{"paper":{"title":"Spin Density Matrix Elements in Exclusive $\\rho ^0$ Meson Muoproduction","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-ph"],"primary_cat":"hep-ex","authors_text":"A. Amoroso, A. Bressan, A. Cicuttin, A. Efremov, A. G. Chumakov, A. G. Olshevsky, A. Grasso, A. Gridin, A. Guskov, A. Ivanov, A. Kerbizi, A. Khatun, A. Koval, A. Kveton, A. Maggiora, A. Magnon, A. Maltsev, A. Martin, A. M. Korzenev, A. M. Kotzinian, A. Moretti, A. Nagaytsev, A. Rychter, A. Rymbekova, A. Sandacz, A. Selyunin, A. Srnka, A. Thiel, A. Townsend, B. Badelek, B. Grube, B. Ketzer, B. M. Veit, B. Parsamyan, B. Valinoti, B. Ventura, C. Alice, C. Chatterjee, C. D. R. Azevedo, Ch. Dreisbach, C. Menezes Pires, C. Naim, C. Quintans, C. Riedl, C.-Y. Hsieh, D. D'Ago, D. Ecker, D. Eremeev, D. Giordano, D. I. Ryabchikov, D. Miura, D. Neyret, D. Panzieri, D. Sp\\\"ulbeck, D. von Harrach, D. V. Peshekhonov, E. Kabu\\ss, E. Mitrofanov, E. Zemlyanichkina, F. Bradamante, F. Del Carro, F. Gautheron, F. Kaspar, F. Klein, F. Krinner, F. Kunne, F. Metzger, F. Tessarotto, F. Tosello, G. D. Alexeev, G. K. Mallot, G. Mattson, G. Nukazuka, G. Reicherz, G. Sbrizzai, G. V. Khaustov, H. Fischer, H. Pekeler, H. Schmieden, H. Suzuki, I. A. Savin, I. Denisenko, I. Konorov, J. Barth, J. Bernhard, J.-C. Peng, J.F.C.A. Veloso, J. Giarra, J. H. Koivuniemi, J. Lichtenstadt, J. Marzec, J. Matou\\v{s}ek, J. M. Friedrich, J. Nov\\'y, J. Pochodzalla, J. Tomsa, K. Augsten, K. J. Fl\\\"othner, K. Kondo Horikawa, K. Kurek, K. Lavickova, K. Sharko, K. Zaremba, L.G. Garcia Ord\\`o\\~nez, L. Sinha, M. Bodlak, M. Chiosso, M. Faessler, M. Finger, M. Finger Jr., M. G. Alexeev, M. Gorzellik, M. Grosse Perdekamp, M. Gr\\\"uner, M. Hoffmann, M. Jandek, M. L. Crespo, M. Meyer, M. Mikhasenko, M. Niemiec, M. Ostrick, M. Pe\\v{s}ek, M. Pe\\v{s}kov\\'a, 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, O. M. Kouznetsov, O. P. Gavrichtchouk, O. Subrt, O. Yu. Denisov, P. Faccioli, P.-J. Lin, P. M. M. Correia, R. Beck, R. Joosten, R. Longo, R. Molina, 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. V. Donskov, S. Wallner, T. Iwata, T. Matsuda, T. Triloki, V. Andrieux, V. Anosov, V. A. Polyakov, V. D. Samoylenko, V. E. Burtsev, V. E. Lyubovitskij, V. F. Konstantinov, V. Frolov, V. Jary, V. N. Kolosov, V. Tskhay, W. Augustyniak, W.-C. Chang, W.-D. Nowak, W. D\\\"unnweber, W. Florian, W. Meyer, Y. Bedfer, Y. Miyachi, Y.-S. Lian, Yu. V. Mikhailov, Z. Kral","submitted_at":"2022-10-30T19:33:45Z","abstract_excerpt":"We report on a measurement of Spin Density Matrix Elements (SDMEs) in hard exclusive $\\rho ^0$ meson muoproduction at COMPASS using 160~GeV/$c$ polarised $ \\mu ^{+}$ and $ \\mu ^{-}$ beams impinging on a liquid hydrogen target. The measurement covers the kinematic range 5.0~GeV/$c^2$ $< W <$ 17.0~GeV/$c^2$, 1.0 (GeV/$c$)$^2$ $< Q^2 <$ 10.0 (GeV/$c$)$^2$ and 0.01 (GeV/$c$)$^2$ $< p_{\\rm{T}}^2 <$ 0.5 (GeV/$c$)$^2$. Here, $W$ denotes the mass of the final hadronic system, $Q^2$ the virtuality of the exchanged photon, and $p_{\\rm{T}}$ the transverse momentum of the $\\rho ^0$ meson with respect to t"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2210.16932","kind":"arxiv","version":2},"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/2210.16932/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"}