High-mass dimuon production inp¯Nandπ−N interactions at 125 GeV/c

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ID: 271296
1988
We have studied muon pairs with an invariant mass between 4 and 9 GeV/c2 produced in p¯N and π−N interactions at an incident momentum of 125 GeV/c. The experiment was performed at Fermilab using a tungsten target and a special beam enriched to contain 18% antiprotons. We compare differential distributions as functions of the dimuon invariant mass, Feynman x, transverse momentum, and decay angles of the dimuon to the predictions of the Drell-Yan model including QCD corrections. Quark structure functions for the p¯ and π− are extracted. Comparisons of the antiproton data to the Drell-Yan model are significant because the cross sections depend principally on the valence-quark structure functions which are accurately determined by deep-inelastic scattering measurements. The measured absolute cross section (integrated over positive Feynman x and all transverse momenta) is 0.106±0.005±0.008 nb/nucleon for the p¯N interaction and 0.107±0.003±0.009 nb/nucleon for the π−N interaction, where the quoted errors are statistical and systematic, respectively. Normalization (K) factors that are required to bring the naive Drell-Yan and first-order QCD predictions into agreement with the measurements are extracted, and the uncertainties involved in such comparisons are examined.
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Authors E. Anassontzis,S. Katsanevas,E. Kiritsis,C. Kourkoumelis,A. Markou,L. K. Resvanis,G. Voulgaris,M. Binkley,B. Cox,J. Enagonio,C. Hojvat,D. Judd,R. D. Kephart,P. K. Malhotra,P. O. Mazur,C. T. Murphy,F. Turkot,R. L. Wagner,D. Wagoner,W. Yang,H. Areti,S. Conetti,P. Lebrun,D. G. Ryan,T. Ryan,W. Schappert,D. G. Stairs,C. Akerlof,X. Cui,P. Kraushaar,D. Nitz,R. Thun,L. Wang,He Mao,Zhang Nai-Jian;E. Anassontzis;S. Katsanevas;E. Kiritsis;C. Kourkoumelis;A. Markou;L. K. Resvanis;G. Voulgaris;M. Binkley;B. Cox;J. Enagonio;C. Hojvat;D. Judd;R. D. Kephart;P. K. Malhotra;P. O. Mazur;C. T. Murphy;F. Turkot;R. L. Wagner;D. Wagoner;W. Yang;H. Areti;S. Conetti;P. Lebrun;D. G. Ryan;T. Ryan;W. Schappert;D. G. Stairs;C. Akerlof;X. Cui;P. Kraushaar;D. Nitz;R. Thun;L. Wang;He Mao;Zhang Nai-Jian;
Journal physical review d
Year 1988
DOI 10.1103/physrevd.38.1377
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