On production of $\eta^{\prime}$ mesons in $pp$ collisions close to threshold

V. Baru; J. Haidenbauer; C. Hanhart; A. Kudryavtsev; P. Moskal; J. Speth

doi:doi:10.1007/s100500050368

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2023 Impact factor 2.6

Hadrons and Nuclei

Eur. Phys. J. A 6, 445-450

On production of $\eta^{\prime}$ mesons in pp collisions close to threshold

V. Baru^1,2 - J. Haidenbauer¹ - C. Hanhart³ - A. Kudryavtsev² - P. Moskal^1,4 - J. Speth¹

¹ Institut für Kernphysik, Forschungszentrum Jülich GmbH, 52425 Jülich, Germany
² Institute of Theoretical and Experimental Physics, 117258, B. Cheremushkinskaya 25, Moscow, Russia
³ Department of Physics and INT, University of Washington, Seattle, WA 98195-1560, USA
⁴ Institute of Physics, Jagellonian University, Reymonta 4, 30-059 Cracow, Poland

Received: 26 May 1999 / Revised version: 8 July 1999 Communicated by V.V. Anisovich

Abstract
The near threshold behaviour of the reaction cross section for $pp \to pp\eta^{\prime}$ , recently measured in experiments at COSY and SATURNE, is analyzed. The interaction in the pp as well as in the $\eta ' p$ final states is taken into account. The suppression of the total cross section for this process at excess energies Q < 3 MeV observed in these experiments is interpreted as an evidence for a strong repulsive $\eta^{\prime} p$ interaction.

PACS
13.75.-n Hadron-induced low- and intermediate-energy reactions and scattering (energy $\leq$ GeV) - 25.10.+s Nuclear reactions involving few-nucleon systems - 25.40.-h Nucleon-induced reactions