EPJ

2022 Impact factor 2.7
EPJ A - Hadrons and Nuclei
Hadrons and Nuclei
Eur. Phys. J. A 1, 115-116

Short note

Search for d' in pion inclusive spectra from pp-interactions

B.M. Abramov - S.A. Bulychjov - A.I. Khanov - Yu.S. Krestnikov - A.P. Krutenkova - V.V. Kulikov - M.A. Matsyuk - I.A. Radkevich - A.I. Sutormin - E.N. Turdakina

Institute of Theoretical and Experimental Physics, B.Cheremushkinskaja 25, Moscow 117259, Russia

Received: 5 November 1997 Communicated by B. Povh

Abstract
We report on our measurement of the inclusive spectrum of positive pions from the reaction $pp\rightarrow \pi^+ + X$ on a CH2 internal target of the ITEP proton synchrotron at $1.5\ GeV/c$ with a missing mass resolution of about $1\ MeV/c^2$. The goal of our experiment was the search for the hypothetical narrow $\pi NN$ resonance ($0.5\ MeV/c^2$ width and a mass of $2.06\ GeV/c^2$) with I(JP)=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 $2\ \mu b$ at $84\%\ C.L.$

PACS
13.75.Cs Nucleon-nucleon interactions

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