Enhanced leading production of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi mathvariant="italic">D</mml:mi></mml:mrow><mml:mrow><mml:mo>±</mml:mo></mml:mrow></mml:msup></mml:mrow></mml:math>and<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi mathvariant="italic">D</mml:mi></mml:mrow><mml:mrow><mml:mi mathvariant="normal">*</mml:mi><mml:mo>±</mml:mo></mml:mrow></mml:msup></mml:mrow></mml:math>in 250 GeV<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi mathvariant="normal">π</mml:mi></mml:mrow><mml:mrow><mml:mo>±</mml:mo></mml:mrow></mml:msup></mml:mrow></mml:math>-nucleon interactions

199476 citationsJournal Article

Authors

G. A. Alves

S. Amato

Abstract

A leading charm meson is one with longitudinal momentum fraction, ${\mathit{x}}_{\mathit{F}}$>0, whose light quark (or antiquark) is of the same type as one of the quarks in the beam particles. We report on the production asymmetry, A=[\ensuremath{\sigma}(leading-\ensuremath{\sigma}(nonleading)]/[\ensuremath{\sigma}(leading)+\ensuremath{\sigma}(nonleading)] as a function of ${\mathit{x}}_{\mathit{F}}$. The data consist of 1500 fully reconstructed ${\mathit{D}}^{\ifmmode\pm\else\textpm\fi{}}$ and ${\mathit{D}}^{\mathrm{*}\ifmmode\pm\else\textpm\fi{}}$ decays in Fermilab experiment E 769. We find a significant asymmetry for the production of charm quarks is not expected in perturbative quantum chromodynamics.

Topics & Keywords

Particle physics theoretical and experimental studies High-Energy Particle Collisions Research Quantum Chromodynamics and Particle Interactions

Publication Details

Published in: Physical Review Letters

Volume 72, Issue 6, pp. 812-815

DOI: 10.1103/physrevlett.72.812

Field-Weighted Citation Impact: 15.39

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Publication Details