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

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.; Bek, R.; Bedfer, Y.; Berlin, A.; Bernhardm, J.; K. Bicker, J; Q,; E. R. Bielert, J; J. Bieling, D; R. Birsa, Y; J. Bisplinghoff, C; M. Bodlak, S; M. Boer, V; P. Bordao, L; Bradamante, Franco; Y,; C. Braun, H; Bressan, Andrea; M. Büchele, I; E. Burtin, V; L. Capozza, V; M. Chiosso, Aa; Ac,; Suchung, S. U. Chung q; Acicuttin, A. Cicuttin z; Y,; M. L. Crespo, Z; Y,; Q. Curiel, V; Dalla Torre, Silvia; Dasgupta, Shuddha Shankar; S. Dasgupta, Y; O. Y. u. Denisov, Ac; S. V. Donskov, U; N. Doshita, Ag; Duic, Venicio; W. Dünnweber, P; M. Dziewiecki, Af; Aefremov, A. Efremov g; C. Elia, X; Y,; Pdeversheim, P. D. Eversheim c; Weyrich, W. Eyrich h; M. Faessler, P; A. Ferrero, V; M. Finger, S; M. FingerJr, S; H. Fscher, I; C. Franco, L; Dufresnevonhoheneschem, N.; J,; J. M. Friedrich, Q; V. Frolov, J; F. Gautheron, B; Opgavrichtchouk, O. P. Gavrichtchouk g; S. Gerassimv, O; Q,; R. Geyer, P; I. Gnesi, Aa; Ac,; B. Gobbo, Y; S. Goertz, D; M. Gorzellk, I; S. Grabmüller, Q; A. Grasso, Aa; Ac,; B. Grube, Q; Tgrussenmeyer, T. Grussenmeyer i; A. Guskov, G; Fhaas, F. Haas q; Vonharrachm, D.; D. Hahne, D; R. Hashimoto, Ag; Fhheinsius, F. H. Heinsius i; F. Herrmann, I; Fhinterberger, F. Hinterberger c; Ch Höppner, C. h. Höppner q; N. Hoikawa, R; N. d’Hose, V; S. Huber, Q; S. Ishimoto, Ag; A. Ivanov, G; Yuivanshin, Y. u. Ivanshin g; T. Iwata, Ag; R. Jahn, C; V. Jary, T; Jasinskim, P.; P. Jörg, I; R. Joosten, C; Kabußm, E.; B. Ketzer, Q; G. V. Khastov, U; Yuakhokhlov, Y. u. A. Khokhlov u; Yukisselev, Y. u. Kisselev g; F. Klein, D; K. Klimaszewski, Ad; J. H. Koivuniemi, B; V. N. Kolosov, U; K. Kondo, Ag; K. Köngsmann, I; I. Knrv, O; Q,; Vfkonstantinov, V. F. Konstantinov u; A. M. Kotzinian, Aa; Ac,; O. Kouznetsov, G; M. Krämer, Q; Z. V. Kroumchtein, G; N. Kuchinski, G; Fkunne, F. Kunne v; K. Kurek, Ad; R. P. Kurjata, Af; Aalednev, A. A. Lednev u; A. Lemann, H; M. Leillain, V; Levorato, Stefano; Lichtenstadtw, J.; A. Maggiora, Ac; Magnon, A.; Makke, Nour; Y,; G. K. Mallot, J; C. Marchand, V; Martin, Anna; J. Marzec, Af; Matousek, Jan; H. Matsuda, Ag; Tmatsuda, T. Matsuda n; G. Meshcheryakov, G; Wmeyer, W. Meyer b; T. Michigami, Ag; Yuvmikhailov, Y. u. V. Mikhailov u; Y. Miyachi, Ag; A. Naaytsev, G; T. Nagel, Q; Fnerlingm, F. Nerlingm; S. Neubert, Q; D. Neyret, V; J. Novy, T; W. DNowak, W. D. Nowak i; Asnunes, A. S. Nunes l; Agolshevsky, A. G. Olshevsky g; I. Orlov, G; Ostrickm, M.; R. Panknin, D; D. Panzieri, Ab; Ac,; B. Parsamyan, Aa; Ac,; Spaul, S. Paul q; D. V. Peshekhonov, G; S. Platchko, V; Pochodzallam, J.; Vapolyakov, V. A. Polyakov u; J. Pretz, D; M. Quaresma, L; C. Quintans, L; S. Ramos, L; C. Regal, I; G. Reicherz, B; E. Rocco, J; N. S. Rossiyskaya, G; D. I. Ryabchikov, U; A. Rychter, Af; V. D. Samoylenko, U; A. Sandacz, Ad; S. Sarkar, F; Iasavin, I. A. Savin g; G. Sbrizzai, X; Y,; Schiavon, Paolo; Y,; C. Schll, I; Tschlüter, T. Schlüter p; K. Schmdt, I; H. Schmieen, D; K. Schönning, J; S. Schopferer, I; M. Schott, J; Oyushevchenko, O. Y. u. Shevchenko g; L. Siva, L; L. Sinha, F; S. Srtl, I; M. Slunecka, G; S. Sosio, Aa; Ac,; Sozzi, Federica; Asrnka, A. Srnka e; L. Steiger, Y; M. Stoarski, L; M. Sulc, K; R. Sulej, Ad; H. Suzuki, Ag; A. Szabelski, Ad; Tszameitat, T. Szameitat i; P. Sznajder, Ad; Takekawa, Stefano; Ac,; J. terWolbeek, I; S. Tessaro, Y; Ftessarotto, F. Tessarotto y; Fthibaud, F. Thibaud v; S. Uhl, Q; Umanp, I.; M. Virius, T; L. Wang, B; Weisrockm, T.; Wilfertm, M.; R. Winmolers, D; H. Wollny, V; Zarembaaf, K.; M. Zavertyaev, O; E. Zemlyanichkina, G; M. Ziembicki, Af

doi:10.1016/j.physletb.2014.11.058

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.

Titolo:	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
Autori:	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 mostra contributor esterni nascondi contributor esterni
Data di pubblicazione:	2015
Rivista:	PHYSICS LETTERS. SECTION B
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.
Handle:	http://hdl.handle.net/11368/2844203
Digital Object Identifier (DOI):	http://dx.doi.org/10.1016/j.physletb.2014.11.058
URL:	http://www.sciencedirect.com/science/article/pii/S0370269314008685
Appare nelle tipologie:	1.1 Articolo in Rivista

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