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Research article 230 views

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

  • 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

physical review d, vol. 38, no. 5, pp. 1377–1403, 1988

https://doi.org/10.1103/physrevd.38.1377

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Abstract

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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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. (1988). High-mass dimuon production inp¯Nandπ−N interactions at 125 GeV/c. physical review d, 38(5), 1377–1403. https://doi.org/10.1103/physrevd.38.1377

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