D¯D meson pair production in antiproton-nucleus collisions

2016/10/27 by R. Shyam, K. Tsushima · 9 citations
Physics and Astronomy · #Antiproton #Bar (unit) #Baryon #Hadron #High-Energy Particle Collisions Research #Meson #Nuclear physics #Nucleon #Particle physics #Particle physics theoretical and experimental studies #Physics #Proton #Quantum Chromodynamics and Particle Interactions #hep-ex #hep-ph #nucl-ex #nucl-th

paper · pdf · doi:10.1103/physrevd.94.074041

published in Physical review. D/Physical review. D. 94(7) (American Physical Society) · 23 pages, 8 figures, Journal print version

openalex created_date 2016/10/14 · openalex publication_date 2016/10/27 · arxiv created 2016/10/28 · arxiv updated 2016/11/02 · openalex updated_date 2026/08/06

Abstract

We study the DD (D⁰D⁰ and D^\ensuremath-D⁺) charm meson pair production in antiproton (p) induced reactions on nuclei at beam energies ranging from threshold to several GeV. Our model is based on an effective Lagrangian approach that has only the baryon-meson degrees of freedom and involves the physical hadron masses. The reaction proceeds via the t-channel exchanges of \mathrm\ensuremathΛ_c⁺, \mathrm\ensuremathΣ_c⁺, and \mathrm\ensuremathΣ_c⁺⁺ baryons in the initial collision of the antiproton with one of the protons of the target nucleus. The medium effects on the exchanged baryons are included by incorporating in the corresponding propagators, the effective charm baryon masses calculated within a quark-meson coupling (QMC) model. The wave functions of the bound proton have been determined within the QMC model as well as in a phenomenological model where they are obtained by solving the Dirac equation with appropriate scalar and vector potentials. The initial- and final-state distortion effects have been approximated by using an eikonal approximation-based procedure. Detailed numerical results are presented for total and double differential cross sections for the D⁰D⁰ and D^\ensuremath-D⁺ production reactions on ¹⁶O and ⁹⁰Zr targets. It is noted that at p beam momenta of interest to the PANDA experiment, medium effects lead to noticeable enhancements in the charm meson production cross sections.

Citations

• The quark-meson coupling model for Λ, Σ and Ξ hypernuclei
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• Hadrons in strongly interacting matter
• Nucleon and hadron structure changes in the nuclear medium and the impact on observables
• Self-consistent description of Λ hypernuclei in the quark-meson coupling model
• Review of Particle Physics
• Big-Bang Nucleosynthesis

Cited by

• Inclusive production of charged pion pairs in proton-antiproton collisions
• Nuclear-bound quarkonia and heavy-flavor hadrons
• Charmed-baryon production in antiproton-proton collisions within an effective Lagrangian model