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11 results on '"W. Brodowski"'

1. Two-pion production in proton–proton collisions near threshold

Author

W. Oelert, J. Greiff, W. Brodowski, P. Marciniewski, B. Morosov, H. Clement, R. Bilger, S. Kullander, T. Sefzick, J. Johanson, Hans Calén, J. Stepaniak, A. Sukhanov, I. Koch, A. Khoukaz, Roger Ruber, Curt Ekstrom, Kjell Fransson, Arne Johansson, L. Gustafsson, S. Häggström, Bo Höistad, Tord Johansson, J. Zabierowski, J. Zlomanczuk, Andrzej Kupsc, W. Scobel, G.J. Wagner, B.A. Shwartz, and A. Povtorejko

Subjects
Nuclear reaction, Physics, Nuclear and High Energy Physics, Proton, Nuclear Theory, Detector, Nuclear physics, Near threshold, Pion, Cluster (physics), High Energy Physics::Experiment, Atomic physics, Nuclear Experiment, Storage ring
Abstract

Two-pion production reactions in proton-proton collisions have been studied using the PROMICE/WASA detector and an internal cluster gas-jet target at the CELSIUS storage ring in Uppsala. Three out ...

Published
2002
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2. Spectator tagging in quasi-free proton–neutron interactions in deuterium using an internal cluster-jet target at a storage ring

Author

W. Brodowski, K. Kilian, P. Sundberg, G. J. Wagner, Andrzej Kupsc, V. B. Dunin, T. Johansson, B. Morosov, J. Dyring, A. Sukhanov, A. Turowiecki, C. Ekström, T. Neubauer, B. Shwartz, J. Stepaniak, Hans Calén, J Greiff, Pawel Marciniewski, Kjell Fransson, Jozef Zlomanczuk, Z. Wilhelmi, J. Zabierowski, Roger Ruber, I. Koch, S. Kullander, Leif Gustafsson, J. Johanson, W. Oelert, R. Bilger, H. Clement, Arne Johansson, Colin Wilkin, and Bo Höistad

Subjects
Physics, Nuclear and High Energy Physics, Jet (fluid), Proton, Scattering, Nuclear Theory, Resolution (electron density), The Svedberg Laboratory, Nuclear physics, Deuterium, Neutron, Atomic physics, Nuclear Experiment, Instrumentation, Storage ring
Abstract

Low-energy spectator protons (p s ) from quasi-free proton–neutron interactions on deuterium have been measured for the pd→dπ 0 p s and pd→pnπ 0 p s reactions at the CELSIUS storage ring of the The Svedberg Laboratory. The experiment used 320 MeV protons incident on a deuterium cluster-jet target. The spectator protons were detected inside the scattering chamber using a silicon detector system which is compatible with a high vacuum. The low target density allows the spectator proton emerge without undergoing significant secondary scattering. Its measurement is therefore a useful tag upon such reactions, allowing cross-sections for quasi-free reactions to be deduced at well-defined centre-of-mass energies. The comparison with the simulation for the pd→dπ 0 p s reaction shows that the energy dependence of the pn→dπ 0 cross-section can be extracted near the threshold. The method greatly improves the experimental resolution achievable in quasi-free p–n reaction studies.

Published
2001
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3. Differential cross sections of the pp → ppπ0 reaction from 310 to 425 MeV

Author

G. J. Wagner, Z. Wilhelmi, J. Zabierowski, H. Clement, J. Johanson, C. Ekström, W. Brodowski, Jozef Zlomanczuk, J. Dyring, A. Sukhanov, U. Schuberth, Andrzej Kupsc, B. Morosov, Pawel Marciniewski, A. Turowiecki, Hans Calén, Kjell Fransson, Leif Gustafsson, B. Shwartz, J. Stepaniak, S. Kullander, S. Häggström, A. Mörtsell, R. Bilger, T. Johansson, W. Oelert, Roger Ruber, K. Kilian, P. Sundberg, Bo Höistad, A. Zernov, Arne Johansson, Colin Wilkin, and Göran Fäldt

Subjects
Nuclear reaction, Physics, Nuclear physics, Nuclear and High Energy Physics, Degree Celsius, Storage ring, Differential (mathematics)
Abstract

Measurements of the differential cross sections of the pp --> pp pi(0) reaction at 310, 320, 340, 360, 400 and 425 MeV have been carried out at the CELSIUS storage ring in Uppsala. An attempt ha ...

Published
2000
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4. Upper limits for a narrow dibaryon in pp collisions at 200 and 310 MeV

Author

J. Dyring, A. Sukhanov, U. Schuberth, C. Ekström, A. Kupść, A. Turowiecki, H. Clement, S. Häggström, T. Johansson, B. Morosov, B. Shwartz, J. Stepaniak, S. Kullander, Hans Calén, J. Zabierowski, W. Oelert, R. Bilger, K. Kilian, Kjell Fransson, Jozef Zlomanczuk, A. Mörtsell, A. Zernov, G. J. Wagner, Pawel Marciniewski, Z. Wilhelmi, Arne Johansson, Bo Höistad, W. Brodowski, Leif Gustafsson, and Roger Ruber

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Particle physics, Bremsstrahlung, Quantum number, Storage ring
Abstract

Dibaryons, forbidden by mass to decay into NN π channel and by quantum numbers into NN channel, may still have escaped detection. In fact, recently an observation of a narrow dibaryon (D) with the mass close to 1920 MeV was reported in the process pp → γγ + X . This dibaryon should also appear in the proton-proton bremsstrahlung data from measurements at 200 and 310 MeV, which have been carried out at the CELSIUS storage ring in Uppsala. From these data upper limits of 10 and 3 nb are obtained for the dibaryon production cross section (at 95% confidence level) for the two energies, respectively.

Published
1998
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5. Threshold Structure of the Quasifreep+n→d+ηReaction

Author

H. Calén, J. Dyring, K. Fransson, L. Gustafsson, S. Häggström, B. Höistad, J. Johanson, A. Johansson, T. Johansson, A. Khoukaz, S. Kullander, R. J. M. Y. Ruber, J. Złomańczuk, B. Morosov, A. Povtorejko, A. Sukhanov, A. Zernov, A. Kupść, P. Marciniewski, J. Stepaniak, R. Bilger, W. Brodowski, H. Clement, G. J. Wagner, C. Ekström, J. Zabierowski, A. Bondar, A. Kuzmin, B. Shwartz, V. Sidorov, A. Turowiecki, Z. Wilhelmi, K. Kilian, W. Oelert, T. Sefzick, V. Sopov, and V. Tchernychev

Subjects
Physics, Cross section (physics), Deuterium, Proton, Nuclear Theory, Physics::Accelerator Physics, General Physics and Astronomy, Atomic physics, Nuclear Experiment, Storage ring
Abstract

The quasifree p + n --> d + eta reaction cross section has been measured at the threshold using 1295 MeV protons in the CELSIUS storage ring and an internal cluster-jet deuterium target. The kinematics is chosen such that the target proton can be assumed

Published
1998
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6. CELSIUS as an η factory

Author

A. Martemyanov, G. J. Wagner, V. Tikhomirov, Hans Calén, M. Gornov, H. Clement, J. Moehn, B. Morosov, Kjell Fransson, Akira Yamamoto, A. Nawrot, W. Oelert, G. M. Kolachev, R. Bilger, J. Zabierowski, A.E. Bondar, A. Turowiecki, Roger Ruber, S. Dahlgren, W. Brodowski, B. Shwartz, J. Stepaniak, Pawel Marciniewski, Yu. B. Gurov, S. Sandukovsky, A. Zernov, V. Tchernyshev, Z. Pawlowski, A. A. Kuznetsov, Leif Gustafsson, Andrzej Kupsc, D. Reistad, A. Povtorejko, T. Johansson, Y. Yuasa, K. Kilian, M. Komogorov, Bo Höistad, L. Komogorova, V.A. Sidorov, T. Purlatz, R. Shafigullin, V. B. Dunin, Hiromi Hirabayashi, I. Chuvilo, A. Jansson, M. Blom, Z. Wilhelmi, B. Chernyshev, V. Sopov, S. Häggström, C.-J. Fridén, S. Kullander, A.I. Sukhanov, H. Ikegami, Jozef Zlomanczuk, Y. Mizuno, A. Kuzmin, D. Bogoslawsky, Arne Johansson, A. Yamaoka, and C. Ekström

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Particle physics, Meson, Degree Celsius, Factory (object-oriented programming), High Energy Physics::Experiment, Nuclear Experiment, Ring (chemistry), Physics::Atmospheric and Oceanic Physics, Storage ring
Abstract

The WASA project at the CELSIUS storage ring is being prepared for high-luminosity experiments to study rare decays of light mesons, in particular the η meson. The CELSIUS ring together with the newly developed pellet target will serve as an efficient η factory.

Published
1997
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7. Detector setup for a storage ring with an internal target

Author

H. Calén, S. Carius, K. Fransson, L. Gustafsson, S. Häggström, B. Höistad, A. Johansson, T. Johansson, S. Kullander, A. Mörtsell, J. Möhn, R. Ruber, U. Schuberth, J. Złomańczuk, C. Ekström, C.-J. Fridén, D. Reistad, K. Kilian, W. Oelert, V. Renken, T. Sefzick, M. Waters, A. Bondar, G. Kolachev, A. Kuzmin, T. Purlatz, B. Shwartz, V. Sidorov, A. Sukhanov, A. Kupść, P. Marciniewski, A. Nawrot, J. Stepaniak, D. Bogoslawsky, V. Dunin, A. Kuznetsov, B. Morosov, A. Povtorejko, S. Sandukovsky, A. Zernov, J. Zabierowski, A. Turowiecki, Z. Wilhelmi, Z. Pawlowski, R. Bilger, W. Brodowski, H. Clement, G. Kurz, G.J. Wagner, A. Martemyanov, V. Sopov, V. Tchernyshev, E. David, M. Price, and C. Rivoiron

Subjects
Physics, Nuclear and High Energy Physics, Range (particle radiation), Photon, Physics::Instrumentation and Detectors, Nuclear Theory, Detector, Scintillator, Particle detector, Charged particle, Scintillation counter, Atomic physics, Nuclear Experiment, Instrumentation, Storage ring
Abstract

A detector setup for the cooler storage ring CELSIUS is described. The setup detects particles produced in interactions between the internal beam and a cluster-jet target. Particles emitted in the forward direction are measured by means of arrays of plastic scintillators and proportional counters. Particles, particularly photons, emitted more isotropically are measured by means of two calorimeters containing CsI(Na) crystals. The performance of the setup is given for neutral meson production in proton-proton and proton-deuteron interactions in the energy range 290–1360 MeV.

Published
1996
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8. The WASA Detector Facility at CELSIUS

Author

Chr. Bargholtz, M. Bashkanov, M. Berłowski, A. Bondar, D. Bogoslawsky, W. Brodowski, J. Brudvik, H. Calén, F. Capellaro, A. Chilingarov, H. Clement, J. Comfort, L. Demirörs, C. Ekström, K. Fransson, C.-J. Fridén, L. Gerén, M. Gornov, V. Grebenev, J. Greiff, Y. Gurov, L. Gustafsson, B. Höistad, G. Ivanov, M. Jacewicz, E. Jiganov, A. Johansson, T. Johansson, S. Keleta, O. Khakimova, A. Khoukaz, K. Kilian, N. Kimura, I. Koch, G. Kolachev, F. Kren, S. Kullander, A. Kupść, A. Kuzmin, A. Kuznetsov, K. Lindberg, P. Marciniewski, R. Meier, O. Messner, B. Morosov, A. Nawrot, B.M.K. Nefkens, G. Norman, W. Oelert, C. Pauly, H. Pettersson, A. Pivovarov, J. Pätzold, Y. Petukhov, A. Povtorejko, D. Reistad, R.J.M.Y. Ruber, S. Sandukovsky, K. Schönning, W. Scobel, T. Sefzick, R. Shafigullin, B. Shwartz, V. Sidorov, T. Skorodko, V. Sopov, A. Starostin, J. Stepaniak, A. Sukhanov, V. Tchernyshev, P.-E. Tegnér, P. Thörngren Engblom, V. Tikhomirov, H. Toki, A. Turowiecki, G.J. Wagner, U. Wiedner, Z. Wilhelmi, M. Wolke, A. Yamamoto, H. Yamaoka, J. Zabierowski, I. Zartova, and J. Złomańczuk

Subjects
Nuclear and High Energy Physics, Particle physics, Meson production, Meson, data acquisition, electromagnetic [calorimeter], Nuclear Theory, decay modes [eta], pellet target, FOS: Physical sciences, scintillators, multidetector system, Particle detector, Nuclear physics, Degree Celsius, calorimeter, ddc:530, hadroproduction [meson], Nuclear Experiment (nucl-ex), Nuclear Experiment, Instrumentation, scintillation counter, forward spectrometer, Physics, Eta meson, Detector, trigger, scattering [ion], Uppsala CELSIUS Stor, mini drift chambers, performance [four-pi-detector], drift chamber, target [hydrogen], solenoid [superconductivity], High Energy Physics::Experiment, Storage ring
Abstract

The WASA 4pi multidetector system, aimed at investigating light meson production in light ion collisions and eta meson rare decays at the CELSIUS storage ring in Uppsala is presented. A detailed description of the design, together with the anticipated and achieved performance parameters are given., 25 pages, 20 figures

Published
2008
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9. Some features of the pd→ppnπ[sup 0] reaction at 1.037 GeV

Author

H. Clement, J. Greiff, Curt Ekstrom, R. J. M. Y. Ruber, Marek Jacewicz, A. Kupść, W. Brodowski, K. Fransson, B. Höistad, L. Gustafsson, B. Morosov, Z. Wilhelmi, B. Shwartz, J. Stepaniak, A. Turowiecki, R. Bilger, Arne Johansson, S. Kullander, Hans Calén, J. Zabierowski, T. Johansson, I. Koch, and J. Zlomanczuk

Subjects
Nuclear physics, Physics, Roper resonance, Position (vector), Nuclear Theory, Invariant mass, Nuclear Experiment, Excitation, Storage ring, Delta baryon
Abstract

Preliminary results of the measurement of pd→ppnγγ reaction at around 1 GeV are presented. The reaction was measured at the CELSIUS storage ring using the WASA/PROMICE set-up. The quasi free mechanism was found to be dominant with Δ(1232) excitation in the proton-pion system. The signal at the position of Roper resonance was observed in the proton-π0 invariant mass. A class of “non-spectator” events was observed with small proton-proton invariant mass.

Published
2001
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10. Meson Production Near Threshold

Author

Tord Johansson, H. Calén, J. Dyring, K. Fransson, L. Gustafsson, S. Häggström, B. Höistad, J. Johanson, A. Johansson, S. Kullander, R. J. M. Y. Ruber, J. Zlomanczuk, C. Ekström, K. Kilian, W. Oelert, T. Sefsick, R. Bilger, W. Brodowski, H. Clement, G. J. Wagner, A. Bondar, B. Shwartz, V. Sidorov, A. Sukhanov, A. Kupsc, P. Marciniewski, J. Stepaniak, J. Zabierowski, V. Dunin, B. Morosov, A. Povtorejko, A. Zernov, A. Turowiecki, Z. Wilhelmi, V. Sopov, and T. Tchernychev

Subjects
Physics, Excitation function, Scattering cross-section, Nuclear physics, Near threshold, Meson production, Phase space, The Svedberg Laboratory, Storage ring, Ion
Abstract

One of the main topics in the experimental programme at the CELSIUS cooler/storage ring of the The Svedberg Laboratory, Uppsala is meson production in light ion collisions near threshold. The PROMICE/WASA collaboration is studying π0 and 2π production in pp collisions and ŋ production in pN collisions. Some of the reaction channels have been measured for the first time in any detail. The experimental method is reviewed and some results are presented, together with an outlook.

Published
2000
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11. Meson production in light ion collisions at CELSIUS

Author

T. Johansson, R. Bilger, W. Brodowski, A. Bondar, H. Calén, H. Clement, V. Dunin, J. Dyring, C. Ekström, K. Fransson, L. Gustafsson, S. Häggström, B. Höistad, A. Johansson, K. Kilian, S. Kullander, A. Kupsc, A. Kuzmin, P. Marciniewski, B. Morosov, A. Möstsell, W. Oelert, A. Povtorejko, V. Renken, R. Ruber, U. Schuberth, T. Sefzick, B. Shwartz, V. Sidorov, A. Sukhanov, J. Stepaniak, G.J. Wagner, Z. Wilhelmi, J. Zabierowski, A. Zernov, and J. Zlomanczuk

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Particle physics, Meson production, Degree Celsius, Dalitz plot, Storage ring, The Svedberg Laboratory, Particle Physics - Experiment, Ion
Abstract

The PROMICE and WASA collaborations are engaged in a common programme in studies of pp and pd reactions at the CELSIUS storage ring at the The Svedberg Laboratory, Uppsala. Emphasis is placed on measurements of neutral meson production in the threshold region. The experimental set-up is presented together with a review of results obtained.

Published
1996

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