Few-body aspects of the near threshold pseudoscalar meson production

Abstract

During last decade large samples of data have been collected on the production of the ground-state pseudoscalar mesons in collisions of proton or deuteron beam with hydrogen or deuterium target. These measurements have been performed in the vicinity of the kinematical threshold for meson production where only a few partial waves in both initial and final state are expected to contribute to the production process. This simplifies significantly the interpretation of the data, yet still appears to be challenging due to the three or four particle final state systems with a complex hadronic potential. We review experiments and phenomenology of the near threshold production of the ground-state mesons in the few-body final states as for example: nucleus-meson and nucleon-nucleon-meson, and report on the status of the search of the mesic-nuclei (a meson-nucleus bound states). Experimental advantages of measurements close to the kinematical threshold are discussed, and general features of the production mechanism of the eta and eta prime mesons in the nucleon-nucleon collisions are presented emphasising results of measurements of spin and izospin dependence of the production cross sections.

Invited talk at the 22nd European Conference on Few Body Problems in Physics, 9 - 13 September 2013, Cracow, Poland

References in corpus (21)

• Measurement of the dp -->3He eta reaction near threshold
• Determination of the η'-nucleus optical potential
• Is there an eta-3He quasi--bound state ?
• Formation of eta-prime(958)-mesic nuclei by (p,d) reaction
• Feasibility Study of Observing eta' Mesic Nuclei with (p,d) Reaction
• Kaon Pair Production in Proton--Proton Collisions
• Kaon pair production close to threshold
• Formation of eta-mesic nuclei by (pi,N) reaction and N^*(1535) in medium
• Cross Section and Tensor Analysing Power of the $\vec{d}d\to \eta \alpha$ Reaction Near Threshold
• QCD symmetries in eta and etaprime mesic nuclei
• Mechanism of the close-to-threshold production of the eta meson
• Determination of the total width of the eta' meson
• Near threshold production of the eta meson via the quasi-free pn --> pn eta reaction
• Coupled-channel effects in the pp -> ppK+K- reaction
• Generalized Dalitz Plot analysis of the near threshold pp-->ppK+K- reaction in view of the K+K- final state interaction
• New determination of the mass of the eta meson at COSY-ANKE
• eta-prime Meson Production in Nucleon-Nucleon Collisions Near The Threshold
• Study of the eta meson production with the polarised proton beam
• Near threshold eta meson production in dp collisions
• Formation of η-Mesic Nuclei
• Study of the 3He-eta system in d-p collisions at COSY-11

Cited by in corpus (7)

• Constraining the optical potential in the search for eta-mesic 4He
• Status and Perspectives of the Search for Eta-Mesic Nuclei
• Luminosity determination for the proton-deuteron reaction using pd -> 3He eta channel with WASA-at-COSY detector
• Study of in-medium ${\eta }^{\prime }$ properties in the ($\gamma$, ${\eta }^{\prime }p$) reaction on nuclei
• Search for the 4He-eta bound state in dd->(4He-eta)_{bound}->3He n pi0 and dd->(4He-eta)_{bound}->3He p pi- reactions with the WASA-at-COSY facility
• Close to threshold eta' meson production in proton-proton collisions at COSY-11
• Production and interaction of the eta meson with nucleons and nuclei