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Asymmetries between the production of $D^+$ and $D^-$ mesons from 500-{GeV/c} $\pi^-$ - nucleon interactions as a function of $x_F$ and $p_t^2$

The E791 collaboration
Phys.Lett. B371 (1996) 157-162, 1996

Abstract (data abstract)
FNAL-TEV. E791 Collaboration. Study of asymmetries between the production of D+ and D- mesons from 500 GeV/c PI- - nucleon interaction as function of X and PT**2. Neither NLO QCD nor Vogt-Brodsky model nor default PYTHIA prediction does not describe the data, but agreement have been restored for & apos;tuned& apos; PYTHIA when C-quark mass was increased to 1.7 GeV, and average parton PT**2 increased to 1.0 Gev**2 (see paper). Numerical values supplied by Tom Carter.

  • Table 1

    Data from F 2

    10.17182/hepdata.41684.v1/t1

    Asymmetry parameter A = (SIG(D-)-SIG(D+))/(SIG(D+)+SIG(D-)) have been studied as function of Feynman variable X. 'Nucleus' are PT and C.

  • Table 2

    Data from T 4

    10.17182/hepdata.41684.v1/t2

    Asymmetry parameter A = (SIG(D-)-SIG(D+))/(SIG(D+)+SIG(D-)) have been studied as function of PT**2. 'Nucleus' are PT and C.

  • Table 3

    Data from T 4

    10.17182/hepdata.41684.v1/t3

    Asymmetry parameter A = (SIG(D-)-SIG(D+))/(SIG(D+)+SIG(D-)) have been studied as function of PT**2. 'Nucleus' are PT and C.

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