1. Spin alignment and violation of the OZI rule in exclusive ω and ϕ production in pp collisions
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S. Neubert, M. Schott, K. Kondo, P. Jasinski, M. Gorzellik, A.B. Ivanov, A. Magnon, K. Schönning, T. Schlüter, B. Badełek, D.I. Ryabchikov, O.Yu. Denisov, L. Capozza, M. Ziembicki, S. Paul, Alan D. Martin, V. Andrieux, V.N. Kolosov, Ch. Höppner, A. Berlin, R. Jahn, A. Ferrero, C. Elia, G.V. Khaustov, Y. Bedfer, Lei Wang, J. Lichtenstadt, F. Kunne, A. Efremov, W. Dünnweber, A.M. Kotzinian, Q. Curiel, G. Sbrizzai, A. Srnka, Y. Miyachi, R. Geyer, M. Chiosso, E. Burtin, V. Duic, F. Hinterberger, P. Schiavon, W.-D. Nowak, I.A. Savin, S. Ishimoto, J. Pretz, M. Ostrick, I. Uman, S. Gerassimov, P. Bordalo, S. Sarkar, R.P. Kurjata, M.G. Sapozhnikov, S.-U. Chung, N. d'Hose, S.S. Dasgupta, H. Schmieden, V.D. Samoylenko, J. Bieling, M. Büchele, M. V. Zavertyaev, A.A. Lednev, M. Boer, H. Matsuda, N. Makke, A. Grasso, Christian Schill, A.S. Nunes, M. Slunecka, Günter Baum, O.Yu. Shevchenko, D. Panzieri, G.D. Alexeev, D. Neyret, K. Kurek, T. Michigami, K. Klimaszewski, B. Gobbo, T. Grussenmeyer, I. Gnesi, Andres Cicuttin, I. Orlov, A. Maggiora, M. Sulc, J. Bisplinghoff, N. Doshita, E. Zemlyanichkina, M. Wilfert, N. Kuchinski, J.M. Friedrich, N.S. Rossiyskaya, J.H. Koivuniemi, A. Austregesilo, S. Dalla Torre, J. Matousek, J. Pochodzalla, E. M. Kabuß, A. Sandacz, D. Hahne, T. Szameitat, S.V. Donskov, B. Ketzer, C. Marchand, Vladimir Nikolaenko, C. Regali, S. Ramos, K. Zaremba, V.F. Konstantinov, R. Akhunzyanov, Yu.A. Khokhlov, M. Krämer, M. Bodlak, R. Joosten, H. Wollny, K. Schmidt, S. Tessaro, M. Virius, Franco Bradamante, B. Grube, H. Fischer, A. Rychter, T. Guthörl, Yu. Kisselev, K. Bicker, M. Quaresma, R. Panknin, F. Thibaud, S. Takekawa, Yu. Ivanshin, K. Königsmann, R. Hashimoto, S. Uhl, R. Sulej, V.A. Polyakov, S. Huber, A. Amoroso, J. Barth, C. Braun, Bakur Parsamyan, Z.V. Kroumchtein, V. Jary, O.M. Kouznetsov, S. Platchkov, V. Anosov, N. du Fresne von Hohenesche, M. Finger, P.D. Eversheim, I. Konorov, F. Nerling, E. Rocco, C. Franco, F. Sozzi, S. Schopferer, G.K. Mallot, R. Birsa, T. Weisrock, J. Marzec, F.H. Heinsius, W. Eyrich, R. Windmolders, A.G. Olshevsky, N. Horikawa, F. Herrmann, F. Balestra, M. Levillain, V. Frolov, J. ter Wolbeek, G. Reicherz, Takahiro Iwata, Johannes Bernhard, P. Joerg, Andrea Bressan, S. Levorato, F. Tessarotto, C. Quintans, A. Lehmann, M. A. Faessler, D. von Harrach, T. Nagel, S. Goertz, F. Klein, G.V. Meshcheryakov, L. Silva, M. Dziewiecki, S. Sirtl, S. Grabmüller, W. Meyer, Maria Liz Crespo, O.P. Gavrichtchouk, L. Sinha, T. Matsuda, A. Zink, P. Sznajder, M.G. Alexeev, M. Stolarski, L. Steiger, A. Nagaytsev, A. Guskov, A. Szableski, F. Gautheron, J. Novy, F. Haas, C. Adolph, Yu.V. Mikhailov, R. Beck, S. Sosio, H. Suzuki, A. Filin, Adolph, C., Akhunzyanov, R., Alexeev, M. G., Alexeev, G. D., Amoroso, A., Andrieux, V., Anosov, V., Austregesilo, A., Badełek, B., Balestra, F., Barth, J., Baum, G., Beck, R., Bedfer, Y., Berlin, A., Bernhard, J., Bicker, K., Bieling, J., Birsa, R., Bisplinghoff, J., Bodlak, M., Boer, M., Bordalo, P., Bradamante, Franco, Braun, C., Bressan, Andrea, Büchele, M., Burtin, E., Capozza, L., Chiosso, M., Chung, S. U., Cicuttin, A., Crespo, M. L., Curiel, Q., DALLA TORRE, Silvia, Dasgupta, SHUDDHA SHANKAR, Dasgupta, S., Denisov, O. Y. u., Donskov, S. V., Doshita, N., Duic, Venicio, Dünnweber, W., Dziewiecki, M., Efremov, A., Elia, C., Eversheim, P. D., Eyrich, W., Faessler, M., Ferrero, A., Filin, A., Finger, M., Fischer, H., Franco, C., du Fresne von Hohenesche, N., Friedrich, J. M., Frolov, V., Gautheron, F., Gavrichtchouk, O. P., Gerassimov, S., Geyer, R., Gnesi, I., Gobbo, B., Goertz, S., Gorzellik, M., Grabmüller, S., Grasso, A., Grube, B., Grussenmeyer, T., Guskov, A., Guthörl, T., Haas, F., von Harrach, D., Hahne, D., Hashimoto, R., Heinsius, F. H., Herrmann, F., Hinterberger, F., Höppner, C. h., Horikawa, N., D'Hose, N., Huber, S., Ishimoto, S., Ivanov, A., Ivanshin, Y. u., Iwata, T., Jahn, R., Jary, V., Jasinski, P., Joerg, P., Joosten, R., Kabuß, E., Ketzer, B., Khaustov, G. V., Khokhlov, Y. u. A., Kisselev, Y. u., Klein, F., Klimaszewski, K., Koivuniemi, J. H., Kolosov, V. N., Kondo, K., Königsmann, K., Konorov, I., Konstantinov, V. F., Kotzinian, A. M., Kouznetsov, O., Krämer, M., Kroumchtein, Z. V., Kuchinski, N., Kunne, F., Kurek, K., Kurjata, R. P., Lednev, A. A., Lehmann, A., Levillain, M., Levorato, Stefano, Lichtenstadt, J., Maggiora, A., Magnon, A., Makke, Nour, Mallot, G. K., Marchand, C., Martin, Anna, Marzec, J., Matousek, J., Matsuda, H., Matsuda, T., Meshcheryakov, G., Meyer, W., Michigami, T., Mikhailov, Y. u. V., Miyachi, Y., Nagaytsev, A., Nagel, T., Nerling, F., Neubert, S., Neyret, D., Nikolaenko, V. I., Novy, J., Nowak, W. D., Nunes, A. S., Olshevsky, A. G., Orlov, I., Ostrick, M., Panknin, R., Panzieri, D., Parsamyan, B., Paul, S., Platchkov, S., Pochodzalla, J., Polyakov, V. A., Pretz, J., Quaresma, M., Quintans, C., Ramos, S., Regali, C., Reicherz, G., Rocco, E., Rossiyskaya, N. S., Ryabchikov, D. I., Rychter, A., Samoylenko, V. D., Sandacz, A., Sapozhnikov, M., Sarkar, S., Savin, I. A., Sbrizzai, G., Schiavon, Paolo, Schill, C., Schlüter, T., Schmidt, K., Schmieden, H., Schönning, K., Schopferer, S., Schott, M., Shevchenko, O. Y. u., Silva, L., Sinha, L., Sirtl, S., Slunecka, M., Sosio, S., Sozzi, Federica, Srnka, A., Steiger, L., Stolarski, M., Sulc, M., Sulej, R., Suzuki, H., Szableski, A., Szameitat, T., Sznajder, P., Takekawa, Stefano, ter Wolbeek, J., Tessaro, S., Tessarotto, F., Thibaud, F., Uhl, S., Uman, I., Virius, M., Wang, L., Weisrock, T., Wilfert, M., Windmolders, R., Wollny, H., Zaremba, K., Zavertyaev, M., Zemlyanichkina, E., Ziembicki, M., and Zink, A.
- Subjects
Particle physics ,Nuclear and High Energy Physics ,OZI rule, test ,POLARIZATION ,Proton ,Meson ,PROTON-PROTON COLLISIONS ,LOW-ENERGY PHOTOPRODUCTION ,ZWEIG-IIZUKA RULE ,MESON PRODUCTION ,EXPERIMENTAL TESTS ,SELECTION RULE ,NUCLEON ,PION ,Isoscalar ,Nuclear Theory ,OZI rule ,High Energy Physics - Experiment ,Nuclear physics ,test ,Invariant mass ,lcsh:Nuclear and particle physics. Atomic energy. Radioactivity ,Vector meson ,Nuclear Experiment ,Spin-½ ,Physics ,High Energy Physics::Phenomenology ,Baryon ,lcsh:QC770-798 ,High Energy Physics::Experiment ,Particle Physics - Experiment - Abstract
Exclusive production of the isoscalar vector mesons $\omega$ and $\phi$ is measured with a 190 GeV$/c$ proton beam impinging on a liquid hydrogen target. Cross section ratios are determined in three intervals of the Feynman variable $x_{F}$ of the fast proton. A significant violation of the OZI rule is found, confirming earlier findings. Its kinematic dependence on $x_{F}$ and on the invariant mass $M_{p\mathrm{V}}$ of the system formed by fast proton $p_\mathrm{fast}$ and vector meson $V$ is discussed in terms of diffractive production of $p_\mathrm{fast}V$ resonances in competition with central production. The measurement of the spin density matrix element $\rho_{00}$ of the vector mesons in different selected reference frames provides another handle to distinguish the contributions of these two major reaction types. Again, dependences of the alignment on $x_{F}$ and on $M_{p\mathrm{V}}$ are found. Most of the observations can be traced back to the existence of several excited baryon states contributing to $\omega$ production which are absent in the case of the $\phi$ meson. Removing the low-mass $M_{p\mathrm{V}}$ resonant region, the OZI rule is found to be violated by a factor of eight, independently of $x_\mathrm{F}$., Comment: 23 pages, 13 figures and 5 tables
- Published
- 2014