Search

Your search keyword '"A. Kosche"' showing total 25 results
Start Over Author "A. Kosche" Topic computer.programming_language
25 results on '"A. Kosche"'

1. A search for the electric dipole moment of the τ-lepton

Author

H. Albrecht, T. Hamacher, R.P. Hofmann, T. Kirchhoff, R. Mankel, A. Nau, S. Nowak, D. Reßing, H. Schröder, H.D. Schulz, M. Walter, R. Wurth, C. Hast, H. Kapitza, H. Kolanoski, A. Kosche, A. Lange, A. Lindner, M. Schieber, T. Siegmund, H. Thurn, D. Töpfer, D. Wegener, C. Frankl, J. Graf, M. Schmidtler, M. Schramm, K.R. Schubert, R. Schwierz, B. Spaan, R. Waldi, K. Reim, H. Wegener, R. Eckmann, H. Kuipers, O. Mai, R. Mundt, T. Oest, R. Reiner, A. Rohde, W. Schmidt-Parzefall, J. Stiewe, S. Werner, K. Ehret, W. Hofmann, A. Hüpper, K.T. Knöpfle, J. Spengler, P. Krieger, D.B. MacFarlane, J.D. Prentice, P.R.B. Saull, K. Tzamariudaki, R.G. Van de Water, T.-S. Yoon, M. Schneider, S. Weseler, M. Bračko, G. Kernel, P. Križan, E. Križnič, G. Medin, T. Podobnik, T. Živko, V. Balagura, S. Barsuk, I. Belyaev, R. Chistov, M. Danilov, V. Eiges, L. Gershtein, Yu. Gershtein, A. Golutvin, O. Igonkina, I. Korolko, G. Kostina, D. Litvintsev, P. Pakhlov, S. Semenov, A. Snizhko, I. Tichomirov, and Yu. Zaitsev

Subjects
Systematic error, Physics, Nuclear and High Energy Physics, Particle physics, Argus, 010308 nuclear & particles physics, FOS: Physical sciences, Observable, 01 natural sciences, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), Dipole, Electric dipole moment, 0103 physical sciences, CP violation, 010306 general physics, computer, Storage ring, Lepton, computer.programming_language
Abstract

Using the ARGUS detector at the e+e- storage ring DORIS II, we have searched for the real and imaginary part of the electric dipole formfactor d_tau of the tau lepton in the production of tau pairs at q^2=100 GeV^2. This is the first direct measurement of this CP violating formfactor. We applied the method of optimised observables which takes into account all available information on the observed tau decay products. No evidence for CP violation was found, and we derive the following results: Re(d_tau)=(1.6+-.9)*10^(-16) ecm and Im(d_tau)=(-0.2+-0.8)*10^(-16) ecm, where statistical and systematic errors have been combined., 8 pages, 5 figures (10 subfigures)

Published
2000

2. Evidence for Λc(2593)+ production

Author

D. O. Litvintsev, R. Mundt, C. Frankl, B. Spaan, H. Thurn, Ruslan Chistov, P. Pakhlov, V. Eiges, R. Waldi, R. P. Hofmann, P. R.B. Saull, D. B. MacFarlane, Sebastian Nowak, D. Wegener, J. Spengler, T. Siegmund, A. Snizhko, W. Schmidt-Parzefall, T. Oest, M. Schramm, H. Kapitza, H. Kuipers, A. Nau, I. Korolko, Michael Schneider, Holger Schulz, Peter Krieger, Sergey Semenov, M. Bracko, G. Kernel, Hermann Kolanoski, H. Wegener, S. Weseler, T. Živko, H. Schröder, T. S. Yoon, R. Schwierz, T. Podobnik, G. Medin, O. Igonkina, Klaus R. Schubert, K. T. Knöpfle, Ivan Belyaev, L. Gershtein, Sergey Barsuk, J.D. Prentice, A. Lindner, M. Schieber, C. Hast, Thomas Hamacher, S. Werner, J. Graf, K. Tzamariudaki, D. Töpfer, A. Lange, M. Walter, R. G. Van de Water, O. Mai, A. Rohde, R. Eckmann, Yu. Zaitsev, K. Reim, H. Albrecht, R. Mankel, R. Wurth, T. Kirchhoff, E. Križnič, P. Križan, A. Golutvin, Yu. Gershtein, J. Stiewe, D. Reßing, I. Tichomirov, M. Schmidtler, A. Hüpper, Vladislav Balagura, Mikhail Danilov, A. Kosche, Werner Hofmann, K. Ehret, G. Kostina, and R. Reiner

Subjects
Baryon, Physics, Nuclear and High Energy Physics, Argus, Electron–positron annihilation, Excited state, DESY, Atomic physics, computer, computer.programming_language
Abstract

Using the ARGUS detector at the e+e− storage ring DORIS II at DESY, we have found evidence for the production of the excited charmed baryon state Λc(2593)+ in the channel Λc+π+π−. Its mass was determined to be (2594.6±0.9±0.4) MeV/c2, and the natural width measured to be Γ = (2.9−2.1−1.4+2.9+1.8) MeV. The production cross section times the branching ratios of σ(e+e− → Λc(2593)+X) × Br(Λc(2593)+ → Λc+π+π−) × Br(Λc+ → pK−π+) was measured to be (0.25−0.13+0.24 ±0.13) pb. The fractions of Λc(2593)+ decays proceeding through the Σc0π+ and Σc++π− channels were determined to be 0.29±0.10±0.11 and 0.37±0.12±0.13, respectively.

Published
1997

3. Two measurements of mixing using kaon tagging

Author

H. Wegener, R. Schwierz, R. G. Van de Water, T. Podobnik, H. Albrecht, J. Spengler, A. Hüpper, T. S. Yoon, R. Mankel, Klaus R. Schubert, R. Waldi, W. Schmidt-Parzefall, R. Wurth, R. Mundt, O. Igonkina, R. P. Hofmann, H. Kuipers, Yu. Gershtein, J. Stiewe, C. Frankl, Ivan Belyaev, A. Nau, S. Werner, C. Hast, Michael Schneider, D. Reßing, Sergey Semenov, G. Kernel, Hermann Kolanoski, M. Walter, H. Thurn, J. D. Prentice, T. Oest, R. Chistov, I. Tichomirov, A. Lange, Sebastian Nowak, J. Graf, K. Ehret, L. Gershtein, D. Wegener, D. Töpfer, P. Eckstein, O. Mai, I. Korolko, D. O. Litvintsev, M. Schramm, Vladislav Balagura, T. Kirchhoff, V. Eiges, B. Spaan, P. Krieger, M. Schieber, H. Kapitza, P. Pakhlov, G. Kostina, Thomas Hamacher, Axel Lindner, K. Reim, M. Schmidtler, R. Reiner, H. Schröder, Mikhail Danilov, R. Eckmann, Yu. Zaitsev, Holger Schulz, A. Kosche, K. T. Knöpfle, E. Križnič, T. Živko, Werner Hofmann, S. Weseler, D. B. Macfarlane, P. R. B. Saull, P. Križan, A. Golutvin, T. Siegmund, K. Tzamariudaki, and A. Snizhko

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Argus, Branching fraction, Electron–positron annihilation, DESY, Multiplicity (mathematics), computer, Mixing (physics), computer.programming_language
Abstract

Using the ARGUS detector at the e+e− storage ring DORIS II at DESY, we have made two measurements of the mixing parameter χd using kaons as flavour tags. Using D∗+ K± correlations we found χd = 0.20 ± 0.13 ± 0.12 and from the study of (D∗+l−) K± correlations we obtained χd = 0.19 ± 0.07 ± 0.09. The branching ratio for B → D∗+ X has been updated: Br(B → D∗+ X) = (19.6 ± 1.9)%. We have also determined the average multiplicity of charged kaons in B0 decays to be 0.78 ± 0.08.

Published
1996

4. Two-photon production of ω pairs

Author

Sebastian Nowak, D. Wegener, Mikhail Danilov, J. Spengler, T. Siegmund, M. Schramm, A. Kosche, R. Mundt, Axel Lindner, K. Ehret, C. Frankl, G. Kernel, R. Chistov, G. Kostina, Ivan Belyaev, R. Reiner, Werner Hofmann, A. Lange, I. Korolko, I. Tichomirov, H. Thurn, T. Oest, W. Schmidt-Parzefall, J. Stiewe, O. Mai, T. S. Yoon, O. Igonkina, D. Reßing, K. T. Knöpfle, J. Graf, V. Eiges, Klaus R. Schubert, H. Kuipers, D. Töpfer, Holger Schulz, P. R. B. Saull, A. Hüpper, H. Wegener, M. Schieber, T. Živko, R. P. Hofmann, T. Podobnik, H. Kapitza, K. Reim, Yu. Gershtein, P. Pakhlov, M. Schmidtler, R. Waldi, S. Weseler, R. G. Van de Water, C. Hast, Michael Schneider, A. Nau, Sergey Semenov, Hermann Kolanoski, Vladislav Balagura, L. Gershtein, Thomas Hamacher, P. Eckstein, R. Schwierz, D. O. Litvintsev, B. Spaan, H. Schröder, M. Walter, S. Werner, Sergey Barsuk, H. Albrecht, R. Mankel, R. Wurth, J. D. Prentice, P. Krieger, T. Kirchhoff, R. Eckmann, Yu. Zaitsev, K. Tzamariudaki, A. Snizhko, E. Križnič, D. B. Macfarlane, P. Križan, and A. Golutvin

Subjects
Physics, Nuclear and High Energy Physics, Cross section (physics), Argus, Two-photon excitation microscopy, Value (computer science), Production (computer science), Maximum likelihood analysis, Atomic physics, computer, Omega, computer.programming_language
Abstract

A maximum likelihood analysis of ARGUS data on two-photon production of π+π+π0π0π−π− is presented. A small fraction of events is due to the production of omega pairs. The γγ → ωω cross section has its maximum value close to threshold.

Published
1996

5. Measurement of the semileptonic branching fractions of the D0 meson

Author

I. Korolko, A. Snizhko, R. G. Van de Water, S. Weseler, Yu. Gershtein, J. Stiewe, R. Waldi, P. R. B. Saull, D. Reßing, M. Schieber, Ivan Belyaev, T. Oest, Klaus R. Schubert, A. Lindner, R. Mundt, M. Walter, J. Graf, D. Töpfer, R. Schwierz, C. Frankl, Mikhail Danilov, Michael Schneider, H. Kapitza, Olga Igonkina, M. Schmidtler, H. Wegener, J. Spengler, T. Siegmund, T. Podobnik, D. O. Litvintsev, H. Thurn, Sebastian Nowak, A. Kosche, T. S. Yoon, B. Spaan, G. Kernel, R. Chistov, P. Pakhlov, D. Wegener, V. Eiges, W. Schmidt-Parzefall, Werner Hofmann, I. Tichomirov, Vladislav Balagura, M. Schramm, L. Gershtein, P. Eckstein, Thomas Hamacher, K. Tzamariudaki, H. Kuipers, A. Nau, Sergey Semenov, Holger Schulz, Hermann Kolanoski, K. T. Knöpfle, H. Schröder, K. Reim, T. Živko, A. Hüpper, R. P. Hofmann, R. Eckmann, Yu. Zaitsev, T. Kirchhoff, S. Werner, H. Albrecht, R. Mankel, R. Wurth, Sergey Barsuk, C. Hast, A. Lange, O. Mai, E. Križnič, P. Krieger, J. D. Prentice, D. B. Macfarlane, P. Križan, A. Golutvin, K. Ehret, G. Kostina, and R. Reiner

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Argus, Annihilation, Meson, Branching fraction, Hadron, Analytical chemistry, Branching (polymer chemistry), computer, Particle Physics - Experiment, computer.programming_language
Abstract

Using the ARGUS detector at the e + e − storage ring DORIS II, we have measured the semileptonic branching ratios of the D 0 meson to be Br ( D 0 → e + ν e X ) = (6.9 ± 0.3 ± 0.5) % and Br ( D 0 → μ + ν μ X ) = (6.0 ± 0.7 ± 1.2) %, and the semileptonic branching ratio of the charmed hadron mixture from e + e − annihilation around 10 GeV to be Br ( c → e + ν e X ) = (9.6 ± 0.4 ± 1.1) %.

Published
1996

6. A measurement of the electronic widths Γ ee of the ϒ(1S), ϒ(2S), and ϒ(4S) resonances, and of the total decay width Γ of the ϒ(4S)

Author

R. P. Hofmann, S. Werner, P. Pakhlov, Ivan Belyaev, P. R. B. Saull, A. Snizhko, A. Hüpper, Peter Krieger, H. Wegener, T. Kirchhoff, Michael Schneider, Sebastian Nowak, D. Wegener, R. Schwierz, T. Podobnik, J. Spengler, A. Nau, Sergey Semenov, R. G. Van de Water, I. Korolko, H. Kapitza, D. Töpfer, Holger Schulz, C. Hast, T. Siegmund, A. Lindner, A. Lange, Hermann Kolanoski, M. Walter, P. Križan, W. Schmidt-Parzefall, A. Golutvin, G. Kernel, R. Chistov, M. Schmidtler, T. Živko, O. Mai, M. Schramm, R. Mundt, H. Schröder, H. Kuipers, Thomas Hamacher, T. Oest, M. Schieber, L. Gershtein, E. Križnič, H. Albrecht, R. Mankel, R. Wurth, K. Tzamariudaki, H. Thurn, P. Eckstein, Mikhail Danilov, D. O. Litvintsev, Vladislav Balagura, A. Kosche, K. T. Knöpfle, R. Waldi, T. S. Yoon, R. Eckmann, Werner Hofmann, Klaus R. Schubert, I. Tichomirov, Yu. Zaitsev, B. Spaan, W. Funk, J. D. Prentice, K. Reim, C. Frankl, S. Weseler, Yu. Gershtein, J. Stiewe, D. Reßing, Sergey Barsuk, K. Ehret, G. Kostina, R. Reiner, and D. B. MacFarlane

Subjects
Physics, Argus, Physics and Astronomy (miscellaneous), Electron–positron annihilation, Resonance, Elementary particle, DESY, Electron, Nuclear physics, Radiative transfer, Atomic physics, Engineering (miscellaneous), computer, Storage ring, computer.programming_language
Abstract

The partial decay width into electrons, Γ ee , of the ϒ(1S) and ϒ(2S) resonances have been measured with the detector ARGUS at thee+e− storage ring DORISII of DESY. Applying the formula of Kuraev and Fadin for the radiative corrections we find: Γ ee (ϒ(1S))= (1.32±0.04±0.03) keV and Γ ee (ϒ(2S))=(0.52±0.03±0.01) keV. The total decay width of the ϒ(4S) resonance and its partial width into electrons have been determined as well. Fitting the data with a generalized Breit-Wigner function with an energy dependent decay width Γ(s) and a mass shift functionm(s), we obtain the following resonance parameters: Γ(M2)=(10.0±2.8±2.7) MeV, Γ ee =(0.28±0.05±0.01)keV andB ee =(2.77±0.50±0.49)·10−5. We argue that the disagrecment of this result with the world average originates from our more adequate parametrization of the observed ϒ(4S) resonance cross section.

Published
1995

7. Measurement of the decay D* s2 + (2573) → D0K+

Author

J. Spengler, K. Ehret, T. Siegmund, S. Weseler, Lnn Tichomirov, Axel Lindner, D. Reßing, Sebastian Nowak, K. Reim, G. Kernel, Holger Schulz, D. Wegener, T. S. Yoon, H. Schröder, A. Lange, T. Kirchhoff, J. Graf, Thomas Hamacher, D. Töpfer, D. B. MacFarlane, W. Schmidt-Parzefall, O. Mai, I. Korolko, E. Križnič, M. Schramm, T. Živko, G. Kostina, M. Schmidtler, R. Waldi, R. P. Hofmann, P. R.B. Saull, Yu. Gershtein, R. Mundt, R. Reiner, K. T. Knöpfle, H. Albrecht, C. Frankl, J.D. Prentice, R. Mankel, R. Wurth, H. Kuipers, M. Schieber, H. Thurn, K. Tzamariudaki, Vladislav Balagura, Mikhail Danilov, I. Bleyaev, K. R. Schubert, H. Kapitza, P. Pakhlov, V. Eiges, Peter Krieger, A. Snizhko, R. Eckmann, P. Križan, A. Golutvin, Yu. Zaitsev, A. Kosche, R. G. Van de Walter, Werner Hofmann, A. Hüpper, L. Gershtein, C. Hast, Michael Schneider, Ruslan Chistov, Sergey Barsuk, R. Schwierz, T. Oest, H. Wegener, T. Podobnik, A. Nau, Sergey Semenov, Hermann Kolanoski, P. Eckstein, D. O. Litvintsev, B. Spaan, and M. Walter

Subjects
Nuclear physics, Physics, Cross section (physics), Argus, Physics and Astronomy (miscellaneous), Meson, Branching fraction, Detector, Value (computer science), DESY, computer, Storage ring, computer.programming_language
Abstract

Using the ARGUS detector at the e+e− storage ring DORIS II at DESY we have measured the parameters of a charmed strange meson D* s2 + (2573) decaying into D0K+. The mass of this state was found to be (2574.5±3.3±1.6) MeV/c 2. The measured value of its width is (10.4±8.3±3.0) MeV and the product of the production cross section and branching ratio for this channel was determined to be (10.6±4.2 −1.2 +2.3 ) pb.

Published
1995

8. Measurement of the decay fractions ofD * mesons

Author

A. Hüpper, T. Siegmund, V. Lubimov, J. D. Prentice, C. Frankl, R. Waldi, D. O. Litvintsev, Sebastian Nowak, D. Wegener, C. Hast, A. Lange, O. Mai, B. Spaan, H. Kapitza, I. Tichomirov, M. Schramm, Ivan Belyaev, G. Kostina, Manfred Paulini, I. Korolko, R. Schwierz, D. B. MacFarlane, P. Križan, Alexander Undrus, A. Golutvin, Mikhail Danilov, D. Töpfer, Michael Schneider, A. Kosche, Yuri Gershtein, A. Droutskoy, Klaus R. Schubert, K. Tzamariudaki, Vladimir Blinov, Peter Krieger, Werner Hofmann, H. Albrecht, R. Mankel, R. Wurth, R. Reiner, A. Snizhko, M. Schieber, R. Mundt, T. S. Yoon, P. Eckstein, Thomas Hamacher, P. R. B. Saull, R. P. Hofmann, H. Thurn, R. Eckmann, Yu. Zaitsev, S. Werner, E. Križnič, S. Chechelnitsky, T. Kirchhoff, R. G. Van de Water, M. Walter, P. Pakhlov, S. Khan, J. Stiewe, K. Ehret, K. T. Knöpfle, D. Reßing, H. Schröder, J. Spengler, G. Kernel, Holger Schulz, T. Živko, V. Zhilich, W. Schmidt-Parzefall, H. Kuipers, A. Nau, Sergey Semenov, Hermann Kolanoski, H. Wegener, T. Podobnik, A. Lindner, C. Ratz, T. Oest, K. Reim, S. Weseler, H. Ehrlichmann, M. Schmidtler, and Vladislav Balagura

Subjects
Physics, Argus, Nuclear magnetic resonance, Physics and Astronomy (miscellaneous), Meson, Electron–positron annihilation, Analytical chemistry, Engineering (miscellaneous), computer, computer.programming_language
Abstract

Using the ARGUS detector at the DORIS II electron-positron storage ring at DESY, we have measured BR(D*+→D0π+)=(68.8±2.4±1.3)%, BR(D*+→D+π0)=(31.2±1.1±0.8)%, BR(D*+→D+γ)

Published
1995

9. A search for the lepton-flavour violating decays τ → eα, τ → μα

Author

Holger Schulz, Sebastian Nowak, D. Wegener, T. Živko, R. Schwierz, M. Schramm, H. Schröder, S. Weseler, P. Pakhlov, H. Wegener, A. Golutvin, P. R. B. Saull, J. Spengler, T. Kirchhoff, A. Hüpper, T. Podobnik, C. Hast, I. Korolko, Ivan Belyaev, Klaus R. Schubert, A. Lange, V. Eiges, M. Walter, R. Mundt, K. Ehret, A. Snizhko, H. Kapitza, O. Mai, C. Frankl, H. Thurn, Michael Schneider, G. Kostina, P. Eckstein, Yu. Gershtein, D. O. Litvintsev, M. Schmidtler, W. Schmidt-Parzefall, T. Oest, O. Igonkina, B. Spaan, R. Reiner, H. Kuipers, A. Nau, Sergey Semenov, R. P. Hofmann, Hermann Kolanoski, R. Eckmann, Yu. Zaitsev, S. Werner, J. Graf, J. Stiewe, Mikhail Danilov, D. Töpfer, D. Reßing, R. G. Van de Water, Vladislav Balagura, R. Waldi, P. Križnič, A. Kosche, K. Tzamariudaki, Thomas Hamacher, Werner Hofmann, I. Tichomirov, T. S. Yoon, G. Kernel, R. Chistov, M. Schieber, K. T. Knöpfle, L. Gershtein, D. B. MacFarlane, K. Reim, H. Albrecht, R. Mankel, R. Wurth, Sergey Barsuk, P. Kreger, J. D. Prentice, T. Siegmund, and A. Lindner

Subjects
Physics, Particle physics, Argus, Physics and Astronomy (miscellaneous), Physics::Instrumentation and Detectors, Electron–positron annihilation, High Energy Physics::Phenomenology, Flavour, DESY, Spectral line, Nuclear physics, High Energy Physics::Experiment, Engineering (miscellaneous), computer, Storage ring, Lepton, computer.programming_language
Abstract

Lepton spectra in τ decays have been studied with the ARGUS detector at thee+e− storage ring DORIS II at DESY using the “pseudo-rest-frame” technique. We have improved upper limits for two-body τ-decays into a lepton and an unobservable particle.

Published
1995

10. The first measurement of the Michel parameter η in τ decays

Author

Mikhail Danilov, Ivan Belyaev, G. Kostina, Klaus R. Schubert, T. S. Yoon, R. Schwierz, S. Weseler, A. Nau, Sergey Semenov, D. O. Litvintsev, R. Reiner, A. Kosche, Yuri Gershtein, B. Spaan, Hermann Kolanoski, D. Töpfer, I. Korolko, P. Pakhlov, P. Eckstein, H. Schröder, R. P. Hofmann, P. R.B. Saull, V. Lubimov, T. Siegmund, Werner Hofmann, Sebastian Nowak, D. Wegener, M. Schmidtler, R. G. Van de Water, I. Tichomirov, J. Stiewe, H. Wegener, K. T. Knöpfle, S. Chechelnitsky, R. Mundt, D. Reßing, P. Krieger, K. Ehret, A. Snizhko, C. Hast, H. Thurn, T. Podobnik, J. Spengler, Michael Schneider, E. Križnič, H. Kapitza, A. Hüpper, D. B. MacFarlane, Holger Schulz, K. Reim, J. D. Prentice, R. Waldi, Axel Lindner, T. Živko, A. Droutskoy, G. Kernel, A. Lange, C. Frankl, M. Walter, T. Oest, O. Mai, M. Schieber, R. Eckmann, Thomas Hamacher, Yu. Zaitsev, S. Werner, K. Tzamariudaki, P. Križan, A. Golutvin, W. Schmidt-Parzefall, Vladislav Balagura, H. Kuipers, T. Kirchhoff, H. Albrecht, R. Mankel, and R. Wurth

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Argus, Electron–positron annihilation, Hadron, DESY, Spectral line, Vertex (geometry), Nuclear physics, High Energy Physics::Experiment, computer, Storage ring, computer.programming_language, Lepton
Abstract

Using the ARGUS detector at the e+e - storage ring DORIS II at DESY, we have studied lepton energy spectra in ~- decays. We present a "pseudo-rest-frame" technique in which the second r in the event, decaying into a heavy hadronic system, is used as reference. This method allows for the first measurement of the Michel Parameter 7/in ~- decays. We also determine the Michel Parameter p in 7" --~ e~u decays with a precision comparable to the present world average. The measured values of the parameters p = 0.735 4- 0.036 4- 0.020 and r 1 = 0.03 4- 0.18 4- 0.12 are in good agreement with standard V-A coupling at the ~--~,-W vertex.

Published
1995

11. Evidence for W-exchange in charmed baryon decays

Author

S. Werner, D. O. Litvintsev, H. Schröder, Vladislav Balagura, B. Spaan, M. Walter, H. Wegener, Klaus R. Schubert, P. Krieger, T. Podobnik, I. Tichomirov, V. Lubimov, R. Waldi, M. Schieber, R. Mundt, I. Korolko, G. Kostina, H. Albrecht, R. Mankel, R. Wurth, P. R. B. Saull, Sebastian Nowak, D. Wegener, P. Križan, A. Golutvin, P. Eckstein, H. Thurn, Axel Lindner, Thomas Hamacher, S. Weseler, R. Schwierz, R. Reiner, Sally Seidel, H. Kapitza, A. Hüpper, T. Oest, Ivan Belyaev, Holger Schulz, J. D. Prentice, E. Križnič, A. Nau, Sergey Semenov, J. Stiewe, W. Schmidt-Parzefall, A. Snizhko, C. Frankl, R. P. Hofmann, S. Chechelnitsky, Hermann Kolanoski, K. Ehret, M. Schmidtler, H. Kuipers, C. E. K. Charlesworth, D. Töpfer, K. T. Knöpfle, T. Živko, T. Kirchhoff, D. B. Macfarlane, Mikhail Danilov, U. Becker, A. Droutskoy, D. Reßing, P. Pakhlov, T. Siegmund, J. Spengler, A. Kosche, A. Lange, G. Kernel, P. Eckmanm, K. Reim, O. Mai, Werner Hofmann, C. Hast, Michael Schneider, Yu. Zaitsev, Yu. Gershtein, T. S. Yoon, R. G. Van de Water, and K. Tzamariudaki

Subjects
Nuclear physics, Physics, Baryon, Nuclear and High Energy Physics, Argus, Particle physics, Branching fraction, Electron–positron annihilation, Mass spectrum, DESY, computer, computer.programming_language
Abstract

Using the detector ARGUS at the e+e− storage ring DORIS II at DESY, we have observed the decays Λc+ → Ξ−K+π+ and Λc+ → Ξ∗0K+ and obtained evidence for the decay Ξc0 → ΛKs0. All three of these decays are of interest as they provide information about W-exchange processes. The products of cross sections and branching ratios for Λc+ → Ξ−K+π+ and Λc+ → Ξ∗0K+ are (1.7±0.3±0.3) pb and (0.6±0.2±0.1) pb, respectively, which implies that (35±17) % of the Ξ−K+π+ final state is generated through a two-body decay via intermediate W-exchange. The product of production cross section and branching ratio for Ξc0 → Λ Ks0 is (2.1 ± 1.0 ± 0.6) pb.

Published
1995

12. Measurement of the polarization in the decay

Author

A. Snizhko, Holger Schulz, W. Schmidt-Parzefall, H. Kapitza, T. Živko, Ivan Belyaev, K. Tzamariudaki, H. Kuipers, R. Mundt, D. Töpfer, Yu. Gershtein, S. Weseler, R. G. Van de Water, Mikhail Danilov, L. Gershtein, H. Thurn, J. Stiewe, M. Schieber, Sebastian Nowak, T. Siegmund, R. Waldi, A. Droutskoy, D. Wegener, I. Korolko, E. Križnič, A. Kosche, G. Kostina, P. Pakhlov, M. Schramm, A. Lange, T. Kirchhoff, D. B. Macfarlane, Werner Hofmann, A. Hüpper, K. Reim, H. Wegener, T. Podobnik, R. Reiner, O. Mai, Vladislav Balagura, T. S. Yoon, K. T. Knöpfle, Axel Lindner, S. Barsuk, C. Hast, Michael Schneider, R. Chistov, I. Tichomirov, Klaus R. Schubert, D. Reβing, A. Nau, Sergey Semenov, H. Albrecht, R. Mankel, Hermann Kolanoski, J. Spengler, R. Wurth, T. Oest, P. R. B. Saull, P. Križan, A. Golutvin, M. Schmidtler, G. Kernel, Thomas Hamacher, K. Ehret, R. Schwierz, D. O. Litvintsev, B. Spaan, P. Eckstein, H. Schröder, M. Walter, R. P. Hofmann, P. Krieger, J. D. Prentice, C. Frankl, S. Werner, R. Eckmann, and Yu. Zaitsev

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Argus, Particle physics, Electron–positron annihilation, CP violation, Polarization (waves), computer, Storage ring, computer.programming_language
Abstract

Polarization in the exclusive decay B → J/ψK ∗ was measured using the ARGUS detector at the e+e− storage ring DORIS II. The ratio of the transverse to the total decay width was found to be ΓT/Γ = 0.03±0.16±0.15. This measurement demonstrates that the B 0 → J/ψK ∗0 decay channel can be effectively used for CP violation studies.

Published
1994

13. Measurement of the absolute branching fractions for D0 decays into

Author

Sebastian Nowak, D. Wegener, M. Walter, R. Schwierz, V. Lubimov, E. Gershtein, M. Schieber, M. Schmidtler, T. Oest, W. Schmidt-Parzefall, I. Korolko, G. Kernel, Klaus R. Schubert, R. Eckmann, Yu. Zaitsev, H. Schröder, H. Kuipers, H. Wegener, C. Hast, S. Werner, T. Kirchhoff, R. G. Van de Water, T. Podobnik, A. Lange, S. Barsuk, G. Kostina, A. Lindner, R. Waldi, T. Siegmund, D. O. Litvintsev, O. Mai, Michael Schneider, Vladislav Balagura, Mikhail Danilov, John D. Spengler, T. S. Yoon, B. Spaan, Thomas Hamacher, H. Albrecht, R. Reiner, R. Mankel, R. Wurth, P. Pakhlov, K. T. Knöpfle, P. R. B. Saull, H. Kapitza, P. Eckstein, K. Ehret, R. P. Hofmann, M. Schram, Ivan Belyaev, A. Kosche, D. Töpfer, A. Droutskoy, Werner Hofmann, I. Tichomirov, Holger Schulz, A. Nau, Sergey Semenov, Hermann Kolanoski, A. Hüpper, T. Živko, K. Tzamariudaki, R. Mundt, A. Snizhko, H. Thurn, J. Stiewe, D. Reβing, K. Reim, Yu. Gershtein, S. Weseler, P. Krieger, J. D. Prentice, C. Frankl, E. Križnič, D. B. Macfarlane, P. Križan, and A. Golutvin

Subjects
Physics, Nuclear physics, Nuclear and High Energy Physics, Argus, Crystallography, Angular distribution, Meson, Electron–positron annihilation, Branching (polymer chemistry), computer, computer.programming_language
Abstract

Using the ARGUS detector at the e+ e− storage ring DORIS II we have measured the absolute branching ratios of the D0 meson, Br(D0→K− π+)=(3.41±0.12±0.28)%, Br(D0→K− π+ π+ π−)=(6.80± 0.27±0.57)%, and Br (D 0 → K 0 π + π − )=(5.03±0.39±0.49)% .

Published
1994

14. Determination of the radiative decay width of the η meson

Author

I. Korolko, Klaus R. Schubert, K. Reim, Sebastian Nowak, Mikhail Danilov, A. Hüpper, D. Wegener, A. Kosche, J. Spengler, Werner Hofmann, G. Kostina, R. Mundt, A. Nau, Sergey Semenov, T. Oest, K. Tzamariudaki, H. Albrecht, Thomas Hamacher, Hermann Kolanoski, R. Mankel, R. Wurth, Yu. Gershtein, M. Schramm, S. Werner, R. Reiner, T. S. Yoon, H. Thurn, P. Kržan, A. Snizhko, P. Eckstein, H. Kapitza, H. Wegener, V. Lubimov, S. Weseler, P. Pakhlov, M. Walter, D. O. Litvintsev, D. Reβing, P. Krieger, Ivan Belyaev, T. Podobnik, G. Kernel, B. Spaan, J. Stiewe, J. D. Prentice, R. G. Van de Water, C. Frankl, D. Töpfer, Axel Lindner, Holger Schulz, R. P. Hofmann, C. Hast, Michael Schneider, T. Kirchhoff, S. Chechelnitsky, R. Schwierz, M. Schmidtler, T. Živko, R. Waldi, M. Schieber, K. Ehret, A. Droutskoy, H. Schröder, R. Eckmann, Yu. Zaitsev, K. T. Knöpfle, A. Golutvin, E. Križnič, D. B. Macfarlane, Vladislav Balagura, A. Lange, O. Mai, W. Schmidt-Parzefall, H. Kuipers, P. R. B. Saull, T. Siegmund, and I. Tichomirov

Subjects
Physics, Nuclear physics, Nuclear and High Energy Physics, Argus, Meson, Branching fraction, Radiative decay, Mass spectrum, Value (computer science), Atomic physics, computer, computer.programming_language
Abstract

An analysis of the reaction yy ~ r/c was l~erformed in five different decay channels of the r/c: /~sK+~r ~, K+K-Tr+~ "- , 27r+21r -, ~b~b and 2K+2K -. A value Fry(r/c) = ( 11.3 + 4.2) keV was obtained for the radiative decay width by combining the results from the first four channels. Using our result on the two-photon width we also determined the branching ratio for the decay r/c --~ 2K+2K -.

Published
1994

15. Study ofD 0 andD + decays into final states with two or three kaons

Author

C. Hast, P. R. B. Saull, S. Weseler, T. Siegmund, I. Korolko, V. Lubimov, P. Križan, A. Golutvin, R. Schwierz, Klaus R. Schubert, R. Waldi, G. Kostina, A. Lange, O. Mai, M. Schmidtler, E. Križnič, Sebastian Nowak, D. B. MacFarlane, R. Mundt, D. Wegener, I. Tichomirov, R. Chistov, D. O. Litvintsev, H. Wegener, A. Droutskoy, R. Reiner, J. D. Prentice, A. Lindner, A. Snizhko, B. Spaan, C. Frankl, T. Podobnik, H. Thurn, M. Schramm, R. Eckmann, Yu. Zaitsev, K. Reim, Vladislav Balagura, A. Hüpper, P. Pakhlov, Ivan Belyaev, R. P. Hofmann, T. S. Yoon, P. Eckstein, T. Oest, S. Chechelnitsky, D. Töpfer, Peter Krieger, K. Tzamariudaki, Mikhail Danilov, K. Ehret, Holger Schulz, A. Kosche, T. Živko, Werner Hofmann, R. G. Van de Water, John D. Spengler, H. Albrecht, R. Mankel, R. Wurth, T. Kirchhoff, H. Kapitza, K. T. Knöpfle, Thomas Hamacher, A. Nau, Sergey Semenov, Hermann Kolanoski, W. Schmidt-Parzefall, M. Walter, G. Kernel, H. Kuipers, M. Schieber, H. Schröder, Yu. Gershtein, S. Barsuk, Michael Schneider, J. Stiewe, D. Reßing, and S. Werner

Subjects
Physics, Argus, Particle physics, Physics and Astronomy (miscellaneous), Meson, Branching fraction, Model prediction, Elementary particle, Nuclear physics, Field theory (psychology), Quantum field theory, Engineering (miscellaneous), computer, Storage ring, computer.programming_language
Abstract

Using the ARGUS detector at thee+e− storage ring DORIS II, we have studied Cabibbo-suppressedD0 decay modes resulting in theK+K−π+π− final state and two-bodyD0 decay modes with a ϕ meson in the final state. TheBR(D0→KS0KS0π+π− was measured for the first time. We also present a measurement of theD+→KS0KS0K+ branching ratio. The values are compared with other experimental results and model predictions.

Published
1994

16. Reconstruction of the decay B− → D10(2414) π−

Author

M. Walter, Holger Schulz, S. Chechelnitsky, H. Wegener, T. Podobnik, Michael Schneider, J. Stiewe, K. T. Knöpfle, K. Ehret, I. Tichomirov, Klaus R. Schubert, M. Schieber, T. Živko, T. Oest, R. Schwierz, G. Kostina, John D. Spengler, V. Lubimov, A. Lindner, H. Albrecht, R. Mankel, Sebastian Nowak, I. Korolko, Mikhail Danilov, R. Mundt, R. P. Hofmann, R. Wurth, D. Wegener, H. Schröder, G. Kernel, K. Reim, A. Kosche, P. Križan, A. Golutvin, H. Thurn, P. R. B. Saull, T. Kirchhoff, Vladislav Balagura, W. Schmidt-Parzefall, Werner Hofmann, A. Hüpper, P. Pakhlov, C. Hast, A. Droutskoy, Yu. Gershtein, T. Siegmund, T. S. Yoon, S. Weseler, K. Tzamariudaki, H. Kuipers, A. Nau, Sergey Semenov, A. Lange, R. Eckmann, Hermann Kolanoski, Yu. Zaitsev, A. Snizhko, D. Reβing, P. Eckstein, D. O. Litvintsev, R. G. Van de Water, B. Spaan, M. Schmidtler, S. Werner, Ivan Belyaev, E. Križnič, D. B. Macfarlane, D. Töpfer, R. Waldi, O. Mai, H. Kapitza, Thomas Hamacher, J. D. Prentice, C. Frankl, R. Reiner, and P. Krieger

Subjects
Physics, Nuclear and High Energy Physics, Argus, Meson, Excited state, Analytical chemistry, Atomic physics, computer, computer.programming_language
Abstract

We present the results of a partial reconstruction of the decay channel B − → D j (∗) π − performed using the ARGUS detector operating at the e+e− storage-ring DORIS II. In the context of this paper, D j (∗)0 is an L = 1 excited charm meson decaying to D ∗+ π − . The measured product of branching ratios is Br(B − → D 1 0 (2414)π − ) · Br Br(D 1 0 → D ∗+ π − ) = (0.17 ± 0.05 ± 0.04)% where the first error is statistical and statistical and the second systematic. No evidence for the decay B − → D 2 ∗0 (2459) π − ) · Br(D 2 ∗0 → D ∗+ π − ) at the 90% confidence level.

Published
1994

17. Kaons in flavour taggedB decays

Author

K. T. Knöpfle, V. Lubimov, A. Nau, Sergey Semenov, J. Spengler, G. Kernel, Hermann Kolanoski, H. I. Cronström, J. D. Prentice, M. Schieber, M. Walter, Dave Britton, J. Stiewe, P. M. Patel, Ivan Belyaev, A. Hüpper, D. O. Litvintsev, H. Albrecht, E. Križnič, H. Schröder, P. Pakhlov, Manfred Paulini, R. Wurth, B. Spaan, W. Funk, R. Waldi, D. Reßing, Sebastian Nowak, D. Wegener, R. P. Hofmann, T. S. Yoon, Leif J. Jönsson, S. Werner, Fedor Ratnikov, M. Bittner, K. Tzamariudaki, T. Kirchhoff, Michael Schneider, Peter Krieger, T. Oest, D. B. MacFarlane, C. Hast, D. Töpfer, K. Strahl, Vladislav Balagura, P. Eckstein, M. Seeger, A. Droutskoy, W. Schmidt-Parzefall, H. Wegener, A. Lange, P. R. B. Saull, I. Tichomirov, Thomas Hamacher, Yu. Zaitsev, V. Soloshenko, T. Podobnik, Yu. Gershtein, C. E. K. Charlesworth, A. Snizhko, Holger Schulz, A. Lindner, T. Siegmund, E.R.F. Hyatt, R. G. Van de Water, K. W. Edwards, P. Križan, A. Golutvin, S. Khan, T. Živko, Mikhail Danilov, H. Kapitza, A. Kosche, Werner Hofmann, R. Mundt, H. Thurn, S. Weseler, H. Ehrlichmann, M. Schmidtler, K. Reim, Rainer Mankel, K. R. Schubert, S. Chechelnitsky, K. Ehret, G. Kostina, and R. Reiner

Subjects
Physics, Particle physics, Argus, Physics and Astronomy (miscellaneous), Meson, Electron–positron annihilation, High Energy Physics::Phenomenology, Flavour, Nuclear physics, Angular distribution, High Energy Physics::Experiment, Nuclear Experiment, Engineering (miscellaneous), computer, Storage ring, Lepton, computer.programming_language
Abstract

Using the ARGUS detector at thee+e− storage ring DORIS II, flavour-dependent kaon production inB meson decays has been studied. Using the leptons as flavour tags, it has been possible to separately measure the multiplicities ofK+,K− andKs0 in inclusiveB decays and in semileptonicB decays. The kaon production in semileptonicB decays was further used to estimate the ratio of charmed decays over all decays, and thus also the fraction of charmlessB decays.

Published
1994

18. Observation of γγ → φϱ0 and γγ → φω

Author

H. Wegener, T. Podobnik, V. Lubimov, Sebastian Nowak, I. Korolko, D. Wegener, T. Oest, D. O. Litvintsev, T. Siegmund, C. E.K. Charlesworth, M. Schieber, A. Hüpper, M. Walter, John D. Spengler, D. B. MacFarlane, K. Reim, S. Chechelnitsky, K. Tzamariudaki, Michael Schneider, P. Krieger, B. Spaan, P. Pakhlov, K. Ehret, H. Kapitza, E. Križan, H. Albrecht, R. Mankel, A. Droutskoy, R. Wurth, W. Schmidt-Parzefall, G. Kernel, A. Nau, C. Franki, C. Hast, R. Mundt, Sergey Semenov, Vladislav Balagura, M. Seeger, R. Eckmann, K. W. Edwards, R. Schwierz, A. Lange, H. Schröder, Yu. Zaitsev, S. Werner, T. Kirchhoff, Klaus R. Schubert, Hermann Kolanoski, R. P. Hofmann, P. R.B. Saull, G. Kostina, Thomas Hamacher, H. Thurn, Manfred Paulini, Dave Britton, I. Tichomirov, R. Reiner, P.M. Patel, R. Waldi, R. G. Van de Water, Holger Schulz, S. Khan, T. S. Yoon, E. R.F. Hyatt, A. Lindner, T. Živko, P. Eckstein, Ivan Belyaev, Mikhail Danilov, D. Töpfer, A. Kosche, Yuri Gershtein, A. Snizhko, Werner Hofmann, K. T. Knöpfle, J. D. Prentice, M. Schmidtler, J. Stiewe, D. Reßing, S. Weseler, H. Ehrlichmann, P. Križan, and A. Golutvin

Subjects
Physics, Nuclear physics, Nuclear and High Energy Physics, Particle physics, Argus, Hadron, DESY, computer, Storage ring, computer.programming_language
Abstract

Two-photon production of the hadronic final states K + K − π + π − and K + K − π + π 0 π − has been studied using the ARGUS detector at the e + e − storage ring DORIS II at DESY. The cross sections of the reactions γγ → oϱ 0 and γγ → oω have been measured for the first time. In addition, angular distrubutions have been determined for the reaction γγ → oϱ 0 → K + K − π + π − .

Published
1994

19. Observation of polarization effects in Λc+ semileptonic decay

Author

R. Waldi, I. Korolko, C. Hast, S. Weseler, M. Seeger, A. Lange, Mikhail Danilov, Sebastian Nowak, D. Wegener, O. Mai, H. Ehrlichmann, Holger Schulz, A. Kosche, Ivan Belyaev, H. Kapitza, H. Wegener, R. Eckmann, D. Töpfer, Yu. Gershtein, H. Albrecht, Yu. Zaitsev, S. Werner, Klaus R. Schubert, Thomas Hamacher, H. Kuipers, Werner Hofmann, M. Schmidtler, R. Mankel, J. Stiewe, I. Tichomirov, R. Wurth, K. Tzamariudaki, T. Živko, Michael Schneider, T. Podobnik, P. R. B. Saull, P. Krieger, P. Pakhlov, R. P. Hofmann, T. Kirchhoff, V. Lubimov, J. D. Prentice, T. Siegmund, G. Kostina, D. Reβing, K. Reim, C. Frankl, T. Oest, R. Mundt, R. Reiner, A. Hüpper, H. Thurn, A. Snizhko, A. Nau, Sergey Semenov, S. Chechelnitsky, Hermann Kolanoski, K. Ehret, Vladislav Balagura, A. Droutskoy, P. Križan, H. Schröder, A. Golutvin, M. Walter, P. Eckstein, E. Križnič, D. B. Macfarlane, R. Schwierz, D. O. Litvintsev, W. Schnidt-Parzefall, B. Spaan, T. S. Yoon, J. Spengler, G. Kernel, M. Schieber, R. G. Van de Water, A. Lindner, S. Khan, and K. T. Knöpfle

Subjects
Physics, Semileptonic decay, Nuclear and High Energy Physics, Particle physics, Argus, media_common.quotation_subject, Electron–positron annihilation, Elementary particle, Polarization (waves), Asymmetry, Baryon, Nuclear physics, Particle decay, computer, media_common, computer.programming_language
Abstract

Polarization of the Λ daughter baryon from Λc+ → Λl+ vl decay has been measured for the first time using the ARGUS detector at the DORIS II ϵ+ϵ− storage ring. Expressed in terms of the Λc+ semileptonic asymmetry parameter the result is αΛc= −0.91±0.49 for events in the mass region 1.85

Published
1994

20. Observation of a new charmed baryon

Author

P. Krieger, J. D. Prentice, R. Waldi, K. W. Edwards, K. T. Knöpfle, Ivan Belyaev, A. Hüpper, I. Korolko, E. Križnič, P. R. B. Saull, K. Tzamariudaki, K. Strahl, R. Mundt, Vladislav Balagura, V. Lubimov, B. Spaan, J. Stiewe, H. Thurn, K. R. Schubert, A. Snizhko, T. Siegmund, S. Chechelnitsky, Sebastian Nowak, H. Schröder, S. Werner, D. Wegener, D. Töpfer, D. B. Macfarlane, Dmitry Litvintsev, M. Bittner, K. Reim, Thomas Hamacher, H. Wegener, G. Kernel, Dave Britton, K. Ehret, T. Podobnik, H. Kapitza, Holger Schulz, E.R.F. Hyatt, I. Tichomirov, M. Schieber, W. Schmidt-Parzefall, M. Walter, A. Nau, Rainer Mankel, Sergey Semenov, Manfred Paulini, P. M. Patel, Hermann Kolanoski, S. Weseler, C. Hast, C. E. K. Charlesworth, T. Živko, P. Križan, A. Golutvin, R. Eckmann, Yu. Zaitsev, M. Seeger, R. P. Hofmann, H. Ehrlichmann, A. Lange, G. Kostina, T. Kirchhoff, P. Pakhlov, John D. Spengler, M. Schmidtler, R. Reiner, Yu. Gershtein, A. Lindner, Mikhail Danilov, Michael Schneider, H. Albrecht, R. Wurth, A. Droutskoy, A. Kosche, D. Reβing, Werner Hofmann, T. Oest, P. Eckstein, T. S. Yoon, R. G. Van de Water, and S. Khan

Subjects
Nuclear physics, Physics, Baryon, Nuclear and High Energy Physics, Argus, Branching fraction, Electron–positron annihilation, Elementary particle, Charge (physics), DESY, computer, Storage ring, computer.programming_language
Abstract

Using the ARGUS detector at the e+e− storage ring DORIS II at DESY, we have observed a new charmed baryon state in the channel Λc+π+π−. (All references to a specific charged state also imply the charge conjugate state.) The mass of this state was measured to be (2626.6 ± 0.5 ± 1.5) MeV/c2. The product of the production cross section and branching ratio for this channel was determined to be (11.5 ± 2.5 ± 3.0) pb, and the natural width estimated to be smaller than 3.2 MeV/c2 at 90% CL.

Published
1993

21. A determination of two Michel parameters in purely leptonic tau decays

Author

D. Reβing, Yu. Gershtein, V. Lubimov, A. Nau, Sergey Semenov, Hermann Kolanoski, K. Reim, Rainer Mankel, K. T. Knöpfle, H. Schröder, S. Weseler, Dave Britton, T. S. Yoon, J. D. Prentice, K. Strahl, Vladislav Balagura, H. Ehrlichmann, C. Hast, H. Kapitza, M. Seeger, A. Lange, M. Schmidtler, A. Lindner, Michael Schneider, M. Schieber, P. Krieger, E.R.F. Hyatt, M. Walter, Andreas Kirchhoff, Ivan Belyaev, R. Waldi, A. Droutskoy, R. Mundt, P. Eckstein, D. O. Litvintsev, D. Töpfer, B. Spaan, W. Funk, H. Thurn, R. G. Van de Water, Holger Schulz, S. Khan, G. Kernel, P. R. B. Saull, T. Živko, Thomas Hamacher, V. Soloshenko, T. Siegmund, P. Pakhlov, R. P. Hofmann, K. R. Schubert, Manfred Paulini, S. Chechelnitsky, K. Tzamariudaki, K. Ehret, W. Schmidt-Parzefall, G. Kostina, C. E. K. Charlesworth, R. Reiner, H. Wegener, P. M. Patel, I. Tichomirov, R. Eckmann, Yu. Zaitsev, T. Podobnik, S. Werner, M. Bittner, A. Hüpper, Fedor Ratnikov, T. Oest, Mikhail Danilov, A. Kosche, Werner Hofmann, A. Snizhko, John D. Spengler, H. Albrecht, R. Wurth, Sebastian Nowak, D. Wegener, E. Križnič, D. B. Macfarlane, P. Križan, A. Golutvin, K. W. Edwards, and J. Stiewe

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Argus, Muon, Electron–positron annihilation, Elementary particle, Electron, Spectral line, Nuclear physics, Momentum, Michel parameters, computer, computer.programming_language
Abstract

Using the ARGUS detector at the e+e− storage ring DORIS II, we have determined the Michel parameters ϱ and ξ of τ → μν ν and τ → eν ν decays. From a data sample with 333 events/pb around s = 10 GeV , we select 3230 events e + e − → τ + τ − → (μ ± μ μ )( e ǂv v ) and determine ϱ from the e and μ momentum spectra and ξ from the correlations between e and μ momenta. For ϱ we obtain ϱτ→e = 0.79 ± 0.08 ± 0.06 and ϱτ→μ = 0.76 ± 0.08 in accordance with the V - A structure of the decays. The momentum correlations are only sensitive to the product ξτ→eξτ→μ. Setting ξτ→e = ξτ→μ, we obtain |ξτ| = 0.90 ± 0.15 ± 0.10 also in accordance with V - A. The updated decay fractions are B(τ → e v v ) = (17.5 ± 0.3 ± 0.5)% and B(τ → μv v ) = (17.4 ± 0.3 ± 0.5)% .

Published
1993

22. Inclusive production of η′ (958) andf o (975) mesons in the υ energy region

Author

V. Lubimov, Mikhail Danilov, W. Schmidt-Parzefall, Ivan Belyaev, H. Wegener, T. Podobnik, H. Albrecht, A. Kosche, J. Stiewe, R. P. Hofmann, R. Wurth, T. Oest, D. Reßing, J. Spengler, J. D. Prentice, D. Töpfer, C. Hast, C. E. K. Charlesworth, M. Seeger, T. S. Yoon, A. Lange, Werner Hofmann, D. B. MacFarlane, A. Lindner, I. Tichomirov, G. Kernel, A. Droutskoy, K. Strahl, Vladislav Balagura, T. Siegmund, H. Kapitza, R. D. Appuhn, M. Walter, G. Kostina, R. Waldi, M. Schieber, Michael Schneider, P. Eckstein, R. G. Van de Water, A. Zimmermann, Yu. Zaitsev, S. Werner, M. Bittner, S. Khan, A. Hüpper, R. Reiner, Yu. Gershtein, Manfred Paulini, P. M. Patel, I. V. Gorelov, P. Pakhlov, A. Walther, T. Kirchhoff, Fedor Ratnikov, E.R.F. Hyatt, Dave Britton, H. Schröder, K. W. Edwards, E. Križnič, Thomas Hamacher, V. Soloshenko, V. Shibaev, B. Spaan, W. Funk, A. Nau, K. T. Knöpfle, Sergey Semenov, Peter Krieger, P. R. B. Saull, K. R. Schubert, S. Chechelnitsky, Hermann Kolanoski, K. Ehret, S. Nowack, P. Križan, A. Golutvin, Holger Schulz, D. Wegener, T. Živko, R. Mundt, M. Schmidtler, H. Thurn, K. Reim, Rainer Mankel, S. Weseler, H. Ehrlichmann, and K. Tzamariudaki

Subjects
Physics, Particle physics, Argus, Annihilation, Physics and Astronomy (miscellaneous), Meson, Octet, Electron–positron annihilation, Nuclear physics, Pseudoscalar, Vector meson, Singlet state, Engineering (miscellaneous), computer, computer.programming_language
Abstract

The inclusive production cross sections of η′ (958) andf o (975) mesons are measured ine + e − annihilation in the nonresonant continuum around $$\sqrt s = 10$$ GeV and in decays of the υ resonances using the ARGUS detector. For η′ (958) mesons, a production ratio of η′ (958)/ηdir=0.35±0.24, with ηdir=η−BR(η′→ηX)·η′, is determined in direct υ(1S) decays, which can be partially explained by the pseudoscalar singlet/octet mixing. Forf o (975) production, we obtain a production ratio off o (975)/p(770)°=0.17±0.030 in direct υ(1S) decays. In its production features, thef o (975) behaves like an ordinary meson, though aK $$\bar K$$ molecule nature cannot be excluded. The substantial production yield of thef o (975) meson demonstrates the important effect of feeddown from mesons beyond the basic multiples on pseudoscalar and vector meson production.

Published
1993

23. Memory Profiling using Hardware Counters

Author

Brian J. N. Wylie, Nicolai Kosche, Christopher Aoki, and Marty Itzkowitz

Subjects
Computer science, User modeling, Spec#, Permission, computer.software_genre, Data structure, Memory profiling, Computer engineering, Operating system, Code (cryptography), Observability, Compiler, computer, computer.programming_language
Abstract

Although memory performance is often a limiting factor in application performance, most tools only show performance data relating to the instructions in the program, not to its data. In this paper, we describe a technique for directly measuring the memory profile of an application. We describe the tools and their user model, and then discuss a particular code, the MCFbenchmark from SPEC CPU 2000. We show performance data for the data structures and elements, and discuss the use of the data to improve program performance. Finally, we discuss extensions to the work to provide feedback to the compiler for prefetching and to generate additional reports from the data.

Published
2003

24. Search for rare B decays

Author

P. Pakhlov, S. Weseler, K. T. Knöpfle, Ivan Belyaev, Sergey Barsuk, W. Schmidt-Parzefall, Axel Lindner, R. Schwierz, A. Nau, Sergey Semenov, J. Spengler, H. Schröder, J. Graf, T. Siegmund, Hermann Kolanoski, H. Kuipers, D. Töpfer, I. Korolko, R. Mundt, C. Frankl, S. Werner, M. Schmidtler, D. B. MacFarlane, G. Kernel, R. Chistov, R. Waldi, H. Thurn, A. Lange, L. Gershtein, O. Mai, E. Križnič, Holger Schulz, R. P. Hofmann, P. R.B. Saull, J. Stiewe, M. Schieber, T. Kirchhoff, R. G. Van de Water, P. Krieger, M. Walter, D. Reßing, T. Živko, K. Tzamariudaki, C. Hast, Michael Schneider, Vladislav Balagura, T. S. Yoon, P. Eckstein, H. Wegener, D. O. Litvintsev, H. Kapitza, Thomas Hamacher, P. Križan, T. Podobnik, B. Spaan, K. Reim, K. Ehret, G. Kostina, H. Albrecht, R. Reiner, R. Mankel, R. Wurth, T. Oest, R. Eckmann, Yu. Zaitsev, A. Hüpper, A. Golutyin, A. Snizhko, J. D. Prentice, I. Tichomirov, Klaus R. Schubert, Mikhail Danilov, A. Kosche, Yuri Gershtein, Sebastian Nowak, D. Wegener, M. Schramm, and Werner Hofmann

Subjects
Physics, Nuclear physics, Nuclear and High Energy Physics, Particle physics, Argus, Electron–positron annihilation, B meson, DESY, computer, Storage ring, Particle Physics - Experiment, computer.programming_language
Abstract

Using the ARGUS detector at the e+e− storage ring DORIS II at DESY, we have searched for decays b → sgluon through full reconstruction of a whole event. Two B B decays were found with one of B meson decaying into a final state without charmed particles. We also obtained an upper limit of Br(B+ → τ+ντ) of 1.04% at 90% CL.

Published
1995

25. Physics with ARGUS

Author

Albrecht, Hartwig, Andam, A. A., Hasemann, H., Hupper, A., Khan, S., Knopfle, K. T., Seeger, M., Spahn, M., Spengler, J., Britton, D. I., Brown, N. N., Charlesworth, C. E. K., Edwards, K. W., Hofmann, R. P., Fernholz, R., Frisken, William R., Fukunaga, C., Gilkinson, D. J., Gingrich, D. M., Goddard, M., Hyatt, E. R. F., Kim, P. C. H., Krieger, P., Kutschke, Robert K., Kapitza, H., MacFarlane, D. B., McKenna, J. A., McLean, K. W., Orr, R. S., Padley, B. Paul, Parsons, J. A., Patel, P. M., Prentice, J. D., Saull, P. R. B., Seidel, S. C., Kirchhoff, T., Seywerd, H. C. J., Stacey, B. J., Swain, J. D., Tsipolitis, G., Tzamariudaki, K., van de Water, Richard George, Yoon, T. S., Yun, J. C., Ammar, R., Coppage, D., Kruger, A., Davis, R., Kanekal, S., Kwak, N., Ratz, C., Ressing, D., Ruf, T., Schael, S., Schneider, M., Strahl, K., Tamminga, J., Lembke-Koppitz, I., Weseler, S., Bostjancic, B., Kernel, G., Krizan, P., Kriznic, E., Plesko, M., Podobnik, T., Zivko, T., Cronstrom, H. I., Jonsson, L., Nau, A., Oku, Y., Arefev, A., Babaev, A., Balagura, V., Barsuk, S., Belyaev, I., Blinov, V., Chechelnitsky, S., Chistov, R., Danilov, M., Nilsson, A. W., Droutskoi, A., Eiges, V., Fominykh, B., Gershtein, I., Gershtein, Yu., Golutvin, A., Gorelov, I., Igonkina, O., Korolko, I., Kostina, G., Nippe, A., Litvintsev, D., Lubimov, V., Matveev, V., Murat, P., Nagovitsyn, V., Pakhlov, P., Ratnikov, F., Root, N., Rostovtsev, A., Ryltsov, V., Nowak, S., Semenov, A., Semenov, S., Semenov, Yu., Shevchenko, V., Shibaev, V., Snizhko, A., Soloshenko, V., Sopov, V., Chistilin, V., Tikhomirov, I., Binder, U., Philipp, A., Undrus, Alexander E., Zaitsev, Yu., Zhilich, V., Childers, R., Darden, C. W., Gennow, H., ARGUS Collaboration, Reidenbach, M., Schafer, M., Schroder, H., Schulz, H. D., Sefkow, F., Selonke, F., Volland, U., Walter, M., Wurth, R., Bockmann, P., Yagil, A., Appuhn, R. D., Buchner, U., Donker, J. P., Drescher, A., Graf, H. J., Grawe, B., Hast, C., Herrera, G., Kamp, D., Drews, G., Kolanoski, H., Kosche, A., Lange, Arnd, Lindner, A., Mankel, R., Markees, A., Matthiesen, U., Scheck, H., Schieber, M., Schweda, G., Ehrlichmann, H., Siegmund, T., Spaan, B., Thurn, H., Topfer, D., Walther, A., Wegener, D., Westerhoff, S., Bittner, M., Eckstein, P., Frankl, C., Funk, Wolfgang, Graf, J., Holtzhauer, R., Schmidtler, M., Schramm, M., Schubert, Klaus R., Schwierz, R., Topfer, M., Waldi, R., Paulini, M., Reim, K., Glaser, R., Wegener, H., Behnke, O., Eckmann, R., Hapke, M., Kuipers, H., Mai, O., Mundt, R., Oest, T., Reiner, R., Rohde, A., Hamacher, T., Schmidt-Parzefall, W., Weyers, P., Becker, U., Eckmann, C., Fritz, K., Heintz, F., Heller, R., Klinger, T., Salomon, R., Schwingenheuer, B., Harder, G., Stiewe, J., Utzat, P., Werner, S., Ball, S., Ehret, K., Gabriel, J. C., Geyer, C., Hofmann, W., Holscher, A., and Holzer, B.

Subjects
electroproduction: B, upsilon mesons [mass], two-photon [exchange], annihilation: electron positron, electroproduction: tau, ARGUS, Electron–positron annihilation, Hadron, electroproduction [vector meson], General Physics and Astronomy, tau [hadronic decay], annihilation [electron positron], leptonic decay [tau], experimental results [review], D [decay modes], decay modes [Lambda/c+], width [upsilon mesons], upsilon mesons: width, electroproduction [tau], gluon: jet, approx. 10 GeV-cms, decay modes: Lambda/c+, electron positron [colliding beams], Nuclear Experiment, computer.programming_language, Physics, Argus, photon photon [interaction], Cabibbo–Kobayashi–Maskawa matrix, leptonic decay: tau, mass: upsilon mesons, B0 anti-B0: mixing, Michel parameter, electron positron: colliding beams, review: experimental results, electroproduction: vector meson, decay modes [B], hadron spectroscopy [charmed particle], tau [electroproduction], fragmentation [quark], D: decay modes, interaction: photon photon, mass [upsilon mesons], B: decay modes, colliding beams [electron positron], two-photon: exchange, quark: fragmentation, Particle physics, Meson, DESY DORIS Stor, jet [electroproduction], electron positron: annihilation, vector meson: electroproduction, electroproduction [B], interaction [photon photon], photon photon: interaction, Nuclear physics, jet: electroproduction, upsilon mesons: mass, charmed particle: hadron spectroscopy, jet [gluon], B: electroproduction, ddc:530, vector meson [electroproduction], Particle Physics, tau: hadronic decay, Lambda/c+ [decay modes], hadronic decay: tau, lepton: universality, electroproduction [jet], exchange: two-photon, electron positron [annihilation], universality [lepton], Lambda/c+: decay modes, B [decay modes], High Energy Physics::Phenomenology, decay modes [D], Elementary particle physics, electroproduction: jet, B [electroproduction], colliding beams: electron positron, tau: electroproduction, tau: leptonic decay, decay modes: B, High Energy Physics::Experiment, mixing [B0 anti-B0], hadronic decay [tau], computer, tau [leptonic decay], decay modes: D, exchange [two-photon], Lepton
Abstract

Physics reports 276(5-6), 224 - 405 (1996). doi:10.1016/S0370-1573(96)00008-7, The impact of the ARGUS experiment to elementary particle physics is reviewed. More than ten years of data taking has allowed ARGUS to contribute significantly to our understanding of beauty and charmed hadrons, τ Leptons, ϒ mesons, ϒϒ interactions and fragmentation processes. In particular the ARGUS measurements of CKM matrix elements opened up a new window on the Standard Model., Published by Elsevier Science, North-Holland, Amsterdam [u.a.]

Catalog

Books, media, physical & digital resources
See catalog results