High-mass dimuon production inp¯Nandπ−N interactions at 125 GeV/c
Clicks: 167
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 |
| URL | |
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