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Diffractively produced charm final states in 800-GeV/c pp collisions.

M H Wang1, M C Berisso, D C Christian

  • 1University of Massachusetts, Amherst, 01003, USA.

Physical Review Letters
|August 11, 2001
PubMed
Summary

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2022 TUNISIAN NATIONAL CONGRESS OF MEDICINE ABSTRACTS.

La Tunisie medicale·2023

This study presents the first observation of open charm production via diffraction in proton-proton collisions. Researchers measured cross-sections for D*+ and D*- mesons, contributing new data to fixed-target charm experiments.

Area of Science:

  • High Energy Physics
  • Particle Physics
  • Nuclear Physics

Background:

  • Open charm production in proton-proton collisions is a key area for understanding quantum chromodynamics.
  • Diffractive processes offer unique insights into the structure of hadrons and the dynamics of particle interactions.

Purpose of the Study:

  • To report the first observation of diffractively produced open charm particles in proton-proton collisions.
  • To measure the cross-sections for the diffractive production of D*+ and D*- mesons.

Main Methods:

  • Analysis of data from FNAL E690 experiment using 4.3x10^9 recorded events.
  • Utilized fixed-target proton-proton collisions at 800-GeV/c.
  • Focused on the specific reaction type pp-->pD*X.

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Main Results:

  • Measured cross-section for diffractive D*+ production: sigma(diff)(D*+) = (0.185+/-0.044+/-0.054) mu b.
  • Measured cross-section for diffractive D*- production: sigma(diff)(D(*-)) = (0.174+/-0.034+/-0.029) mu b.
  • These results represent the first observation of this phenomenon in this collision type.

Conclusions:

  • The study successfully observed and quantified diffractively produced open charm in fixed-target proton-proton collisions.
  • The measured cross-sections provide valuable data for theoretical models of charm production.
  • Comparison with previous fixed-target charm experiments will be discussed to contextualize these findings.