학술논문

Double $J/\psi$ production in pion-nucleon scattering at COMPASS
Document Type
Working Paper
Author
Alexeev, G. D.Alexeev, M. G.Amoroso, A.Andrieux, V.Anosov, V.Augsten, K.Augustyniak, W.Azevedo, C. D. R.Badelek, B.Ball, M.Barth, J.Beck, R.Bedfer, Y.Bernhard, J.Bodlak, M.Bradamante, F.Bressan, A.Burtsev, V. E.Chang, W. -C.Chatterjee, C.Chiosso, M.Chumakov, A. G.Chung, S. -U.Cicuttin, A.Correia, P. M. M.Crespo, M. L.D'Ago, D.Torre, S. DallaDasgupta, S. S.Dasgupta, S.Denisenko, I.Denisov, O. Yu.Donskov, S. V.Doshita, N.Dreisbach, Ch.Duennweber, W.Dusaev, R. R.Efremov, A.Eremeev, D.Eversheim, P. D.Faccioli, P.Faessler, M.Finger, M.Finger jr., M.Fischer, H.Floethner, K.Florian, WFranco, C.Friedrich, J. M.Frolov, V.Ordonez, L. G. GarciaGautheron, F.Gavrichtchouk, O. P.Gerassimov, S.Giarra, J.Giordano, D.Gorzellik, M.Grasso, A.Gridin, A.Groote, S.Perdekamp, M. GrosseGrube, B.Gruener, M.Guskov, A.von Harrach, D.Hoffmann, M.Horikawa, N.d'Hose, N.Hsieh, C. -Y.Huber, S.Ishimoto, S.Ivanov, A.Iwata, T.Jandek, M.Jary, T.Joosten, R.Kabuss, E.Kaspar, F.Kerbizi, A.Ketzer, B.Khatun, A.Khaustov, G. V.Khokhlov, Yu. A.Klein, F.Koivuniemi, J. H.Kolosov, V. N.Horikawa, K. KondoKonorov, I.Konstantinov, V. F.Korzenev, A.Koshkarev, S.Kotzinian, A. M.Kouznetsov, O. M.Koval, A.Kral, Z.Krinner, F.Kunne, F.Kurek, K.Kurjata, R. P.Kveton, A.Lavickova, K.Levorato, S.Lian, Y. -S.Lichtenstadt, J.Lin, P. -J.Longo, R.Lyubovitskij, V. E.Maggiora, A.Magnon, A.Makins, N.Makke, N.Mallot, G. K.Maltsev, A.Mamon, S. A.Martin, A.Marzec, J.Matousek, J.Matsuda, T.Mattson, G.Pires, C. MenezesMetzger, F.Meyer, M.Meyer, W.Mikhailov, Yu. V.Mikhasenko, M.Mitrofanov, E.Miyachi, Y.Molina, R.Moretti, A.Nagaytsev, A.Naim, C.Neyret, D.Novy, J.Nowak, W. -D.Nukazuka, G.Olshevsky, A. G.Ostrick, M.Panzieri, D.Parsamyan, B.Paul, S.Pekeler, H.Peng, J. -C.Pesek, M.Peshekhonov, D. V.Peskova, M.Platchkov, S.Pochodzalla, J.Polyakov, V. A.Pretz, J.Quaresma, M.Quintans, C.Reicherz, G.Riedl, C.Rudnicki, T.Ryabchikov, D. I.Rychter, A.Rymbekova, A.Samoylenko, V. D.Sandacz, A.Sarkar, S.Savin, I. A.Sbrizzai, G.Schmeing, S.Schmieden, H.Selyunin, A.Sharko, K.Sinha, L.Slunecka, M.Spuelbeck, D.Srnka, A.Steffen, D.Stolarski, M.Subrt, O.Sulc, M.Suzuki, H.Tessaro, S.Tessarotto, F.Thiel, A.Tomsa, J.Tosello, F.Townsend, A.Triloki, T.Tskhaty, V.Valinoti, B.Veit, B. M.Veloso, J. F. C. A.Ventura, B.Virius, M.Wagner, M.Wallner, S.Zaremba, K.Zavertyaev, M.Zemko, M.Zemlyanichkina, E.Ziembicki, M.
Source
Subject
High Energy Physics - Experiment
High Energy Physics - Phenomenology
Language
Abstract
We present the study of the production of double $J/\psi$ mesons using COMPASS data collected with a 190 GeV/$c$ $\pi^-$ beam scattering off NH$_{3}$, Al and W targets. Kinematic distributions of the collected double $J/\psi$ events are analysed, and the double $J/\psi$ production cross section is estimated for each of the COMPASS targets. The results are compared to predictions from single- and double-parton scattering models as well as the pion intrinsic charm and the tetraquark exotic resonance hypotheses. It is demonstrated that the single parton scattering production mechanism gives the dominant contribution that is sufficient to describe the data. An upper limit on the double intrinsic charm content of pion is evaluated. No significant signatures that could be associated with exotic tetraquarks are found in the double $J/\psi$ mass spectrum.
Comment: 12 pages, 4 figures