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The European Physical Journal A
ISSN: 1434-6001 (printed version)
ISSN: 1434-601X (electronic version)
Abstract Volume 1 Issue 2 (1998) pp 115-116
short notes: Search for d' in pion inclusive spectra from pp-interactions
B.M. Abramov, S.A. Bulychjov, A.I. Khanov, Y.S. Krestnikov, A.P. Krutenkova, V.V. Kulikov, M.A. Matsyuk, I.A. Radkevich, A.I. Sutormin, E.N. Turdakina (a)
Institute of Theoretical and Experimental Physics, B.Cheremushkinskaja 25, Moscow 117259, Russia
Received: 5 November 1997
Abstract: We report on our measurement of the inclusive spectrum of positive pions from the reaction pp-> <pi>+ + X on a CH2 internal target of the ITEP proton synchrotron at 1.5 GeV/c with a missing mass resolution of about 1 MeV/c2. The goal of our experiment was the search for the hypothetical narrow <pi>NN resonance (0.5\ MeV/c2 width and a mass of 2.06\ GeV/c2) with I(JPP)=even(0-), called d'. We do not see any statistically significant d'-signal. The upper limit for d' production cross-section in pp-interactions is near 2µb at 84% C.L.
PACS: 13.75.Cs Nucleon-nucleon interactions
(a) The corresponding author. Address: CERN, CH-1211 Geneva 23, Switzerland. Phone +41 22 767 1562, fax +41 22 767 8940. e-mail: Alexandre.Khanov@cern.ch
Communicated by B. Povh
Online publication: February 17, 1998
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