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156 results on '"Scobel W"'

1. Exclusive measurement of two-pion production in the [formula omitted] reaction

Author

Keleta, S., Bargholtz, Chr., Bashkanov, M., Berłowski, M., Bogoslawsky, D., Calén, H., Clement, H., Demirörs, L., Ekström, C., Fransson, K., Gerén, L., Gustafsson, L., Höistad, B., Ivanov, G., Jacewicz, M., Jiganov, E., Johansson, T., Khakimova, O., Kren, F., Kullander, S., Kupść, A., Kuzmin, A., Lindberg, K., Marciniewski, P., Morosov, B., Oelert, W., Pauly, C., Petrén, H., Petukhov, Y., Povtorejko, A., Pricking, A., Ruber, R.J.M.Y., Schönning, K., Scobel, W., Shafigullin, R., Shwartz, B., Skorodko, T., Sopov, V., Stepaniak, J., Tegnér, P.-E., Engblom, P. Thörngren, Tikhomirov, V., Turowiecki, A., Wagner, G.J., Wilkin, C., Wolke, M., Zabierowski, J., Zartova, I., and Złomańczuk, J.

Published
2009
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2. Exclusive measurement of the pp → nnπ+π+ reaction at 1.1 GeV

Author

Skorodko, T., Bashkanov, M., Bogoslawsky, D., Calén, H., Clement, H., Doroshkevich, E., Demiroers, L., Ekström, C., Fransson, K., Gustafsson, L., Höistad, B., Ivanov, G., Jacewicz, M., Jiganov, E., Johansson, T., Khakimova, O., Keleta, S., Koch, I., Kren, F., Kullander, S., Kupść, A., Marciniewski, P., Meier, R., Morosov, B., Pauly, C., Petrén, H., Petukhov, Y., Povtorejko, A., Ruber, R. J. M. Y., Schönning, K., Scobel, W., Shwartz, B., Stepaniak, J., Thörngren-Engblom, P., Tikhomirov, V., Wagner, G. J., Wolke, M., Yamamoto, A., Zabierowski, J., Zlomanczuk, J., and The CELSIUS/WASA Collaboration

Published
2011
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3. The WASA detector facility at CELSIUS

Author

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

Published
2008
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4. Production of $ \rightarrow$ 3HeX reaction at 1360 and 1450 MeV

Author

Schönning, K., Bargholtz, Chr., Bashkanov, M., Berlowski, M., Bogoslawsky, D., Calén, H., Clement, H., Demirörs, L., Ekström, C., Fransson, K., Gerén, L., Gustafsson, L., Höistad, B., Ivanov, G., Jacewicz, M., Jiganov, E., Johansson, T., Keleta, S., Khakimova, O., Kren, F., Kullander, S., Kupsc, A., Kuzmin, A., Lindberg, K., Marciniewski, P., Morosov, B., Oelert, W., Pauly, C., Petrén, H., Petukhov, Y., Povtorejko, A., Scobel, W., Shafigullin, R., Shwartz, B., Skorodko, T., Sopov, V., Stepaniak, J., Tegnér, P. -E., Thörngren Engblom, P., Tikhomirov, V., Turowiecki, A., Wagner, G. J., Wolke, M., Zabierowski, J., Zartova, I., and Złomanczuk, J.

Published
2010
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5. Upper limits on resonance contributions to proton-proton elastic scattering in the c.m. mass range 2.05-2.85 GeV/ c2

Author

Rohdjeß, H., Altmeier, M., Bauer, F., Bisplinghoff, J., Bollmann, R., Büßer, K., Busch, M., Diehl, O., Dohrmann, F., Engelhardt, H. P., Ernst, J., Eversheim, P. D., Eyser, K. O., Felden, O., Gebel, R., Groß, A., Groß-Hardt, R., Hinterberger, F., Langkau, R., Lindlein, J., Maier, R., Mosel, F., Prasuhn, D., von Rossen, P., Scheid, N., Schulz-Rojahn, M., Schwandt, F., Schwarz, V., Scobel, W., Trelle, H. -J., Ulbrich, K., Weise, E., Wellinghausen, A., Woller, K., and Ziegler, R.

Published
2006
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6. Excitation functions of the analyzing power in elastic proton-proton scattering from 0.45 to 2.5 GeV

Author

Altmeier, M., Bauer, F., Bisplinghoff, J., Büßer, K., Busch, M., Colberg, T., Demirörs, L., Engelhardt, H. P., Eversheim, P. D., Eyser, K. O., Felden, O., Gebel, R., Glende, M., Greiff, J., Hinterberger, F., Jonas, E., Krause, H., Lindemann, T., Lindlein, J., Lorentz, B., Maier, R., Maschuw, R., Meinerzhagen, A., Prasuhn, D., Rohdjeß, H., Rosendaal, D., von Rossen, P., Schirm, N., Schwarz, V., Scobel, W., Trelle, H. -J., Ulbrich, K., Weise, E., Wellinghausen, A., and Ziegler, R.

Published
2005
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8. Cross-sections and spin observables in proton-proton elastic scattering: Results from EDDA at COSY

Author

Rohdjeß, H., Bauer, F., Bisplinghoff, J., Büßer, K., Busch, M., Colberg, T., Demirörs, L., Dahl, C., Eversheim, P. D., Eyser, O., Felden, O., Gebel, R., Greiff, J., Hinterberger, F., Jonas, E., Krause, H., Lehmann, C., Lindlein, J., Maier, R., Meinerzhagen, A., Pauly, C., Prasuhn, D., Rosendaal, D., von Rossen, P., Schirm, N., Scobel, W., Ulbrich, K., Weise, E., Wolf, T., and Ziegler, R.

Published
2003
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9. Study of baryon and search for dibaryon resonances by the $pp \rightarrow pp\pi^ + \pi^-$ reaction

Author

Doroshkevich, E., Bashkanov, M., Brodowski, W., Bilger, R., Calén, H., Clement, H., Ekström, C., Fransson, K., Greiff, J., Häggström, S., Höistad, B., Johanson, J., Johansson, A., Johansson, T., Kilian, K., Kullander, S., Kupsc, A., Marciniewski, P., Meier, R., Morosov, B., Oelert, W., Pätzold, J., Ruber, R. J. M. Y., Scobel, W., Stepaniak, J., Sukhanov, A., Turowiecki, A., Wagner, G. J., Wilhelmi, Z., Zabierowski, J., and Zlomanczuk, J.

Published
2003
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10. Determining beam parameters in a storage ring with a cylindrical hodoscope using elastic proton–proton scattering

Author

Rohdjeß, H., Albers, D., Bisplinghoff, J., Bollmann, R., Büßer, K., Diehl, O., Dohrmann, F., Engelhardt, H.-P., Eversheim, P.D., Gasthuber, M., Greiff, J., Groß, A., Groß-Hardt, R., Hinterberger, F., Igelbrink, M., Langkau, R., Maier, R., Mosel, F., Müller, M., Münstermann, M., Prasuhn, D., von Rossen, P., Scheid, H., Schirm, N., Schwandt, F., Scobel, W., Trelle, H.J., Wellinghausen, A., Wiedmann, W., Woller, K., and Ziegler, R.

Published
2006
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11. Radiation damage of polypropylene fiber targets in storage rings

Author

Rohdjeß, H., Albers, D., Bisplinghoff, J., Bollmann, R., Büßer, K., Diehl, O., Dohrmann, F., Engelhardt, H.-P., Eversheim, P.D., Greiff, J., Groß, A., Groß-Hardt, R., Hinterberger, F., Igelbrink, M., Langkau, R., Maier, R., Mosel, F., Müller, M., Münstermann, M., Prasuhn, D., von Rossen, P., Scheid, H., Schirm, N., Schwandt, F., Scobel, W., Trelle, H.J., Wellinghausen, A., Wiedmann, W., Woller, K., and Ziegler, R.

Published
2006
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12. Excitation of the Roper resonance in single- and double-pion production in nucleon-nucleon collisions⋆

Author

Skorodko, T., Bashkanov, M., Bogoslawsky, D., Calen, H., Cappellaro, F., Clement, H., Demiroers, L., Doroshkevich, E., Duniec, D., Ekström, C., Franssen, K., Gustafsson, L., Höistad, B., Ivanov, G., Jacewicz, M., Jiganov, E., Johansson, T., Khakimova, O., Kaskulov, M., Keleta, S., Koch, I., Kren, F., Kullander, S., Kupść, A., Kuznetsov, A., Marciniewski, P., Meier, R., Morosov, B., Pauly, C., Petterson, H., Petukhov, Y., Povtorejko, A., Schönning, K., Scobel, W., Shwartz, B., Sopov, V., Stepeniak, J., Thörngren-Engblom, P., Tikhomirov, V., Wagner, G. J., Wolke, M., Yamamoto, A., Zabierowski, J., Złomanczuk, J., and The CELSIUS-WASA Collaboration

Published
2008
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14. Energy flow and charged particle spectra in deep inelastic scattering at HERA

Author

Abt, I., Ahmed, T., Andreev, V., Aid, S., Andrieu, B., Appuhn, R. -D., Arpagaus, M., Babaev, A., Bärwolff, H., Bán, J., Baranov, P., Barrelet, E., Bartel, W., Bassler, U., Beck, H. P., Behrend, H. -J., Belousov, A., Berger, Ch., Bergstein, H., Bernardi, G., Bernet, R., Bertrand-Coremans, G., Besançon, M., Biddulph, P., Binder, E., Bizot, J. C., Blobel, V., Borras, K., Bosetti, P. C., Boudry, V., Bourdarios, C., Braemer, A., Brasse, F., Braun, U., Braunschweig, W., Brisson, V., Bruncko, D., Büngener, L., Bürger, J., Büsser, F. W., Buniatian, A., Burke, S., Buschhorn, G., Campbell, A. J., Carli, T., Charles, F., Chyla, J., Clarke, D., Clegg, A. B., Colombo, M., Coughlan, J. A., Courau, A., Coutures, Ch., Cozzika, G., Criegee, L., Cvach, J., Dagoret, S., Dainton, J. B., Danilov, M., Dann, A. W. E., Dau, W. D., David, M., Deffur, E., Delcourt, B., Del Buono, L., Devel, M., De Roeck, A., Di Nezza, P., Dingus, P., Dollfus, C., Dowell, J. D., Dreis, H. B., Drescher, A., Duboc, J., Düllmann, D., Dünger, O., Duhm, H., Ebbinghaus, R., Eberle, M., Ebert, J., Ebert, T. R., Eckerlin, G., Efremenko, V., Egli, S., Ehrlichmann, H., Eichenberger, S., Eichler, R., Eisele, F., Eisenhandler, E., Ellis, N. N., Ellison, R. J., Elsen, E., Erdmann, M., Evrard, E., Favart, L., Fedotov, A., Feeken, D., Felst, R., Feltesse, J., Fensome, I. F., Ferencei, J., Ferrarotto, F., Flamm, K., Flauger, W., Fleischer, M., Flieser, M., Flügge, G., Fomenko, A., Fominykh, B., Forbush, M., Formánek, J., Foster, J. M., Franke, G., Fretwurst, E., Fuhrmann, P., Gabathuler, E., Gamerdinger, K., Garvey, J., Gayler, J., Gebauer, M., Gellrich, A., Gennis, M., Genzel, H., Gerhards, R., Godfrey, L., Goerlach, U., Goerlich, L., Gogitidze, N., Goldberg, M., Goldner, D., Goodall, A. M., Gorelov, I., Goritchev, P., Grab, C., Grässler, H., Grässler, R., Greenshaw, T., Greif, H., Grindhammer, G., Gruber, A., Gruber, C., Haack, J., Haidt, D., Hajduk, L., Hamon, O., Hampel, M., Hanlon, E. M., Hapke, M., Harjes, J., Haydar, R., Haynes, W. J., Heatherington, J., Hedberg, V., Heinzelmann, G., Henderson, R. C. W., Henschel, H., Herma, R., Herynek, I., Hildesheim, W., Hill, P., Hilton, C. D., Hladký, J., Hoeger, K. C., Höppner, M., Huet, Ph., Hufnagel, H., Huot, N., Ibbotson, M., Itterbeck, H., Jabiol, M. -A., Jacholkowska, A., Jacobsson, C., Jaffre, M., Jansen, T., Jönsson, L., Johannsen, K., Johnson, D. P., Johnson, L., Jung, H., Kalmus, P. I. P., Kant, D., Kazarian, S., Kaschowitz, R., Kasselmann, P., Kathage, U., Kaufmann, H. H., Kenyon, I. R., Kermiche, S., Keuker, C., Kiesling, C., Klein, M., Kleinwort, C., Knies, G., Ko, W., Köhler, T., Kolanoski, H., Kole, F., Kolya, S. D., Korbel, V., Korn, M., Kostka, P., Kotelnikov, S. K., Krasny, M. W., Krücker, D., Krüger, U., Kubenka, J. P., Küster, H., Kuhlen, M., Kurča, T., Kurzhöfer, J., Kuznik, B., Lacour, D., Lamarche, F., Lander, R., Landon, M. P. J., Lange, W., Langkau, R., Lanius, P., Laporte, J. F., Lebedev, A., Leuschner, A., Leverenz, C., Levonian, S., Lewin, D., Ley, Ch., Lindner, A., Lindström, G., Linsel, F., Lipinski, J., Loch, P., Lohmander, H., Lopez, G. C., Lüers, D., Lüke, D., Magnussen, N., Malinovski, E., Mani, S., Marage, P., Marks, J., Marshall, R., Martens, J., Martin, R., Martyn, H. -U., Martyniak, J., Masson, S., Mavroidis, A., Maxfield, S. J., McMahon, S. J., Mehta, A., Meier, K., Mercer, D., Merz, T., Meyer, C. A., Meyer, H., Meyer, J., Mikocki, S., Monnier, E., Moreau, F., Moreels, J., Morris, J. V., Müller, K., Murín, P., Murray, S. A., Nagovizin, V., Naroska, B., Naumann, Th., Newman, P. R., Newton, D., Neyret, D., Nguyen, H. K., Niebergall, F., Niebuhr, C., Nisius, R., Nowak, G., Noyes, G. W., Nyberg, M., Oberlack, H., Obrock, U., Olsson, J. E., Orenstein, S., Ould-Saada, F., Pascaud, C., Patel, G. D., Peppel, E., Peters, S., Phillips, H. T., Phillips, J. P., Pichler, Ch., Pilgram, W., Pitzl, D., Prell, S., Prosi, R., Rädel, G., Raupach, F., Rauschnabel, K., Reimer, P., Reinshagen, S., Ribarics, P., Riech, V., Riedlberger, J., Riess, S., Rietz, M., Robertson, S. M., Robmann, P., Roosen, R., Rosenbauer, K., Rostovtsev, A., Royon, C., Rudowicz, M., Ruffer, M., Rusakov, S., Rybicki, K., Sahlmann, N., Sanchez, E., Sankey, D. P. C., Savitsky, M., Schacht, P., Schleper, P., von Schlippe, W., Schmidt, C., Schmidt, D., Schmitz, W., Schöning, A., Schröder, V., Schuhmann, E., Schulz, M., Schwab, B., Schwind, A., Scobel, W., Seehausen, U., Sell, R., Semenov, A., Shekelyan, V., Sheviakov, I., Shooshtari, H., Shtarkov, L. N., Siegmon, G., Siewert, U., Sirois, Y., Skillicorn, I. O., Smirnov, P., Smith, J. R., Soloviev, Y., Spitzer, H., Steenbock, M., Steffen, P., Steinberg, R., Stella, B., Stephens, K., Stier, J., Stösslein, U., Strachota, J., Straumann, U., Struczinski, W., Sutton, J. P., Taylor, R. E., Tchernyshov, V., Thiebaux, C., Thompson, G., Tichomirov, I., Truöl, P., Turnau, J., Tutas, J., Urban, L., Usik, A., Valkar, S., Valkarova, A., Vallée, C., Van Esch, P., Vartapetian, A., Vazdik, Y., Vecko, M., Verrecchia, P., Vick, R., Villet, G., Vogel, E., Wacker, K., Walker, I. W., Walther, A., Weber, G., Wegener, D., Wegener, A., Wellisch, H. P., West, L. R., Willard, S., Winde, M., Winter, G. -G., Wolff, Th., Womersley, L. A., Wright, A. E., Wulff, N., Yiou, T. P., Žáček, J., Zeitnitz, C., Ziaeepour, H., Zimmer, M., Zimmermann, W., Zomer, F., and H1 Collaboration

Published
1994
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15. A measurement of multi-jet rates in deep-inelastic scattering at HERA

Author

Abt, I., Ahmed, T., Andreev, V., Andrieu, B., Appuhn, R. -D., Arpagaus, M., Babaev, A., Bärwolff, H., Bán, J., Baranov, P., Barrelet, E., Bartel, W., Bassler, U., Beck, H. P., Behrend, H. -J., Belousov, A., Berger, Ch., Bergstein, H., Bernardi, G., Bernet, R., Bertrand-Coremans, G., Besançon, M., Biddulph, P., Binder, E., Bischoff, A., Bizot, J. C., Blobel, V., Borras, K., Bosetti, P. C., Boudry, V., Bourdarios, C., Brasse, F., Braun, U., Braunschweig, W., Brisson, V., Bruncko, D., Büngener, L., Bürger, J., Büsser, F. W., Buniatian, A., Burke, S., Buschhorn, G., Campbell, A. J., Carli, T., Charles, F., Clarke, D., Clegg, A. B., Colombo, M., Coughlan, J. A., Courau, A., Coutures, Ch., Cozzika, G., Criegee, L., Cvach, J., Dagoret, S., Dainton, J. B., Danilov, M., Dann, A. W. E., Dau, W. D., David, M., Deffur, E., Delcourt, B., Del Buono, L., Devel, M., De Roeck, A., Dingus, P., Dollfus, C., Dowell, J. D., Dreis, H. B., Drescher, A., Duboc, J., Düllmann, D., Dünger, O., Duhm, H., Ebbinghaus, R., Eberle, M., Ebert, J., Ebert, T. R., Eckerlin, G., Efremenko, V., Egli, S., Eichenberger, S., Eichler, R., Eisele, F., Eisenhandler, E., Ellis, N. N., Ellison, R. J., Elsen, E., Erdmann, M., Evrard, E., Favart, L., Fedotov, A., Feeken, D., Felst, R., Feltesse, J., Fensome, I. F., Ferencei, J., Ferrarotto, F., Flamm, K., Flauger, W., Fleischer, M., Flieser, M., Flügge, G., Fomenko, A., Fominykh, B., Forbush, M., Formánek, J., Foster, J. M., Franke, G., Fretwurst, E., Fuhrmann, P., Gabathuler, E., Gamerdinger, K., Garvey, J., Gayler, J., Gellrich, A., Gennis, M., Genzel, H., Gerhards, R., Godfrey, L., Goerlach, U., Goerlich, L., Gogitidze, N., Goldberg, M., Goodall, A. M., Gorelov, I., Goritchev, P., Grab, C., Grässler, H., Grässler, R., Greenshaw, T., Greif, H., Grindhammer, G., Gruber, C., Haack, J., Haidt, D., Hajduk, L., Hamon, O., Handschuh, D., Hanlon, E. M., Hapke, M., Harjes, J., Haydar, R., Haynes, W. J., Heatherington, J., Hedberg, V., Heinzelmann, G., Henderson, R. C. W., Henschel, H., Herma, R., Herynek, I., Hildesheim, W., Hill, P., Hilton, C. D., Hladký, J., Hoeger, K. C., Huet, Ph., Hufnagel, H., Huot, N., Ibbotson, M., Itterbeck, H., Jabiol, M. -A., Jacholkowska, A., Jacobsson, C., Jaffre, M., Jansen, T., Jönsson, L., Johannsen, K., Johnson, D. P., Johnson, L., Jung, H., Kalmus, P. I. P., Kasarian, S., Kaschowitz, R., Kasselmann, P., Kathage, U., Kaufmann, H. H., Kenyon, I. R., Kermiche, S., Keuker, C., Kiesling, C., Klein, M., Kleinwort, C., Knies, G., Ko, W., Köhler, T., Kolanoski, H., Kole, F., Kolya, S. D., Korbel, V., Korn, M., Kostka, P., Kotelnikov, S. K., Krasny, M. W., Krehbiel, H., Krücker, D., Krüger, U., Kubenka, J. P., Küster, H., Kuhlen, M., Kurča, T., Kurzhöfer, J., Kuznik, B., Lacour, D., Lamarche, F., Lander, R., Landon, M. P. J., Lange, W., Langkau, R., Lanius, P., Laporte, J. F., Lebedev, A., Leuschner, A., Leverenz, C., Levonian, S., Lewin, D., Ley, Ch., Lindner, A., Lindström, G., Linsel, F., Lipinski, J., Loch, P., Lohmander, H., Lopez, G. C., Lüers, D., Magnussen, N., Malinovski, E., Mani, S., Marage, P., Marks, J., Marshall, R., Martens, J., Martin, R., Martyn, H. -U., Martyniak, J., Masson, S., Mavroidis, A., Maxfield, S. J., McMahon, S. J., Mehta, A., Meier, K., Mercer, D., Merz, T., Meyer, C. A., Meyer, H., Meyer, J., Mikocki, S., Milone, V., Monnier, E., Moreau, F., Moreels, J., Morris, J. V., Müller, K., Murín, P., Murray, S. A., Nagovizin, V., Naroska, B., Naumann, Th., Newman, P. R., Newton, D., Neyret, D., Nguyen, H. K., Niebergall, F., Niebuhr, C., Nisius, R., Nowak, G., Noyes, G. W., Nyberg, M., Oberlack, H., Obrock, U., Olsson, J. E., Orenstein, S., Ould-Saada, F., Pascaud, C., Patel, G. D., Peppel, E., Peters, S., Phillips, H. T., Phillips, J. P., Pichler, Ch., Pilgram, W., Pitzl, D., Prell, S., Prosi, R., Rädel, G., Raupach, F., Rauschnabel, K., Reimer, P., Reinshagen, S., Ribarics, P., Riech, V., Riedlberger, J., Riess, S., Rietz, M., Robertson, S. M., Robmann, P., Roosen, R., Rostovtsev, A., Royon, C., Rudowicz, M., Ruffer, M., Rusakov, S., Rybicki, K., Sahlmann, N., Sanchez, E., Sankey, D. P. C., Savitsky, M., Schacht, P., Schleper, P., von Schlippe, W., Schmidt, C., Schmidt, D., Schmitz, W., Schöning, A., Schröder, V., Schulz, M., Schwab, B., Schwind, A., Scobel, W., Seehausen, U., Sell, R., Semenov, A., Shekelyan, V., Sheviakov, I., Shooshtari, H., Shtarkov, L. N., Siegmon, G., Siewert, U., Sirois, Y., Skillicorn, I. O., Smirnov, P., Smith, J. R., Smolik, L., Soloviev, Y., Spitzer, H., Staroba, P., Steenbock, M., Steffen, P., Steinberg, R., Stella, B., Stephens, K., Stier, J., Stösslein, U., Strachota, J., Straumann, U., Struczinski, W., Sutton, J. P., Taylor, R. E., Tchernyshov, V., Thiebaux, C., Thompson, G., Tichomirov, I., Truöl, P., Turnau, J., Tutas, J., Urban, L., Usik, A., Valkar, S., Valkarova, A., Vallée, C., Van Esch, P., Vartapetian, A., Vazdik, Y., Vecko, M., Verrecchia, P., Vick, R., Villet, G., Vogel, E., Wacker, K., Walker, I. W., Walther, A., Weber, G., Wegener, D., Wegner, A., Wellisch, H. P., West, L. R., Willard, S., Winde, M., Winter, G. -G., Wolff, Th., Womersley, L. A., Wright, A. E., Wulff, N., Yiou, T. P., Žáček, J., Závada, P., Zeitnitz, C., Ziaeepour, H., Zimmer, M., Zimmermann, W., Zomer, F., and H1 Collaboration

Published
1994
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18. First results from the CELSIUS/WASA facility

Author

Kullander, S., Bargholz, C., Bashkanov, M., Bogoslawsky, D., Calén, H., Cappellaro, F., Clement, H., Demiroers, L., Dorochkevitch, E., Ekström, C., Fransson, K., Fridén, C.J., Gornov, M., Greiff, J., Gustafsson, L., Höistad, B., Ivanov, G., Jacewicz, M., Jiganov, E., Johansson, A., Johansson, T., Keletea, S., Kimura, N., Koch, I., Kipsc, A., Kuznetsov, A., Lindberg, K., Marciniewski, P., Morosov, B., Nawrot, A., Nefkens, B., Oelert, W., Pauly, C., Petukhov, Y., Povtorejko, A., Reistad, D., Ruber, R., Sandukovsky, S., Scobel, W., Shafigulin, R., Shwartz, B., Skorodko, T., Sopov, V., Stepaniak, J., Tchernyshev, V., Tegner, P.-E., Tikhomirov, V., Thörngren Engblom, P., Turowiecki, A., Wagner, G., Wiedner, U., Wilhelmi, Z., Yamamoto, A., Yamaoka, H., Zabierowski, J., and Zlomanczuk, J.

Published
2003
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19. A hadron–nucleus collision event generator for simulations at intermediate energies

Author

Ackerstaff, K., Bisplinghoff, J., Bollmann, R., Cloth, P., Diehl, O., Dohrmann, F., Drüke, V., Eisenhardt, S., Engelhardt, H.P., Ernst, J., Eversheim, P.D., Filges, D., Fritz, S., Gasthuber, M., Gebel, R., Greiff, J., Gross, A., Gross-Hardt, R., Hinterberger, F., Jahn, R., Lahr, U., Langkau, R., Lippert, G., Maschuw, R., Mayer-Kuckuk, T., Mertler, G., Metsch, B., Mosel, F., Paetz gen. Schieck, H., Petry, H.R., Prasuhn, D., von Przewoski, B., Rohdjeß, H., Rosendaal, D., Roß, U., von Rossen, P., Scheid, H., Schirm, N., Schulz-Rojahn, M., Schwandt, F., Scobel, W., Sterzenbach, G., Theis, D., Weber, J., Wellinghausen, A., Wiedmann, W., Woller, K., and Ziegler, R.

Published
2002
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29. Exclusive Measurements of pp to dpi+pi0: Double-Pionic Fusion without ABC Effect

Author

Kren, F., Bashkanov, M., Bogoslawsky, D., Calen, H., Clement, H., Demiroers, L., Ekstrom, C., Fransson, k., Greiff, J., Gustafsson, L., Hoistad, B., Ivanov, G., Jacewicz, M., Jiganov, E., Kohansson, T., Khakimova, O., Keleta, S., Koch, I., Kullander, S., Kupsc, A., Marciniewski, P., Meier, R., Morosov, B., Pauly, C., Petren, H., Petukhov, Y., Povtoreijko, A., Ruber, R. J. M. Y., Schonning, K., Scobel, W., Skorodko, T., Shwartz, B., Stepaniak, J., Thorngren-Engblom, P., Tikhomirov, V., Wagner, G. J., Wolke, M., Yamamoto, A., Zabierowski, J., and Zlomanczuk, J.

Subjects
exclusive reaction [p p], fusion, Dalitz plot, isovector, four-pi-detector, energy dependence [channel cross section], +deuteron+pi%2B+pi0%22">p p --> deuteron pi+ pi0, Delta(1232), Uppsala CELSIUS Stor, mass spectrum, pair production [pi], High Energy Physics::Experiment, ddc:530, Nuclear Experiment
Abstract

Exclusive measurements of the reaction pp -> dpi+pi0 have been carried out at T_p = 1.1 GeV at the CELSIUS storage ring using the WASA detector. The isovector pi+pi0 channel exhibits no enhancement at low invariant pipi masses, i. e. no ABC effect. The differential distributions are in agreement with the conventional t-channel Delta-Delta excitation process, which also accounts for the observed energy dependence of the total cross section. This is an update of a previously published version -- see important note at the end of the article.

Published
2011

30. ΔΔ excitation in proton–proton induced ${\pi }^{0}{\pi }^{0}$ production

Author

Skorodko, T., Bashkanov, M., Höistad, B., Ivanov, G., Jacewicz, M., Jiganov, E., Johansson, T., Khakimova, O., Keleta, S., Koch, I., Kren, F., Kullander, S., Bogoslawsky, D., Kupść, A., Marciniewski, P., Meier, R., Morosov, B., Pauly, C., Petrén, H., Petukhov, Y., Povtorejko, A., Ruber, R. J. M. Y., Schönning, K., Calén, H., Scobel, W., Shwartz, B., Stepaniak, J., Thörngren-Engblom, P., Tikhomirov, V., Wagner, G. J., Wolke, M., Yamamoto, A., Zabierowski, J., Zlomanczuk, J., Clement, H., Doroshkevich, E., Demiroers, L., Ekström, C., Fransson, K., and Gustafsson, L.

Subjects
ddc:530
Published
2011

31. Exclusive Measurement of the $pp \to nn\pi^+\pi^+$ Reaction at 1.1 GeV

Author

Bashkanov, M., Bogoslawsky, D., Calen, H., Clement, H., Doroshkevich, E., Demiroers, L., Ekstrom, C., Fransson, K., Gustafsson, L., Hoistad, B., Ivanov, G., Jacewicz, M., Jiganov, E., Johansson, T., Khakimova, O., Keleta, S., Koch, I., Kren, F., Kullander, S., Kupsc, A., Marciniewski, P., Meier, R., Morosov, B., Pauly, C., Petren, H., Petukhov, Y., Povtorejko, A., Ruber, R. J. M. Y., Schonning, K., Scobel, W., Shwartz, B., Stepaniak, J., Thorngren-Engblom, P., Tikhomirov, V., Wagner, G. J., Wolke, M., Yamamoto, A., Zabierowski, J., and Zlomanczuk, J.

Subjects
Nuclear Theory, Nuclear Experiment
Abstract

First exclusive data for the $pp \to nn\pi^+\pi^+$ reaction have been obtained at CELSIUS with the WASA detector setup at a beam energy of $T_p$ = 1.1 GeV. Total and differential cross sections disagree with theoretical calculations, which predict the $\Delta\Delta$ excitation to be the dominant process at this beam energy. Instead the data require the excitation of a higher-lying $\Delta$ state, most likely the $\Delta(1600)$, to be the leading process.

Published
2010

32. Production of eta and 3pi mesons in the pd->3HeX reaction at 1360 and 1450 MeV

Author

Schoenning, K., Bargholtz, Chr., Bashkanov, M., Berlowski, M., Bogoslawsky, D., Calen, H., Clement, H., Demiroers, L., Ekstroem, C., Fransson, K., Geren, L., Gustafsson, L., Hoeistad, B., Ivanov, G., Jacewicz, M., Jiganov, E., Johansson, T., Keleta, S., Khakimova, O., Kren, F., Kullander, S., Kupsc, A., Kuzmin, A., Lindberg, K., Marciniewski, P., Morosov, B., Oelert, W., Pauly, C., Petren, H., Petukhov, Y., Povtorejko, A., Scobel, W., Shafigullin, R., Shwartz, B., Skorodko, T., Sopov, V., Stepaniak, J., tegner, P. -E., Engblom, P. Thoerngren, Tikhomirov, V., Turowiecki, A., Wagner, G. J., Wolke, M., Zabierowski, J., Zartova, I., and Zlomanczuk, J.

Subjects
Nuclear Experiment
Abstract

The cross sections of the pd -> 3He eta, pd -> 3He pi0 pi0 pi0 and pd -> 3He pi+ pi- pi0 reactions have been measured at beam kinetic energies T_p= 1360 MeV and T_p= 1450 MeV using the CELSIUS/WASA detector setup. At both energies, the differential cross section dsigma/dOmega of the eta meson in the pd -> 3He eta reaction shows a strong forward-backward asymmetry in the CMS. The ratio between the pd -> 3He pi+ pi- pi0 and the pd -> 3He pi0 pi0 pi0 cross sections has been analysed in terms of isospin amplitudes. The reconstructed invariant mass distributions of the pi-pi, 3He-pi and 3He-2pi systems provide hints on the role of nucleon resonances in the 3pi production process., Comment: Shorter version accepted to EPJA 10 pages 14 figures

Published
2010

33. Exclusive measurements of $pp\to d{\pi }^{+}{\pi }^{0}$: Double-pionic fusion without ABC effect

Author

Kren, F., Bashkanov, M., Höistad, B., Ivanov, G., Jacewicz, M., Jiganov, E., Johansson, T., Khakimova, O., Keleta, S., Koch, I., Kullander, S., Kupść, A., Bogoslawsky, D., Marciniewski, P., Meier, R., Morosov, B., Pauly, C., Petrén, H., Petukhov, Y., Povtorejko, A., Ruber, R. J. M. Y., Schönning, K., Scobel, W., Calén, H., Skorodko, T., Shwartz, B., Stepaniak, J., Thörngren-Engblom, P., Tikhomirov, V., Wagner, G. J., Wolke, M., Yamamoto, A., Zabierowski, J., Zlomanczuk, J., Clement, H., Demiroers, L., Ekström, C., Fransson, K., Greiff, J., and Gustafsson, L.

Subjects
ddc:530
Abstract

Exclusive measurements of the reaction pp→dπ+π0pp→dπ+π0 have been carried out at Tp=1.1 GeVTp=1.1 GeV at the CELSIUS storage ring using the WASA detector. The isovector π+π0π+π0 channel exhibits no enhancement at low invariant ππ masses, i.e. no ABC effect. Therefore this most basic isovector double-pionic fusion reaction qualifies as an ideal test case for the conventional t-channel ΔΔ excitation process. Indeed, the obtained differential distributions reveal the conventional t-channel ΔΔ mechanism as the appropriate reaction process, which also accounts for the observed energy dependence of the total cross section.

Published
2010

34. The pd --> ^3He eta pi0 reaction at T_p = 1450 MeV

Author

Schoenning, K., Bargholtz, Chr., Bashkanov, M., Berlowski, M., Bogoslawsky, D., Calen, H., Clement, H., Demiroers, L., Ekstroem, C., Fransson, K., Geren, L., Gustafsson, L., Hoeistad, B., Ivanov, G., Jacewicz, M., Jiganov, E., Johansson, T., Keleta, S., Khakimova, O., Kren, F., Kullander, S., Kupsc, A., Kuzmin, A., Lindberg, K., Marciniewski, P., Morosov, B., Oelert, W., Pauly, C., Petren, H., Petukhov, Y., Povtorejko, A., Scobel, W., Shafigullin, R., Shwartz, B., Skorodko, T., Sopov, V., Stepaniak, J., Tegner, P. -E., Thoerngren-Engblom, P., Tikhomirov, V., Turowiecki, A., Wagner, G. J., Wilkin, C., Wolke, M., Zabierowski, J., Zartova, I., and Zlomanczuk, Jozef

Subjects
ddc:530, Nuclear Experiment
Abstract

The cross section for the pd --> ^3He eta pi0 reaction has been measured at a beam energy of 1450 MeV using the WASA detector at the CELSIUS storage ring and detecting one ^3He and four photons from the decays of the two photons. The data indicate that the production mechanism involves the formation of the Delta(1232) isobar. Although the beam energy does not allow the full peak of this resonance to be seen, the invariant masses of all three pairs of final state particles are well reproduced by a phase space Monte Carlo simulation weighted with the p-wave factor of the square of the pi^0 momentum in the ^3Hepi^0 system., Comment: 10 pages, 5 figures

Published
2010

35. Production of the omega meson in the pd --> 3He omega reaction at 1450 MeV and 1360 MeV

Author

Schonning, K., Bargholtz, Chr., Bashkanov, M., Berlowski, M., Bogoslawsky, D., Calen, H., Clement, H., Demirors, L., Ekstrom, C., Fransson, K., Geren, L., Gustafsson, L., Hoistad, B., Ivanov, G., Jacewicz, M., Jiganov, E., Johansson, T., Keleta, S., Khakimova, O., Khemchandani, K. P., Kren, F., Kullander, S., Kupsc, A., Kuzmin, A., Lindberg, K., Marciniewski, P., Morosov, B., Oelert, W., Pauly, C., Petren, H., Petukhov, Y., Povtorejko, A., Ruber, R. J. M. Y., Scobel, W., Shafigullin, R., Shwartz, B., Skorodko, T., Sopov, V., Stepaniak, J., Tegner, P. -E., Engblom, P. Thorngren, Tikhomirov, V., Turowiecki, A., Wagner, G. J., Wilkin, C., Wolke, M., Zabierowski, J., Zartova, I., and Zlomanczuk, J.

Subjects
Nuclear Theory, Nuclear Experiment
Abstract

The production of $\omega$ mesons in the $pd \to{}^3$He$ \omega$ reaction has been studied at two energies near the kinematic threshold, $T_p=1450$ MeV and $T_p=1360$ MeV. The differential cross section was measured as a function of the $\omega$ cm angle at both energies over the whole angular range. Whereas the results at 1360 MeV are consistent with isotropy, strong rises are observed near both the forward and backward directions at 1450 MeV. Calculations made using a two-step model with an intermediate pion fail to reproduce the shapes of the measured angular distributions and also underestimate the total cross sections., Comment: 10 pages, 13 figures

Published
2009

36. Measurement of the eta -> 3 pi(0) Dalitz plot distribution with the WASA detector at COSY

Author

ADOLPH, C, ANGELSTEIN, M, BASHKANOV, M, BECHSTEDT, U, BELOSTOTSKI, S, BERLOWSKI, M, BHATT, H, BISPLINGHOFF, J, BONDAR, A, BORASOY, B, BUSCHER, M, SCOBEL, W, SEFZICK, T, SERDYUK, V, SHAH, N, SIEMASZKO, M, SIUDAK, R, SKORODKO, T, SMOLINSKI, T, SMYRSKI, J, SOPOV, V, CALEN, H, SPOLGEN, D, STEPANIAK, J, STERZENBACH, G, STROHER, H, SZCZUREK, A, TEUFEL, A, TOLBA, T, TRZCINSKI, A, ULBRICH, K, VARMA, R, CHANDWANI, K, VLASOV, P, WEGLORZ, W, WINNEMOLLER, A, WIRZBA, A, WOLKE, M, WRONSKA, A, WUSTNER, R, XU, H, YAMAMOTO, A, YAMAOKA, H, CLEMENT, H, YUAN, X, YUREV, L, ZABIEROWSKI, J, ZHENG, C, ZIELINSKI, MJ, ZIPPER, W, ZLOMANCZUK, J, ZWOLL, K, ZYCHOR, I, CZERWINSKI, E, CZYZYKIEWICZ, R, D'ORSANEO, G, DUNIEC, D, EKSTROM, C, ENGELS, R, ERVEN, W, EYRICH, W, FEDORETS, P, FELDEN, O, FRANSSON, K, GIL, D, GOLDENBAUM, F, GRIGORYEV, K, HECZKO, A, HANHART, C, HEJNY, V, HINTERBERGER, F, HODANA, M, HOISTAD, B, IZOTOV, A, JACEWICZ, M, JANUSZ, M, JANY, BR, JARCZYK, L, JOHANSSON, T, KAMYS, B, KEMMERLING, G, KESHELASHVILI, I, KHAKIMOVA, O, KHOUKAZ, A, KILIAN, K, KIMURA, N, KISTRYN, S, KLAJA, J, KLAJA, P, KLEINES, H, KLOS, B, KOWALCZYK, A, KREN, F, KRZEMIEN, W, KULESSA, P, KULLANDER, S, KUPSC, A, KUZMIN, A, KYRYANCHUK, V, MAJEWSKI, J, MACHNER, H, MAGIERA, A, MAIER, R, MARCINIEWSKI, R, MIGDAL, W, MEISSNER, UG, MIKIRTYCHIANTS, M, MIKLUKHO, O, MILKE, N, MITTAG, M, MOSKAL, P, NANDI, BK, NAWROT, A, NISSLER, R, ODOYO, MA, OELERT, W, OHM, H, PAUL, N, PAULY, C, PETUKHOV, Y, PISKUNOV, N, PLUCINSKI, P, PODKOPAL, P, POVTOREYKO, A, PRASUHN, D, PRICKING, A, PYSZ, K, RACHOWSKI, J, RAUSMANN, T, REDMER, CF, RITMAN, J, ROY, A, RUBER, RJMY, RUDY, Z, SALMIN, R, SCHADMAND, S, SCHMIDT, A, SCHNEIDER, H, and SCHROEDER, W

Subjects
Current-Algebra, Performance, Dalitz plot, Nuclear Theory, hadronic decay [eta], 1.4 GeV, interaction [p p], final-state interaction [pi pi], Juelich COSY PS, +2p+eta%22">p p --> 2p eta, eta, Final-State Interactions, +3+pi%280%29%22">eta -> 3 pi(0), Chiral Perturbation-Theory, +3+Pi%280%29%22">Eta -> 3 Pi(0), Channels, 3-Pi%22">Eta->3-Pi, ddc:530, Nuclear Experiment, Daq System, hadroproduction [eta], Eta, Pi-Pi Scattering, Electromagnetic Corrections, slope [Dalitz plot], Dalitz Plot, High Energy Physics::Experiment, Decays, +3pi0%22">eta --> 3pi0
Abstract

In the first production run of the WASA experiment at COSY, the eta decay into three neutral pions was measured in proton-proton interactions at a proton beam kinetic energy of 1.4 GeV. The Dalitz plot of the three pions was studied using 1.2e5 fully reconstructed events, and the quadratic slope parameter alpha was determined to be -0.027+/-0.008(stat)+/-0.005(syst). The result is consistent with previous measurements and further corroborates the importance of pion-pion final state interactions., Comment: 6 pages, 4 figures, elsarticle

Published
2009

37. Production of the meson in the pd3He reaction at 1450 MeV and 1360 MeV

Author

Schönning, K., Bargholtz, Chr., Geren, L., Gustafsson, L., Höistad, B., Ivanov, G., Jacewicz, M., Jiganov, E., Johansson, T., Keleta, S., Khakimova, O., Khemchandani, K., Bashkanov, M., Kren, F., Kullander, S., Kupsc, A., Kuzmin, A., Lindberg, K., Marciniewski, P., Morosov, B., Oelert, W., Pauly, C., Petren, H., Berlowski, M., Petukhov, Y., Povtorejko, A., Ruber, R., Scobel, W., Shafigullin, R., Shwartz, B., Skorodko, T., Sopov, V., Stepaniak, J., Tegner, E., Bogoslawsky, D., Thörngren-Engblom, P., Tikhomirov, V., Turowiecki, A., Wagner, G. J., Wilkin, C., Wolke, M., Zabierowski, J., Zartova, I., Zlomanczuk, J., Calen, H., Clement, H., Demirörs, L., Ekström, C., and Fransson, K.

Subjects
Nuclear Theory, ddc:530, Nuclear Experiment
Abstract

The production of omega mesons in the pd -> He-3 omega reaction has been studied at two energies near the kinematic threshold, T-p = 1450 MeV and T-p = 1360 MeV. The differential cross section was measured as a function of the omega c.m. angle at both energies over the whole angular range. Whereas the results at 1360 MeV are consistent with isotropy, strong rises are observed near both the forward and backward directions at 1450 MeV. Calculations made using a two-step model with an intermediate pion fail to reproduce the shapes of the measured angular distributions and also underestimate the total cross sections.

Published
2009

38. Measurement of the $\eta \rightarrow 3\pi ^{0}$ Dalitz plot distribution with the WASA detector at COSY

Author

Adolph, C., Angelstein, M., Bashkanov, M., Bechstedt, U., Belostotski, S., Berłowski, M., Bhatt, H., Bisplinghoff, J., Bondar, A., Borasoy, B., Büscher, M., Calén, H., Chandwani, K., Clement, H., Czerwiński, Eryk, Czyżykiewicz, Rafał, D'Orsaneo, G., Duniec, D., Ekström, C., Engels, R., Erven, W., Eyrich, W., Fedorets, P., Felden, O., Fransson, K., Gil, Damian, Goldenbaum, F., Grigoryev, K., Heczko, Andrzej, Hanhart, C., Hejny, V., Hinterberger, F., Hodana, M., Höistad, B., Izotov, A., Jacewicz, M., Janusz, Michał, Jany, Benedykt, Jarczyk, Lucjan, Johansson, T., Kamys, Bogusław, Kemmerling, G., Keshelashvili, I., Khakimova, O., Khoukaz, A., Kilian, K., Kimura, N., Kistryn, Stanisław, Klaja, Joanna, Klaja, Paweł, Kleines, H., Klos, B., Kowalczyk, A., Kren, F., Krzemień, Wojciech, Kulessa, P., Kullander, S., Kupść, A., Kuzmin, A., Kyryanchuk, V., Majewski, J., Machner, H., Magiera, Andrzej, Maier, R., Marciniewski, P., Migdał, Wojciech, Meißner, U.-G., Mikirtychiants, M., Miklukho, O., Milke, N., Mittag, M., Moskal, Paweł, Nandi, B. K., Nawrot, A., Nißler, R., Odoyo, M. A., Oelert, W., Ohm, H., Paul, N., Pauly, C., Petukhov, Y., Piskunov, N., Pluciński, P., Podkopał, Paweł, Povtoreyko, A., Prasuhn, D., Pricking, A., Pysz, K., Rachowski, J., Rausmann, T., Redmer, C. F., Ritman, J., Roy, A., Ruber, R. J. M. Y., Rudy, Zbigniew, Salmin, R., Schadmand, S., Schmidt, A., Schneider, H., Schroeder, W., Scobel, W., Sefzick, T., Serdyuk, V., Shah, N., Siemaszko, M., Siudak, R., Skorodko, T., Smoliński, Tytus, Smyrski, Jerzy, Sopov, V., Spölgen, D., Stepaniak, J., Sterzenbach, G., Ströher, H., Szczurek, A., Teufel, A., Tolba, T., Trzciński, A., Ulbrich, K., Varma, R., Vlasov, P., Weglorz, W., Winnemöller, A., Wirzba, A., Wolke, M., Wrońska, Aleksandra, Wüstner, P., Xu, H., Yamamoto, A., Yamaoka, H., Yuan, X., Yurev, L., Zabierowski, J., Zheng, C., Zieliński, Marcin, Zipper, W., Złomańczuk, J., Zwoll, K., and Zychor, I.

Published
2009

39. ΔΔ excitation in proton–proton induced [formula omitted] production

Author

Skorodko, T., Bashkanov, M., Bogoslawsky, D., Calén, H., Clement, H., Doroshkevich, E., Demiroers, L., Ekström, C., Fransson, K., Gustafsson, L., Höistad, B., Ivanov, G., Jacewicz, M., Jiganov, E., Johansson, T., Khakimova, O., Keleta, S., Koch, I., Kren, F., Kullander, S., Kupść, A., Marciniewski, P., Meier, R., Morosov, B., Pauly, C., Petrén, H., Petukhov, Y., Povtorejko, A., Ruber, R.J.M.Y., Schönning, K., Scobel, W., Shwartz, B., Stepaniak, J., Thörngren-Engblom, P., Tikhomirov, V., Wagner, G.J., Wolke, M., Yamamoto, A., Zabierowski, J., and Zlomanczuk, J.

Published
2011
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40. Polarisation of the omega meson in the pd-->3He+omega reaction at 1360 and 1450 MeV

Author

Schonning, K., Bargholtz, Chr., Bashkanov, M., Berlowski, M., Bogoslawsky, D., Calen, H., Clement, H., Demirors, L., Ekstrom, C., Fransson, K., Geren, L., Gustafsson, L., Hoistad, B., Ivanov, G., Jacewicz, M., Jiganov, E., Johansson, T., Keleta, S., Khakimova, O., Koch, I., Kren, F., Kullander, S., Kupsc, A., Kuzmin, A., Lindberg, K., Marciniewski, P., Morosov, B., Oelert, W., Pauly, C., Pettersson, H., Petukhov, Y., Povtorejko, A., Ruber, R. J. M. Y., Scobel, W., Shafigullin, R., Shwartz, B., Skorodko, T., Sopov, V., Stepaniak, J., Tegner, P. -E., Engblom, P. Thorngren, Tikhomirov, V., Turowiecki, A., Wagner, G. J., Wilkin, C., Wolke, M., Zabierowski, J., Zartova, I., and Zlomanczuk, J.

Subjects
High Energy Physics::Phenomenology, Nuclear Theory, High Energy Physics::Experiment, Nuclear Experiment
Abstract

The tensor polarisation of omega mesons produced in the pd-->3He+omega reaction has been studied at two energies near threshold. The 3He nuclei were detected in coincidence with the pi0pi+pi- or pi0gamma decay products of the omega. In contrast to the case of phi meson production, the omega mesons are found to be unpolarised. This brings into question the applicability of the Okubo-Zweig-Iizuka rule when comparing the production of vector mesons in low energy hadronic reactions., Comment: 11 pages, 4 figures

Published
2008

41. Measurement of the slope parameter for the n->3pi0 decay in the pp ->ppn reaction

Author

Bashkanov, M., Bogoslawsky, D., Calén, H., Capellaro, F., Clement, H., Demirörs, L., Ekström, C., Fransson, K., Gustafsson, L., Höistad, B., Ivanov, G., Jacewicz, M., Jiganov, E., Johansson, T., Keleta, S., Koch, I., Kullander, S., Kupsc, A., Kuznetsov, A., Marciniewski, P., Meier, R., Morosov, B., Oelert, W., Pauly, C., Petukhov, Y., Pettersson, H., Povtorejko, A., Ruber, R. J. M. Y., Schönning, K., Scobel, W., Skorodko, T., Shwartz, B., Sopov, V., Stepaniak, J., Tchernyshev, V., Engblom, P. Thörngren, Tikhomirov, V., Turowiecki, A., Wagner, G. J., Wiedner, U., Wolke, M., Yamamoto, A., Zabierowski, J., and Złomańczuk, J.

Subjects
exclusive reaction [p p], hadroproduction [eta], Dalitz plot, missing-mass [mass spectrum], hadronic decay [eta], radiative decay [pi0], +2p+eta%22">p p --> 2p eta, Uppsala CELSIUS Stor, (3pi0) [final state], 1.36-1.45 GeV-kin, slope, High Energy Physics::Experiment, ddc:530, Astrophysics::Earth and Planetary Astrophysics, Nuclear Experiment, +3pi0%22">eta --> 3pi0, (2pi0) [mass spectrum], experimental results, +2photon%22">pi0 --> 2photon
Abstract

The CELSIUS/WASA setup is used to measure the 3pi0 decay of eta mesons produced in pp interactions with beam kinetic energies of 1.36 and 1.45 GeV. The efficiency-corrected Dalitz plot and density distributions for this decay are shown, together with a fit of the quadratic slope parameter alpha yielding alpha = -0.026 +/- 0.010(stat) +/- 0.010(syst). This value is compared to recent experimental results and theoretical predictions., Comment: 4 pages, 7 Postscript figures, uses revtex4.sty

Published
2007

42. Two-Pion Production in Nucleon-Nucleon Collisions and the ABC-Effect - Approaching a Puzzleby exclusive and Kinematically complete Measurements

Author

Skorodko, T., Bashkanov, M., Bargholtz, C., Bogoslawsky, D., Calen, H., Cappellaro, F., Clement, H., Demiroers, L., Doroshkevich, E., Duniec, D., Ekstrom, C., Fransson, K., Geren, L., Hoistad, L. Gustafsson. B., Ivanov, G., Jacewicz, l M., Jiganov, E., Johansson, T., Kaskulov, M., Khakimova, O., Keleta, S., Koch, I., Kren, F., Kullander, S., Kupsc, A., Kuznetsov, A., Lindberg, K., Marciniewski, P., Martemyanov, B., Meier, R., Morosov, B., Oelert, W., Pauly, C., Pettersson, H., Petukhov, Y., Povtorejko, A., Pricking, A., Ruber, R. J. M. Y., Schonning, K., Scobel, W., Shwartz, B., Sopov, V., Stepaniak, J., Tegner, P. -E., Thorngren-Engholm, P., Tikhomirov, V., Turowiecki, A., Wagner, G. J., Wolke, M., Yamamoto, A., Zabierowski, J., Zartova, I., and Zlomanczuk, J.

Subjects
FOS: Physical sciences, Nuclear Experiment (nucl-ex), Nuclear Experiment
Abstract

The ABC effect - a puzzling low-mass enhancement in the $\pi\pi$ invariant mass spectrum - is known from inclusive measurements of two-pion production in nuclear collisions, where it always showed up, if the participating nucleons fused to a bound nuclear system in the final state. The first exclusive measurements on the ABC effect have been carried out very recently at CELSIUS-WASA for the fusion reactions leading to d, $^3$He and $^4$He nuclei in the final state. The data analyzed so far for the fusion processes to d and $^3$He reveal this effect to be a $\sigma$ channel phenomenon associated with the formation of a strongly attractive $\Delta\Delta$ system. The data for the strictly isospin-selective double-pionic fusion to $^4$He, where we expect the largest effect, are currently still analyzed. All inclusive data on this system are well described by our model, too. This case also constitutes the heaviest nuclear system, where exclusive measurements of double-pionic fusion can be carried out with present-day instruments. Surprisingly, the $pp \to pp\pi^0\pi^0$ reaction in the $\Delta\Delta$ region is observed to also show a ABC-like low-$\pi\pi$ mass enhancement, a phenomenon, which deserves special attention.

Published
2006

43. Measurement of the eta->pi+pi-e+e- decay branching ratio

Author

Bargholtz, C., Bashkanov, M., Gustafsson, L., Höistad, B., Ivanov, G., Jacewicz, M., Jiganov, E., Johansson, T., Keleta, S., Koch, I., Kullander, S., Kupsc, A., Bogoslawsky, D., Kuznetsov, A., Laukhin, I. V., Lindberg, K., Marciniewski, P., Meier, R., Morosov, B., Oelert, W., Pauly, C., Pettersson, H., Petukhov, Y., Calen, H., Povtorejko, A., Ruber, R.J.M.Y., Schönning, K., Scobel, W., Shafigullin, R., Shwartz, B., Skorodko, T., Sopov, V., Stepaniak, J., Tchernyshev, V., Cappellaro, F., Tegner, P. E., Thörngren-Engblom, P., Tikhomirov, V., Turowiecki, A., Wagner, G. J., Wolke, M., Yamamoto, A., Zabierowski, J., Zartova, I., Zlomanczuk, J., Clement, H., CELSIUS-WASA, Coll., Demirörs, L., Ekström, C., Fransson, K., and Geren, L.

Subjects
hadroproduction [eta], dalitz decays, 0.893 GeV-kin, exclusive reaction [p deuteron], (pi+ pi- positron electron) [mass spectrum], Uppsala CELSIUS Stor, High Energy Physics - Experiment, pair production [pi], +helium-3+eta%22">p deuteron --> helium-3 eta, ddc:530, High Energy Physics::Experiment, pair production [electron], eta meson decays, semileptonic decay [eta], +pi%2B+pi-+positron+electron%22">eta --> pi+ pi- positron electron, experimental results [magnetic detector], Nuclear Experiment, Astrophysics::Galaxy Astrophysics, branching ratio [eta]
Abstract

The reaction pd->3He eta at threshold was used to provide a clean source of eta mesons for decay studies with the WASA detector at CELSIUS. The branching ratio of the decay eta->pi+pi-e+e- is measured to be (4.3+/-1.3+/-0.4)x10^-4., Comment: 10 pages,6 figures revised version

Published
2006

44. The pp -> pp pi pi pi reaction channels in the threshold region

Author

Collaboration, CELSIUS-WASA, Pauly, C., Jacewicz, M., Koch, I., Bashkanov, M., Bogoslawsky, D., Calén, H., Capellaro, F., Clement, H., Demirörs, L., Ekström, C., Fransson, K., Gustafsson, L., Höistad, B., Ivanov, G., Jiganov, E., Johansson, T., Keleta, S., Kullander, S., Kupść, A., Kuznetsov, A., Marciniewski, P., Meier, R., Morosov, B., Oelert, W., Pettersson, H., Petukhov, Y., Povtorejko, A., Ruber, R. J. M. Y., Scobel, W., Schönning, K., Skorodko, T., Shwartz, B., Sopov, V., Stepaniak, J., Tchernyshev, V., Engblom, P. Thörngren, Tikhomirov, V., Turowiecki, A., Wagner, G. J., Wiedner, U., Wolke, M., Yamamoto, A., Zabierowski, J., and Złomańczuk, J.

Subjects
High Energy Physics::Experiment, Nuclear Experiment
Abstract

The cross section for prompt neutral and charged three pion production in pp interactions was measured at excess energies in the range 160 - 217 MeV. That comprises the first measurement of the pp->pp pi0pi0pi0 reaction and the comparison with the pp->pp pi+pi-pi0 reaction, in a very direct way. The experiment was performed above the eta meson production threshold and the cross section normalization was obtained from a concurrent measurement of the reaction pp->pp eta with the eta decaying into 3 pions. Since the same final states are selected, the measurement has a low systematical error. The measured cross section ratio sigma(pp->pp pi+pi-pi0)/sigma(pp->pp pi0\pi0\pi0) is compared to predictions of dominance of different isobars in the intermediate state., Comment: 12 pages, 4 figures New discussion on the pp->pp3pi reaction mechanism

Published
2006

45. Upper limits on resonance contributions to proton-proton elastic scattering in the c.m. mass range 2.05-2.85 GeV/c^2

Author

Rohdjeß, H., Altmeier, M., Bauer, F., Bisplinghoff, J., Bollmann, R., Büßer, K., Busch, M., Diehl, O., Dohrmann, F., Engelhardt, H.-P., Ernst, J., Eversheim, P. D., Eyser, K. O., Felden, O., Gebel, R., Groß, A., Groß-Hardt, R., Hinterberger, F., Langkau, R., Lindlein, J., Maier, R., Mosel, F., Prasuhn, D., Rossen, P., Scheid, H., Schulz-Rojahn, F., Schwandt, F., Schwarz, V., Scobel, W., Trelle, H.-J., Ulbrich, K., Weise, E., Wellinghausen, A., Woller, K., and Ziegler, R.

Subjects
13.75.Cs Nucleon-nucleon interactions (including antinucleon and deuterons etc.), PACS. 25.40.Cm Elastic proton scattering, 14.20.Pt Dibaryons, 11.80.Et Partial-wave analysis
Abstract

Recently published excitation functions in proton-proton (pp) elastic scattering observables in the laboratory energy range 0.5-2.5GeV provide an excellent data base to establish firm upper limits on the elasticities ηel = Γel/Γtot of possible isovector resonant contributions to the nucleon-nucleon (NN) system. Such contributions have been predicted to arise from dibaryonic states, with c.m. masses between 2.1-2.9GeV/c2, but have not been confirmed experimentally. A method to determine quantitatively the maximum value of ηel compatible with experimental data is presented. We use energy-dependent phase shift fits to the pp data base to model the non-resonant interaction. Based upon the differential cross-section data measured by the EDDA Collaboration an unbiased statistical test is constructed to obtain upper limits on ηel, that exclude larger values with a 99% confidence level. Results in the c.m. mass range 2.05-2.85GeV/c2 and total widths of 10-100MeV/c2 in the partial waves 1S0, 1D2, 3P0, 3P1, and 3F3 are presented and discussed.

Published
2006

46. Exclusive Measurements of $pd\to ^3He \pi\pi$ : the $ABC$ Effect Revisited

Author

Bashkanov, M., Bogoslawsky, D., Höistad, B., Ivanov, G., Jacewicz, M., Jiganov, E., Johansson, T., Khakimova, O., Kaskulov, M. M., Keleta, S., Koch, I., Kren, F., Calen, H., Kullander, S., Kupsc, A., Kuznetsov, A., Marciniewski, P., Meier, R., Morosov, B., Oelert, W., Pauly, C., Petukhov, Y., Povtorejko, A., Cappellaro, F., Ruber, R.J.M.Y., Scobel, W., Skorodko, T., Shwartz, B., Sopov, V., Stepaniak, J., Tchernyshev, V., Thörngren-Engblom, P., Tikhomirov, V., Turowiecki, A., Clement, H., Wagner, G. J., Wolke, M., Yamamoto, A., Zabierowski, J., Zlomanczuk, J., Demiroers, L., Ekström, C., Fransson, K., Greiff, J., and Gustafsson, L.

Subjects
experimental results [four-pi-detector], two-pion [mass spectrum], pair production [pi], Dalitz plot, 0.893 GeV-cms, mass enhancement, ddc:530, angular distribution, +helium-3+pi%2B+pi%22">p deuteron --> helium-3 pi+ pi, Nuclear Experiment, exclusive reaction [p deuteron], Uppsala CELSIUS Stor, +helium-3+2pi0%22">p deuteron --> helium-3 2pi0
Abstract

Exclusive measurements of the reactions $pd\to$ $^3He \pi^+ \pi^-$ and $pd\to$ $^3He \pi^0\pi^0$ have been carried out at $T_p=0.895$ GeV at the CELSIUS storage ring using the WASA detector. The $\pi^+\pi^-$ channel evidences a pronounced enhancement at low invariant $\pi\pi$ masses - as anticipated from previous inclusive measurements of the ABC effect. This enhancement is seen to be even much larger in the isoscalar $\pi^0\pi^0$ channel. The differential distributions prove this enhancement to be of scalar-isoscalar nature. $\Delta\Delta$ calculations give a good description of the data, if a boundstate condition is imposed for the intermediate $\Delta\Delta$ system., Comment: extended version, 8 pages, 7 figures, theoretical model calculations added

Published
2005

47. Excitation functions of spin correlation parameters A_{NN}, A_{SS}, and A_{SL} in elastic pp scattering between 0.45 and 2.5 GeV

Author

Bauer, F., Bisplinghoff, J., Gebel, R., Greiff, J., Hinterberger, F., Jonas, E., Krause, H., Lehmann, C., Lindlein, J., Maier, R., Meinerzhagen, A., Pauly, C., Büsser, K., Prasuhn, D., Rohdjess, H., Rosendaal, D., Rossen, P., Schirm, N., Scobel, W., Ulbrich, K., Weise, E., Wolf, T., Ziegler, R., Busch, M., Colberg, T., Dahl, C., Demirörs, L., Eversheim, P. D., Eyser, K. O., and Felden, J. M.

Subjects
Condensed Matter::Quantum Gases, polarized target [hydrogen], FOS: Physical sciences, momentum dependence, partial wave analysis, Juelich COSY PS, angular dependence, polarized beam [p], correlation [spin], 0.45-2.50 GeV-kin, Physics::Accelerator Physics, ddc:530, elastic scattering [p p], Nuclear Experiment (nucl-ex), experimental results [scintillation counter], Nuclear Experiment, scattering amplitude [p p]
Abstract

Excitation functions of the spin correlation coefficients A_{NN}(p_{lab},theta_{c.m.}), A_{SS}(p_{lab},theta_{c.m.}), and A_{SL}(p_{lab},theta_{c.m.}) have been measured with the polarized proton beam of the Cooler Synchrotron COSY and an internal polarized atomic beam target. Data were taken continuously during the acceleration for proton momenta p_{lab} ranging from 1000 to 3300 MeV/c (kinetic energies T_{lab} 450 - 2500 MeV) as well as for discrete momenta of 1430 MeV/c and above 2000 MeV/c covering angles theta_{c.m.} between 30 deg and 90 deg. The data are of high internal consistency. Whereas A_{SL}(p_{lab,}theta_{c.m.}) is small and without structures in the whole range, A_{NN} and even more A_{SS} show a pronounced energy dependence. The angular distributions for A_{SS} are at variance with predictions of existing phase shift analyses at energies beyond 800 MeV. The impact of our results on phase shift solutions is discussed. The direct reconstruction of the scattering amplitudes from all available pp elastic scattering data considerably reduces the ambiguities of solutions., 13 pages, 17 figures

Published
2004

48. The [formula omitted] reaction at [formula omitted]

Author

Schönning, K., Bargholtz, Chr., Bashkanov, M., Berłowski, M., Bogoslawsky, D., Calén, H., Clement, H., Demirörs, L., Ekström, C., Fransson, K., Gerén, L., Gustafsson, L., Höistad, B., Ivanov, G., Jacewicz, M., Jiganov, E., Johansson, T., Keleta, S., Khakimova, O., Kren, F., Kullander, S., Kupść, A., Kuzmin, A., Lindberg, K., Marciniewski, P., Morosov, B., Oelert, W., Pauly, C., Petrén, H., Petukhov, Y., Povtorejko, A., Scobel, W., Shafigullin, R., Shwartz, B., Skorodko, T., Sopov, V., Stepaniak, J., Tegnér, P.-E., Thörngren Engblom, P., Tikhomirov, V., Turowiecki, A., Wagner, G.J., Wilkin, C., Wolke, M., Zabierowski, J., Zartova, I., and Złomańczuk, J.

Published
2010
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49. Exclusive measurements of [formula omitted]: Double-pionic fusion without ABC effect

Author

Kren, F., Bashkanov, M., Bogoslawsky, D., Calén, H., Clement, H., Demiroers, L., Ekström, C., Fransson, K., Greiff, J., Gustafsson, L., Höistad, B., Ivanov, G., Jacewicz, M., Jiganov, E., Johansson, T., Khakimova, O., Keleta, S., Koch, I., Kullander, S., Kupść, A., Marciniewski, P., Meier, R., Morosov, B., Pauly, C., Petrén, H., Petukhov, Y., Povtorejko, A., Ruber, R.J.M.Y., Schönning, K., Scobel, W., Skorodko, T., Shwartz, B., Stepaniak, J., Thörngren-Engblom, P., Tikhomirov, V., Wagner, G.J., Wolke, M., Yamamoto, A., Zabierowski, J., and Zlomanczuk, J.

Published
2010
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50. Modelling nucleon-nucleon scattering above 1 GeV

Author

Eyser, K. O., Machleidt, R., Scobel, W., and Collaboration, the EDDA

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Meson, Nuclear Theory, 010308 nuclear & particles physics, Scattering, FOS: Physical sciences, Perturbative QCD, 01 natural sciences, Nuclear Theory (nucl-th), 0103 physical sciences, High Energy Physics::Experiment, Nuclear Experiment (nucl-ex), 010306 general physics, Nucleon, Nuclear Experiment, Spin-½
Abstract

Motivated by the recent measurement of proton-proton spin-correlation parameters up to 2.5 GeV laboratory energy, we investigate models for nucleon-nucleon (NN) scattering above 1 GeV. Signatures for a gradual failure of the traditional meson model with increasing energy can be clearly identified. Since spin effects are large up to tens of GeV, perturbative QCD cannot be invoked to fix the problems. We discuss various theoretical scenarios and come to the conclusion that we do not have a clear phenomenological understanding of the spin-dependence of the NN interaction above 1 GeV., 36 pages, 8 figures

Published
2003

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