P C --> MU- MU+ X
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Limit on the anti-d / anti-u asymmetry of the nucleon sea from Drell-Yan production

McGaughey, P.L. ; Moss, J.M. ; Alde, D.M. ; et al.
Phys.Rev.Lett. 69 (1992) 1726-1728, 1992.
Inspire Record 344919 DOI 10.17182/hepdata.19848

We present an analysis of 800-GeV proton-induced Drell-Yan production data from isoscalar targets 2H and C, and from W, which has a large neutron excess. The ratio of cross sections per nucleon, R-σW/σIS, is sensitive to the difference between the d¯(x) and u¯(x) structure functions of the proton. We find that R is close to unity in the range 0.04≤x≤0.27, allowing upper limits to be set on the d¯-u¯ asymmetry. Additionally, the shape of the differential cross section m3 d2σ/dxF dm for 2H at xF≊0 shows no evidence of an asymmetric sea in the proton. We examine the implications of these data for various models of the violation of the Gottfried sum rule in deep-inelastic lepton scattering.

1 data table
Table 1

Upper limit at the 2sigma statistical error level. Mass of MU+ MU- in GeV.


Measurement of Inclusive Muon Pair Production by 225-GeV/c $\pi^{+}$, $\pi^{-}$, and Proton Beams with a Large Acceptance Spectrometer

Branson, James G. ; Smith, Stew ;
FERMILAB-THESIS-1977-07, 1977.
Inspire Record 121707 DOI 10.17182/hepdata.1192

Inclusive muon pair production by 225 GeV/c $\pi^+, \pi^-$ and proton beams incident upon carbon and tin tarjets was measured over a large range of kinematic variables ($2m_{\mu} < m_{mm}$ < $1 GeV/c^2$, 0 < $x_F$ < $p_{\perp}$ < 4 GeV/c and $\mid cose^* 1 < .3$)...

13 data tables
Table 1

XL CALCULATED FOR FREE NUCLEON TARGET. Axis error includes +- 0.0/0.0 contribution (?////SYSTEMATIC ERRORS NOT GIVENFERMI//COULOMB).

Table 2

XL CALCULATED FOR FREE NUCLEON TARGET. Axis error includes +- 0.0/0.0 contribution (?////SYSTEMATIC ERRORS NOT GIVENFERMI//COULOMB).

Table 3

XL CALCULATED FOR FREE NUCLEON TARGET. Axis error includes +- 0.0/0.0 contribution (?////SYSTEMATIC ERRORS NOT GIVENFERMI//COULOMB).

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