Antiproton-proton annihilation into charged light meson pairs within effective meson theory

Ying Wang, Yury M. Bystritskiy, and Egle Tomasi-Gustafsson
Phys. Rev. C 95, 045202 – Published 7 April 2017

Abstract

We revisit antiproton-proton annihilation into light mesons in the energy domain relevant to the antiproton annihilation at Darmstadt (PANDA) experiment at the GSI Facility for Antiproton and Ion Research (FAIR) [2.25(1.5)s(pL)5.47(15) GeV (GeV/c) where s(pL) is the total energy (the beam momentum in the laboratory frame)]. An effective meson model is developed, with mesonic and baryonic degrees of freedom. Form factors are added to take into account the composite nature of the interacting hadrons. A comparison is made with the existing data for charged pion pair production and predictions for angular distributions and energy dependence in the range 3.362(5)s(pL)4.559(10.1) GeV (GeV/c). The model is applied to π±p elastic scattering, using crossing symmetry, and to charged kaon pair production, on the basis of SU(3) symmetry. In all cases the results illustrate a nice agreement with the data.

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  • Received 9 September 2016
  • Revised 7 February 2017

DOI:https://doi.org/10.1103/PhysRevC.95.045202

©2017 American Physical Society

Physics Subject Headings (PhySH)

Nuclear PhysicsParticles & Fields

Authors & Affiliations

Ying Wang

  • Univ Paris-Sud, CNRS/IN2P3, Institut de Physique Nucléaire, UMR 8608, 91405 Orsay, France

Yury M. Bystritskiy

  • Joint Institute for Nuclear Research, Dubna, Russia

Egle Tomasi-Gustafsson*

  • IRFU, CEA, Université Paris-Saclay, 91191 Gif-sur-Yvette Cedex, France

  • *etomasi@cea.fr

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Issue

Vol. 95, Iss. 4 — April 2017

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