On LEADING CHARMED MESON PRODUCTION IN Π–NUCLEON INTERACTIONS

Bednyakov, V. A.

doi:10.1142/s0217732395000077

Cited by 8 publications

(7 citation statements)

References 4 publications

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“…The neutral D mesons in Fig. 2(c Other final-state coalescence models have been proposed, including a valence spectator recombination model [31] and the valon model [32]. Two important unknowns in these models are the correlation between the charmed quark and the valence spec-tator in the recombination function and the n-particle parton distributions of the spectator and participant valence quarks.…”

Section: Leading-twist Productionmentioning

confidence: 99%

Charmed hadron asymmetries in the intrinsic charm coalescence model

Vogt

Brodsky

1996

Nuclear Physics B

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Fermilab experiment E791, measuring charmed hadron production in π − A interactions at 500 GeV with high statistics, has observed a strong asymmetry between the hadroproduction cross sections for leading D mesons which contain projectile valence quarks and the nonleading charmed mesons without projectile valence quarks. Such correlations of the charge of the D meson with the quantum numbers of the beam hadron explicitly contradict the factorization theorem in perturbative QCD which predicts that heavy quarks hadronize through a jet fragmentation function that is independent of the initial state. The E791 experiment also measures Λ c /Λ c and D s /D s production asymmetries as well as asymmetries in DD pair production. We examine these asymmetries and the fractional longitudinal momentum, x F , distributions for single and pairs of charmed hadrons within a two-component model combining leading-twist gg and qq fusion subprocesses with charm production from intrinsic heavy quark Fock states. A key feature of this analysis is intrinsic charm coalescence, the process by which a charmed quark in the projectile's Fock state wavefunction forms charmed hadrons by combining with valence quarks of similar rapidities.

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Section: Leading-twist Productionmentioning

confidence: 99%

Charmed hadron asymmetries in the intrinsic charm coalescence model

Vogt

Brodsky

1996

Nuclear Physics B

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“…In the scenario described in [9] for π − proton collisions, the annihilation of a u quark from the proton and the ū quark in the pion would liberate the d of the pion which in turn recombines to form a D − and certainly not a D + . On a similar base a ρ 0 proton collision will favor the production of D0 and D − over D 0 and D + depending on the quantum state of the colliding ρ 0 at the interaction point (see Fig.…”

Section: Charmed Meson Production By Recombinationmentioning

confidence: 99%

Production asymmetry of D mesons in γp collisions

et al. 2001

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We study the production asymmetry of charm versus anticharm mesons in photonproton interactions. We consider photon gluon fusion plus higher order corrections in which light quarks through vector meson -proton interactions contribute to the cross section. Non perturbative effects are included in terms of a recombination mechanism which gives rise to a production asymmetry. * This work was supported by: CLAF (Brazil) and CONACyT (México), CIEA-JIRA (México)

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“…Such reactions are usually analyzed within the hard parton scattering model (HPSM) suggested in [1,2]. This model was applied to the charmed meson production both in proton-proton and meson-proton interactions at high energies, see for example [3]. The HPSM is significantly improved by applying the QCD parton approach [4,5], see details in [6] and references therein.…”

Section: Introductionmentioning

confidence: 99%

Open charm and beauty production in hadron reactions

Lykasov

Lyubushkin

Bednyakov

2010

Nuclear Physics B - Proceedings Supplements

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The production of charmed and beauty hadrons in proton-proton and proton-antiproton collisions at high energies is analyzed within the modified quark-gluon string model (QGSM) including the internal motion of quarks in colliding hadrons. It is shown that using both the QGSM and NLO QCD one can describe the experimental data rather successfully in a wide region of transverse momenta. We also present some predictions for the future experiments on the beauty baryon production in pp collisions at LHC energies and on the charmed meson production inpp reactions at GSI energies.

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On LEADING CHARMED MESON PRODUCTION IN Π–NUCLEON INTERACTIONS

Cited by 8 publications

References 4 publications

Charmed hadron asymmetries in the intrinsic charm coalescence model

Charmed hadron asymmetries in the intrinsic charm coalescence model

Production asymmetry of D mesons in γp collisions

Open charm and beauty production in hadron reactions

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