{"paper":{"title":"Spin Density Matrix Elements in Exclusive $\\omega$ Meson Muoproduction $^*$","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-ex","authors_text":"A. Amoroso, A. Antoshkin, A. Bressan, A. Cicuttin, A. Efremov, A. Ferrero, A.G. Chumakov, A.G. Olshevskiy, A. Grasso, A. Gridin, A. Guskov, A. Ivanov, A. Kerbizi, A. Koval, A. Kveton, A. Maggiora, A. Magnon, A. Maltsev, A. Martin, A.M. Kotzinian, A. Moretti, A. Nagaytsev, A. Rybnikov, A. Rychter, A. Sandacz, A. Selyunin, A.S. Nunes, A. Srnka, A. Thiel, A. Townsend, A. Vauth, A.Vidon, B. Badelek, B. Grube, B.I. Vasilishin, B. Ketzer, B. Marianski, B.M. Veit, B. Parsamyan, B. Ventura, C. Chatterjee, C.D.R. Azevedo, C. Franco, Ch. Dreisbach, C. Naim, C. Quintans, C. Regali, C. Riedl, C.-Y. Hsieh, D. D'Ago, D.I. Ryabchikov, D. Neyret, D. Panzieri, D. Steffen, D. von Harrach, D.V. Peshekhonov, E. Kabuss, E. Mitrofanov, E. Zemlyanichkina, F. Balestra, F. Bradamante, F. Gautheron, F. Herrmann, F. Kaspar, F. Klein, F. Krinner, F. Kunne, F. Tessarotto, F. Tosello, G.D. Alexeev, G.K. Mallot, G. Mattson, G. Nukazuka, G. Reicherz, G. Sbrizzai, G.V. Khaustov, G.V. Meshcheryakov, H. Fischer, H. Pekeler, H. Schmieden, H. Suzuki, I.A. Savin, I. Denisenko, I. Gnesi, I. Konorov, J. Barth, J. Berenguer Antequera, J. Bernhard, J.-C. Peng, J. Giarra, J.H. Koivuniemi, J. Lichtenstadt, J. Marzec, J. Matousek, J.M. Friedrich, J. Novy, J. Pochodzalla, J. Pretz, J. Smolik, J. Tomsa, J. Veloso, K. Augsten, K. Kondo Horikawa, K. Kurek, K. Lavickova, K. Zaremba, L. Sinha, M. Ball, M. Bodlak, M. Chiosso, M. Faessler, M. Finger, M. Finger Jr., M.G. Alexeev, M. Gorzellik, M. Grosse Perdekamp, M. Jandek, M.L. Crespo, M. Meyer, M. Mikhasenko, M. Ostrick, M. Pesek, M. Peskova, M. Quaresma, M. Slunecka, M. Stolarski, M. Sulc, M. Virius, M. Wagner, M. Zavertyaev, M. Zemko, M. Ziembicki, N. d'Hose, N. Doshita, N. Horikawa, N. Makins, N. Makke, N. Mitrofanov, N. Pierre, O.M. Kouznetsov, O.P. Gavrichtchouk, O. Subrt, O.Yu. Denisov, P.D. Eversheim, P. Faccioli, P.-J. Lin, P. Joerg, P.M.M. Correia, P. Sznajder, P. Zavada, R. Beck, R. Heitz, R. Joosten, R. Longo, R.P. Kurjata, R.R. Dusaev, S.A. Mamon, S. Dalla Torre, S. Dasgupta, S. Gerassimov, S. Huber, S. Ishimoto, S. Levorato, S. Paul, S. Platchkov, S. Sarkar, S.S. Dasgupta, S. Tessaro, S.-U. Chung, S. Uhl, S.V. Donskov, S. Wallner, T. Iwata, T. Jary, T. Matsuda, T. Rudnicki, T. Szameitat, V. Andrieux, V. Anosov, V.A. Polyakov, V.D. Samoylenko, V.E. Burtsev, V.E. Lyubovitskij, V.F. Konstantinov, V. Frolov, V.N. Kolosov, V. Tskhay, W. Augustyniak, W.-C. Chang, W.-D. Nowak, W. Duennweber, W. Meyer, Y. Bedfer, Y. Kulinich, Y. Miyachi, Y.-S. Lian, Yu.A. Khokhlov, Yu. Kisselev, Yu.V. Mikhailov, Y. Zhao, Z. Kral","submitted_at":"2020-09-07T17:34:22Z","abstract_excerpt":"We report on a measurement of Spin Density Matrix Elements (SDMEs) in hard exclusive $\\omega$ meson muoproduction on the proton at COMPASS using 160 GeV/$c$ polarised $ \\mu ^{+}$ and $ \\mu ^{-}$ beams impinging on a liquid hydrogen target. The measurement covers the range 5.0 GeV/$c^2$ $< W <$ 17.0 GeV/$c^2$, with the average kinematics $\\langle Q^{2} \\rangle=$ 2.1 (GeV/$c$)$^2$, $\\langle W \\rangle= 7.6$ GeV/$c^2$, and $\\langle p^{2}_{\\rm T} \\rangle = 0.16$ (GeV/$c$)$^2$. Here, $Q^2$ denotes the virtuality of the exchanged photon, $W$ the mass of the final hadronic system and $p_T$ the transve"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2009.03271","kind":"arxiv","version":3},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2009.03271/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}