ψ production in p¯ N and π-N interactions at 125 GeV/c and a determination of the gluon structure functions of the p¯ and the π-

Anassontzis, E. ; Malhotra, P. K. ; et., al (1993) ψ production in p¯ N and π-N interactions at 125 GeV/c and a determination of the gluon structure functions of the p¯ and the π- Physical Review D, 48 (11). pp. 5067-5080. ISSN 0556-2821

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Official URL: http://prd.aps.org/abstract/PRD/v48/i11/p5067_1

Related URL: http://dx.doi.org/10.1103/PhysRevD.48.5067

Abstract

We have measured the cross section for production of ψ and ψ' in ρ¯ and π- interactions with Be, Cu, and W targets in experiment E537 at Fermilab. The measurements were performed at 125 GeV/c using a forward dimuon spectrometer in a closed geometry configuration. The gluon structure functions of the ρ¯ and π- have been extracted from the measured ds/dxF spectra of the produced ψ 's. From the ρ¯ W data we obtain, for ρ¯ , xG(x)=(2.15± 0.7)[1-x](6.83± 0.5)[1+(5.85± 0.95)x]. In the ρ- case, we obtain, from the W and the Be data separately, xG(x)=(1.49± 0.03)[1-x](1.98± 0.06) (for π-W), xG(x)=(1.10± 0.10)[1-x](1.20 ± 0.20) (for π-Be).

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