Study of exotic resonances in diffractive reactions

A V Zaitsev,D V Amelin,E B Berdnikov,A B Fenyuk,Yu Gouz,V A Dorofeev,R Dzhelyadin,A Ekimov,A N Karyukhin,I A Kachaev,Yu A Khokhlov,V F Konstantinov,S V Kopikov,V V Kostyukhin, S Likhoded,Viktor Matveev,V Nikolaenko,A Ostankov, B Polyakov, V A Senko, O Soloviyanov,A A Solodkov,E A Starchenko,E Vlassov,E G Tskhadadze

Nuclear Physics A（2000）

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摘要

The results of a partial wave analysis of 3π system produced in the reaction π−A → π+π−π−A at the momentum of 36.6 GeV/c on beryllium target are presented. Resonant signals from a′1(1750), a3(1860), a4(2050) are observed in different channels. Small bump at M ≈ 1.6GeV in the exotic wave JPCMη = 1−+1+ is seen. The combined analysis of VES data on this wave in η′π, b1(1235)π and ϱπ channels points to the existence of a hybrid meson with M ≈ 1.6 GeV.

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Resonance

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