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Tagging of η mesons using the pd → 3Heη reaction near threshold |
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| Authors: | Chr. Bargholtz L. Gerén V. N. Grebenev Yu. B. Gurov V. S. Karpukhin I. V. Laukhin B. V. Martem’yanov V. A. Matveev K. Lindberg V. S. Sopov P. -E. Tegnér B. A. Chernyshev R. R. Shafigullin I. Zartova |
| Affiliation: | (1) Stockholm University, Stockholm, Sweden;(2) Moscow Engineering Physics Institute, State University, Kashirskoe sh. 31, Moscow, 115409, Russia;(3) Institute for Theoretical and Experimental Physics, ul. Bol’shaya Cheremushkinskaya 25, Moscow, 117218, Russia |
| Abstract: | A zero-degree spectrometer for tagging η mesons on the CELSIUS/WASA facility is described, and its characteristics are presented. Tagging of η mesons is performed by detecting 3He ions produced by reaction pd → 3Heη close to the production threshold. The low background level (<2%) is in good agreement with the data obtained earlier on the SATURNE accelerator. |
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