Elsevier

Nuclear Physics A

Volume 569, Issue 4, 21 March 1994, Pages 791-820
Nuclear Physics A

Energy-dependent measurements of the pp elastic analyzing power and narrow dibaryon resonances

https://doi.org/10.1016/0375-9474(94)90385-9Get rights and content

Abstract

The energy dependence of the pp elastic analyzing power has been measured using an internal target during polarized beam acceleration. The data were obtained in incident-energy steps varying from 4 to 17 MeV over an energy range from 0.5 to 2.0 GeV. The statistical uncertainty of the analyzing power is typically less than 0.01. A narrow structure is observed around 2.17 GeV in the two-proton invariant mass distribution. A possible explanation for the structure with narrow resonances is discussed.

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1

Present address: National Laboratory for High Energy Physics (KEK), Tsukuba 305, Japan.

2

Present address: NEC Co. Ltd., Kawasaki 213, Japan.

3

Present address: Department of Physics, Yamagata University, Yamagata 990, Japan.

4

Present address: Fermi National Accelerator Laboratory, Batavia, IL 60510, USA.

5

Present address: Los Alamos National Laboratory, Los Alamos, NM 87545, USA.

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