Bonn 2025 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 16: Collisions, Scattering and Correlation Phenomena I

A 16.7: Vortrag

Mittwoch, 12. März 2025, 16:15–16:30, HS PC

Three-charged-particle systems in the framework of coupled coordinate-space few-body equations — •Renat Sultanov — The University of Texas Permian Basin, Odessa, Texas, USA

We study three-charged-particle low-energy elastic collision and particle-exchange reaction with special attention to the systems with Coulomb and an additional nuclear interaction employing a close-coupling expansion scheme to a set of coupled two-component few-body equations [1]. First we apply our formulation to compute low-energy elastic scattering phase shifts for the d+(tµ⁻)_1s collision, which is of significant interest for the muon-catalyzed-fusion D-T cycle. Next, we study the particle-exchange reaction d+(pX⁻) → p+(dX⁻) with the long lived elementary heavy lepton stau X⁻ which can play a critical role in the understanding of the Big-Bang nucleosynthesis and the nature of dark matter.

We also study the total cross sections and rates for two particle-exchange reactions involving antiprotons (p), deuteron (d) and triton (t), e.g., p+(dµ)_1s→ (pd)_1s+µ⁻ and p+(tµ)_1s→ (pt)_1s+µ⁻, where µ⁻ is a muon. The effect of the final state short-range strong (pd) and (pt) nuclear interaction is significant in these reactions, which increases the reaction rates by a factor of ≈ 3. Additionally (if time permits), a 3-body p+Mu collision will be discussed, where Mu is a muonium atom [2].

1. R. A. Sultanov and S. K. Adhikari, Phys. Rev. C 107, 064003 (2023).

2. R. A. Sultanov and D. Guster, J. Phys. B 46, 215204 (2013).

Keywords: Coulomb three-body systems; antiproton; strong interaction; few-body equations; tau slepton