Analysis of the reaction π−p → π0ηn at 40 GeV/c beam momentum
1981; Elsevier BV; Volume: 193; Issue: 2 Linguagem: Inglês
10.1016/0550-3213(81)90334-5
ISSN1873-1562
AutoresW.D. Apel, K.H. Augenstein, E. Bertolucci, S.V. Donskov, A.V. Inyakin, V.A. Kachanov, F.Abdel Khalek, R.N. Krasnokutsky, M. Krüger, G. Leder, A.A. Lednev, I. Mannelli, Yu.V. Mikhailov, H. Müller, G.M. Pierazzini, Yu.D. Prokoshkin, M. Quaglia, H. Schneider, A. Scribano, F. Sergiampietri, R.S. Shuvalov, G. Sigurdsson, M.L. Vincelli,
Tópico(s)Quantum Chromodynamics and Particle Interactions
ResumoThe reaction π−p→π0ηn↳2y↳2y has been analyzed using data of an experimental performed at the 70 GeV accelerator, with the NICE 648 channel hodoscope spectrometer for γ ray detection. Events with 4γ seen are used for the analysis. A method is applied, which allows the determination of the number of π0η events for each mass, cosθGJ and t bin. Mass spectra, t distributions and decay angular distributions for the π0η system are presented. The cross section for the production of A20 is found to be 2.7 ± 1.1 μb at 40 GeV/c beam momentum. No indication of a resonant 1− state in the π0η system is observed, in spite of the fact that this state is allowed for the π0η system on the same footing as the observed 0+ and 2+ resonances.
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