The potential of $\Lambda$ and ${\Xi }^{-}$ studies with PANDA at FAIR

Abstract

The antiproton experiment PANDA at FAIR is designed to bring hadron physics to a new level in terms of scope, precision and accuracy. In this work, its unique capability for studies of hyperons is outlined. We discuss ground-state hyperons as diagnostic tools to study non-perturbative aspects of the strong interaction, and fundamental symmetries. New simulation studies have been carried out for two benchmark hyperon-antihyperon production channels: $\bar{p}p\to \bar{\Lambda }\Lambda$ and $\bar{p}p\to {\bar{\Xi }}^{+}{\Xi }^{-}$. The results, presented in detail in this paper, show that hyperon-antihyperon pairs from these reactions can be exclusively reconstructed with high efficiency and very low background contamination. In addition, the polarisation and spin correlations have been studied, exploiting the weak, self-analysing decay of hyperons and antihyperons. Two independent approaches to the finite efficiency have been applied and evaluated: one standard multidimensional efficiency correction approach, and one efficiency independent approach. The applicability of the latter was thoroughly evaluated for all channels, beam momenta and observables. The standard method yields good results in all cases, and shows that spin observables can be studied with high precision and accuracy already in the first phase of data taking with PANDA.

26 pages, 16 figures. Changes: Revised title and abstract and corrections/clarifications in the text according to suggestions by journal referees

References in corpus (6)

• Matter and Antimatter in the Universe
• The Proton Radius Puzzle
• The nucleon spin and momentum decomposition using lattice QCD simulations
• All the Fun of the FAIR: Fundamental physics at the Facility for Antiproton and Ion Research
• The electromagnetic form factors of the $\Lambda$ in the timelike region
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Cited by in corpus (6)

• Production and decay of polarized hyperon-antihyperon pairs
• Novel method to extract the femtometer structure of strange baryons using the vacuum polarization effect
• Precise Measurement of Matter-Antimatter Asymmetry with Entangled Hyperon Antihyperon Pairs
• Unraveling the structure of $\Lambda$ hyperons with polarized $\Lambda \bar{\Lambda }$ pairs
• Probing $\Lambda$ potential at high and low densities via \(^3_Λ\)H production in C+C reactions
• Measurements of the Absolute Branching Fraction of the Semileptonic Decay ${\mathbf{\Xi }}^{-}\to \mathbf{\Lambda }{\mathbf{e}}^{-}{\bar{\nu }}_{\mathbf{e}}$ and the Axial Charge of the ${\mathbf{\Xi }}^{-}$