Leading-particle effect from heavy-quark recombination.

The leading particle effect in charm hadroproduction is an enhancement of the cross section for a charmed hadron D in the forward direction of the beam when the beam hadron has a valence parton in common with the D. The large D(+)/D(-) asymmetry observed by the E791 experiment is an example of this phenomenon. We show that the heavy-quark recombination mechanism provides an economical expla-nation for this effect. In particular, the D(+)/D(-) asymmetry can be fit reasonably well using a single parameter whose value is consistent with a recent determination from charm photoproduction.

• Publication year

  2002

• Venue

  Physical Review Letters

• Publication date

  2002-05-14

• Fields of study

  Medicine, Physics

• Identifiers
  DOI 10.1103/PhysRevLett.89.122002arXiv hep-ph/0205149PMID 12225080
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar, PubMed

• The D(+)/D(-) asymmetry can be fit reasonably well within the heavy-quark recombination framework, and the fitted parameter is consistent with charm photoproduction.

  Confidence 0.95

  박진우 (dztg5apj7m) extractionB (s683577b42) reviewjihoonc (k5vuy3tzcm) review
• Heavy-quark recombination provides an economical explanation for the leading-particle effect in charm hadroproduction.

  Confidence 0.97

  박진우 (dztg5apj7m) extractionB (s683577b42) reviewjihoonc (k5vuy3tzcm) review

• charm hadroproduction

  process, production mechanism

  Production of charmed hadrons in collisions initiated by hadron beams.

  박진우 (dztg5apj7m) extractionB (s683577b42) reviewjihoonc (k5vuy3tzcm) review
• charm photoproduction

  process, production mechanism

  Production of charm in photon-induced reactions.

  박진우 (dztg5apj7m) extractionB (s683577b42) reviewjihoonc (k5vuy3tzcm) review
• d(+)/d(-) asymmetry

  observable, asymmetry

  The difference in production rates between positively and negatively charged D mesons.

  Aliases: D+/D- asymmetry, D plus/D minus asymmetry

  박진우 (dztg5apj7m) extractionB (s683577b42) reviewjihoonc (k5vuy3tzcm) review
• heavy-quark recombination mechanism

  mechanism, hadronization mechanism

  A hadronization mechanism in which a heavy quark combines with a light parton to form a charmed hadron.

  Aliases: heavy quark recombination

  박진우 (dztg5apj7m) extractionB (s683577b42) reviewjihoonc (k5vuy3tzcm) review
• leading-particle effect

  phenomenon

  An enhancement of forward charmed-hadron production when the beam hadron shares a valence parton with the produced hadron.

  Aliases: leading particle effect

  박진우 (dztg5apj7m) extractionB (s683577b42) reviewjihoonc (k5vuy3tzcm) review

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