Evidence for Λc(2593)+ production

Autor: 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, R. Reiner

Publikováno v: Physics Letters B. 402:207-212

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 t

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::3bef3920818bb98f4add78c991b3b739
https://doi.org/10.1016/s0370-2693(97)00503-0

Two-photon production of ω pairs

Autor: 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, A. Golutvin

Publikováno v: Physics Letters B. 374:265-270

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.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b8974c283eccb13ef26e42e7ee9b618b
https://doi.org/10.1016/0370-2693(96)00174-8

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)

Autor: 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, D. B. MacFarlane

Publikováno v: Zeitschrift für Physik C Particles and Fields. 65:619-625

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:

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6aa7a70c89c705140e1fa2297e0d1d35
https://doi.org/10.1007/bf01578670

Measurement of the decay fractions ofD * mesons

Autor: 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, Vladislav Balagura

Publikováno v: Zeitschrift für Physik C Particles and Fields. 66:63-70

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)

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f0bf00f17d7f3d62b3765382fdf8f55a
https://doi.org/10.1007/bf01496580

The first measurement of the Michel parameter η in τ decays

Autor: 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, R. Wurth

Publikováno v: Physics Letters B. 341:441-447

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

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d5beca357296f38b135b57fcdcab6047
https://doi.org/10.1016/0370-2693(95)80027-u