Exclusive Measurement of the eta --> pi+ pi- gamma Decay

Autor: Adlarson, P., Adolph, C., Augustyniak, W., Bardan, W., Bashkanov, M., Bednarski, T., Bergmann, F. S., Berłowski, M., Bhatt, H., Brinkmann, K. -T., Büscher, M., Calén, H., Clement, H., Coderre, D., Czerwiński, E., Doroshkevich, E., Engels, R., Erven, W., Eyrich, W., Fedorets, P., Föhl, K., Fransson, K., Goldenbaum, F., Goslawski, P., Grigoryev, K., Gullström, C. -O., Hanhart, C., Heijkenskjöld, L., Heimlich, J., Hejny, V., Hinterberger, F., Hodana, M., Höistad, B., Jacewicz, M., Jany, A., Jany, B. R., Jarczyk, L., Johansson, T., Kamys, B., Kemmerling, G., Khakimova, O., Khoukaz, A., Kistryn, S., Klaja, J., Kleines, H., Kłos, B., Kren, F., Krzemień, W., Kulessa, P., Kupść, A., Lalwani, K., Leupold, S., Lorentz, B., Magiera, A., Maier, R., Mariański, B., Marciniewski, P., Meißner, U. -G., Mikirtychiants, M., Morsch, H. -P., Moskal, P., Nandi, B. K., Niedźwiecki, S., Ohm, H., Passfeld, A., Pauly, C., del Rio, E. Perez, Petri, T., Petukhov, Y., Piskunov, N., Pluciński, P., Podkopał, P., Povtoreyko, A., Prasuhn, D., Pricking, A., Pysz, K., Pyszniak, A., Rausmann, T., Redmer, C. F., Ritman, J., Roy, A., Rudy, Z., Sawant, S., Schadmand, S., Schmidt, A., Sefzick, T., Serdyuk, V., Shah, N., Siemaszko, M., Siudak, R., Skorodko, T., Skurzok, M., Smyrski, J., Sopov, V., Stassen, R., Stepaniak, J., Sterzenbach, G., Stockhorst, H., Stollenwerk, F., Szczurek, A., Täschner, A., Terschlüsen, C., Tolba, T., Trzciński, A., Varma, R., Vlasov, P., Wagner, G. J., Węglorz, W., Winnemöller, A., Wirzba, A., Wolke, M., Wrońska, A., Wüstner, P., Wurm, P., Yuan, X., Yurev, L., Zabierowski, J., Zheng, C., Zieliński, M. J., Zipper, W., Złomańczuk, J., Żuprański, P.

Publikováno v: Physics Letters B 707 (2012), pp. 243-249

An exclusive measurement of the decay eta --> pi+ pi- gamma has been performed at the WASA facility at COSY. The eta mesons were produced in the fusion reaction pd --> 3He X at a proton beam momentum of 1.7 GeV/c. Efficiency corrected differential di

Externí odkaz: http://arxiv.org/abs/1107.5277

Neutral pion number fluctuations at high multiplicity in pp-interactions at 50 GeV

Autor: Collaboration, SVD-2, Afonin, A. G., Aleev, A. N., Ardashev, E. N., Avdeichikov, V. V., Balandin, V. P., Basiladze, S. G., Batouritski, M. A., Berezhnev, S. F., Bogdanova, G. A., Borzunov, Yu. T., Budilov, V. A., Chentsov, Yu. A., Golovkin, V. F., Golovnya, S. N., Gorokhov, S. A., Grishin, N. I., Grishkevich, Ya. V., Ermakov, G. G., Ermolov, P. F., Furmanets, N. F., Karmanov, D. E., Karpov, A. V., Kekelidze, G. D., Kireev, V. I., Kiryakov, A. A., Kholodenko, A. G., Kokoulina, E. S., Konstantinov, V. V., Kramarenko, V. N., Kubarovsky, A. V., Kulikov, A. K., Kuraev, E. A., Kurchaninov, L. L., Kutov, A. Ya., Kuzmin, N. A., Leflat, G. I. Lanschikov A. K., Lobanov, I. S., Lobanova, E. V., Lyutov, S. I., Lysan, V. N., Merkin, M. M., Mitrofanov, G. A., Myalkovskiy, V. V., Nikitin, V. A., Peshehonov, V. D., Petrov, V. S., Petukhov, Y. P., Pleskach, A. V., Polkovnikov, M. K., Popov, V. V., Riadovikov, V. N., Ronzhin, V. N., Rufanov, I. A., Senko, V. A., Shalanda, N. A., Soldatov, M. M., Spiryakin, V. I., Terletskiy, A. V., Tikhonova, L. A., Tsyupa, Yu. P., Vishnevskaya, A. M., Volkov, V. Yu., Vorobiev, A. P., Voronin, A. G., Yakimchuk, V. I., Yukaev, A. I., Zapolskii, V. N., Zhidkov, N. K., Zotkin, S. A., Zverev, E. G.

Neutral pion number N0 distributions for each total number of particles in event Ntot=Nch+N0 are obtained. The scaled variance of neutral pion fluctuations, omega=D/, is measured. The fluctuations increase at Ntot >22. According to quantum statis

Externí odkaz: http://arxiv.org/abs/1104.3673

Proton interactions with high multiplicity

Autor: Afonin, A. G., Aleev, A. N., Ardashev, E. N., Avdeichikov, V. V., Balandin, V. P., Basiladze, S. G., Batouritski, M. A., Berezhnev, S. F., Bogdanova, G. A., Borzunov, Yu. T., Budilov, V. A., Chentsov, Yu. A., Golovkin, V. F., Golovnya, S. N., Gorokhov, S. A., Grishin, N. I., Grishkevich, Ya. V., Ermakov, G. G., Ermolov, P. F., Furmanets, N. F., Karmanov, D. E., Karpov, A. V., Kekelidze, G. D., Kireev, V. I., Kiryakov, A. A., Kholodenko, A. G., Kokoulina, E. S., Konstantinov, V. V., Kramarenko, V. N., Kubarovsky, A. V., Kulikov, A. K., Kuraev, E. A., Kurchaninov, L. L., Kutov, A. Ya., Kuzmin, N. A., Leflat, G. I. Lanschikov A. K., Lobanov, I. S., Lobanova, E. V., Lutov, S. I., Lysan, V. N., Merkin, M. M., Mitrofanov, G. A., Myalkovskiy, V. V., Nikitin, V. A., Peshehonov, V. D., Petrov, V. S., Petukhov, Y. P., Pleskach, A. V., Polkovnikov, M. K., Popov, V. V., Riadovikov, V. N., Ronzhin, V. N., Rufanov, I. A., Senko, V. A., Shalanda, N. A., Soldatov, M. M., Spiryakin, V. I., Terletskiy, A. V., Tikhonova, L. A., Tsyupa, Yu. P., Vishnevskaya, A. M., Volkov, V. Yu., Vorobiev, A. P., Voronin, A. G., Yakimchuk, V. I., Yukaev, A. I., Zapolskii, V. N., Zhidkov, N. K., Zotkin, S. A., Zverev, E. G.

Project Thermalization (Experiment SERP-E-190 at IHEP) is aimed to study the proton - proton interactions at 50 GeV with large number of secondary particles. In this report the experimentally measured topological cross sections are presented taking i

Externí odkaz: http://arxiv.org/abs/1104.0101

Delta Delta Excitation in Proton-Proton Induced pi0pi0 Production

Autor: Skorodko, T., Bashkanov, M., Bogoslawsky, D., Calen, H., Clement, H., Doroshkevich, E., Demiroers, L., Ekstroem, 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., Schoenning, K., Scobel, W., Shwartz, B., Stepaniak, J., Thoerngren-Engblom, P., Tikhomirov, V., Wagner, G. J., Wolke, M., Yamamoto, A., Zabierowski, J., Zlomanczuk, J.

Publikováno v: Phys.Lett.B695:115-123,2011

Exclusive measurements of the $pp \to pp\pi^0\pi^0$ reaction have been performed at CELSIUS/WASA at energies from threshold up to $T_p$ = 1.3 GeV. Total and differential cross sections have been obtained. Here we concentrate on energies $T_p \ge$ 1 G

Externí odkaz: http://arxiv.org/abs/1007.0405

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

Autor: 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., Zlomanczuk, Jozef

Publikováno v: Phys.Lett.B685:33-37,2010

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 th

Externí odkaz: http://arxiv.org/abs/0911.1012