Exclusive production of ηπ− and η π− has been studied with a 191 GeV/c π− beam impinging on a hydrogen target at COMPASS (CERN). Partial-wave analyses reveal different odd/even angular momentum (L) characteristics in the inspected invariant mass range up to 3 GeV/c2. A striking similarity between the two systems is observed for the L = 2, 4, 6 intensities (scaled by kinematical factors) and the relative phases. The known resonances a2(1320) and a4(2040) are in line with this similarity. In contrast, a strong enhancement of η π− over ηπ− is found for the L = 1, 3, 5 waves, which carry non-q¯q quantum numbers. The L = 1 intensity peaks at 1.7 GeV/c2 in η π− and at 1.4 GeV/c2 in ηπ−, the corresponding phase motions with respect to L =2 are different.
Odd and even partial waves of f ηπ−ηπ− and η′π−η′π− in π−p→η(′)π−pπ−p→η(′)π−p at 191 GeV/c / C., Adolph; R., Akhunzyanov; M. G., Alexeev; G. D., Alexeev; A., Amoroso; V., Andrieux; V., Anosov; A., Austregesilo; B., Badełek; F., Balestra; J., Barth; G., Baum; R., Bek; Y., Bedfer; A., Berlin; Bernhardm, J.; J, K. Bicker; Q, ; J, E. R. Bielert; D, J. Bieling; Y, R. Birsa; C, J. Bisplinghoff; S, M. Bodlak; V, M. Boer; L, P. Bordao; Bradamante, Franco; Y, ; H, C. Braun; Bressan, Andrea; I, M. Büchele; V, E. Burtin; V, L. Capozza; Aa, M. Chiosso; Ac, ; Suchung, S. U. Chung q; Acicuttin, A. Cicuttin z; Y, ; Z, M. L. Crespo; Y, ; V, Q. Curiel; DALLA TORRE, Silvia; Dasgupta, SHUDDHA SHANKAR; Y, S. Dasgupta; Ac, O. Y. u. Denisov; U, S. V. Donskov; Ag, N. Doshita; Duic, Venicio; P, W. Dünnweber; Af, M. Dziewiecki; Aefremov, A. Efremov g; X, C. Elia; Y, ; Pdeversheim, P. D. Eversheim c; Weyrich, W. Eyrich h; P, M. Faessler; V, A. Ferrero; S, M. Finger; S, M. FingerJr; I, H. Fscher; L, C. Franco; Dufresnevonhoheneschem, N.; J, ; Q, J. M. Friedrich; J, V. Frolov; B, F. Gautheron; Opgavrichtchouk, O. P. Gavrichtchouk g; O, S. Gerassimv; Q, ; P, R. Geyer; Aa, I. Gnesi; Ac, ; Y, B. Gobbo; D, S. Goertz; I, M. Gorzellk; Q, S. Grabmüller; Aa, A. Grasso; Ac, ; Q, B. Grube; Tgrussenmeyer, T. Grussenmeyer i; G, A. Guskov; Fhaas, F. Haas q; Vonharrachm, D.; D, D. Hahne; Ag, R. Hashimoto; Fhheinsius, F. H. Heinsius i; I, F. Herrmann; Fhinterberger, F. Hinterberger c; Ch Höppner, C. h. Höppner q; R, N. Hoikawa; V, N. d’Hose; Q, S. Huber; Ag, S. Ishimoto; G, A. Ivanov; Yuivanshin, Y. u. Ivanshin g; Ag, T. Iwata; C, R. Jahn; T, V. Jary; Jasinskim, P.; I, P. Jörg; C, R. Joosten; Kabußm, E.; Q, B. Ketzer; U, G. V. Khastov; Yuakhokhlov, Y. u. A. Khokhlov u; Yukisselev, Y. u. Kisselev g; D, F. Klein; Ad, K. Klimaszewski; B, J. H. Koivuniemi; U, V. N. Kolosov; Ag, K. Kondo; I, K. Köngsmann; O, I. Knrv; Q, ; Vfkonstantinov, V. F. Konstantinov u; Aa, A. M. Kotzinian; Ac, ; G, O. Kouznetsov; Q, M. Krämer; G, Z. V. Kroumchtein; G, N. Kuchinski; Fkunne, F. Kunne v; Ad, K. Kurek; Af, R. P. Kurjata; Aalednev, A. A. Lednev u; H, A. Lemann; V, M. Leillain; Levorato, Stefano; Lichtenstadtw, J.; Ac, A. Maggiora; A., Magnon; Makke, Nour; Y, ; J, G. K. Mallot; V, C. Marchand; Martin, Anna; Af, J. Marzec; Matousek, Jan; Ag, H. Matsuda; Tmatsuda, T. Matsuda n; G, G. Meshcheryakov; Wmeyer, W. Meyer b; Ag, T. Michigami; Yuvmikhailov, Y. u. V. Mikhailov u; Ag, Y. Miyachi; G, A. Naaytsev; Q, T. Nagel; Fnerlingm, F. Nerlingm; Q, S. Neubert; V, D. Neyret; T, J. Novy; W. DNowak, W. D. Nowak i; Asnunes, A. S. Nunes l; Agolshevsky, A. G. Olshevsky g; G, I. Orlov; Ostrickm, M.; D, R. Panknin; Ab, D. Panzieri; Ac, ; Aa, B. Parsamyan; Ac, ; Spaul, S. Paul q; G, D. V. Peshekhonov; V, S. Platchko; Pochodzallam, J.; Vapolyakov, V. A. Polyakov u; D, J. Pretz; L, M. Quaresma; L, C. Quintans; L, S. Ramos; I, C. Regal; B, G. Reicherz; J, E. Rocco; G, N. S. Rossiyskaya; U, D. I. Ryabchikov; Af, A. Rychter; U, V. D. Samoylenko; Ad, A. Sandacz; F, S. Sarkar; Iasavin, I. A. Savin g; X, G. Sbrizzai; Y, ; Schiavon, Paolo; Y, ; I, C. Schll; Tschlüter, T. Schlüter p; I, K. Schmdt; D, H. Schmieen; J, K. Schönning; I, S. Schopferer; J, M. Schott; Oyushevchenko, O. Y. u. Shevchenko g; L, L. Siva; F, L. Sinha; I, S. Srtl; G, M. Slunecka; Aa, S. Sosio; Ac, ; Sozzi, Federica; Asrnka, A. Srnka e; Y, L. Steiger; L, M. Stoarski; K, M. Sulc; Ad, R. Sulej; Ag, H. Suzuki; Ad, A. Szabelski; Tszameitat, T. Szameitat i; Ad, P. Sznajder; Takekawa, Stefano; Ac, ; I, J. terWolbeek; Y, S. Tessaro; Ftessarotto, F. Tessarotto y; Fthibaud, F. Thibaud v; Q, S. Uhl; Umanp, I.; T, M. Virius; B, L. Wang; Weisrockm, T.; Wilfertm, M.; D, R. Winmolers; V, H. Wollny; Zarembaaf, K.; O, M. Zavertyaev; G, E. Zemlyanichkina; Af, M. Ziembicki. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - STAMPA. - 740:(2015), pp. 303-311. [10.1016/j.physletb.2014.11.058]
Odd and even partial waves of f ηπ−ηπ− and η′π−η′π− in π−p→η(′)π−pπ−p→η(′)π−p at 191 GeV/c
BRADAMANTE, FRANCO;BRESSAN, Andrea;DALLA TORRE, SILVIA;DASGUPTA, SHUDDHA SHANKAR;DUIC, VENICIO;LEVORATO, STEFANO;Makke, Nour;MARTIN, ANNA;MATOUSEK, JAN;SCHIAVON, PAOLO;SOZZI, FEDERICA;TAKEKAWA, STEFANO;
2015-01-01
Abstract
Exclusive production of ηπ− and η π− has been studied with a 191 GeV/c π− beam impinging on a hydrogen target at COMPASS (CERN). Partial-wave analyses reveal different odd/even angular momentum (L) characteristics in the inspected invariant mass range up to 3 GeV/c2. A striking similarity between the two systems is observed for the L = 2, 4, 6 intensities (scaled by kinematical factors) and the relative phases. The known resonances a2(1320) and a4(2040) are in line with this similarity. In contrast, a strong enhancement of η π− over ηπ− is found for the L = 1, 3, 5 waves, which carry non-q¯q quantum numbers. The L = 1 intensity peaks at 1.7 GeV/c2 in η π− and at 1.4 GeV/c2 in ηπ−, the corresponding phase motions with respect to L =2 are different.| File | Dimensione | Formato | |
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