published
2015

19. Search for the proton decay mode p→νK in Soudan 2

Author

H.R. Gallagher, S. Wakeley, C.B. Brooks, G. J. Alner, Marvin L Marshak, T. Joffe–Minor, M.H. Schub, A. Napier, G.D. Barr, J. L. Thron, Warner A. Miller, C. Garcia-Garcia, L. Mualem, W.W.M. Allison, C. Bode, M. C. Goodman, N. P. Longley, R. Gran, K. Ruddick, R.J. Cotton, U.M. Wielgosz, G. F. Pearce, W. Leeson, G. Villaume, T. H. Fields, H. Courant, D. Wall, L. E. Price, A. Stassinakis, R. H. Milburn, J.H. Cobb, J. Schneps, W. P. Oliver, E. A. Peterson, D. M. DeMuth, V. Vassiliev, William L. Barrett, P. J. Litchfield, W. A. Mann, R. Seidlein, N. West, D. S. Ayres, P. M. Border, D. A. Petyt, T. Kafka, S. M S Kasahara, and H. Tom

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Proton decay, Analytical chemistry, High resolution
Abstract

We have searched for the proton decay mode p {yields} {nu} K{sup +} using the one-kiloton Soudan 2 high resolution calorimeter. Contained events obtained from a 3.56 kiloton-year fiducial exposure through June 1997 are examined for occurrence of a visible K{sup +} track which decays at rest into {mu}{sup +}{nu} or {pi}{sup +}{pi}{sup 0}. We found one candidate event consistent with background, yielding a limit, {tau}/B(p {yields} {nu} K{sup +})>4.3x10{sup 31} years at 90% CL with no background subtraction.

Published
1998

20. nuSTORM - Neutrinos from STORed Muons: Proposal to the Fermilab PAC

Author

C. N. Booth, C. Martin, A. C. Weber, S. B. Boyd, T.K. Ghosh, A. Kurup, P. Kyberd, C. Mariani, M. Geelhoed, A. D. Bross, M. J. Wilking, U. K. Yang, A. Izmaylov, Gordon H. Hanson, C. Tunnell, D. Adey, J.-B. Lagrange, M. Ravonel, P. Stamoulis, M.A. Palmer, L. L. Kormos, M. Hartz, Milorad Popovic, N. Vassilopoulos, S. J. Brice, Elena Wildner, I. Taylor, Andrea Donini, J.J. Gómez-Cadenas, Sergei Striganov, A. Dobbs, A. Bravar, F. Dufour, Jaroslaw Pasternak, Tanaji Sen, R. Asfandiyarov, A. Laing, H.A. Tanaka, Patrick Huber, Jan T. Sobczyk, S. Söldner-Rembold, Y. Uchida, Luca Stanco, Silvia Pascoli, T. Kobilarcik, S. A. Bogacz, David R. Smith, S. Ricciardi, J. A. Hernando Morata, Paul Hodgson, N.V. Mokhov, Porfidio Hernández, W. J. Murray, C. Touramanis, J. Dobson, P. Rubinov, S. Bhadra, A. Korzenev, J.H. Cobb, David Colling, P. J. Dornan, N. McCauley, Stephen J. Parke, M. A.M. Rayner, J. M. Link, Y. Karadzhov, A. Blondel, Gareth J. Barker, M. George, P. F. Harrison, Marcos Dracos, Kendall Mahn, R. Bayes, J.P. Martin, A. de Gouvea, David Neuffer, P. N. Ratoff, Walter Winter, A. Liud, Franck Cadoux, Pavel Snopok, Jorge G. Morfin, A. Cervera, E. M. Santos, P. Coloma, C. Rogers, A. Haesler, Sanjib Kumar Agarwalla, Etam Noah, F. J. P. Soler, V. Blackmore, J. K. Sedgbeer, Y. Kuno, John Evans, H. Cease, J. J. Back, Joachim Kopp, K. T. McDonald, Rob Edgecock, L. Soby, R. J. Nichol, M. Sorel, M. O. Wascko, A. Sato, Patrick Smith, S. R. Mishra, Kenneth Long, L. Coney, O. Mena, Eric Baussan, E. Scantamburlo, Charles M. Ankenbrandt, and Y. Mori

Subjects
Physics, Accelerator physics, Accelerator Physics (physics.acc-ph), Particle physics, Sterile neutrino, Muon, Physics - Instrumentation and Detectors, hep-ex, Physics::Instrumentation and Detectors, FOS: Physical sciences, Instrumentation and Detectors (physics.ins-det), Accelerators and Storage Rings, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), Muon collider, Physics::Accelerator Physics, Muon neutrino, Physics - Accelerator Physics, High Energy Physics::Experiment, Fermilab, Neutrino, physics.ins-det, Electron neutrino, physics.acc-ph
Abstract

The nuSTORM facility has been designed to deliver beams of electron neutrinos and muon neutrinos (and their anti-particles) from the decay of a stored muon beam with a central momentum of 3.8 GeV/c and a momentum acceptance of 10%. The facility is unique in that it will: 1. Allow searches for sterile neutrinos of exquisite sensitivity to be carried out; 2. Serve future long- and short-baseline neutrino-oscillation programs by providing definitive measurements of electron neutrino and muon neutrino scattering cross sections off nuclei with percent-level precision; and 3. Constitutes the crucial first step in the development of muon accelerators as a powerful new technique for particle physics. The document describes the facility in detail and demonstrates its physics capabilities. This document was submitted to the Fermilab Physics Advisory Committee in consideration for Stage I approval. The nuSTORM facility has been designed to deliver beams of electron neutrinos and muon neutrinos (and their anti-particles) from the decay of a stored muon beam with a central momentum of 3.8 GeV/c and a momentum acceptance of 10%. The facility is unique in that it will: 1. Allow searches for sterile neutrinos of exquisite sensitivity to be carried out; 2. Serve future long- and short-baseline neutrino-oscillation programs by providing definitive measurements of electron neutrino and muon neutrino scattering cross sections off nuclei with percent-level precision; and 3. Constitutes the crucial first step in the development of muon accelerators as a powerful new technique for particle physics. The document describes the facility in detail and demonstrates its physics capabilities. This document was submitted to the Fermilab Physics Advisory Committee in consideration for Stage I approval.

Published
2013
Full Text
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21. Conceptual design of a non scaling fixed field alternating gradient accelerator for protons and carbon ions for charged particle therapy

Author

P. A. McIntosh, Ken Peach, Sam Tygier, S. Machida, T. R. Edgecock, Jürgen Pozimski, J.H. Cobb, Boris Vojnovic, Shrikant Pattalwar, N. Bliss, Akram Khan, Rebecca Seviour, Takeichiro Yokoi, P. A. Wilson, Christopher Prior, Bleddyn Jones, I.S.K. Gardner, J. Strachan, R. J. Barlow, C. Rogers, Suzanne Sheehy, Hywel Owen, David Kelliher, Carol Johnstone, J. Rochford, Morteza Aslaninejad, R. Fenning, Jaroslaw Pasternak, Mark A. Hill, Holger Witte, C. D. Beard, Thomas Jones, S.L. Smith, M. J. Easton, Peach, KJ, Aslaninejad, M, Barlow, RJ, Beard, CD, Wilson, P, and Yokoi, T

Subjects
Nuclear and High Energy Physics, Physics and Astronomy (miscellaneous), Quantitative Biology::Tissues and Organs, medicine.medical_treatment, Physics::Medical Physics, chemistry.chemical_element, Computer Science::Digital Libraries, 01 natural sciences, 7. Clean energy, Linear particle accelerator, Ion, Nuclear physics, Conceptual design, 0103 physical sciences, medicine, lcsh:Nuclear and particle physics. Atomic energy. Radioactivity, 010306 general physics, Particle beam, QC, Physics, Accelerator physics, Intermediate energy proton and ion accelerators [4.3], Particle therapy, 010308 nuclear & particles physics, Surfaces and Interfaces, Accelerators and Storage Rings, Charged particle, 3. Good health, Particle Therapy, Particle accelerator for medical applications, chemistry, non-scaling FFAG, EMMA, lcsh:QC770-798, Physics::Accelerator Physics, Protons, Carbon ions, Atomic physics, Carbon, Accelerator Applications (AccApplic) [4]
Abstract

The conceptual design is presented for a particle accelerator for medical applications (PAMELA), an accelerator facility to deliver protons and carbon ions efficiently for charged particle therapy (CPT). The design uses the novel features of nonscaling fixed field alternating gradient (ns-FFAG) technology to improve performance over existing facilities. The fixed field allows more rapid acceleration than is possible with a synchrotron (kHz rather than Hz) while still allowing variable energy extraction from 70 to 250 MeV for protons, and 110 to 440 MeV / u for carbon, with excellent dose control and fast transverse scanning. This should result in greater patient through- put owing to shorter treatment durations and perhaps fewer treatment sessions (fractions), and eventually lower cost.

Published
2013

22. nuSTORM - Neutrinos from STORed Muons: Letter of Intent to the Fermilab Physics Advisory Committee

Author

Y. Kuno, Sanjib Kumar Agarwalla, Etam Noah, F. J. P. Soler, Milorad Popovic, David R. Smith, L. Coney, C. Tunnell, J. M. Link, N.V. Mokhov, P. Kyberd, Charles M. Ankenbrandt, A. Dobbs, S. J. Brice, J.H. Cobb, Silvia Pascoli, Y. Mori, Jaroslaw Pasternak, A. Bross, Walter Winter, A. Bravar, M. O. Wascko, P. Rubinov, S. A. Bogacz, Sergei Striganov, R. Bayes, H. Cease, Joachim Kopp, K. Long, A. Sato, Jorge G. Morfin, V. Blackmore, Patrick Huber, Edirlei Machado dos Santos, A. Blondel, A. de Gouvea, David Neuffer, and J.-B. Lagrange

Subjects
Nuclear physics, Physics, Sterile neutrino, Particle physics, Pion, Muon, Physics::Accelerator Physics, High Energy Physics::Experiment, Neutrino Factory, Fermilab, Neutrino, Neutrino oscillation, Storage ring
Abstract

The idea of using a muon storage ring to produce a high-energy ({approx_equal} 50 GeV) neutrino beam for experiments was first discussed by Koshkarev in 1974. A detailed description of a muon storage ring for neutrino oscillation experiments was first produced by Neuffer in 1980. In his paper, Neuffer studied muon decay rings with E{sub {mu}} of 8, 4.5 and 1.5 GeV. With his 4.5 GeV ring design, he achieved a figure of merit of {approx_equal} 6 x 10{sup 9} useful neutrinos per 3 x 10{sup 13} protons on target. The facility we describe here ({nu}STORM) is essentially the same facility proposed in 1980 and would utilize a 3-4 GeV/c muon storage ring to study eV-scale oscillation physics and, in addition, could add significantly to our understanding of {nu}{sub e} and {nu}{sub {mu}} cross sections. In particular the facility can: (1) address the large {Delta}m{sup 2} oscillation regime and make a major contribution to the study of sterile neutrinos, (2) make precision {nu}{sub e} and {bar {nu}}{sub e} cross-section measurements, (3) provide a technology ({mu} decay ring) test demonstration and {mu} beam diagnostics test bed, and (4) provide a precisely understood {nu} beam for detector studies. The facility is the simplest implementation of the Neutrino Factory concept. In our case, 60 GeV/c protons are used to produce pions off a conventional solid target. The pions are collected with a focusing device (horn or lithium lens) and are then transported to, and injected into, a storage ring. The pions that decay in the first straight of the ring can yield a muon that is captured in the ring. The circulating muons then subsequently decay into electrons and neutrinos. We are starting with a storage ring design that is optimized for 3.8 GeV/c muon momentum. This momentum was selected to maximize the physics reach for both oscillation and the cross section physics. See Fig. 1 for a schematic of the facility.

Published
2012

23. The MICE Muon Beam on ISIS and the beam-line instrumentation of the Muon Ionization Cooling Experiment

Author

Maurizio Bonesini, J. Tarrant, A. Oates, A. Iaciofano, A. Blondel, Kenneth Long, Simone Gilardoni, Robert B. Palmer, D. Huang, T. L. Hart, S. York, R. Beuselinck, N. Collomb, Alessandra Lombardi, A. Wilson, L. M. Cremaldi, S. Griffiths, Chris Rogers, L. Howlett, H.G. Kirk, M. Khaleeq, A. DeMello, Michael A. Green, Malcolm Ellis, T.W. Bradshaw, H. Sakamoto, E. Gschwendtner, A. Lintern, C. Nelson, A. de Bari, A. Fish, Fr Pastore, Koji Yoshimura, V. Kasey, T. Hayler, P. Snopok, A. Sato, V. Blackmore, D. Clark, R. Nicholson, T. Sashalmi, J. J. Nebrensky, G. Vankova-Kirilova, Mario Parisi, G. Lucchini, P.A. Cooke, P. Owens, Paul Fraser Harrison, S. Watson, F. Masciocchi, D. A. Sanders, T. Yano, Maurizio Vretenar, A. Tonazzo, David Colling, C. D. Tunnell, K. Tilley, I. Russinov, K. Walaron, Matthew Hills, I. Mullacrane, A. Cirillo, R. Sandstrom, X. Yang, P. J. Dornan, G. Gregoire, J. Rochford, H. Wisting, C. Petitjean, Yasuo Fukui, P. Hodgson, Michael S. Zisman, Alessandro Manfredini, Richard Fletcher, L. Coney, U. Bravar, Y. Mori, P.J. Smith, D. Kolev, G. Kafka, T. Carlisle, E. Overton, A. D. Bross, J. Alexander, Max Robinson, R. Mazza, M. Courthold, A. Nichols, S. Greenwood, Y. Kuno, C. Macwaters, G. G. Hanson, C. N. Booth, P. Hanlet, W. Lau, Andrew Moss, R. Tsenov, K. Lee, A.K. Jamdagni, A. Jones, Y. Karadzhov, S. Fayer, M. Yoshida, Juan C. Gallardo, P. Kyberd, R. Hare, Patrick Janot, A. Alekou, G. Charnley, C. Heidt, S. Ricciardi, P. Gruber, Federico Ferri, Daniel M. Kaplan, Jaroslaw Pasternak, David B. Cline, Derun Li, Ben Freemire, S. Blot, H. Haseroth, G.J. Barber, Rebecca Seviour, David Neuffer, P. Bene, R. Gamet, Frank Filthaut, D.E. Baynham, M. Apollonio, Domizia Orestano, Takashi Matsushita, Holger Witte, V. Grichine, Christopher J. White, S. Ramberger, E. McKigney, R. J. Apsimon, D. Adey, F. J. P. Soler, J. S. Graulich, Klaus Hanke, L. Tortora, Mike Rayner, Steve Virostek, B. Martlew, R. Garoby, Milorad Popovic, Y. Ivaniouchenkov, Shiming Yang, Franck Cadoux, D. J. Summers, S. B. Boyd, Maiko Takahashi, Rob Edgecock, Yagmur Torun, A. Dobbs, Shota Suzuki, M. A.C. Cummings, V. Verguilov, F. Strati, F. Y. Xu, L. Wang, S.A. Kahn, R. Bertoni, M. Capponi, S. X. Zheng, T.J. Roberts, G. Cecchet, W. Spensley, S. Geer, Alfred Moretti, Yasar Onel, T. Savidge, S. Ishimoto, J. Leaver, P. Drumm, Yongsun Kim, V. Palladino, David Forrest, Robert Rimmer, F. Paleari, J.H. Cobb, D. Adams, Robert D. Preece, I. Clark, J. J. Back, M. Littlefield, M. Bogomilov, P. Barclay, APC - Neutrinos, Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-AstroParticule et Cosmologie (APC (UMR_7164)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Bene, Pierre, Blondel, Alain, Cadoux, Franck, Graulich, Jean-Sébastien, Grichine, Vladimir, Gschwendtner-Riegler, Edda, Masciocchi, Florian, Sandstrom, Rikard, Verguilov, Vassil Zlatilov, Wisting, Havard, Bogomilov, M, Karadzhov, Y, Kolev, D, Russinov, I, Tsenov, R, Vankova Kirilova, G, Wang, L, Xu, Fy, Zheng, Sx, Bertoni, R, Bonesini, M, Ferri, F, Lucchini, G, Mazza, R, Paleari, F, Strati, F, Palladino, V, Cecchet, G, de Bari, A, Capponi, M, Cirillo, A, Iaciofano, A, Manfredini, A, Parisi, Mario, Orestano, Domizia, Pastore, F, Tonazzo, A, Tortora, L, Mori, Y, Kuno, Y, Sakamoto, H, Sato, A, Yano, T, Yoshida, M, Ishimoto, S, Suzuki, S, Yoshimura, K, Filthaut, F, Garoby, R, Gilardoni, S, Gruber, P, Hanke, K, Haseroth, H, Janot, P, Lombardi, A, Ramberger, S, Vretenar, M, Bene, P, Blondel, A, Cadoux, F, Graulich, J, Grichine, V, Gschwendtner, E, Masciocchi, F, Sandstrom, R, Verguilov, V, Wisting, H, Petitjean, C, Seviour, R, Alexander, J, Charnley, G, Collomb, N, Griffiths, S, Martlew, B, Moss, A, Mullacrane, I, Oates, A, Owens, P, White, C, York, S, Adams, D, Apsimon, R, Barclay, P, Baynham, De, Bradshaw, Tw, Courthold, M, Drumm, P, Edgecock, R, Hayler, T, Hills, M, Ivaniouchenkov, Y, Jones, A, Lintern, A, Macwaters, C, Nelson, C, Nichols, A, Preece, R, Ricciardi, S, Rochford, Jh, Rogers, C, Spensley, W, Tarrant, J, Tilley, K, Watson, S, Wilson, A, Forrest, D, Soler, Fjp, Walaron, K, Cooke, P, Gamet, R, Alekou, A, Apollonio, M, Barber, G, Beuselinck, R, Clark, D, Clark, I, Colling, D, Dobbs, A, Dornan, P, Fayer, S, Fish, A, Hare, R, Greenwood, S, Jamdagni, A, Kasey, V, Khaleeq, M, Leaver, J, Long, K, Mckigney, E, Matsushita, T, Pasternak, J, Sashalmi, T, Savidge, T, Takahashi, M, Blackmore, V, Carlisle, T, Cobb, Jh, Lau, W, Rayner, M, Tunnell, Cd, Witte, H, Yang, S, Booth, Cn, Hodgson, P, Howlett, L, Nicholson, R, Overton, E, Robinson, M, Smith, P, Adey, D, Back, J, Boyd, S, Harrison, P, Ellis, M, Kyberd, P, Littlefield, M, Nebrensky, Jj, Bross, Ad, Geer, S, Neuffer, D, Moretti, A, Popovic, M, Cummings, Mac, Roberts, Tj, Demello, A, Green, Ma, Li, D, Virostek, S, Zisman, M, Freemire, B, Hanlet, P, Huang, D, Kafka, G, Kaplan, Dm, Snopok, P, Torun, Y, Blot, S, Kim, Yk, Bravar, U, Onel, Y, Cline, D, Fukui, Y, Lee, K, Yang, X, Rimmer, Ra, Cremaldi, Lm, Gregoire, G, Hart, Tl, Sanders, Da, Summers, Dj, Coney, L, Fletcher, R, Hanson, Gg, Heidt, C, Gallardo, J, Kahn, S, Kirk, H, Palmer, Rb, Parisi, M., Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC)-AstroParticule et Cosmologie (APC (UMR_7164)), Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Kolev, D., Palladino, Vittorio, AstroParticule et Cosmologie (APC (UMR_7164)), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), and Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Accelerator Physics (physics.acc-ph), Accelerator Applications, Physics::Instrumentation and Detectors, FOS: Physical sciences, ddc:500.2, 01 natural sciences, law.invention, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), Calorimeters, law, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Ionization cooling, 010306 general physics, Instrumentation, Mathematical Physics, QC, Physics, Muon, 010308 nuclear & particles physics, Instrumentation and methods for time-of-flight (TOF) spectroscopy, Particle accelerator, Accelerators and Storage Rings, 13. Climate action, Muon collider, Experimental High Energy Physics, ComputingMethodologies_DOCUMENTANDTEXTPROCESSING, Physics::Accelerator Physics, Neutrino Factory, Physics - Accelerator Physics, Instrumentation for particle accelerators and storage rings - low energy (linear accelerators, cyclotrons, electrostatic accelerators), Calorimeters, Instrumentation and methods for time-of-flight (TOF) spectroscopy, Accelerator Applications, High Energy Physics::Experiment, International Muon Ionization Cooling Experiment, Instrumentation for particle accelerators and storage rings - low energy (linear accelerators, cyclotrons, electrostatic accelerators), Beam (structure), Lepton
Abstract

The international Muon Ionization Cooling Experiment (MICE), which is under construction at the Rutherford Appleton Laboratory (RAL), will demonstrate the principle of ionization cooling as a technique for the reduction of the phase-space volume occupied by a muon beam. Ionization cooling channels are required for the Neutrino Factory and the Muon Collider. MICE will evaluate in detail the performance of a single lattice cell of the Feasibility Study 2 cooling channel. The MICE Muon Beam has been constructed at the ISIS synchrotron at RAL, and in MICE Step I, it has been characterized using the MICE beam-instrumentation system. In this paper, the MICE Muon Beam and beam-line instrumentation are described. The muon rate is presented as a function of the beam loss generated by the MICE target dipping into the ISIS proton beam. For a 1 V signal from the ISIS beam-loss monitors downstream of our target we obtain a 30 KHz muon rate, with a neglible pion contamination in the beam. The international Muon Ionization Cooling Experiment (MICE), which is under construction at the Rutherford Appleton Laboratory (RAL), will demonstrate the principle of ionization cooling as a technique for the reduction of the phase-space volume occupied by a muon beam. Ionization cooling channels are required for the Neutrino Factory and the Muon Collider. MICE will evaluate in detail the performance of a single lattice cell of the Feasibility Study 2 cooling channel. The MICE Muon Beam has been constructed at the ISIS synchrotron at RAL, and in MICE Step I, it has been characterized using the MICE beam-instrumentation system. In this paper, the MICE Muon Beam and beam-line instrumentation are described. The muon rate is presented as a function of the beam loss generated by the MICE target dipping into the ISIS proton beam. For a 1 V signal from the ISIS beam-loss monitors downstream of our target we obtain a 30 KHz instantaneous muon rate, with a neglible pion contamination in the beam.

Published
2012

24. Progress on the superconducting magnets for the MICE cooling channel

Author

X L Guo, D.E. Baynham, Heng Pan, P. Lau, Derun Li, Wing Man Lau, H Wu, Martin A. Green, Michael S. Zisman, Fengyu Xu, J.H. Cobb, L. Wang, T.W. Bradshaw, X K Liu, S X Zheng, Steve Virostek, and Shiming Yang

Subjects
Physics, History, Muon, Electromagnet, Physics::Instrumentation and Detectors, Superconducting magnet, Computer Science Applications, Education, law.invention, Nuclear physics, Beamline, law, Electrical equipment, Magnet, Physics::Accelerator Physics, Ionization cooling, High Energy Physics::Experiment, Physics::Atomic Physics, Beam (structure)
Abstract

The muon ionization cooling experiment (MICE) consists of a target, a beam line, a pion decay channel, the MICE cooling channel. Superconducting magnets are used in the pion decay channel and the MICE cooling channel. This report describes the MICE cooling channel magnets and the progress in the design and fabrication of these magnets. The MICE cooling channel consists of three types of superconducting solenoids; the spectrometer solenoids, the coupling solenoids and the focusing solenoids. The three types of magnets are being fabricated in the United States, China, and the UK respectively. The spectrometer magnets are used to analyze the muon beam before and after muon cooling. The coupling magnets couple the focusing sections and keep the muon beam contained within the iris of the RF cavities that are used to recover the muon momentum lost during ionization cooling. The focusing magnets focus the muon beam in the center of a liquid hydrogen absorber. The first of the cooling channel magnets will be operational in MICE in the spring of 2010. © 2010 IOP Publishing Ltd.

Published
2010

25. First results from the Soudan 2 proton decay experiment

Author

L. E. Price, J.H. Cobb, G. F. Pearce, D. Rosen, L. M. Tupper, Donald H. Perkins, D. Roback, C.B. Brooks, B. Saitta, R. N. Gray, K. Ruddick, P.D. Shield, A. Napier, J. L. Thron, P. J. Litchfield, D. P. Benjamin, M. Lowe, C. Garcia-Garcia, M. A. Thomson, R. H. Giles, G.D. Barr, J. Kochocki, F. V. Lopez, J. W. Dawson, David Ja Cockerill, L. McMaster, J. Schneps, Marvin L Marshak, K. A. Johns, H. Courant, J. L. Schlereth, M. C. Goodman, W. W.M. Allison, T. Kafka, D. Schmid, I. Ambats, S. Heppelmann, D. J. Jankowski, L. Balka, R. H. Milburn, V. W. Edwards, G. J. Alner, W. P. Oliver, N. Sundaralingam, E. A. Peterson, B. Dahlin, Warner A. Miller, William L. Barrett, W. A. Mann, N. P. Longley, N. West, D. S. Ayres, S. J. Werkema, P. M. Border, N. Hill, Edward May, Michael Shupe, S. M. S. Kasahara, and T. H. Fields

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Physics::Instrumentation and Detectors, Proton decay, High Energy Physics::Phenomenology, Astrophysics::Cosmology and Extragalactic Astrophysics, Solar neutrino problem, Nuclear physics, Neutrino detector, High Energy Physics::Experiment, Astrophysics::Earth and Planetary Astrophysics, Neutrino, Neutrino oscillation
Abstract

First results on contained neutrino interactions are presented from the Soudan 2 proton decay experiment. 20 neutrino events have been found in a fiducial exposure of 0.29 kton years.

Published
1991

26. PAMELA - A model for an FFAG based hadron therapy machine

Author

B. Cywinski, B. Jones, Ken Peach, J.H. Cobb, Jürgen Pozimski, A. Elliott, M.W. Poole, Karen J. Kirkby, Melvyn Folkard, Takeichiro Yokoi, Roger P. Webb, Rob Edgecock, Roger Barlow, G. McKenna, Borivoj Vojnovic, and I.S.K. Gardner

Subjects
Medical services, Physics, Nuclear physics, Hadron therapy, Medical treatment, Tumour therapy, Carbon ion beam, Systems engineering, Biomedical equipment, EMMA, Rf system
Abstract

Approximately one third of the world's 15000 accelerators are used for tumour therapy and other medical applications [1]. The characteristics of FFAGs make them ideally suited to such applications, as the much smaller magnet size and greater compactness offers considerable cost and operational benefits. In the first stage the work on PAMELA will focus on the optimization of the FFAG design to deliver the specific machine parameters demanded by therapy applications. In this phase of the PAMELA project the effort will concentrate on the design of a semi-scaling type FFAGs to deliver a 450 MeV/u carbon ion beam, including detailed lattice and tracking studies. The second stage will use the existing expertise in the BASROC consortium [2] to undertake a design of the magnets and RF system for PAMELA. An outline of the overall concept of PAMELA will be discussed and the actual status of the work will be presented. ©2007 IEEE.

Published
2007

27. A Cost-Effective Design for a Neutrino Factory

Author

J. S. Berg, J.H. Cobb, Robert B. Palmer, Richard C. Fernow, Juan C. Gallardo, Michael S. Zisman, H. Witte, Kevin Paul, S.A. Kahn, H.G. Kirk, S. A. Bogacz, Shlomo Caspi, and David Neuffer

Subjects
Accelerator Physics (physics.acc-ph), Physics, Nuclear and High Energy Physics, Muon, Physics and Astronomy (miscellaneous), Physics::Instrumentation and Detectors, Nuclear engineering, FOS: Physical sciences, Particle accelerator, Surfaces and Interfaces, Energy storage, Linear particle accelerator, Cost savings, law.invention, Nuclear physics, law, lcsh:QC770-798, Physics::Accelerator Physics, lcsh:Nuclear and particle physics. Atomic energy. Radioactivity, Neutrino Factory, High Energy Physics::Experiment, Physics - Accelerator Physics, Neutrino, Storage ring
Abstract

There have been active efforts in the U.S., Europe, and Japan on the design of a Neutrino Factory. This type of facility produces intense beams of neutrinos from the decay of muons in a high energy storage ring. In the U.S., a second detailed Feasibility Study (FS2) for a Neutrino Factory was completed in 2001. Since that report was published, new ideas in bunching, cooling and acceleration of muon beams have been developed. We have incorporated these ideas into a new facility design, which we designate as Study 2B (ST2B), that should lead to significant cost savings over the FS2 design., 46 pages, 38 figures; to be submitted to Physical Review Special Topics: Accelerators and Beams

Published
2005

28. Development of a compact scintillator hodoscope with wavelength-shifting fibre read-out

Author

D. Wahl, C.P. Achenbach, and J.H. Cobb

Subjects
Physics, Nuclear and High Energy Physics, Photomultiplier, Muon, business.industry, Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, Detector, FOS: Physical sciences, Cosmic ray, Scintillator, Wavelength, Optics, Hodoscope, Development (differential geometry), Nuclear Experiment (nucl-ex), business, Instrumentation, Nuclear Experiment
Abstract

We report on the prototyping of a plastic scintillator hodoscope with wavelength-shifting fibre read-out by a multi-anode photomultiplier as part of the development of a detector for cosmic ray muons to be carried aboard an aircraft. Light yield and light attenuation measurements on single- and double-clad wavelength-shifting fibres were performed. Low power, low-threshold, discriminators were designed. A prototype 16-channel hodoscope with two planes was built and tested with cosmic rays. After correcting for geometrical factors a global intrinsic efficiency of $\epsilon > 98$ % was obtained in both planes. The overall performance of the hodoscope proved it to be well suited for the {\sc Adler} experiment to measure the high altitude muon flux., Comment: submitted to Nucl. Instr. and Meth. in Phys. Res. A

Published
2004

29. Letter of intent to build an off-axis detector to study nu(mu) ---> nu(e) oscillations with the NuMI neutrino beam

Author

P. Lucas, Panagiotis Spentzouris, Patrick Huber, J. Schneps, A. De Santo, D. G. Michael, David Petyt, P. Slattery, S. Avvakumov, H. Minakata, H. J. Kang, R. Hatcher, Hiroshi Nunokawa, C. W. Walter, D. S. Ayres, K. S. McFarland, Adam Para, T. Joffe-Minor, T. Kafka, V. J. Guarino, R. Shrock, P. deBarbaro, S. Manly, B. Kayser, Gary Drake, W. Metcalf, R. A. Richards, N.V. Mokhov, V. Makeev, R. L. Talaga, Sacha E Kopp, S. Menary, N. Morgan, P. Shanahan, R. Ray, H. R. Gallagher, N. Tagg, P. Kasper, C. Cueva, G.D. Barr, I. Trostin, D. A. Harris, S.M. Grimes, A. Marchionni, J. Cooper, A. C. Weber, Walter Winter, D. Naples, B. C. Choudhary, W. Sakumoto, Stephen J. Parke, Kirk T. McDonald, H. S. Budd, Stanley G. Wojcicki, P. J. Litchfield, G. Tzanakos, Juergen Thomas, Manfred Lindner, K-B. Luk, D. E. Reyna, K. Ruddick, A. Mann, S. M. Seun, Raymond Lee, V. Scarpino, J. Hylen, E. Blucher, S. Childress, E. Kearns, Marvin L Marshak, K.H. Hicks, David B. Cline, D. Carey, A.K. Opper, Carl H. Albright, F. DeJongh, R. Svoboda, M. C. Goodman, Ken Heller, J. K. Nelson, D.S. Carman, V. Ryabov, Karol Lang, E. A. Peterson, G. F. Pearce, J.H. Cobb, M. Zielinski, K. Lee, S. Geer, J. L. Thron, G. M. Irwin, Philip Harris, C. Bromberg, Kate Scholberg, G. J. Feldman, T. Patzak, C.R. Brune, N. Giokaris, S. Pordes, P. M. Border, A. Bodek, K. M. Heeger, S. M. S. Kasahara, Alexandre Lebedev, Caren Hagner, D. M. DeMuth, Kai Zuber, Thomas R. Chase, N. Pearson, R. Imlay, J. Urheim, Alec Habig, V. Paolone, L. Mualem, and G. Ginther

Subjects
Nuclear physics, Physics, Particle physics, Physics::Instrumentation and Detectors, MINOS, Measurements of neutrino speed, High Energy Physics::Experiment, Solar neutrino problem, Neutrino, Neutrino oscillation, NuMI, Particle detector, Lepton
Abstract

The NuMI neutrino beam line and the MINOS experiment represent a major investment of US High Energy Physics in the area of neutrino physics. The forthcoming results could decisively establish neutrino oscillations as the underlying physics mechanism for the atmospheric $\numu$ deficit and provide a precise measurement of the corresponding oscillation parameters, $\dmsq23$ and $\sinsq2t23$.neutrino sector may well be within our reach. The full potential of the NuMI neutrino beam can be exploited by complementing the MINOS detector, under construction, with a new detector(s) placed at some off-axis position and collecting data in parallel with MINOS. The first phase of the proposed program includes a new detector, optimized for $\nue$ detection, with a fiducial mass of the order of 20 kton and exposed to neutrino and antineutrino beams. In a five year run its sensitivity to the $\numutonue$ oscillations will be at least a factor of ten beyond the current limit. The future direction of the program will depend on the results of this first phase, but it is very likely that it will be a combination of a significant increase of the neutrino beam intensity via an upgraded proton source and an increase of the detector mass by a factor of five or so. Depending on the circumstances, the goals of Phase II may be a further increase of the sensitivity of a search for $\numutonue$ oscillations, or, perhaps, a measurement of the CP violating phase $\delta$ in the lepton sector.

Published
2002

30. Search for neutron-antineutron oscillations using multiprong events in Soudan 2

Author

K. Ruddick, David Petyt, J. L. Thron, Warner A. Miller, B. Speakman, S. P. Wakely, M. C. Sanchez, H. R. Gallagher, S. M. S. Kasahara, A. Sousa, J.H. Cobb, William L. Barrett, J. Chung, T. Kafka, W. A. Mann, H. Courant, G. J. Alner, P. M. Border, Marvin L Marshak, N. West, T. H. Fields, G. F. Pearce, A. Napier, W. P. Oliver, D. S. Ayres, D. M. DeMuth, J. Schneps, W.W.M. Allison, E. A. Peterson, T. Joffe-Minor, M. C. Goodman, R. Gran, P. J. Litchfield, L. Mualem, and R. H. Milburn

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Annihilation, Oscillation, FOS: Physical sciences, Antineutron, Lower limit, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), High Energy Physics::Experiment, Neutron, Atmospheric neutrino, Bar (unit)
Abstract

We have searched for neutron-antineutron oscillations using the 5.56 fiducial kiloton-year exposure of the Soudan 2 iron tracking calorimeter. We require candidate n-nbar occurrences to have .GE. 4 prongs (tracks and showers) and to have kinematics compatible with nbar-N annihilation within a nucleus. We observe five candidate events, with an estimated background from atmospheric neutrino and cosmic ray induced events of 4.5 \pm 1.2 events. Previous experiments with smaller exposures observed no candidates, with estimated background rates similar to this experiment. We set a lifetime lower limit for oscillation time in iron: T_A(Fe) > 7.2x10^{31} years. The corresponding lower limit for oscillation of free neutrons is ��_{n-nbar} > 1.3x10^8 seconds., 21 pages, 7 figures

Published
2002

31. The MINOS scintillator calorimeter system

Author

K.V. Alexandrov, L. E. Price, J.H. Cobb, H. R. Gallagher, N. Diaczenko, Niki Saoulidou, D. A. Harris, V. K. Semenov, D.F. Anderson, G. Koizumi, G. F. Pearce, I. Shein, J. K. Nelson, A. R. Erwin, D. J. Boehnlein, C. Laughton, A. Nozdrin, R. Halsall, P.J. Dervan, T. Nicholls, Warner A. Miller, D. Bogert, G. J. Alner, Raymond Lee, R. Ducar, C. Nelson, P. Lucas, S. Childress, D. Naples, V. Kochetkov, W.W.M. Allison, M. Drew, N. Hill, John Oliver, E. Falk Harris, G. J. Bock, P. Adamson, Y.F. Lai, M. Kordosky, V. Smirnitsky, A. Marchionni, N. Giokaris, T. Durkin, N. Grossman, Philip Harris, G. I. Merzon, Ruben Saakyan, Sacha E Kopp, C. Arroyo, S. Bilenky, V. J. Guarino, J. Hylen, A. Para, N. Felt, S. R. Mishra, M. C. Goodman, M. V. Diwan, Z. Krumstein, V. A. Ryabov, P. S. Miyagawa, P. J. Litchfield, T. Hu, A. Napier, Kevin Anderson, D. S. Ayres, R.H. Bernstien, T. Patzak, Yu. A. Gornushkin, R. Edgecock, M. C. Sanchez, Np Longley, M. D. Messier, S. Hayden, Caleb Smith, E. Melnikov, S. Madani, P. N. Smith, B. Rebel, A. Soldatov, P. M. Border, V. Makeev, E. P. Hartouni, S. Eichblatt, Q.H. Hu, E. Buckley-Geer, N. Pearson, S. Chernichenko, K. Ruddick, Harvey B Newman, A. Sadovski, G. Alexeev, J. R. Meier, L. Mualem, A. L. Read, J. Kilmer, J. J. Grudzinski, Erik Katsavounidis, B.W. Sheng, L. Miller, T. H. Fields, R. LeBeau, C. James, R. K. Plunkett, William L. Barrett, Paul Schoessow, S. L. Mufson, A. Olshevski, Jie Liu, Marvin L Marshak, V.A. Onuchin, Ken Heller, R. H. Milburn, G. M. Irwin, M. J. Murtagh, G. J. Feldman, W. Smart, R. Hatcher, W. A. Mann, Gary Drake, D. M. DeMuth, B. C. Choudhary, E. A. Peterson, Thomas R. Chase, David Petyt, M. Ignatenko, W. P. Oliver, T. Alexopoulos, D. Attree, A. Sisakian, J. D. Cossairt, R. Morse, M. A. Barker, C. Rosenfeld, Hyun-Chul Kim, J. Schneps, S. M. S. Kasahara, Alexandre Lebedev, Peter D. Barnes, J. Guo, A. Byon-Wagner, J. Mofin, D. Krakauer, D. G. Michael, J. McDonald, T. Joffe-Minor, A. Cohee, Yu. Gilitsky, M. Gebhard, E. Avignone, A. Kulik, C. Andreopoulos, V. Paolone, C. R. Bower, J. W. Dawson, Yu. Gutnikov, J. A. Musser, C. W. Peck, R.A. Rameika, T. Kafka, H. Courant, Karol Lang, V. Gudkov, V. Smotriaev, B. Barsh, Carole C. Perry, J. Hanson, D. Pushka, Britt Anderson, A. DeSanto, Anna Pla-Dalmau, B. Baller, and R.M. Heinz

Subjects
Physics, Nuclear and High Energy Physics, Calorimeter (particle physics), business.industry, Physics::Instrumentation and Detectors, Detector, Photodetector, Physics::Optics, STRIPS, Scintillator, law.invention, Optics, Nuclear Energy and Engineering, MINOS, law, High Energy Physics::Experiment, Electrical and Electronic Engineering, Neutrino, business, Image resolution
Abstract

The MINOS detectors will use extruded plastic scintillator strips, which are readout by wavelength-shifting fibres coupled to multi-pixel photodetectors. This technique provides excellent energy and spatial resolution. The MINOS detectors are described in detail along with results from the light output tests.

Published
2002

32. The atmospheric neutrino flavor ratio from a 3.9 fiducial kiloton-year exposure of Soudan 2

Author

W.W.M. Allison, G.J. Alner, D.S. Ayres, G. Barr, W.L. Barrett, C. Bode, P.M. Border, C.B. Brooks, J.H. Cobb, R.J. Cotton, H. Courant, D.M. Demuth, T.H. Fields, H.R. Gallagher, C. Garcia-Garcia, M.C. Goodman, R. Gran, T. Joffe–Minor, T. Kafka, S.M.S. Kasahara, W. Leeson, P.J. Litchfield, N.P. Longley, W.A. Mann, M.L. Marshak, R.H. Milburn, W.H. Miller, L. Mualem, A. Napier, W.P. Oliver, G.F. Pearce, E.A. Peterson, D.A. Petyt, L.E. Price, K. Ruddick, M. Sanchez, J. Schneps, M.H. Schub, R. Seidlein, A. Stassinakis, J.L. Thron, V. Vassiliev, G. Villaume, S. Wakely, D. Wall, N. West, and U.M. Wielgosz

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Background subtraction, High Energy Physics::Experiment, Astrophysics::Earth and Planetary Astrophysics, Atmospheric neutrino, Neutrino, Fiducial marker, Flavor, High Energy Physics - Experiment
Abstract

We report a measurement of the atmospheric neutrino flavor ratio, R, using a sample of quasi-elastic neutrino interactions occurring in an iron medium. The flavor ratio (tracks/showers) of atmospheric neutrinos in a 3.9 fiducial kiloton-year exposure of Soudan 2 is 0.64 +- 0.11 (stat.) +- 0.06 (syst.) of that expected. Important aspects of our main analysis have been checked by carrying out two independent, alternative analyses; one is based upon automated scanning, the other uses a multivariate approach for background subtraction. Similar results are found by all three approaches., Comment: 15 pages, 4 figures. To be published in Physics Letters B

Published
1999

33. Direct production of high pT single photons in pp collisions at the CERN ISR

Author

D.C. Rahm, Aniello Nappi, R.B. Palmer, P. Mouzourakis, W. R. Molzon, Koji Nakamura, I. Mannelli, M. Diakonou, E.C. Fowler, C. Trakkas, D. Lissauer, A.M. Cnops, S. Iwata, I. Stumer, L. K. Resvanis, W. J. Willis, D.W. Hood, T. Fields, E. Fokitis, C.W. Fabjan, J.H. Cobb, T. A. Filippas, Christine Kourkoumelis, and P. Rehak

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Particle physics, Direct production, Photon, Large Hadron Collider, Physics::Instrumentation and Detectors, High Energy Physics::Experiment, Nuclear Experiment
Abstract

Single photon production in pp collisions at 30 < √s < 62 GeV has been measured with liquid-argon-lead calorimeters at the CERN ISR. This process remains approximately constant with increasing √s. For fixed √s, the single photon to π0 ratio increases strongly with increase in pT. The γπ0 ratio is about 0.2 for pT above 4.5 GeV/c.

Published
1979

34. Pre-triggered flash tubes for particle detection

Author

D.J. Miller, E. Rosso, and J.H. Cobb

Subjects
Flash (photography), Materials science, Optics, Physics::Instrumentation and Detectors, business.industry, Particle, Tube (fluid conveyance), Time resolution, General Medicine, Neutrino, Liquid nitrogen, business, Particle detector
Abstract

A new form of flash tube has been investigated as a particle detector, with special interest in its performance at liquid nitrogen temperature. The results indicate that the tubes count efficiently and with sufficiently good time resolution to be able to assist in resolving independent events in bubble-chamber neutrino pictures.

Published
1978

35. Transition radiators for electron identification at the CERN ISR

Author

A.J. Lankford, W. Struczinski, P. Rehak, A. Nappi, R. B. Palmer, J.H. Cobb, W. J. Willis, G. C. Moneti, S. Iwata, C.W. Fabjan, and C. Kourkoumelis

Subjects
Physics, Large Hadron Collider, Physics::Instrumentation and Detectors, Intersecting Storage Rings, Detector, chemistry.chemical_element, General Medicine, Electron, Charged particle, Nuclear physics, chemistry, Transition radiation, Radiator (engine cooling), Lithium, Nuclear Physics
Abstract

The authors describe transition radiators constructed from thin foils of lithium, used to separate electrons from heavier charged particles at the CERN Intersecting Storage Rings (ISR). The optimisation of the system of the radiator and detector is discussed, leading to the choice of parameters for this design. The special features of the construction of a structure of lithium is described. Results of a number of different measurements of the transition radiation are given. (11 refs).

Published
1977

36. The cross-section for J/ψ production in proton-proton collisions at centre-of-mass energies between 23 and 63 GeV

Author

I. Mannelli, N. Horwitz, C.W. Fabjan, Robert B. Palmer, W. Struczinski, Koji Nakamura, M. Goldberg, I. Stumer, C. Kourkoumelis, S. Iwata, J.H. Cobb, P. Rehak, G.C. Moneti, A.J. Lankford, D.C. Rahm, W. J. Willis, and Aniello Nappi

Subjects
Physics, Nuclear and High Energy Physics, Range (particle radiation), Large Hadron Collider, Proton, Physics::Instrumentation and Detectors, Intersecting Storage Rings, chemistry.chemical_element, Electron, Nuclear physics, Cross section (physics), chemistry, Mass spectrum, Physics::Accelerator Physics, High Energy Physics::Experiment, Lithium, Atomic physics, Nuclear Experiment, Particle Physics - Phenomenology
Abstract

The cross-section for J/ psi production in proton-proton collisions has been measured as a function of centre-of-mass energy at the CERN Intersecting Storage Rings by observing its decay into electron- positron pairs. This cross-section is found to rise by a factor of about six over the full centre-of-mass energy range from square root s =23 to square root s=63 GeV. Electrons resulting from this decay were identified by the use of liquid argon calorimeters and lithium foil transition radiators. Measurements of the energies of the electrons were obtained from the liquid argon calorimeters. (4 refs).

Published
1977

37. Relativistic Charged Particle Identification by Energy Loss

Author

J.H. Cobb and W.W.M. Allison

Subjects
Physics, Nuclear and High Energy Physics, Argon, chemistry.chemical_element, Charged particle, Particle detector, Particle identification, Relativistic particle, Nuclear physics, Identification (information), chemistry, Ionization, Physics::Atomic and Molecular Clusters, Measuring instrument, Atomic physics
Abstract

A detailed review, both theoretical and experimental, is given of the problems and progress involved in the identification of relativistic particles by ionization measurements in a medium. Argon is used as one example of such a medium. (AIP)

Published
1980

38. Azimuthal Correlations of High-Transverse-Momentumπ0Pairs

Author

Christine Kourkoumelis, R. Rehak, L. K. Resvanis, Robert B. Palmer, P. Mouzourakis, S. Iwata, W. Struckzinski, Koji Nakamura, C.W. Fabjan, I. Stumer, J.H. Cobb, I. Mannelli, N. Horwitz, D.C. Rahm, A.J. Lankford, Aniello Nappi, T. A. Filippas, W. J. Willis, M. Goldberg, G. C. Moneti, and E.C. Fowler

Subjects
Physics, Particle physics, Pair production, Annihilation, Pion, Meson, Intersecting Storage Rings, Hadron, General Physics and Astronomy, Elementary particle, Nuclear Experiment, Energy (signal processing)
Abstract

We have studied correlations between two ${\ensuremath{\pi}}^{0}'\mathrm{s}$ produced at the CERN intersecting storage rings, utilizing detectors with large azimuthal acceptance. We find that the previously observed enhancement of two ${\ensuremath{\pi}}^{0}'\mathrm{s}$ produced at azimuthal difference near 180\ifmmode^\circ\else\textdegree\fi{} can be made to vanish when certain kinematic effects are removed. However, we observe aligned configurations above 8 GeV of transverse energy unexplained by such kinematic effects.

Published
1978

39. The cross section for the production of massive electron pairs and the ϒ(9.5 GeV) in proton-proton collisions at the CERN ISR

Author

C. Kouroumelis, J.H. Cobb, I. Mannelli, N. Horwitz, C.W. Fabjan, I. Stumer, G.C. Moneti, D.C. Rahm, W. Struczinski, Aniello Nappi, E.C. Fowler, P. Rehak, Koji Nakamura, A.J. Lankford, M. Goldberg, P. Mouzourakis, W. J. Willis, S. Iwata, and Robert B. Palmer

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Particle physics, Electron pair, Large Hadron Collider, Astrophysics::High Energy Astrophysical Phenomena, High Energy Physics::Experiment, Astrophysics::Cosmology and Extragalactic Astrophysics, Nuclear Experiment, Astrophysics::Galaxy Astrophysics
Abstract

Measurements of the cross section for the production of electron pairs with invariant masses between 4 and 8.7 GeV are presented as a function of the centre-of-mass energy ( s = 28 to s = 62 GeV ) of the colliding proton beams. A significant excess of events is observed in the region 8.7 to 10.3 GeV; these are ascribed to the ϒ(9.5 GeV) resonances and estimates of the production cross sections are given.

Published
1977

40. Study of massive electron pair production at the CERN intersecting storage rings

Author

G.C. Moneti, W. Struczinski, W. J. Willis, S. Iwata, J.H. Cobb, R. Hogue, L. K. Resvanis, Christine Kourkoumelis, A.M. Cnops, I. Stumer, T. A. Filippas, D.C. Rahm, Aniello Nappi, D. Lissauer, C.W. Fabjan, Koji Nakamura, M. Goldberg, A.J. Lankford, P. Mouzourakis, E. Fokitis, I. Mannelli, Robert B. Palmer, N. Horwitz, P. Rehak, and T. Fields

Subjects
Physics, Nuclear and High Energy Physics, Electron pair, Range (particle radiation), Particle physics, Large Hadron Collider, Intersecting Storage Rings, Continuum (design consultancy), Astrophysics::Cosmology and Extragalactic Astrophysics, Helicity, Nuclear physics, Transverse momentum, High Energy Physics::Experiment, Astrophysics::Earth and Planetary Astrophysics, Nuclear Experiment, Scaling, Particle Physics - Experiment, Astrophysics::Galaxy Astrophysics
Abstract

Data from a study of electron pairs produced in pp collisions (√s = 5 and 63 GeV) are used to extend measurements of the scaling function down to m/√s ≈ 0.07 (4.5 < m < 19 GeV). The dilepton continuum can be described by the scaling formula (fx475-1) The average transverse momentum of dielectrons was found to be 1.43 ± 0.07 GeV, independent of mass (in the range 4.5 < m < 8.7 GeV) and rising with √s. The angular decay distribution of the pairs was measured in the s-channel helicity system and found to behave like 1 + α cos2θ, where α = 1.15 ± 0.34. The angular decay of ϒ at the same energies was found to have α = 0.31 ± 0.35.

Published
1980

41. Measurement of the nucleon structure function F2 in muon-iron interactions at 120,250 and 280 GeV

Author

J. M. Crespo, E. Schlösser, M. Villers, P.F. Dalpiaz, R.W. Dobinson, L. Massonnet, M. Leenen, G. Gössling, S.C. Brown, V. Korbel, Joshua Thompson, D. Williams, J. Drees, H. Pessard, J.H. Cobb, Richard Mount, J. McNicholas, F.W. Brasse, M. Schneegans, J. Favier, R. W. Clifft, Klaus Hamacher, E. Böhm, J. J. Aubert, J. Carr, U. Dosselli, Y. Declais, C. Broll, H.E. Montgomery, G. D'Agostini, H. E. Stier, Stephen Wimpenny, X. De Bouard, F. Combley, M. Maire, R. Gamet, J. Gayler, E. Gabathuler, H. Wahlen, W. Mohr, W.D. Dau, P. Gregory, J.K. Davies, K.H. Becks, G. Coignet, M.I. Ferrero, Ulrich Landgraf, M. Henckes, P. Payre, K. Rith, K. Moser, Uwe Pietrzyk, P.J. Hayman, V. Gerhardt, A. W. Edwards, C. Best, J.M. Thenard, P. R. Norton, M. C. Edwards, W. Stockhausen, Jennifer S. Haas, P. Dalpiaz, Cristiana Peroni, H. Minssieux, U. Hahn, W. Flauger, A.M. Osborne, T. J. Sloan, P. Ghez, J.G. Williamson, W.S.C. Williams, G. Bassompierre, M. Whalley, J.R. Holt, L. Urban, G.R. Court, and H. Jokisch

Subjects
Quantum chromodynamics, Physics, Nuclear and High Energy Physics, Particle physics, Muon, Hadron, Elementary particle, Deep inelastic scattering, Nuclear physics, Baryon, High Energy Physics::Experiment, Symmetry breaking, Nucleon, Particle Physics - Experiment
Abstract

A measurement of the nucleon structure function F2 on iron is presented. The data cover a kinematic range of 3.25 {slanted equal to or less-than} Q2 {slanted equal to or less-than} 200 GeV2and 0.05 {slanted equal to or less-than} x {slanted equal to or less-than} 0.65. The data clearly show scaling violation. Fits in leading-order QCD have been made and values for the scale breaking parameter λ are given. © 1981.

Published
1981

42. Measurement of in deep inelastic muon-proton scattering

Author

F. Combley, M. Maire, W.S.C. Williams, P. Payre, V. Korbel, M. Leenen, Joshua Thompson, M. Schneegans, G. D'Agostini, J. Favier, C. Best, D. Williams, Uwe Pietrzyk, P.F. Dalpiaz, M. C. Edwards, Klaus Hamacher, J.H. Cobb, J. Carr, A.M. Osborne, J.K. Davies, A. W. Edwards, T. J. Sloan, J.M. Thenard, M.I. Ferrero, Claus Goessling, H. Pessard, K. Moser, P. R. Norton, M. Whalley, V. Gerhardt, J. J. Aubert, H. E. Stier, P.J. Hayman, C. Broll, H.E. Montgomery, K. Rith, H. Wahlen, H. Jokisch, X. De Bouard, U. Dosselli, M. Henckes, Cristiana Peroni, E. Gabathuler, J.G. Williamson, J. McNicholas, J. Drees, J. Gayler, F.W. Brasse, G.R. Court, P. Gregory, Stephen Wimpenny, G. Bassompierre, P. Dalpiaz, G. Coignet, E. Boehm, L. Urban, S.C. Brown, J. M. Crespo, R. Gamet, L. Massonnet, H. Minssieux, R.W. Dobinson, W. Mohr, W. Flauger, K.H. Becks, Richard Mount, Y. Declais, W. Stockhausen, Jennifer S. Haas, W.D. Dau, R. W. Clifft, Ulrich Landgraf, and M. Villiers

Subjects
Nuclear physics, Quantum chromodynamics, Physics, Nuclear and High Energy Physics, X-ray Raman scattering, Muon, Scattering, Absorption cross section, High Energy Physics::Experiment, Scattering length, Inelastic scattering, Nuclear Experiment, Deep inelastic scattering
Abstract

The ratio R = σ L σ T of the longitudinal to the tranverse photon absorption cross section has been determined from deep inelastic muon-proton scattering at incident energies of 120, 200 and 280 GeV. The results are given as a function of the variables x , Q 2 and ν of the interaction. In the kinematic range 60 ⩽ ν ⩽ 160 GeV at 〈 Q 2 〉 = 22.5 GeV 2 an average value of R = 0.00 ± 0.10 has been obtained.

Published
1983

43. A Determination of the Fragmentation Functions of U-quarks Into Charged Pions

Author

M. Schneegans, J. Williamson, C. Best, H. E. Stier, D. Williams, M. I. Ferrero, P. Payre, H. Pessard, M. Whalley, J. Favier, E. Gabathuler, R. W. Clifft, F. Combley, M. Maire, H. Wahlen, H. Peschel, G.R. Court, J. Drees, J.H. Cobb, M. Villers, W. Mohr, A. W. Edwards, C. Goessling, G. Bassompierre, J.M. Thenard, W.D. Dau, B. Korzen, W. Stockhausen, P. R. Norton, M. Henckes, Adam C. Schneider, Y. Declais, R. Gamet, W.S.C. Williams, Stephen Wimpenny, K. Ham Acher, M. Edwards, E. Nagy, U. Dosselli, T. J. Sloan, K.H. Becks, J. Nassalski, L. Urban, H. Forsbach, S.C. Brown, W. Flauger, C. Benchouk, G. D'Agostini, G. Coignet, K. Moser, A.M. Osborne, J. J. Aubert, U. Pietrzyk, C. Broll, C. Peroni, H.E. Montgomery, X. De Bouard, K. Rith, J. Gayler, V. Korbel, J. Haas, J. Carr, J.K. Davies, J. McNicholas, V. Gerhardt, Ulrich Landgraf, E. Boehm, F.W. Brasse, J. C. Thompson, R.P. Mount, P.J. Hayman, M. Leenen, BOMBAR, Claudine, Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), and EMC

Subjects
Quark, Physics, Nuclear and High Energy Physics, Particle physics, [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], 010308 nuclear & particles physics, Scattering, High Energy Physics::Lattice, High Energy Physics::Phenomenology, Nuclear Theory, Parton, 01 natural sciences, Nuclear physics, Pion, Distribution function, Fragmentation (mass spectrometry), 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics::Experiment, 010306 general physics, Nuclear Experiment, Particle Physics - Experiment
Abstract

The fragmentation functions of u-quarks into positive and negative pions are determined from an analysis of identified pions produced in deep inelastic muon-deuterium scattering. The method adopted is not sensitive to the knowledge of the primary quark distribution functions. The fragmentation of u quarks to positive pions is found to fall less steeply in z than that to negative pions as expected in the quark parton model. © 1985.

Published
1985

44. Study of resolved high-p$_{T}$ neutral pions at the CERN ISR

Author

T. A. Filippas, D.C. Rahm, C.W. Fabjan, E. Fokitis, Robert B. Palmer, A.M. Cnops, Christine Kourkoumelis, S. Iwata, I. Mannelli, G. Voulgaris, S.D. Smith, I. Stumer, W. J. Willis, A.J. Lankford, Aniello Nappi, T. Fields, P. Mouzourakis, Koji Nakamura, M. Goldberg, D. Lissauer, J.H. Cobb, L. K. Resvanis, and P. Rehak

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Particle physics, Photon, Pion, Large Hadron Collider, Signal, Particle Physics - Experiment
Abstract

The inclusive production of pi /sup 0/ at large values of p/sub T/ in the pp collisions at the ISR has been studied. In this experiment the two photons are resolved and separately measured for p/sub T/ values of up to 6 GeV/c, giving confidence that the desired signal has been separated from various backgrounds. (4 refs).

Published
1979

45. $\rho^{0}$ production in deep inelastic $\mu$ -p interactions

Author

H. Wahlen, Claus Goessling, M. Leenen, Joshua Thompson, M. Schneegans, G. D'Agostini, C. Broll, H.E. Montgomery, F. Combley, M. Maire, V. Korbel, C. Best, J. Gayler, J.G. Williamson, M. C. Edwards, J. Favier, J. Carr, E. Nagy, D. Williams, M. Villers, W. Mohr, G. Bassompierre, J.H. Cobb, Klaus Hamacher, C. Benchouk, L. Urban, J. Mcnicolas, F.W. Brasse, U. Dosselli, P. Payre, Richard Mount, K. Moser, J. Nassalski, E. Boehm, Y. Declais, W. Flauger, A.M. Osborne, T. J. Sloan, G. Coignet, Ulrich Landgraf, M. Henckes, H. Minssieux, W.D. Dau, H. Pessard, H. E. Stier, R. Gamet, J.K. Davies, M.I. Ferrero, W. Stockhausen, J. J. Aubert, P.J. Hayman, X. De Bouard, E. Gabathuler, H. Forsbach, S.C. Brown, V. Gerhardt, J. Drees, Jennifer S. Haas, Uwe Pietrzyk, K.H. Becks, R. W. Clifft, Adam C. Schneider, Cristiana Peroni, A. W. Edwards, J.M. Thenard, P. R. Norton, K. Rith, Stephen Wimpenny, W.S.C. Williams, M. Whalley, G.R. Court, BOMBAR, Claudine, Laboratoire d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and EMC

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Muon, Meson, [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], 010308 nuclear & particles physics, Branching fraction, Hadron, Inelastic scattering, Deep inelastic scattering, 01 natural sciences, Nuclear physics, Pion, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics::Experiment, Nuclear Experiment, 010306 general physics, Particle Physics - Experiment, Lepton
Abstract

Inclusive ϱ 0 meson production has been measured in 120 GeV and 280 GeV muon-proton interactions. Distributions of z and p T 2 are presented. Primary ϱ 0 production is found to be equal to that of π 0 production within errors.

Published
1983

46. The measurement of bethe-heitler bremsstrahlung in muon-hydrogen interactions at 200 gev

Author

D. Williams, Uwe Pietrzyk, Joshua Thompson, U. Dosselli, A. W. Edwards, J.M. Thenard, K. Moser, M. Schneegans, M. Whalley, P. R. Norton, F. Combley, M. Maire, H. Wahlen, G. D'Agostini, J. McNicholas, J.K. Davies, G.R. Court, M. Villers, A.M. Osborne, J. Favier, M.I. Ferrero, T. J. Sloan, Claus Goessling, H. Pessard, G. Coignet, J. J. Aubert, C. Broll, H.E. Montgomery, P.J. Hayman, Klaus Hamacher, X. De Bouard, H. Forsbach, V. Gerhardt, J. Gayler, H. E. Stier, S.C. Brown, V. Korbel, E. Gabathuler, F.W. Brasse, W.D. Dau, W. Flauger, W.S.C. Williams, Cristiana Peroni, C. Benchouk, J. Carr, S. J. Wimpenny, E. Nagy, J. Williamson, R. Gamet, M. C. Edwards, K.H. Becks, L. Urban, H. Minssieux, Ulrich Landgraf, R. W. Clifft, C. Best, J.H. Cobb, J. Nassalski, P. Payre, W. Stockhausen, M. Henckes, E. Boehm, Richard Mount, Jennifer S. Haas, K. Rith, Y. Declais, W. Mohr, G. Bassompierre, J. Dress, P. Gregory, M. Leenen, Laboratoire d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), EMC, and BOMBAR, Claudine

Subjects
Physics, Particle physics, Muon, Photon, [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], Physics and Astronomy (miscellaneous), Spectrometer, Physics::Instrumentation and Detectors, 010308 nuclear & particles physics, Detector, Bremsstrahlung, Emission theory, 01 natural sciences, Nuclear physics, Lead glass, visual_art, 0103 physical sciences, visual_art.visual_art_medium, Radiative transfer, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Nuclear Experiment, 010306 general physics, Engineering (miscellaneous), Particle Physics - Experiment
Abstract

Using a lead glass detector installed in the EMC forward spectrometer radiative photons have been measured in 200 GeV muon-hydrogen collisions. The results are compared with the standard QED one photon emission theory of Mo and Tsai and also with the more recent predictions of a multiphoton emission theory of Chahine. We conclude that there is no evidence for any deviation from the standard theory, in terms of the yield and angular distribution of photons with fractional energy,z>0.7.

Published
1984

47. A LARGE MAGNETIC SPECTROMETER SYSTEM FOR HIGH-ENERGY MUON PHYSICS

Author

Richard Mount, J. Favier, D. R. Botterill, Klaus Hamacher, Y. Declais, A.M. Osborne, T. J. Sloan, J. J. Aubert, C. Broll, H.E. Montgomery, W.S.C. Williams, Joshua Thompson, P. Payre, M. Henckes, J. Drees, Y. Bertsch, H. Pessard, J. Gayler, U. Hahn, E. Gabathuler, M. Schneegans, G. Bassompierre, R.W. Dobinson, P. Dalpiaz, R. Gamet, G. Gössling, E. J. Watson, E. Schlösser, K.H. Becks, P.F. Dalpiaz, O. C. Allkofer, P.J. Hayman, B. Charles, M. Moynot, H. E. Stier, J. M. Crespo, K. Rith, Stephen Wimpenny, C. Best, Cristiana Peroni, M. D. Rousseau, A. Melissinos, L. Massonnet, F.W. Brasse, G. Coignet, W.D. Dau, L. Urban, W. Mohr, P. Ghez, Uwe Pietrzyk, F. Combley, M. Maire, C. Besson, M. Sproston, E. Böhm, A. W. Edwards, V. Korbel, J. Kadyk, J.M. Thenard, V.A. White, W. Stockhausen, P. R. Norton, W. Flauger, J. Carr, G. von Holtey, M. Vivargent, Jennifer S. Haas, H. Jokisch, J.K. Davies, R. W. Clifft, M. C. Edwards, M.I. Ferrero, K. Moser, H. Wahlen, J. H. Field, D. Williams, and J.H. Cobb

Subjects
Physics, Particle physics, Muon, Large Hadron Collider, Spectrometer, Physics::Instrumentation and Detectors, General Medicine, Inelastic scattering, Deep inelastic scattering, European Muon Collaboration, Nuclear physics, Muon collider, Physics::Accelerator Physics, High Energy Physics::Experiment, Detectors and Experimental Techniques, Nuclear Experiment, Lepton
Abstract

The European Muon Collaboration has built a large magnetic spectrometer system for deep inelastic muon scattering experiments at the CERN SPS muon beam. The general characteristics of the apparatus — composed of a target of either liquid hydrogen or deuterium, or iron plus scintillator, followed by a large magnet with wire chambers before and after it for precise angle and momentum measurement, a muon identifier, large trigger hodoscopes, and hadron identifiers — are explained and each part is described in some detail. The main features of the data-acquisition and apparatus-monitoring systems and of the off-line event reconstruction are given.

Published
1981

48. A Detailed Study of the Proton Structure Functions In Deep Inelastic Muon-proton Scattering

Author

F. Combley, M. Maire, M. Leenen, U. Pietrzyk, M. Schneegans, P.J. Hayman, J. J. Aubert, W. Stockhausen, P. Payre, C. Broll, H.E. Montgomery, X. De Bouard, Jennifer S. Haas, J. Nassalski, R.W. Dobinson, J.H. Cobb, J. Gayler, E. Böhm, Ulrich Landgraf, Claus Gössling, V. Korbel, L. Urban, F.W. Brasse, J. Favier, W.D. Dau, J. Carr, K.H. Becks, C. Best, K. Moser, R. Gamet, J. C. Thompson, Richard Mount, K. Rith, W. Mohr, H. E. Stier, Stephen Wimpenny, Y. Declais, J.G. Williamson, E. Gabathuler, S.C. Brown, J. Drees, W. Flauger, G. Bassompierre, H. Wahlen, M. Henckes, A. W. Edwards, J.M. Thenard, J. McNicholas, P. R. Norton, R. W. Clifft, H. Pessard, J.K. Davies, Klaus Hamacher, M.I. Ferrero, V. Gerhardt, Cristiana Peroni, W.S.C. Williams, M. Edwards, M. Whalley, A.M. Osborne, T. J. Sloan, U. Dosselli, G. D'Agostini, G. Coignet, Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), EMC, and BOMBAR, Claudine

Subjects
Quantum chromodynamics, Physics, Nuclear and High Energy Physics, Muon, Photon, [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], Proton, 010308 nuclear & particles physics, Scattering, 01 natural sciences, Gluon, Nuclear physics, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics::Experiment, Twist, Nuclear Experiment, 010306 general physics, Nucleon, Particle Physics - Experiment
Abstract

The x and Q 2 dependence of the single photon exchange cross section d 2 σ /d Q 2 d x and the proton structure functions F 2 ( x , Q 2 ) and R ( x , Q 2 ) have been measured in deep inelastic muon proton scattering in the region 0.02 x Q 2 2 . By comparing data at different incident muon energies R was found to have little kinematic dependence and an average value of −0.010 ± 0.037 (stat.) ± 0.102 (stat.). The observed deviations from scaling gave the value of Λ MS , the QCD mass scale parameter, to be 105 −45 +55 (stat.) −45 +85 (syst.) MeV. The fraction of the momentum of the nucleon carried by gluons was found to be ∼56% at Q 2 ∼22.5 GeV 2 . It is shown that to obtain a description of the data for F 2 ( x , Q 2 ) together with that measured in deep inelastic electron-proton scattering at lower Q 2 it is necessary to include additional higher twist contributions. The value of Λ MS remains unchanged with the inclusion of these contributions which were found to have an x -dependence of the form x 3 /(1 − x ).

Published
1985

49. Characteristics of J/psi and UPSILON production at the CERN Intersecting Storage Rings

Author

I. Stumer, Koji Nakamura, M. Goldberg, J.H. Cobb, W. J. Willis, W. Struczinski, D. Lissauer, L. K. Resvanis, G.C. Moneti, Aniello Nappi, C.W. Fabjan, R. Hogue, P. Mouzourakis, S. Iwata, T. Fields, I. Mannelli, N. Horwitz, P. Rehak, Christine Kourkoumelis, D.C. Rahm, T. A. Filippas, A.M. Cnops, A.J. Lankford, Robert B. Palmer, and E. Fokitis

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Large Hadron Collider, Intersecting Storage Rings, High Energy Physics::Phenomenology, Hadron, Continuum (design consultancy), Function (mathematics), Nuclear physics, Bound state, High Energy Physics::Experiment, Production (computer science), Nuclear Experiment, Scaling, Particle Physics - Experiment
Abstract

We present the B( d θ d y ) y=0 for J /ψ over thefull range of ISR energies and for ϒ at √s = 53 and 63 GeV, using their dielectron decay mode. The average transverse momentum and the decay angles are presented. We found (pT) = 1.75 ± 0.19 GeV for ϒ, being higher than (pT) of the continuum and rising with √s. We present a comparison of the cross sections of J/ψ and ϒ with those of the continuum, at the same masses, as a function of √s. An appropriate scaling of the hadronic production of quark-antiquark narrow bound states involving ⋉, J/ψ, ψ′, ϒ, and ϒ′ is presented as a function of m/√s at y = 0, and is compared with Drell-Yan scaling.

Published
1980

50. A comparison of the energy distributions of hadrons produced in deep inelastic scattering of muons on hydrogen and deuterium targets

Author

M. Henckes, A.M. Osborne, M. Villers, U. Pietrzyk, R. W. Clifft, M. Edwards, K. Rith, J.K. Davies, Klaus Hamacher, M.I. Ferrero, N. Pavel, V. Gerhardt, Richard Mount, T. J. Sloan, J. Favier, P. Payre, Claus Gössling, W.S.C. Williams, E. Nagy, Y. Declais, H. E. Stier, H. Peschel, A. W. Edwards, J.M. Thenard, E. Böhm, J. Nassalski, J. Haas, P. R. Norton, W. Mohr, F.W. Brasse, C. Best, J. C. Thompson, Adam C. Schneider, D. Williams, W. Stockhausen, M. Leenen, J.H. Cobb, Ulrich Landgraf, W. Flauger, V. Korbel, M. Schneegans, J. Carr, C. Benchouk, G. Eszes, C. Broll, H.E. Montgomery, J. Gayler, J. J. Aubert, F. Combley, M. Maire, U. Dosselli, X. De Bouard, R. Gamet, Stephen Wimpenny, H. Pessard, G. D'Agostini, G. Coignet, M. Whalley, J. McNicholas, J.G. Williamson, G.R. Court, E. Gabathuler, W.D. Dau, Cristiana Peroni, P. Ribarics, K. Moser, P.J. Hayman, J. Drees, G. Bassompierre, L. Urban, H. Forsbach, S.C. Brown, H. Wahlen, B. Korzen, K.H. Becks, Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), EMC, and BOMBAR, Claudine

Subjects
Physics, Quark, Particle physics, Muon, [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], Physics and Astronomy (miscellaneous), 010308 nuclear & particles physics, High Energy Physics::Phenomenology, Parton, Inelastic scattering, Jet (particle physics), Deep inelastic scattering, 01 natural sciences, 7. Clean energy, Nuclear physics, Deuterium, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics::Experiment, Neutron, Nuclear Experiment, 010303 astronomy & astrophysics, Engineering (miscellaneous), Particle Physics - Experiment
Abstract

The energy distribution of inclusive hadrons produced by 280 GeV muons on hydrogen and deuterium targets are compared. The sum of the scaled energy distributions of the positive and negative hadrons is found to be the same for the two targets. The difference of these distributions is observed to factorise inx andz and thez-dependence is found to be independent of the target type and have a form (1−z)2.1±0.2. The net charge of the hadronic jet is positive at highx even in the case when the scattering takes place on the neutron. These results are in good agreement with the expectations of the Quark Parton Model.

Published
1986

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