Odd and even partial waves of eta pi(-) and eta 'pi(-) in pi(-) p -> eta(('))pi(-)p at 191 GeV/c

C Adolph, R Akhunzyanov,M Alexeev,G D Alexeev,A Amoroso,V Andrieux,V Anosov,A Austregesilo,B Badelek,F Balestra,Johannes V Barth,Gunter Baum, Richard A Beck,Y Bedfer,A Berlin, J C Bernhard, K Bicker, E R Bielert, J Bieling,R Birsa,J Bisplinghoff, Martin Bodlak,M Boer,P Bordalo,F Bradamante,C Braun,A Bressan, M Buechele,E Burtin,L Capozza,M Chiosso,S U Chung,A Cicuttin,M L Crespo, Q Curiel,S Dalla Torre,S S Dasgupta,O Yu Denisov,S V Donskov,N Doshita,V Duic,W Duennweber,M Dziewiecki,Alexander M Efremov,C Elia,P D Eversheim,W Eyrich,M A Faessler,A Ferrero, M Finger,H M Fischer,C Franco,N Du Fresne Von Hohenesche,J M Friedrich,V V Frolov,F Gautheron,O P Gavrichtchouk,S G Gerassimov,R Geyer,I Gnesi,B Gobbo,S Goertz, M Gorzellik,S Grabmueller,A Grasso,B Grube, T Grussenmeyer,A Guskov,Florian Haas,D Von Harrach, D Hahne,Ronaldo Fumio Hashimoto, H Heinsius,F Herrmann,F Hinterberger,Ch Hoeppner,N Horikawa, N Dhose,S Huber,S Ishimoto, Andrey V Ivanov,Yu I Ivanshin,T Iwata,R G Jahn, V Jary,P Jasinski, P Joerg,R Joosten,E M Kabuss,B Ketzer,G V Khaustov,Yu A Khokhlov,Yu Kisselev, F J Klein,K Klimaszewski,J H Koivuniemi,V N Kolosov,K Kondo, K Koenigsmann,I Konorov,V F Konstantinov,A M Kotzinian,O Kouznetsov,M Kraemer,Z V Kroumchtein,N Kuchinski,F Kunne,Kyle C Kurek,R Kurjata,A A Lednev,A Lehmann,M Levillain,S Levorato,J Lichtenstadt,A Maggiora,A Magnon,N Makke,G K Mallot,C Marchand, A Martin,J Marzec,J Matousek,Hitoki Matsuda,Takeshi Matsuda, G Meshcheryakov, W T Meyer,T Michigami,Yu V Mikhailov,Y Miyachi,A Nagaytsev,T Nagel,F Nerling,S Neubert,D Neyret, J Novy,W D Nowak,A S Nunes,A G Olshevsky,I Orlov,M Ostrick,R Panknin,D Panzieri,B Parsamyan,S Paul,D V Peshekhonov,S Platchkov, J Pochodzalla,V A Polyakov,J Pretz, M Quaresma,C Quintans,S Ramos, C Regali,G Reicherz,E Rocco,N S Rossiyskaya,D I Ryabchikov,Anna M Rychter,V D Samoylenko,A Sandacz,S Sarkar,I Savin,G Sbrizzai,P Schiavon,C Schill,T Schlueter,K H Schmidt, H Schmieden,K Schoenning,S Schopferer,Matthias Schott,O Yu Shevchenko,Laura Gonzalez Silva,L Sinha, S Sirtl,M Slunecka,S Sosio,F Sozzi,A Srnka,L Steiger,M Stolarski,M Sulc,R Sulej, Hisanori Suzuki,A Szabelski, T Szameitat, P Sznajder,S Takekawa, J Ter Wolbeek,S Tessaro,F Tessarotto, F Thibaud,S Uhl,I Uman,M Virius,L Wang, T Weisrock, M Wilfert,R Windmolders,H Wollny,K Zaremba,M Zavertyaev,E Zemlyanichkina,M Ziembicki,A Zink

Physics Letters B（2015）

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摘要

Exclusive production of eta pi(-) and etau0027pi(-) in has been studied with a 191 GeV/c pi(-) 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/c(2). 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 a(2)(1320) and a(4)(2040) are in line with this similarity. In contrast, a strong enhancement of etau0027pi(-) over eta pi(-) is found for the L = 1, 3, 5 waves, which carry non-qq quantum numbers. The L = 1 intensity peaks at 1.7 GeV/c(2) in in and at 1.4 GeV/c(2) in eta pi(-),the corresponding phase motions with respect to L = 2 are different. (C) 2014 The Authors. Published by Elsevier B.V.

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